CA1319819C - Formation fracturing process - Google Patents

Formation fracturing process

Info

Publication number
CA1319819C
CA1319819C CA000601660A CA601660A CA1319819C CA 1319819 C CA1319819 C CA 1319819C CA 000601660 A CA000601660 A CA 000601660A CA 601660 A CA601660 A CA 601660A CA 1319819 C CA1319819 C CA 1319819C
Authority
CA
Canada
Prior art keywords
gel
condensation product
formation
fluid
wellbore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CA000601660A
Other languages
French (fr)
Inventor
Lisa A. Cantu
Edward F. Mcbride
Marion W. Osborne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ConocoPhillips Co
Original Assignee
Conoco Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US07/155,786 priority Critical patent/US4848467A/en
Priority to EP89305510A priority patent/EP0401431A1/en
Application filed by Conoco Inc filed Critical Conoco Inc
Priority to CA000601660A priority patent/CA1319819C/en
Application granted granted Critical
Publication of CA1319819C publication Critical patent/CA1319819C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25Methods for stimulating production
    • E21B43/26Methods for stimulating production by forming crevices or fractures
    • E21B43/261Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60Compositions for stimulating production by acting on the underground formation
    • C09K8/62Compositions for forming crevices or fractures

Abstract

FORMATION FRACTURING PROCESS

Abstract of the Disclosure Hydroxyacetic acid condensation product is used as a fluid loss material in a formation fracturing process in which a fracturing fluid comprising a hydrolyzable aqueous gel is used. The hydroxyacetic acid condensation product degrades at formation conditions to provide hydroxyacetic acid which breaks the aqueous gel,which provides restored formation permeability without the need for separate addition of gel breaker.

Description

- 1 13198~9 - Case No. 7882 FORMATION FRACTURING PROCESS

5 1. Technical Field This invention relates to OF process for fracturing a subterranean formation such as an oil and/or gas producing formation in order to inuease the effective permeability in a portion of the formation surrounding a wellbore penetrating the formation and to enhance the productivity or injectivity of the well.
More particularly, the invention relates to an improved process for removing a gel filter pad which typically builds up on the surfaces of a wellbore and on fractures resulting from fracturing the forrnation using an aqueous gel material as a part of the fracturing fluid.

I5 2. Backaround and Summarv of the Invention Hydraulic fracturing a subterranean formations is an old and highly developed process, used primarily to increase the permeability of a portion of aformation surrounding a wellbore. The process may be applied to new wells to increase productivity, or to old wells to increase or restore productivity. The process is also applicable to injection wells used in secondary recovery or fluid disposal operations.
In a typical fracturing process, a thickened fluid such as an aqueous gel or an emulsion is utilized. The thickened fluid increases the fracturing effect and also supports proppant material which is deposited in the fractures created by the process. In many cases, a fluid loss additive material is included with the fracturing fluid to further enhance the results. A common fluid loss additive material is silica flour. Many other natural and synthetic solid materials have been utilized as fluid loss additives in fracturing processes.
A detailed description of the hydraulic fracturing process, including a redtation of suitable gelling agents useful therein, is found in U.S. Patent 4,470,915 to Conway.
When solid fluid loss additives are included in the fracturing tluld, a gel filter pad comprising fluid loss additive and concentrated gel material forms on the surfaces of the wellbore and the fractures created by the process. Ideally, this gel 'X ~
filter pad is subsequently removed by backflow of fluid from the formation (except in the case of injection wells), but in actual practice, it is usually necessary to follow S the treatment with gel breaking and/or gel filter pad removal steps. These steps often only recover a small fraction of the potential productivity of the well.
A fracturing fluid comprised of an aqueous gel and a hydrolyzable organic ester which breaks the gel is described in U.S. Patent 3,960,736 to Oreeet al. That patent does not suggest that the organic ester is used in an amount or form to provide fluid loss properties to the treatment fluid.
U.S. Patents 4,387,769 and 4,526,695 to Erbstoesser et al. described use of a polyester polymer as a fluid loss additive material. The polymers degrade at formation conditions to fadlitate removal from the treated well.
U.S. Patent 3,868,998 to Lybarger et al. describes a process for l 5 placing a self-cleaning pack of particles in a formation utilizing a solution of a slowly reactive acid-yielding material.
U.S. Patent 4,715,967 to Bellis et al. describes a condensation product of hydroxyacetic add with itself or other compounds, the condensation product having the ability to provide fluid loss properties to a fluid and being degradable at formation conditions. The condensation products described in that patent are particularly useful in the process of this invention.
Accordingiy to the present invention, condensation products of the type described in the aforementioned Bellis et al. patent are utilized in a fracturing fluid to provide fluid loss properties and to also provide gel breaking capabilities such that the gel hlter pad comprised of condensation product and concentrated gel onthe wellbore and fracture surfaces is essentially completely removed, thereby restoring full permeability to the well.

DescriDtion of the Preferred Embodiment The process of this invention basically is a hydraulic fracturing procedure utilizing as the fracturing fluid an aqueous gel with a specific fluid loss additive in a spedfic amount.
The fluid loss additives in the present invention comprise inexpensive, low molecular weight condensation products of hydroxyacetic acid with itself or with X

~3~ 1319819 compounds containing other hydroxy-, carboxylicadd- or hydroxycarboxylic-add moieties. The condensation products are friable solids with a melting point of about 160C or higher and being substantially crystalline at both ambient and wellboretemperature. They have a number average molecular weight of 200 to 4000 and preferably are oligomers having a number average molecular weight of about 200 to about 650. They are primarily trimers up through decamers. They are insolublein both aqueous and hydrocarbon media but will degrade at spedfic rates in the lo presence of moisture and temperatures above about 50C to form oil- andlorwater-soluble monomers and dimers. Rate of hydrolysis at a given temperature can be inueased by incorporating small amounts of other molecules (usually less than 15%
by weight) into the hydroxyacetic add condensation reaction. These materials areusually flexible or more bulky molecules that partially disrupt crystallinity but leave the condensation product friable. Thus, the treatment agent can be tailored to adjust the rate of hydrolysis from a few hours to several days by controlling the amount and nature of the uystallinity.
- As used herein, the term "hydroxyacetic acid condensation product"
refers to a material within the description in the preceding paragraph.
The aqueous gels applicable to the present invention include those formed from the gelling agents recited in the aforementioned U~S. Patent 4,470,915.
The most commonly used gelling agent, and the preferred one for purposes of thisinvention, is crosslinked hydroxypropylguar.
The treatment fluid in accordance with the invention comprises an aqueous gel, preferably substantially completely hydrolyzed, and a fluid loss additive comprised at least in part of hydroxyacetic acid condensation product. The amount of condensation product in the treatment fluid is at least that amount which, upon degradation, results in substantial removal of the gel filter pad formed during the fracturing step. For normal fracturing treatments, at least 30 pounds of condensation product per 1,000 gallons of treatment fluid is necessary.
Condensation X

product concentration in treatment fluid refers to the portion of the treatment fluid to which it is added. It is not unusual to use one or more slugs of treatment fluid S during the procedure which do not contain the fluid loss additive.
To illustrate the unexpected results obtained by the process of this invention, simulated fracturing treatments using hydroxyacetic acid condensationproducts were carried out and the results compared to simulated treatments usingother fluid loss additive materials. These simulated treatments and the results are 10 described and set forth in the following examples.
FRACTURING TREATMENT SIMULATION PROCEDURES
The fracturing fluid reservoirs for this study were two 55-gallon polyethylene drums manifolded together. The base gel was batch mixed by adding gel and additives to the drum while circulating with a Moyno* pump at 20 15 gal/min. The base gel consisted of 2% KCI + 40 pounds per thousand gallons Hi-Tek* polymer HP-8 (hydroxypropylguar) with 2Ih pounds per thousand gallons fumaric acid and 10 pounds per thousand gallons sodium bicarbonate.
During a fracturing fluid run, the base gel was fed to an open blending device by the Moyno pump where the fluid was stirred with a ribbon shaped 20 stirring device while sodium persulfate and fluid loss additives were added.
Delayed titanate crosslinker (.8 gal Tyzor* 101) was added with a syringe pump on the low pressure side of the intensifier system.
The fluid proceeded from the intensifier pumps to a length of 'b inch tubing where it was sheared at near 1000/sec for 5 minutes to simulate pumping down 25 tubing at 12 barrels per minutes. The fluid then entered a length of I inch tubing surrounded by a heating jacket. The shear rate was 40-50/sec while undergoing heat-up to formation temperature. A temperature of 50 C was selected to represent the average cool down temperature of a point within 50 feet of the wellbore in formations with a bottom hole temperature of 85 o C. Residence time 30 in the formation simulator was approximately 5 minutes. With a bottom hole temperature of 85oC, the formation simulator was set at 50C to model cooldown.

*denotes trade mark r~

Once the nuid was heated at 40-50/sec it flowed through the test cell, again at a shear rate o~ 40-50/sec. Flow was between 2-3/8 indh slabs of core that had5 been saturated with 2% KCI. The leakoff rate through eadh core was monitored versus time. The fluid travelled to a series of high pressure knodk-out pots where the sand-laden fluid was collected and dumped while maintaining a constant pressure of 1000 psi on the system.
A complexed gel pump time of 90 minutes was performed on all 10 reported tests. The time was divided into the following stages:
Staqe Fluid Test 2% KCI 10 min 2 Base Gel 10 min 3 Complexed Gel Pad 90 min 4 Slurry to padk cell to desired concentration The amount of proppant was selected to provide 2 pounds per square foot in the 1/3 indh slot. The final slurry was flowed into the cell and the cell shut in. The pipe-to-slot flow ends were removed and replaced with inserts containinga 118 inch hole with a filter screen to confine proppant to the cell during dosure.
The top piston setscrews and spacers were removed and closure was applied while heating to 85C and monitoring leakoff. A closure of 1000 psi was applied over the course of 30 minutes.
Fluid was leaked off until a net cell pressure of zero was obtained (closure-intemal cell pressure = 0). This amounted to 23 ml of static leakoff. At this point the cell was shut in at temperature and allowed to set static for 4 hours. After 4 hours, 2% KCI flow was initiated through the core and padk simulating flow badk while dosure was slowly increased to 4000 psi. Thereafter conductivity and permeability of the pack was monitored versus time for 50 hours.
Using the above procedure, the conductivity, conductivity coefficient Cw, permeability and retained permeability (compared to a control) were determined for treatment fluids containing various fluid loss additives. The results are summarized in Table 1 below. In each run, the base fluid was a 2% KCI plus 40 pounds per thousand gallons crosslinked hydroxypropylguar and test temperature X

was 185F, except for the last run in which test temperature was 200F.

S Rebiled Additives Effective CwConductivityPermeability Permeability (Der maal) (ft/minX~ (md-ft) (darcies) (%)' 50 pounds HM~ .0017 7919 482 100 50 pounds Silica Flour .0028 48 3 0.6 50 pounds HAA +
5% Diesel .0016 1873 114 24 50 pounds Silica F~our + 5%
Diesel .0011 25 2 0.4 50 pounds HM .0018 7853 478 100 None .0029 67 4 0.8 20 ~Based on control of 472 darcies.
Hydroxyacetic acid condensation product,8-10 micron particle size average, melting point 206~C

The process of this invention can effectively control fluid 25 loss in fracturing operations, and the degradation products (hydroxyacetic add monomer and dimer) of the fluid loss additive which are produced as a result of the formation conditions break the gel in the gel filter pad and essentially completely remove the gel filter pad with no permanent formation damage.
The hydroxyacetic condensation products can be utilized as 30 the sole fluid loss additive or in combination with other fluid loss additives such as silica flour or diesel fuel. It is only essential that the condensation products be degradable at formation condi!ions, and that they be used in an amount sufficient to substantially completely break the gel in the gel filter pad whichis formed during the fracturing treatment. The condensation products, as 35 shown in the aforementioned Bellis et al. application, can be tailored to suit the conditions in the formation to be fractured. The process eliminates the need for a separate gel breaker injection step. Often, a separately injected gel breaker only contracts a small fraction of the gel pad, resulUng in less than full restoration of well productivity or injectivity after the fracture treatment.

~7~ 1319~
Photomicrographs of proppant packs from the tests described above showed essentially complete removal of filter cake when 5 hydroxyacetic acid condensation product was used as the sole fluid loss additive, whereas significant impairment was visible in the run using silica tlour as the sole fluid loss additive. The presence of diesel fuel impedes the effectiveness of the degradation products to clean up the gel filter pad, but still a significant amount of gel damage was repaired. The ability of the lO hydroxyacetic acid condensation product, when used as the sole fluid loss additive, to return a proppant pack to 100% of its potential conductivity and permeability is indeed surprising.
The exact amount and type of additive for a particular fracturing treatment in accordance with the invention will depend on factors lS such as formation type and temperature, amount of fracturing desired, etc It is essential in carrying out the invention that a condensed hydroxyacetic acid product in the form of finely divided particles be incorporated in a treatment fluid in an amount sufficient (when combined with other fluid loss additives where applicable) to provide effective fluid loss properties to the fracturing fluid 20 and to provide suffficient degradation products in a reasonable time at formation conditions to restore formation conductivity and permeability by breaking the gel in the gel filter pad formed during the fracturing step.
Numerous modifications to and variations of the above described preferred embodiments will be apparent to those skilled in the art.
25 Such modifications and variations are intended to be included within the scope of the invention as defined by the appended claims.

Claims (8)

  1. Claim 1. In a process for fracturing a subterranean formation penetrated by a wellbore wherein a fracture treatment fluid comprising an aqueous gel is pumped down said wellbore and into said formation at formation fracturing pressure, wherein a fluid loss control material is included in said treatment fluid, and wherein a gel filter cake is formed on the surfaces of said wellbore and the fractures in said formation, the improvement comprising:
    utilizing as at least a part of said fluid loss control material a hydroxyacetic add condensation product, said condensation product being degradable at formation conditions whereby hydroxyacetic acid monomers and dimers are formed, and said condensation product being present in amount sufficient to provide enough degradation products including hydroxyacetic acid to react with and break the gel in said filter cake and to recover permeability in said formation and fractures without the necessity of adding a separate gel breaking material after formation of said gel filter cake.
  2. Claim 2. The process of Claim 1 wherein said gel is a hydroxypropylguar gel.
  3. Claim 3. The process of Claim 1 wherein said hydroxyacetic adid condensation product is a condensation product of hydroxyacetic acid with up to 15 weight percent condensing compounds containing other hydroxy-,carboxylic-add-, orhydroxycarboxylic acid moieties, said condensation product having a number average molecular weight of about 200 to 4000, being substantially crystalline at both ambient and wellbore temperatures and having a melting point and about 160°C or higher and sufficiently high to avoid softening or melting during use of being substantially insoluble in said wellbore fluid and degradable in the presence of water at elevated temperature to monomers and dimers which are at least partially soluble in oil or water.
  4. Claim 4. The process of Claim 3 wherein said aqueous gel is fully hydrated prior to being combined with said condensation product.
  5. Claim 5. The process of Claim 4 wherein said fracture treatment fluid further comprises silica flour
  6. Claim 6. The process of Claim 4 wherein said fracture treatment fluid further comprises diesel fuel in an amount of about five volume percent.
  7. Claim 7. The process of Claim 4 wherein said fluid loss control material consists essentially of said condensation product.
  8. Claim 8. The process of Claim 4 wherein said condensation product is added in an amount of at least 30 pounds per 1000 gallons of treatment fluid.
CA000601660A 1988-02-16 1989-06-02 Formation fracturing process Expired - Fee Related CA1319819C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US07/155,786 US4848467A (en) 1988-02-16 1988-02-16 Formation fracturing process
EP89305510A EP0401431A1 (en) 1988-02-16 1989-06-01 Formation fracturing process
CA000601660A CA1319819C (en) 1988-02-16 1989-06-02 Formation fracturing process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/155,786 US4848467A (en) 1988-02-16 1988-02-16 Formation fracturing process
CA000601660A CA1319819C (en) 1988-02-16 1989-06-02 Formation fracturing process

Publications (1)

Publication Number Publication Date
CA1319819C true CA1319819C (en) 1993-07-06

Family

ID=25672782

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000601660A Expired - Fee Related CA1319819C (en) 1988-02-16 1989-06-02 Formation fracturing process

Country Status (3)

Country Link
US (1) US4848467A (en)
EP (1) EP0401431A1 (en)
CA (1) CA1319819C (en)

Families Citing this family (190)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5246602A (en) * 1986-02-24 1993-09-21 Forrest Gabriel T Method and composition fracturing subterranean formations
US4957165A (en) * 1988-02-16 1990-09-18 Conoco Inc. Well treatment process
US4961466A (en) * 1989-01-23 1990-10-09 Halliburton Company Method for effecting controlled break in polysaccharide gels
US4986355A (en) * 1989-05-18 1991-01-22 Conoco Inc. Process for the preparation of fluid loss additive and gel breaker
US5103905A (en) * 1990-05-03 1992-04-14 Dowell Schlumberger Incorporated Method of optimizing the conductivity of a propped fractured formation
US5103913A (en) * 1990-12-12 1992-04-14 Dowell Schlumberger Incorporated Method of fracturing high temperature wells and fracturing fluid therefore
US5411093A (en) * 1993-12-10 1995-05-02 Mobil Oil Corporation Method of enhancing stimulation load fluid recovery
US6149344A (en) * 1997-10-04 2000-11-21 Master Corporation Acid gas disposal
US7276466B2 (en) * 2001-06-11 2007-10-02 Halliburton Energy Services, Inc. Compositions and methods for reducing the viscosity of a fluid
US7080688B2 (en) * 2003-08-14 2006-07-25 Halliburton Energy Services, Inc. Compositions and methods for degrading filter cake
US7140438B2 (en) * 2003-08-14 2006-11-28 Halliburton Energy Services, Inc. Orthoester compositions and methods of use in subterranean applications
US7168489B2 (en) * 2001-06-11 2007-01-30 Halliburton Energy Services, Inc. Orthoester compositions and methods for reducing the viscosified treatment fluids
US6795773B2 (en) * 2001-09-07 2004-09-21 Halliburton Energy Services, Inc. Well completion method, including integrated approach for fracture optimization
US7343973B2 (en) 2002-01-08 2008-03-18 Halliburton Energy Services, Inc. Methods of stabilizing surfaces of subterranean formations
US7267171B2 (en) 2002-01-08 2007-09-11 Halliburton Energy Services, Inc. Methods and compositions for stabilizing the surface of a subterranean formation
US7216711B2 (en) 2002-01-08 2007-05-15 Halliburton Eenrgy Services, Inc. Methods of coating resin and blending resin-coated proppant
US6691780B2 (en) 2002-04-18 2004-02-17 Halliburton Energy Services, Inc. Tracking of particulate flowback in subterranean wells
US7219731B2 (en) * 2002-08-26 2007-05-22 Schlumberger Technology Corporation Degradable additive for viscoelastic surfactant based fluid systems
US7677311B2 (en) * 2002-08-26 2010-03-16 Schlumberger Technology Corporation Internal breaker for oilfield treatments
US7066260B2 (en) * 2002-08-26 2006-06-27 Schlumberger Technology Corporation Dissolving filter cake
US7398826B2 (en) * 2003-11-14 2008-07-15 Schlumberger Technology Corporation Well treatment with dissolvable polymer
US20060058197A1 (en) * 2004-09-15 2006-03-16 Brown J E Selective fracture face dissolution
US20050113263A1 (en) * 2002-10-28 2005-05-26 Brown J. E. Differential etching in acid fracturing
DE60310978D1 (en) * 2002-10-28 2007-02-15 Schlumberger Technology Bv SELF-CREATED RENDER FILTER CAKE
US6981549B2 (en) * 2002-11-06 2006-01-03 Schlumberger Technology Corporation Hydraulic fracturing method
US7181380B2 (en) 2002-12-20 2007-02-20 Geomechanics International, Inc. System and process for optimal selection of hydrocarbon well completion type and design
US20040211561A1 (en) 2003-03-06 2004-10-28 Nguyen Philip D. Methods and compositions for consolidating proppant in fractures
US7114570B2 (en) 2003-04-07 2006-10-03 Halliburton Energy Services, Inc. Methods and compositions for stabilizing unconsolidated subterranean formations
US6978836B2 (en) 2003-05-23 2005-12-27 Halliburton Energy Services, Inc. Methods for controlling water and particulate production
US7114560B2 (en) 2003-06-23 2006-10-03 Halliburton Energy Services, Inc. Methods for enhancing treatment fluid placement in a subterranean formation
US7413010B2 (en) 2003-06-23 2008-08-19 Halliburton Energy Services, Inc. Remediation of subterranean formations using vibrational waves and consolidating agents
US6994166B2 (en) * 2003-06-24 2006-02-07 Baker Hughes Incorporated Composition and method for diversion agents for acid stimulation of subterranean formations
US7013976B2 (en) 2003-06-25 2006-03-21 Halliburton Energy Services, Inc. Compositions and methods for consolidating unconsolidated subterranean formations
US7178596B2 (en) * 2003-06-27 2007-02-20 Halliburton Energy Services, Inc. Methods for improving proppant pack permeability and fracture conductivity in a subterranean well
US7044220B2 (en) * 2003-06-27 2006-05-16 Halliburton Energy Services, Inc. Compositions and methods for improving proppant pack permeability and fracture conductivity in a subterranean well
US20050130848A1 (en) * 2003-06-27 2005-06-16 Halliburton Energy Services, Inc. Compositions and methods for improving fracture conductivity in a subterranean well
US7032663B2 (en) * 2003-06-27 2006-04-25 Halliburton Energy Services, Inc. Permeable cement and sand control methods utilizing permeable cement in subterranean well bores
US7044224B2 (en) * 2003-06-27 2006-05-16 Halliburton Energy Services, Inc. Permeable cement and methods of fracturing utilizing permeable cement in subterranean well bores
US7228904B2 (en) * 2003-06-27 2007-06-12 Halliburton Energy Services, Inc. Compositions and methods for improving fracture conductivity in a subterranean well
US7036587B2 (en) * 2003-06-27 2006-05-02 Halliburton Energy Services, Inc. Methods of diverting treating fluids in subterranean zones and degradable diverting materials
US7021379B2 (en) 2003-07-07 2006-04-04 Halliburton Energy Services, Inc. Methods and compositions for enhancing consolidation strength of proppant in subterranean fractures
US7066258B2 (en) 2003-07-08 2006-06-27 Halliburton Energy Services, Inc. Reduced-density proppants and methods of using reduced-density proppants to enhance their transport in well bores and fractures
US20050028976A1 (en) * 2003-08-05 2005-02-10 Nguyen Philip D. Compositions and methods for controlling the release of chemicals placed on particulates
US7497278B2 (en) 2003-08-14 2009-03-03 Halliburton Energy Services, Inc. Methods of degrading filter cakes in a subterranean formation
US8541051B2 (en) 2003-08-14 2013-09-24 Halliburton Energy Services, Inc. On-the fly coating of acid-releasing degradable material onto a particulate
US7059406B2 (en) 2003-08-26 2006-06-13 Halliburton Energy Services, Inc. Production-enhancing completion methods
US7017665B2 (en) 2003-08-26 2006-03-28 Halliburton Energy Services, Inc. Strengthening near well bore subterranean formations
US7156194B2 (en) 2003-08-26 2007-01-02 Halliburton Energy Services, Inc. Methods of drilling and consolidating subterranean formation particulate
US7237609B2 (en) 2003-08-26 2007-07-03 Halliburton Energy Services, Inc. Methods for producing fluids from acidized and consolidated portions of subterranean formations
US6997259B2 (en) 2003-09-05 2006-02-14 Halliburton Energy Services, Inc. Methods for forming a permeable and stable mass in a subterranean formation
US7032667B2 (en) 2003-09-10 2006-04-25 Halliburtonn Energy Services, Inc. Methods for enhancing the consolidation strength of resin coated particulates
US7021377B2 (en) * 2003-09-11 2006-04-04 Halliburton Energy Services, Inc. Methods of removing filter cake from well producing zones
US7829507B2 (en) 2003-09-17 2010-11-09 Halliburton Energy Services Inc. Subterranean treatment fluids comprising a degradable bridging agent and methods of treating subterranean formations
US7674753B2 (en) 2003-09-17 2010-03-09 Halliburton Energy Services, Inc. Treatment fluids and methods of forming degradable filter cakes comprising aliphatic polyester and their use in subterranean formations
US7833944B2 (en) 2003-09-17 2010-11-16 Halliburton Energy Services, Inc. Methods and compositions using crosslinked aliphatic polyesters in well bore applications
US7345011B2 (en) 2003-10-14 2008-03-18 Halliburton Energy Services, Inc. Methods for mitigating the production of water from subterranean formations
US7063150B2 (en) 2003-11-25 2006-06-20 Halliburton Energy Services, Inc. Methods for preparing slurries of coated particulates
US7195068B2 (en) 2003-12-15 2007-03-27 Halliburton Energy Services, Inc. Filter cake degradation compositions and methods of use in subterranean operations
US7131493B2 (en) 2004-01-16 2006-11-07 Halliburton Energy Services, Inc. Methods of using sealants in multilateral junctions
US7096947B2 (en) * 2004-01-27 2006-08-29 Halliburton Energy Services, Inc. Fluid loss control additives for use in fracturing subterranean formations
US7156174B2 (en) * 2004-01-30 2007-01-02 Halliburton Energy Services, Inc. Contained micro-particles for use in well bore operations
US7036586B2 (en) * 2004-01-30 2006-05-02 Halliburton Energy Services, Inc. Methods of cementing in subterranean formations using crack resistant cement compositions
US7204312B2 (en) * 2004-01-30 2007-04-17 Halliburton Energy Services, Inc. Compositions and methods for the delivery of chemical components in subterranean well bores
US20050173116A1 (en) 2004-02-10 2005-08-11 Nguyen Philip D. Resin compositions and methods of using resin compositions to control proppant flow-back
US20050183741A1 (en) * 2004-02-20 2005-08-25 Surjaatmadja Jim B. Methods of cleaning and cutting using jetted fluids
US7211547B2 (en) 2004-03-03 2007-05-01 Halliburton Energy Services, Inc. Resin compositions and methods of using such resin compositions in subterranean applications
US7063151B2 (en) 2004-03-05 2006-06-20 Halliburton Energy Services, Inc. Methods of preparing and using coated particulates
US7172022B2 (en) * 2004-03-17 2007-02-06 Halliburton Energy Services, Inc. Cement compositions containing degradable materials and methods of cementing in subterranean formations
US7093664B2 (en) * 2004-03-18 2006-08-22 Halliburton Energy Services, Inc. One-time use composite tool formed of fibers and a biodegradable resin
US7353879B2 (en) * 2004-03-18 2008-04-08 Halliburton Energy Services, Inc. Biodegradable downhole tools
GB2412391A (en) * 2004-03-27 2005-09-28 Cleansorb Ltd Process for disruption of filter cakes
US7299875B2 (en) 2004-06-08 2007-11-27 Halliburton Energy Services, Inc. Methods for controlling particulate migration
US7073581B2 (en) 2004-06-15 2006-07-11 Halliburton Energy Services, Inc. Electroconductive proppant compositions and related methods
US7547665B2 (en) 2005-04-29 2009-06-16 Halliburton Energy Services, Inc. Acidic treatment fluids comprising scleroglucan and/or diutan and associated methods
US7621334B2 (en) 2005-04-29 2009-11-24 Halliburton Energy Services, Inc. Acidic treatment fluids comprising scleroglucan and/or diutan and associated methods
US7475728B2 (en) 2004-07-23 2009-01-13 Halliburton Energy Services, Inc. Treatment fluids and methods of use in subterranean formations
US20060032633A1 (en) * 2004-08-10 2006-02-16 Nguyen Philip D Methods and compositions for carrier fluids comprising water-absorbent fibers
US7775278B2 (en) * 2004-09-01 2010-08-17 Schlumberger Technology Corporation Degradable material assisted diversion or isolation
US7275596B2 (en) * 2005-06-20 2007-10-02 Schlumberger Technology Corporation Method of using degradable fiber systems for stimulation
US7299869B2 (en) * 2004-09-03 2007-11-27 Halliburton Energy Services, Inc. Carbon foam particulates and methods of using carbon foam particulates in subterranean applications
US7255169B2 (en) 2004-09-09 2007-08-14 Halliburton Energy Services, Inc. Methods of creating high porosity propped fractures
US7281580B2 (en) 2004-09-09 2007-10-16 Halliburton Energy Services, Inc. High porosity fractures and methods of creating high porosity fractures
US20060054325A1 (en) * 2004-09-15 2006-03-16 Brown J E Solid sandstone dissolver
US7413017B2 (en) 2004-09-24 2008-08-19 Halliburton Energy Services, Inc. Methods and compositions for inducing tip screenouts in frac-packing operations
US7757768B2 (en) 2004-10-08 2010-07-20 Halliburton Energy Services, Inc. Method and composition for enhancing coverage and displacement of treatment fluids into subterranean formations
US7553800B2 (en) 2004-11-17 2009-06-30 Halliburton Energy Services, Inc. In-situ filter cake degradation compositions and methods of use in subterranean formations
US7648946B2 (en) 2004-11-17 2010-01-19 Halliburton Energy Services, Inc. Methods of degrading filter cakes in subterranean formations
US7281581B2 (en) 2004-12-01 2007-10-16 Halliburton Energy Services, Inc. Methods of hydraulic fracturing and of propping fractures in subterranean formations
US7273099B2 (en) 2004-12-03 2007-09-25 Halliburton Energy Services, Inc. Methods of stimulating a subterranean formation comprising multiple production intervals
US7883740B2 (en) 2004-12-12 2011-02-08 Halliburton Energy Services, Inc. Low-quality particulates and methods of making and using improved low-quality particulates
GB2422839B (en) * 2005-01-11 2009-06-24 Schlumberger Holdings Degradable polymers for wellbore fluids and processes
US7334635B2 (en) 2005-01-14 2008-02-26 Halliburton Energy Services, Inc. Methods for fracturing subterranean wells
US8030249B2 (en) 2005-01-28 2011-10-04 Halliburton Energy Services, Inc. Methods and compositions relating to the hydrolysis of water-hydrolysable materials
US20060169182A1 (en) 2005-01-28 2006-08-03 Halliburton Energy Services, Inc. Methods and compositions relating to the hydrolysis of water-hydrolysable materials
US20080009423A1 (en) 2005-01-31 2008-01-10 Halliburton Energy Services, Inc. Self-degrading fibers and associated methods of use and manufacture
US7267170B2 (en) * 2005-01-31 2007-09-11 Halliburton Energy Services, Inc. Self-degrading fibers and associated methods of use and manufacture
US7497258B2 (en) 2005-02-01 2009-03-03 Halliburton Energy Services, Inc. Methods of isolating zones in subterranean formations using self-degrading cement compositions
US7353876B2 (en) 2005-02-01 2008-04-08 Halliburton Energy Services, Inc. Self-degrading cement compositions and methods of using self-degrading cement compositions in subterranean formations
US8598092B2 (en) 2005-02-02 2013-12-03 Halliburton Energy Services, Inc. Methods of preparing degradable materials and methods of use in subterranean formations
US7334636B2 (en) 2005-02-08 2008-02-26 Halliburton Energy Services, Inc. Methods of creating high-porosity propped fractures using reticulated foam
US7506689B2 (en) 2005-02-22 2009-03-24 Halliburton Energy Services, Inc. Fracturing fluids comprising degradable diverting agents and methods of use in subterranean formations
US7216705B2 (en) * 2005-02-22 2007-05-15 Halliburton Energy Services, Inc. Methods of placing treatment chemicals
US7318473B2 (en) 2005-03-07 2008-01-15 Halliburton Energy Services, Inc. Methods relating to maintaining the structural integrity of deviated well bores
US7673686B2 (en) 2005-03-29 2010-03-09 Halliburton Energy Services, Inc. Method of stabilizing unconsolidated formation for sand control
US7662753B2 (en) 2005-05-12 2010-02-16 Halliburton Energy Services, Inc. Degradable surfactants and methods for use
US7608567B2 (en) 2005-05-12 2009-10-27 Halliburton Energy Services, Inc. Degradable surfactants and methods for use
US7677315B2 (en) 2005-05-12 2010-03-16 Halliburton Energy Services, Inc. Degradable surfactants and methods for use
US7337839B2 (en) * 2005-06-10 2008-03-04 Schlumberger Technology Corporation Fluid loss additive for enhanced fracture clean-up
US7318474B2 (en) 2005-07-11 2008-01-15 Halliburton Energy Services, Inc. Methods and compositions for controlling formation fines and reducing proppant flow-back
US7484564B2 (en) 2005-08-16 2009-02-03 Halliburton Energy Services, Inc. Delayed tackifying compositions and associated methods involving controlling particulate migration
US7595280B2 (en) 2005-08-16 2009-09-29 Halliburton Energy Services, Inc. Delayed tackifying compositions and associated methods involving controlling particulate migration
US8230936B2 (en) * 2005-08-31 2012-07-31 Schlumberger Technology Corporation Methods of forming acid particle based packers for wellbores
US7713916B2 (en) 2005-09-22 2010-05-11 Halliburton Energy Services, Inc. Orthoester-based surfactants and associated methods
US7461697B2 (en) 2005-11-21 2008-12-09 Halliburton Energy Services, Inc. Methods of modifying particulate surfaces to affect acidic sites thereon
US9034806B2 (en) 2005-12-05 2015-05-19 Schlumberger Technology Corporation Viscoelastic surfactant rheology modification
US20070173416A1 (en) 2006-01-20 2007-07-26 Halliburton Energy Services, Inc. Well treatment compositions for use in acidizing a well
US7926591B2 (en) 2006-02-10 2011-04-19 Halliburton Energy Services, Inc. Aqueous-based emulsified consolidating agents suitable for use in drill-in applications
US8613320B2 (en) 2006-02-10 2013-12-24 Halliburton Energy Services, Inc. Compositions and applications of resins in treating subterranean formations
US7819192B2 (en) 2006-02-10 2010-10-26 Halliburton Energy Services, Inc. Consolidating agent emulsions and associated methods
US7665517B2 (en) 2006-02-15 2010-02-23 Halliburton Energy Services, Inc. Methods of cleaning sand control screens and gravel packs
US7407010B2 (en) 2006-03-16 2008-08-05 Halliburton Energy Services, Inc. Methods of coating particulates
US7608566B2 (en) 2006-03-30 2009-10-27 Halliburton Energy Services, Inc. Degradable particulates as friction reducers for the flow of solid particulates and associated methods of use
US7237610B1 (en) 2006-03-30 2007-07-03 Halliburton Energy Services, Inc. Degradable particulates as friction reducers for the flow of solid particulates and associated methods of use
US7691789B2 (en) * 2006-03-31 2010-04-06 Schlumberger Technology Corporation Self-cleaning well control fluid
US20070284114A1 (en) * 2006-06-08 2007-12-13 Halliburton Energy Services, Inc. Method for removing a consumable downhole tool
US20080257549A1 (en) 2006-06-08 2008-10-23 Halliburton Energy Services, Inc. Consumable Downhole Tools
US7798224B2 (en) 2006-07-03 2010-09-21 Schlumberger Technology Corporation Rheology controlled heterogeneous particle placement in hydraulic fracturing
US7500521B2 (en) * 2006-07-06 2009-03-10 Halliburton Energy Services, Inc. Methods of enhancing uniform placement of a resin in a subterranean formation
US7591318B2 (en) 2006-07-20 2009-09-22 Halliburton Energy Services, Inc. Method for removing a sealing plug from a well
US8329621B2 (en) 2006-07-25 2012-12-11 Halliburton Energy Services, Inc. Degradable particulates and associated methods
US8481462B2 (en) * 2006-09-18 2013-07-09 Schlumberger Technology Corporation Oxidative internal breaker system with breaking activators for viscoelastic surfactant fluids
US7635028B2 (en) 2006-09-18 2009-12-22 Schlumberger Technology Corporation Acidic internal breaker for viscoelastic surfactant fluids in brine
US7678742B2 (en) 2006-09-20 2010-03-16 Halliburton Energy Services, Inc. Drill-in fluids and associated methods
US7687438B2 (en) 2006-09-20 2010-03-30 Halliburton Energy Services, Inc. Drill-in fluids and associated methods
US7678743B2 (en) 2006-09-20 2010-03-16 Halliburton Energy Services, Inc. Drill-in fluids and associated methods
US7455112B2 (en) 2006-09-29 2008-11-25 Halliburton Energy Services, Inc. Methods and compositions relating to the control of the rates of acid-generating compounds in acidizing operations
US9120963B2 (en) * 2006-11-08 2015-09-01 Schlumberger Technology Corporation Delayed water-swelling materials and methods of use
US7686080B2 (en) 2006-11-09 2010-03-30 Halliburton Energy Services, Inc. Acid-generating fluid loss control additives and associated methods
US8163826B2 (en) 2006-11-21 2012-04-24 Schlumberger Technology Corporation Polymeric acid precursor compositions and methods
US7786051B2 (en) * 2006-12-07 2010-08-31 Schlumberger Technology Corporation Method of preventing or reducing fluid loss in subterranean formations
US8757259B2 (en) 2006-12-08 2014-06-24 Schlumberger Technology Corporation Heterogeneous proppant placement in a fracture with removable channelant fill
US7581590B2 (en) 2006-12-08 2009-09-01 Schlumberger Technology Corporation Heterogeneous proppant placement in a fracture with removable channelant fill
US8763699B2 (en) * 2006-12-08 2014-07-01 Schlumberger Technology Corporation Heterogeneous proppant placement in a fracture with removable channelant fill
US9085727B2 (en) 2006-12-08 2015-07-21 Schlumberger Technology Corporation Heterogeneous proppant placement in a fracture with removable extrametrical material fill
US7998908B2 (en) 2006-12-12 2011-08-16 Schlumberger Technology Corporation Fluid loss control and well cleanup methods
US8220548B2 (en) 2007-01-12 2012-07-17 Halliburton Energy Services Inc. Surfactant wash treatment fluids and associated methods
RU2347069C2 (en) * 2007-02-13 2009-02-20 Шлюмбергер Текнолоджи Б.В. Created fracture cleaning process
US20080202764A1 (en) 2007-02-22 2008-08-28 Halliburton Energy Services, Inc. Consumable downhole tools
US8695708B2 (en) * 2007-03-26 2014-04-15 Schlumberger Technology Corporation Method for treating subterranean formation with degradable material
US10011763B2 (en) 2007-07-25 2018-07-03 Schlumberger Technology Corporation Methods to deliver fluids on a well site with variable solids concentration from solid slurries
US9040468B2 (en) 2007-07-25 2015-05-26 Schlumberger Technology Corporation Hydrolyzable particle compositions, treatment fluids and methods
US9080440B2 (en) 2007-07-25 2015-07-14 Schlumberger Technology Corporation Proppant pillar placement in a fracture with high solid content fluid
US8490699B2 (en) * 2007-07-25 2013-07-23 Schlumberger Technology Corporation High solids content slurry methods
US20090105097A1 (en) * 2007-10-22 2009-04-23 Carlos Abad Degradable Friction Reducer
US8839865B2 (en) * 2008-02-27 2014-09-23 Schlumberger Technology Corporation Slip-layer fluid placement
US8235102B1 (en) 2008-03-26 2012-08-07 Robertson Intellectual Properties, LLC Consumable downhole tool
US8327926B2 (en) 2008-03-26 2012-12-11 Robertson Intellectual Properties, LLC Method for removing a consumable downhole tool
US20090247430A1 (en) * 2008-03-28 2009-10-01 Diankui Fu Elongated particle breakers in low pH fracturing fluids
US8006760B2 (en) 2008-04-10 2011-08-30 Halliburton Energy Services, Inc. Clean fluid systems for partial monolayer fracturing
US7906464B2 (en) * 2008-05-13 2011-03-15 Halliburton Energy Services, Inc. Compositions and methods for the removal of oil-based filtercakes
WO2010001323A1 (en) * 2008-07-01 2010-01-07 Schlumberger Canada Limited System, method, and apparatus for injection well clean-up operations
US7981845B2 (en) * 2008-08-29 2011-07-19 Schlumberger Technology Corporation Partially neutralized polyhydroxy acids for well treatments
US7833943B2 (en) * 2008-09-26 2010-11-16 Halliburton Energy Services Inc. Microemulsifiers and methods of making and using same
US8016040B2 (en) * 2008-11-26 2011-09-13 Schlumberger Technology Corporation Fluid loss control
US7998910B2 (en) 2009-02-24 2011-08-16 Halliburton Energy Services, Inc. Treatment fluids comprising relative permeability modifiers and methods of use
US9139759B2 (en) * 2009-04-02 2015-09-22 Schlumberger Technology Corporation Method of treating a subterranean formation with combined breaker and fluid loss additive
US8082992B2 (en) 2009-07-13 2011-12-27 Halliburton Energy Services, Inc. Methods of fluid-controlled geometry stimulation
US8662172B2 (en) 2010-04-12 2014-03-04 Schlumberger Technology Corporation Methods to gravel pack a well using expanding materials
US9441447B2 (en) 2010-06-18 2016-09-13 Schlumberger Technology Corporation Method of isolating a wellbore with solid acid for fracturing
US8714256B2 (en) 2010-06-18 2014-05-06 Schlumberger Technology Corporation Method of isolating a wellbore with solid acid for fracturing
US8511381B2 (en) 2010-06-30 2013-08-20 Schlumberger Technology Corporation High solids content slurry methods and systems
US8607870B2 (en) 2010-11-19 2013-12-17 Schlumberger Technology Corporation Methods to create high conductivity fractures that connect hydraulic fracture networks in a well
US8905133B2 (en) 2011-05-11 2014-12-09 Schlumberger Technology Corporation Methods of zonal isolation and treatment diversion
US10808497B2 (en) 2011-05-11 2020-10-20 Schlumberger Technology Corporation Methods of zonal isolation and treatment diversion
US20120305247A1 (en) 2011-06-06 2012-12-06 Yiyan Chen Proppant pillar placement in a fracture with high solid content fluid
US9133387B2 (en) 2011-06-06 2015-09-15 Schlumberger Technology Corporation Methods to improve stability of high solid content fluid
US9863230B2 (en) 2011-06-15 2018-01-09 Schlumberger Technology Corporation Heterogeneous proppant placement in a fracture with removable extrametrical material fill
US9863228B2 (en) 2012-03-08 2018-01-09 Schlumberger Technology Corporation System and method for delivering treatment fluid
US9803457B2 (en) 2012-03-08 2017-10-31 Schlumberger Technology Corporation System and method for delivering treatment fluid
US9528354B2 (en) 2012-11-14 2016-12-27 Schlumberger Technology Corporation Downhole tool positioning system and method
US9388335B2 (en) 2013-07-25 2016-07-12 Schlumberger Technology Corporation Pickering emulsion treatment fluid
US9951265B2 (en) 2014-06-17 2018-04-24 Chevron U.S.A. Inc. System and methods to deliver energy downhole
US10001613B2 (en) 2014-07-22 2018-06-19 Schlumberger Technology Corporation Methods and cables for use in fracturing zones in a well
US10738577B2 (en) 2014-07-22 2020-08-11 Schlumberger Technology Corporation Methods and cables for use in fracturing zones in a well
MX2017004433A (en) 2014-10-06 2017-10-23 Schlumberger Technology Bv Methods of zonal isolation and treatment diversion with shaped particles.
CA2967936C (en) 2014-11-14 2023-10-31 Schlumberger Canada Limited Well treatments for diversion or zonal isolation
US10030471B2 (en) 2015-07-02 2018-07-24 Schlumberger Technology Corporation Well treatment
WO2017151694A1 (en) 2016-03-01 2017-09-08 Schlumberger Technology Corporation Well treatment methods
US10301903B2 (en) 2016-05-16 2019-05-28 Schlumberger Technology Corporation Well treatment
CA3082801A1 (en) 2017-11-28 2019-06-06 Ecolab Usa Inc. Fluid diversion composition in well stimulation

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3868998A (en) * 1974-05-15 1975-03-04 Shell Oil Co Self-acidifying treating fluid positioning process
US3960736A (en) * 1974-06-03 1976-06-01 The Dow Chemical Company Self-breaking viscous aqueous solutions and the use thereof in fracturing subterranean formations
US4343363A (en) * 1981-01-02 1982-08-10 Marathon Oil Company Process for cleaning a subterranean injection surface and for selectively reducing the permeability of a subterranean formation
US4526695A (en) * 1981-08-10 1985-07-02 Exxon Production Research Co. Composition for reducing the permeability of subterranean formations
US4387769A (en) * 1981-08-10 1983-06-14 Exxon Production Research Co. Method for reducing the permeability of subterranean formations
US4470915A (en) * 1982-09-27 1984-09-11 Halliburton Company Method and compositions for fracturing subterranean formations
US4541485A (en) * 1983-06-24 1985-09-17 W. R. Grace & Co. Completion and workover fluid
US4715967A (en) * 1985-12-27 1987-12-29 E. I. Du Pont De Nemours And Company Composition and method for temporarily reducing permeability of subterranean formations
US4657081A (en) * 1986-02-19 1987-04-14 Dowell Schlumberger Incorporated Hydraulic fracturing method using delayed crosslinker composition

Also Published As

Publication number Publication date
EP0401431A1 (en) 1990-12-12
US4848467A (en) 1989-07-18

Similar Documents

Publication Publication Date Title
CA1319819C (en) Formation fracturing process
EP0404489B1 (en) Well treatment process
US4986355A (en) Process for the preparation of fluid loss additive and gel breaker
US6017855A (en) Polymer expansion for oil and gas recovery
US4137182A (en) Process for fracturing well formations using aqueous gels
US4526695A (en) Composition for reducing the permeability of subterranean formations
CA1197978A (en) Composition and method for reducing the permeability of subterranean formations
US5226479A (en) Fracturing fluid having a delayed enzyme breaker
US5007481A (en) Method of treating subterranean formations using a non-damaging fracturing fluid
US4961466A (en) Method for effecting controlled break in polysaccharide gels
US4715967A (en) Composition and method for temporarily reducing permeability of subterranean formations
US4964466A (en) Hydraulic fracturing with chlorine dioxide cleanup
CA1246852A (en) Aqueous acid gels and use thereof
US20090114390A1 (en) High temperature aqueous-based zirconium crosslinking composition and use
US4193453A (en) Method for consolidating sand or water control in subterranean formations
US7347265B2 (en) Method of forming temporary blocking gel containing guar derivative
US5393439A (en) Periodate fracturing fluid viscosity breakers
US6649572B2 (en) Polymer expansion for oil and gas recovery
US20080190610A1 (en) Fracture Clean up Method
WO2010044059A1 (en) Self-viscosifying and self-breaking gels
WO1995010688A1 (en) High viscosity cross-linked gelled alcohol
US4828030A (en) Viscous oil recovery by removing fines
US4848464A (en) Method to improve use of polymers for injectivity profile control in enhanced oil recovery
US5307874A (en) Method for treating formations with gelatin
NO178473B (en) Method of fracturing a subterranean formation

Legal Events

Date Code Title Description
MKLA Lapsed