CN102643631B - Method for preparing impervious filtrate reducer for drilling fluid from furfural residue and xylose residue - Google Patents
Method for preparing impervious filtrate reducer for drilling fluid from furfural residue and xylose residue Download PDFInfo
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- CN102643631B CN102643631B CN 201210120698 CN201210120698A CN102643631B CN 102643631 B CN102643631 B CN 102643631B CN 201210120698 CN201210120698 CN 201210120698 CN 201210120698 A CN201210120698 A CN 201210120698A CN 102643631 B CN102643631 B CN 102643631B
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Abstract
The invention discloses a method for preparing an impervious filtrate reducer for drilling fluid from low-cost furfural residue and xylose residue, to obviously reduce preparation cost. The method comprises the steps of adding barium hydroxide aqueous solution 10-50 Kg to wet furfural residue and xylose residue 1 ton (on dry basis), mixing, drying, grinding, and sieving with 20 mesh sieve to obtain component A; selecting water-soluble polymer substance capable of passing 20 mesh sieve or finer sieve as component B; and mixing component A and component B to obtain the impervious filtrate reducer for drilling fluid. An preferable weight ratio of the component A and the component B is (55-95):(5-45).
Description
Technical field
The present invention relates to the chemical assistant field for oil-gas field, relate to the field that utilizes of agriculture and forest chemical industry tankage simultaneously.Be specifically related to a kind of agriculture and forest chemical industry tankage that utilize for the preparation of the method for the impervious fluid loss additive of preparation ultra-low penetration drilling fluid.
Background technology
In the oil gas well drilling process, for the stability of keeping the borehole wall, prevent slump in and make size of the hole as much as possible rule evenly require to prevent as far as possible that drilling well night is to stratum infiltration leak-off even leakage; Stoping drilling fluid then is the basic demand of protection reservoir to reservoir formation leakage and leak-off.Therefore, has a common task in anti-collapse, leakproof and these engineering objectives of protection reservoir: must take all technique means to stop wellbore fluids to enter the borehole wall or stratum.At present, during the open hole section under the positive pressure differential condition crept into, for porosity height, stratum that rate of permeation is high, the technological method that stops wellbore fluids to enter the borehole wall or stratum mainly was plugging method.
Fluid loss agent is water retaining again, is at the term at least 60 years of drilling technique field use, is referred to as traditional fluid loss agent here for fear of obscuring of term.The tradition fluid loss agent generally is used for creeping into the stratum of low porosity and rate of permeation, and its performance detection is filtration medium with filter paper; Filter paper the channel diameter scope narrower, most scopes at the 0.5-5 micron.Impervious fluid loss additive also can be described as does not have the infiltration fluid loss agent, is the term that just occurs the nearly more than ten years, and impervious fluid loss additive generally is used for creeping into the stratum of high porosity and high permeability, and its performance detection is filtration medium with the casting bed; The channel diameter scope of casting bed is very wide, most scopes at the 10-200 micron.So the shutoff of casting bed need be used the granulated material of a part of particle diameter more than tens of microns, and the shutoff of filter paper only needs to use the granulated material of a part of particle diameter about 1 micron; Clay particle in the drilling fluid just is suitable for shutoff filter paper duct.Be added with the bentonite suspension of impervious fluid loss additive, can form fine and close plugged zone at casting bed duct superficial part, to such an extent as to the moisture of suspension is difficult to this plugged zone of infiltrate; And the bentonite suspension that is added with traditional fluid loss agent can not form fine and close plugged zone at casting bed duct superficial part, to such an extent as to its suspension moisture enters deep, casting bed duct or passing hole channel leaks out.
The most normal principle of following of the technology in shutoff formation pore, crack comprises the stack of three kinds of effects: first kind of effect be rigid particles (as clay, calcium carbonate, barite etc.) near the entrance in hole, crack mutually the crowded size that forms significantly less than the fine porosity of formation pore, flaw size; Flexible particle is clamp-oned and is rested in these fine porositys under pressure reduction promotes, and pore dimension is further dwindled; Size significantly less than the water-soluble polymer of flexible particle be filled between the adjacent flexible particle, in the minim gap between flexible particle and the rigid particles.These three kinds effect stacks just can form the plugged zone of fine and close ultra-low penetration near the entrance in hole, crack.
Application number is that 200710014322.1 Chinese patent application proposes a kind of drilling well impervious fluid loss additive: lignocellulose is crushed to 0.074mm(can be described as superfine wood fiber), mix by the certain mass ratio with silicon powder, urethane powder then and namely obtain impervious fluid loss additive for petroleum well drilling.Wherein superfine wood fiber and urethane powder belong to the temporary shielding blocking that distortion deliquescing performance is arranged.
Southwest Petrol University thanks to refined strong master and learns articles and opinions literary composition " research of ultra-low penetration drilling fluid " (in April, 2006) and synthesized terpolymer AM/DMAAC/AANa with parents' structure (being called for short XG), as the temporary shielding blocking that distortion deliquescing performance is arranged.
By the preparation with impervious fluid loss additive of the existing preparation drilling fluid of above-mentioned two pieces of documents representative, need to use superfine wood fiber powder, urethane or other expensive polymkeric substance, so cost is higher.The objective of the invention is to select for use the agriculture and forest chemical industry tankage with superfine fibre shape structure to prepare the drilling fluid impervious fluid loss additive, reach the practicality effect of remarkable reduction preparation cost.
Summary of the invention
Technical scheme of the present invention is to adopt furfural dregs, xylose residue as the temporary shielding blocking that distortion deliquescing performance is arranged, and prepares impervious fluid loss additive cheaply.
Furfural dregs, xylose residue be corn cob, cotton seed hulls, bagasse etc. are contained hemicellulose agricultural byproduct in the presence of sulfuric acid thermal degradation, extract remaining solid tankage after furfural, the wood sugar, main component is Mierocrystalline cellulose and xylogen.Artificial add acid, thermal degradation effect, destroyed exist in the raw material intert the bonding imporosity that constitutes mutually by natural polymers such as Mierocrystalline cellulose, xylogen and hemicelluloses, so the granule strength of furfural dregs, xylose residue significantly is lower than the granule strength of its raw material (corn cob, cotton seed hulls, bagasse etc.); Come comparison from being crushed to the energy that identical fineness consumes, the pulverizing institute energy requirement of furfural dregs, xylose residue is more much lower than the pulverizing institute energy requirement of its raw material.In order to narrate conveniently, the present invention is referred to as the acidolysis slag to furfural dregs, xylose residue.
The present invention is based on the These characteristics of acidolysis slag, imagination and verification experimental verification its powder particle in drilling fluid, have distortion deliquescing performance behind the water absorption and swelling, therefore with it as temporary shielding blocking, prepare impervious fluid loss additive cheaply.
In view of there being a large amount of clays can play rigid particles in the general drilling fluid, get final product so only need contain flexible particle and water-soluble high-molecular substance when preparing impervious fluid loss additive by the inventive method; Described flexible particle is furfural dregs, xylose residue; Described water-soluble polymer takes from water-soluble cellulose derivative, water soluble starch derivative, guar gum, sesbania gum, with acrylic monomer homopolymerization or copolymerization gained polymer substance.Described water-soluble high-molecular substance can be used as traditional fluid loss agent, and utilizing water-soluble high-molecular substance to prepare impervious fluid loss additive is not innovation of the present invention, is only innovation of the present invention and utilize furfural dregs, xylose residue to prepare impervious fluid loss additive.
Embodiment
Embodiment 1
Furfural dregs, xylose residue generally contain remaining sulfuric acid, and drilling fluid additive should be neutral or the material of meta-alkalescence a little, thus method of the present invention be, for from the moisture wet slag furfural production plant, high, get its 100g, air-dry back gained solid is called dried slag; Add the aqueous solution that contains hydrated barta 10-50 kilogram then in the wet slag that whenever contains 1 ton of dried slag, mix, pulverized 20 mesh sieves after the drying, during gained powder material abbreviates as hereinafter and furfural dregs; According to said method to wet xylose residue neutralize, dry, pulverize gained powder material then abbreviate as in and xylose residue.In order to prepare impervious fluid loss additive.
In getting by mass ratio and 70 parts of furfural dregs, 30 parts of sodium starch glycolatees mix and are impervious fluid loss additive.Its sealing characteristics is tested as follows:
The first step: be mixed with the base slurry with 24 gram sodium bentonites and 400 cubic centimetres of water, add 12 grams by the impervious fluid loss additive of the inventive method preparation in this base slurry, high-speed stirring 10 minutes becomes drilling fluid to be tested;
Second step: the FA type with the sensible company production already of Beijing road does not have infiltration wellbore liquid leaching loss instrument (visual husky bed), there is screen cloth drilling fluid cup that its tubular can be had an X-rayed bottom and without filter paper, the dry sand of 350 cubic centimetres 20 orders～40 orders is placed on the screen cloth, add 350 cubic centimetres of drilling fluids to be tested again, tighten bowl cover, connect source of the gas pressure is transferred to 0.69Mpa, open purging valve, source of the gas enters in the drilling fluid cup, starts stopwatch;
The 3rd step: see through cup and observe drilling fluid infiltration situation.The liquid volume that the record stopwatch oozes out in full 30 minutes; If in full 30 minutes of the stopwatch still absence of liquid ooze out, then record the degree of depth that filtrate is invaded casting bed.
The prepared impervious fluid loss additive of embodiment 1 in full 30 minutes of stopwatch still absence of liquid ooze out, the degree of depth that filtrate is invaded casting bed is 7mm.
Embodiment 2
In getting by mass ratio and 70 parts of xylose residues, 30 parts of poly hydrolyzates mix and are impervious fluid loss additive.Its sealing characteristics is tested by embodiment 1 described method, and still absence of liquid is oozed out in full 30 minutes of test, and the degree of depth that filtrate is invaded casting bed is 9mm.
Embodiment 3
In getting by mass ratio and 60 parts of furfural dregs, in and 15 parts of xylose residues, viscosity-average molecular weight is 25 parts of 120,000 polyacrylamides, mixes and is impervious fluid loss additive.Its sealing characteristics is tested by embodiment 1 described method, and still absence of liquid is oozed out in full 30 minutes of test, and the degree of depth that filtrate is invaded casting bed is 12mm.
Embodiment 4
In getting by mass ratio and 15 parts of furfural dregs, in and 60 parts of xylose residues, 25 parts of Xylo-Mucines mix and are impervious fluid loss additive.Its sealing characteristics is tested by embodiment 1 described method, and still absence of liquid is oozed out in full 30 minutes of test, and the degree of depth that filtrate is invaded casting bed is 8mm.
Above-described embodiment is used for the explanation to claim, but is not for limitations on the claims, and protection scope of the present invention is as the criterion with claims.
Claims (2)
1. a drilling fluid impervious fluid loss additive is characterized in that: add the aqueous solution that contains hydrated barta 10-50 kilogram in the wet acidolysis slag that whenever contains 1 ton of dried slag, mix, pulverized 20 mesh sieves after the drying, as component A; Got 20 mesh sieves or thinner water-soluble high-molecular substance as B component; In proportion component A and B component are mixed and namely get the drilling fluid impervious fluid loss additive; Used acidolysis slag is that the heat treated plant material is produced furfural or wood sugar and the furfural dregs or the xylose residue that form in the presence of sulfuric acid, or both mixtures; Described ratio is to account for the umber that 55-95 part, B component accounts for by mass fraction component A to equal to deduct the umber that component A accounts for from 100.
2. drilling fluid impervious fluid loss additive as claimed in claim 1, it is characterized in that: used water-soluble high-molecular substance is taken from following material: water-soluble cellulose derivative, water soluble starch derivative, guar gum, sesbania gum, polyacrylate, polyacrylamide, contain the multipolymer of vinylformic acid chain link.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210120698 CN102643631B (en) | 2012-04-24 | 2012-04-24 | Method for preparing impervious filtrate reducer for drilling fluid from furfural residue and xylose residue |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210120698 CN102643631B (en) | 2012-04-24 | 2012-04-24 | Method for preparing impervious filtrate reducer for drilling fluid from furfural residue and xylose residue |
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| CN102643631A CN102643631A (en) | 2012-08-22 |
| CN102643631B true CN102643631B (en) | 2013-10-02 |
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| CN104962249A (en) * | 2015-07-31 | 2015-10-07 | 山东盛海科贸有限公司 | Load-bearing plugging agent for land drilling fluids and application method thereof |
| CN115247053B (en) * | 2021-04-27 | 2023-09-19 | 中石化石油工程技术服务有限公司 | Preparation method of enzymatic hydrolysis xylose residue and biomass synthetic resin filtrate reducer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5916849A (en) * | 1998-07-24 | 1999-06-29 | Venture Innovations, Inc. | Polysaccharide-containing well drilling and servicing fluids |
| CN102177217A (en) * | 2008-08-08 | 2011-09-07 | 哈利伯顿能源服务公司 | Improved fluid loss compositions and methods of use for subterranean operations |
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2012
- 2012-04-24 CN CN 201210120698 patent/CN102643631B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5916849A (en) * | 1998-07-24 | 1999-06-29 | Venture Innovations, Inc. | Polysaccharide-containing well drilling and servicing fluids |
| CN102177217A (en) * | 2008-08-08 | 2011-09-07 | 哈利伯顿能源服务公司 | Improved fluid loss compositions and methods of use for subterranean operations |
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Granted publication date: 20131002 Termination date: 20140424 |