CN106281278B - A kind of oil well, water injection well economic benefits and social benefits de-plugging agent and its application method - Google Patents
A kind of oil well, water injection well economic benefits and social benefits de-plugging agent and its application method Download PDFInfo
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- CN106281278B CN106281278B CN201610651955.2A CN201610651955A CN106281278B CN 106281278 B CN106281278 B CN 106281278B CN 201610651955 A CN201610651955 A CN 201610651955A CN 106281278 B CN106281278 B CN 106281278B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/06—Methods or apparatus for cleaning boreholes or wells using chemical means for preventing, limiting or eliminating the deposition of paraffins or like substances
Abstract
A kind of oil well, water injection well economic benefits and social benefits de-plugging agent and application method, economic benefits and social benefits de-plugging agent are made up of A agent prescriptions, B agent prescriptions, C agent prescriptions, each to be formulated the de-plugging type that emphasizes particularly on different fields, and have complementary synergy again；Wherein A agent prescriptions are prepared by high active surfactant, are blocked for releasing organic species in oil-water well, are increased crude oil flow physical property；B agent prescriptions are prepared by acidic chemical medicament, are blocked for releasing inorganic species in oil-water well, permeability is improved in circulation expansion duct；C agent prescriptions are prepared by neutralization initiator, for neutralizing residual acid, are promoted residual acid, residue to return row, are prevented secondary pollution from blocking, extend the de-plugging term of validity, improve de-plugging success rate.Application method is different because of well not difference.It is characteristic of the invention that one-stop operation can release the blocking of oil well or the simultaneous organic species of water injection well and inorganic species, by tamper corrosion into powdered, residue raffinate is thoroughly returned into discharge well head during well-flushing, de-plugging limited period long the characteristics of high with de-plugging success rate.
Description
Technical field
The present invention relates to the old well Oil reserve digging field in oil field, more particularly to a kind of oil well, water injection well economic benefits and social benefits de-plugging agent and its
Application method, blocks with inorganic species for releasing simultaneous organic species in oil well, water injection well, solves existing routine
Plugging removal effect that de-plugging agent exists to formation blockage is poor, the term of validity is short or forms the problem of secondary pollution is blocked.
Background technology
The reason for oil well oil reservoir produces blocking with water injection well water filling layer is divided into two major classes.One class is inorganic species, because of drilling well
Process, operation process, treatment process, well workover process can produce the production such as solid phase particles, rock debris, iron oxide, soil cement
Raw blocking；Another kind of is wax, colloid, asphalitine precipitation caking, the aggregation of saprophytic bacteria metabolite in organic species, such as crude oil
Deng the blocking of generation；Both blockings can have a strong impact on the normal production in oil field；Over time, oil well, water injection well
Into the tail period stage, stratum and wellbore conditions are deteriorated, and above-mentioned blocking can be increasingly serious；Conventional acidifying class breaking block treatment
Efficiency is more and more lower again, to the injury rate more and more higher on stratum；Therefore scientific and technical innovation is needed, constantly invented targetedly sour
Neutralizing blocking agent is newly formulated and used new technology, reduces the injury rate to stratum, recovers or improves in-place permeability, increase crude oil production
Amount.
By thinking for many years to oil well, water injection well plugging reason：In same well, organic species and inorganic species
Block and exist simultaneously, simply emphasize particularly on different fields；Blocking position is general in 500~3000 meters of underground depth, and difficulty is to shift to an earlier date
Determine plugging reason and block type；Though conventional de-plugging agent prescription and having certain plugging removal effect using technique, technique is present such as
Lower deficiency：1. only a kind of formula can not release inorganic species simultaneously and organic species are blocked, and reason is：Chemical plugging removal agent is divided to two
Kind, one kind is acid de-plugging agent, is mainly used in releasing inorganic species blocking, blocks substantially invalid to organic species；It is another to be
Nonacid de-plugging agent both surfactant, is mainly used in releasing organic species and blocks, and blocks substantially invalid to inorganic species；And two
Plant after de-plugging agent compounding, because of rejection, be only able to display a kind of effect, or reduce its main effect；Conventional de-plugging agent prescription is usual
One of which is only used, plugging removal effect is not good enough；2. formula effect is single；Surfactant is used for oil well, water injection well de-plugging, effect
It is oil-in-water state that should possess reduction interfacial tension, molten wax viscosity reduction, wettability reversal, Water-In-Oil State Transferring that formation crude begins
Deng when above four indices are in high value, organic species could being blocked and release and extend the de-plugging term of validity；It is conventional non-
Acid de-plugging agent only has one of which index, or with many index but numerical value is very low；3. raffinate residue returns not thorough, the shape of row
Blocked into secondary.
The content of the invention
It is an object of the invention to provide a kind of oil well, water injection well economic benefits and social benefits de-plugging agent, existing conventional de-plugging agent is solved to stratum
Block exist the problem of plugging removal effect is poor, the term of validity is short or formation secondary pollution is blocked.
To achieve these goals, technical scheme provided by the present invention is：
A kind of oil well, water injection well economic benefits and social benefits de-plugging agent, 1~3 is pressed by A agent prescriptions, B agent prescriptions, C agent prescriptions:1~8:1~3
Volume ratio is constituted；
Wherein the mass percent of A agent prescriptions, which is constituted, is：Fluorocarbon surfactant 2.0~4.0%, sodium alkyl benzene sulfonate
1.0~4.0%, Tween 80 1.0~3.0%, polyethenoxy alkanolamide 0.5~2.0%, polyoxethylene octylphenyl phenol ether 0.5
~2.0%, surplus is clear water, and above constituent mass percentage sum is 100%；
Wherein the mass percent of B agent prescriptions, which is constituted, is：Hydrochloric acid 2.0~10.0%, hydrofluoric acid 1.0~3.0%, formic acid
2.0~3.0%, ammonium fluoride 1.0~2.0%, phosphatase 11 .0~3.0%, fluoboric acid 0.5~1.0%, bromination octadecylpyridinium
1.0~3.0%, polyvinyl alcohol 1.0~2.0%, chlorine dioxide 1.0~2.0%, acetic acid 0.5~1.5%, surplus is clear water, with
Upper constituent mass percentage sum is 100%；
Wherein the mass percent of C agent prescriptions, which is constituted, is：Ammonium chloride 5.0~10.0%, natrium nitrosum 5.0~10.0%,
Surplus is clear water, and above constituent mass percentage sum is 100%.
The mass ratio of ammonium chloride and natrium nitrosum is 1 wherein in C agent prescriptions:1.
It is a further object of the present invention to provide a kind of above-mentioned oil well, water injection well economic benefits and social benefits de-plugging agent application method, specifically
Implement according to the following steps：
The first step, injects A agent prescriptions：
By the A agent prescriptions that mass concentration is 5.0~15.0%, injection is implemented in de-plugging well；
Second step, injection B agent prescriptions and C agent prescriptions：
It is respectively that the B agent prescriptions of mass concentration 11.0~30.5% and the C agent prescriptions of mass concentration 10.0~20.0% is first
Injection is implemented in de-plugging well afterwards；Injection order is different according to injection object difference, during for de-plugging of well, first injects
C agent prescriptions, reinject B agent prescriptions；During for water injection well de-plugging, B agent prescriptions are first injected, C agent prescriptions are reinjected.
The features of the present invention is also resided in,
De-plugging agent injection rate calculation formula is：
πR2× n × k × (A+B+C)=E
Wherein, E is de-plugging agent total injection rate, unit m3；π is 3.14；R is plug removal radius, unit m；N is core intersection,
Unit m；K is oil reservoir porosity, unit %；A is A agent prescription volume ratios, and B is B agent prescription volume ratios, and C is C agent prescription volumes
Than；A agent prescriptions, B agent prescriptions, C agent prescription volume ratios summation are 1.
The beneficial effects of the invention are as follows a kind of oil well, water injection well economic benefits and social benefits de-plugging agent that the present invention is provided, one-stop operation can be solved
Except the blocking of oil well or the simultaneous organic species of water injection well and inorganic species, by tamper corrosion into powdered, during well-flushing
By the thorough row of returning of residue raffinate, reach that de-plugging success rate is high, the purpose of de-plugging term of validity length.
Embodiment
The present invention is further illustrated below by specific embodiment；
Embodiment 1
The de-plugging agent of the present embodiment is used for water injection well, and 1 is pressed by A agent prescriptions, B agent prescriptions and C agent prescriptions:2.5:2 volume
Than constituting.
Wherein A agent prescriptions are constituted, and mass concentration is：Fluorocarbon surfactant 2.0%, sodium alkyl benzene sulfonate 1.0%, tween
80 1.0%, polyethenoxy alkanolamide 0.5%, polyoxyethylene alkylamide 0.5%, mass concentration total 5%, surplus is clear
Water.
Wherein B agent prescriptions are constituted, and mass concentration is：Hydrochloric acid 2.0%, hydrofluoric acid 1.0%, formic acid 2.0%, ammonium fluoride
1.0%th, phosphatase 11 .0%, fluoboric acid 0.5%, bromination octadecylpyridinium (OPB) 1.0%, polyvinyl alcohol 1.0%, chlorine dioxide
1.0%th, acetic acid 0.5%, mass concentration total 11%, surplus is clear water.
Wherein C agent prescriptions are constituted, and mass concentration is：Ammonium chloride 5.0%, natrium nitrosum 5.0%, mass concentration add up to
10%, surplus is clear water.
The total consumption design of the present embodiment economic benefits and social benefits de-plugging agent：3.14 × 32 (m) × 5 (m) × (m of 11.7% × 1 ≈ 16.53)；
Economic benefits and social benefits de-plugging agent A agent, B agent, the total consumption of C agent are designed as 16.5m3, A agent prescriptions 3.0m3, B agent prescriptions 7.5m3, C agent prescriptions
6.0m3。
Its application process is as follows：
First step injection A agent prescriptions 3.0m3, implantation quality concentration 5.0%, second step injection B agent prescriptions 7.5m3, inject matter
Measure concentration 11.0%, the 3rd step injection C agent prescriptions 6.0m3, implantation quality concentration 10.0%.
Field conduct effect：Oil pressure 18.5MPa before measure, day injection allocation 20.0m3, daily water-injection rate 0.0m3；Oil pressure after measure
9.1MPa, day injection allocation 20.0m3, daily water-injection rate 20.0m3；Implementation result：This water injection well oil pressure declines 9.4MPa, and daily water-injection rate increases
Plus 20.0m3, day is met with fluence requirement.
Embodiment 2
The de-plugging agent of the present embodiment is used for water injection well, and 1.5 are pressed by A agent prescriptions, B agent prescriptions and C agent prescriptions:3:2 volume
Than constituting.
Wherein A agent prescriptions are constituted, and mass concentration is：Fluorocarbon surfactant 2.5%, sodium alkyl benzene sulfonate 2.0%, tween
80 2.0%, polyethenoxy alkanolamide 1.0%, polyoxyethylene alkylamide 1.0%, mass concentration add up to 8.5%, and surplus is
Clear water.
Wherein B agent prescriptions are constituted, and mass concentration is：Hydrochloric acid 5.0%, hydrofluoric acid 1.5%, formic acid 1.5%, ammonium fluoride
1.6%th, phosphatase 11 .7%, fluoboric acid 0.7%, bromination octadecylpyridinium (OPB) 2.0%, polyvinyl alcohol 1.5%, chlorine dioxide
1.5%th, acetic acid 1.0%, mass concentration total 18%, surplus is clear water.
Wherein C agent prescriptions are constituted, and mass concentration is：Ammonium chloride 6.0%, natrium nitrosum 6.0%, mass concentration add up to
12%, surplus is clear water.
The total consumption design of the present embodiment economic benefits and social benefits de-plugging agent：The ≈ 24.0 of 3.14 × 3.52 (m) × 6.4 (m) × 9.6% × 1
(m3)；Economic benefits and social benefits de-plugging agent A agent, B agent, the total consumption of C agent are designed as 24.0m3, A agent prescriptions 6.0m3, B agent prescriptions 12.0m3, C agent matches somebody with somebody
Square 8.0m3。
Its application process is as follows：
First step injection A agent prescriptions 6.0m3, implantation quality concentration 8.5%, second step injection B agent prescriptions 12.0m3, injection
Mass concentration 18.0%, the 3rd step injection C agent prescriptions 8.0m3, implantation quality concentration 12.0%.
Field conduct effect：Oil pressure 20.6MPa before measure, day injection allocation 30.0m3, daily water-injection rate 2.1m3；Oil pressure after measure
11.2MPa, day injection allocation 30.0m3, daily water-injection rate 30.2m3, implementation result：This water injection well oil pressure declines 9.4MPa, and daily water-injection rate increases
Plus 28.1m3, day is met with fluence requirement.
Embodiment 3
The de-plugging agent of the present embodiment is used for oil well, and 1 is pressed by A agent prescriptions, B agent prescriptions and C agent prescriptions:1:1 volume ratio structure
Into.
Wherein A agent prescriptions are constituted, and mass concentration is：Fluorocarbon surfactant 3.0%, sodium alkyl benzene sulfonate 3.0%, tween
80 2.5%, polyethenoxy alkanolamide 1.7%, polyoxyethylene alkylamide 1.8%, mass concentration add up to 12%, and surplus is
Clear water.
Wherein B agent prescriptions are constituted, and mass concentration is：Hydrochloric acid 8.0%, hydrofluoric acid 2.5%, formic acid 2.8%, ammonium fluoride
1.7%th, phosphoric acid 2.5%, fluoboric acid 0.8%, bromination octadecylpyridinium (OPB) 2.5%, polyvinyl alcohol 1.8%, chlorine dioxide
1.2%th, acetic acid 1.2%, mass concentration total 25%, surplus is clear water.
Wherein C agent prescriptions are constituted, and mass concentration is：Ammonium chloride 8.0%, natrium nitrosum 8.0%, mass concentration add up to
16%, surplus is clear water.
The total consumption design of the present embodiment economic benefits and social benefits de-plugging agent：(the m of the ≈ of 3.14 × 3.12 (m) × 4.0 × 14.5% × 1 18.03)；
De-plugging agent A agent, B agent, the total consumption of C agent are designed as 18.0m3, A agent prescriptions 6.0m3, B agent prescriptions 6.0m3, C agent prescriptions 6.0m3。
Its application method is as follows：
First step injection A agent prescriptions 6.0m3, implantation quality concentration 12.0%, second step injection C agent prescriptions 6.0m3, injection
Mass concentration 16.0%, the 3rd step injection B agent prescriptions 6.0m3, implantation quality concentration 25.0%.
Field conduct effect：Produce liquid 1.51m before measure daily3, day oil-producing 0.12t, moisture content 90.6%；Produce liquid after measure daily
8.66m3, day oil-producing 4.2t, moisture content 42.9%；Implementation result：Produce liquid increase 7.15m daily3, day oil-producing increase 4.08t.
Embodiment 4
The de-plugging agent of the present embodiment is used for oil well, and 3 are pressed by A agent prescriptions, B agent prescriptions and C agent prescriptions:8:3 volume ratio structure
Into.
Wherein A agent prescriptions are constituted, and mass concentration is：Fluorocarbon surfactant 4.0%, sodium alkyl benzene sulfonate 4.0%, tween
80 3.0%, polyethenoxy alkanolamide 2.0%, polyoxyethylene alkylamide 2.0%, mass concentration add up to 15%, and surplus is
Clear water.
Wherein B agent prescriptions are constituted, and mass concentration is：Hydrochloric acid 10.0%, hydrofluoric acid 3.0%, formic acid 3.0%, ammonium fluoride
2.0%th, phosphatase 11 .0%, fluoboric acid 3.0%, bromination octadecylpyridinium (OPB) 3.0%, polyvinyl alcohol 2.0%, chlorine dioxide
2.0%th, acetic acid 1.5%, mass concentration total 30.5%, surplus is clear water.
Wherein C agent prescriptions are constituted, and mass concentration is：Ammonium chloride 10.0%, natrium nitrosum 10.0%, mass concentration add up to
20%, surplus is clear water.
The total consumption design of the present embodiment economic benefits and social benefits de-plugging agent：The ≈ 56.0 of 4.0 (m) × 3.14 × 7.6 (m) × 14.6% × 1
(m3)；De-plugging agent A agent, B agent, the total consumption of C agent are designed as 53.0m3, A agent prescriptions 12.0m3, B agent prescriptions 32.0m3, C agent prescriptions
12.0m3。
Its application method is as follows：
First step injection A agent prescriptions 12.0m3, implantation quality concentration 15.0%, second step injection C agent prescriptions 12.0m3, note
Enter mass concentration 20.0%, the 3rd step injection B agent prescriptions 32.0m3, implantation quality concentration 30.5%.
Field conduct effect：Produce liquid 0.8m before measure daily3, day oil-producing 0.1t, moisture content 85.3%；Produce liquid after measure daily
7.8m3, day oil-producing 5.4t, moisture content 18.6%；Implementation result：Produce liquid increase 7.0m daily3, day oil-producing increase 5.4t.
Particular embodiments described above, has been carried out further in detail to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail bright, be not intended to be the present invention any limitation；For the technical field of the invention, substantive structure of the invention is not being departed from
On the premise of think of, some simple deduction or replace can also be made, should be all considered as within the scope of the claims in the present invention.
The principle of the present invention is：
The present invention is a prescription system, is made up of A agent prescriptions, B agent prescriptions, C agent prescriptions, each to be formulated the de-plugging that emphasizes particularly on different fields
Type, has complementary synergy again, is a set of comprehensive, multi-functional for oil well, the scientific and technological formula system of water injection well；
The principle of wherein A agent prescriptions is：A agent prescriptions are prepared by high active surfactant, are reduced in surface tension, molten
Wax viscosity reduction, moistening reversion, the Water-In-Oil State Transferring that formation crude is begun is in higher number into 4 indexs such as oil-in-water state
Value, by reducing surface tension, organic species tamper such as wax, colloid, asphalitine that perforated interval and near wellbore zone are adsorbed
Strip down；Acted on by molten wax viscosity reduction, bulk or graininess tamper dissolved with water and emulsified, beneficial to by tamper with stratum
Water discharges stratum；It is oil-in-water state by Water-In-Oil State Transferring, the resistance of oil migration is reduced, beneficial to crude oil and blocking
Thing discharges well head；Acted on by wettability reversal, the lipophile of ground layer original is reversed to hydrophily, follow-up crude oil is no longer again
It is adsorbed in surface of stratum.
The principle of wherein B agent prescriptions is：B agent prescriptions are prepared by acidic chemical medicament for host, for corrosion incrustation scale, raw
Thing limestone chip, fracturing fluid residue, drilling fluid mud cake, the inorganic species such as clay cement are blocked, and ground is improved in circulation expansion duct
Layer permeability,
The principle of wherein C agent prescriptions is：C agent prescriptions are prepared by neutralization initiator, for neutralizing residual acid, and produce high temperature
Slug is suppressed, it is counter to push away residual acid, residue to pit shaft, discharge well head is returned with flushing fluid, prevents secondary pollution from blocking, extension de-plugging is effective
Phase.
Claims (3)
1. a kind of oil well, water injection well economic benefits and social benefits de-plugging agent, it is characterised in that press 1~3 by A agent prescriptions, B agent prescriptions, C agent prescriptions:1
~8:1~3 volume ratio is constituted；
Wherein the mass percent of A agent prescriptions, which is constituted, is：Fluorocarbon surfactant 2.0~4.0%, sodium alkyl benzene sulfonate 1.0~
4.0%th, Tween 80 1.0~3.0%, polyethenoxy alkanolamide 0.5~2.0%, polyoxethylene octylphenyl phenol ether 0.5~
2.0%, surplus is clear water, and above constituent mass percentage sum is 100%；
Wherein the mass percent of B agent prescriptions, which is constituted, is：Hydrochloric acid 2.0~10.0%, hydrofluoric acid 1.0~3.0%, formic acid 2.0~
3.0%th, ammonium fluoride 1.0~2.0%, phosphatase 11 .0~3.0%, fluoboric acid 0.5~1.0%, bromination octadecylpyridinium 1.0~
3.0%th, polyvinyl alcohol 1.0~2.0%, chlorine dioxide 1.0~2.0%, acetic acid 0.5~1.5%, surplus are clear water, above group
It is 100% to divide mass percent sum；
Wherein the mass percent of C agent prescriptions, which is constituted, is：Ammonium chloride 5.0~10.0%, natrium nitrosum 5.0~10.0%, surplus
For clear water, above constituent mass percentage sum is 100%；
The mass ratio of ammonium chloride and natrium nitrosum is 1 wherein in C agent prescriptions:1.
2. the application method based on a kind of oil well described in claim 1, water injection well economic benefits and social benefits de-plugging agent, it is characterised in that implement
Step is：
The first step, injects A agent prescriptions：
By the A agent prescriptions that mass concentration is 5.0~15.0%, injection is implemented in de-plugging well；
Second step, is injected separately into B agent prescriptions and C agent prescriptions：
By the B agent prescriptions of mass concentration 11.0~30.5% and the C agent prescriptions of mass concentration 10.0~20.0%, injection is implemented
In de-plugging well；Injection order is different according to injection object difference, during for de-plugging of well, first injects C agent prescriptions, then note
Enter B agent prescriptions；During for water injection well de-plugging, B agent prescriptions are first injected, C agent prescriptions are reinjected.
3. the application method based on a kind of oil well described in claim 2, water injection well economic benefits and social benefits de-plugging agent, it is characterised in that de-plugging
Agent injection rate calculation formula is：
πR2× n × k × (A+B+C)=E
Wherein, E is de-plugging agent total injection rate, unit m3；π is 3.14；R is plug removal radius, unit m；N is core intersection, unit m；
K is oil reservoir porosity, unit %；A is A agent prescription volume ratios, and B is B agent prescription volume ratios, and C is C agent prescription volume ratios；A agent is matched somebody with somebody
Side, B agent prescriptions, C agent prescription volume ratios summation are 1.
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| CN111234794B (en) * | 2020-03-18 | 2020-10-27 | 北京大德广源石油技术服务有限公司 | Composite blocking remover and application method thereof |
| CN113464095B (en) * | 2020-03-30 | 2023-02-07 | 中国石油天然气股份有限公司 | Acidizing and blockage removing method for sandstone high-temperature and high-pressure gas well shaft |
| CN111607376A (en) * | 2020-04-23 | 2020-09-01 | 大庆宇涵井下作业技术服务有限公司 | Ternary composite flooding blockage removal agent for ternary flooding injection well augmented injection technology |
| US11441063B1 (en) * | 2021-04-07 | 2022-09-13 | Saudi Arabian Oil Company | Method to remove wellbore damage using thermochemical fluid |
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| CN106281278A (en) | 2017-01-04 |
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