CN104629712B - Deep acidizing acid liquid and method for realizing deep acidizing of low-permeability sandstone reservoir - Google Patents
Deep acidizing acid liquid and method for realizing deep acidizing of low-permeability sandstone reservoir Download PDFInfo
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- 239000002253 acid Substances 0.000 title claims abstract description 102
- 239000007788 liquid Substances 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 24
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 22
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 15
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 230000007797 corrosion Effects 0.000 claims abstract description 11
- 238000005260 corrosion Methods 0.000 claims abstract description 11
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000003381 stabilizer Substances 0.000 claims abstract description 7
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- 239000004094 surface-active agent Substances 0.000 claims abstract description 6
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000004927 clay Substances 0.000 claims abstract description 5
- 235000019253 formic acid Nutrition 0.000 claims abstract description 5
- 239000002562 thickening agent Substances 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 91
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000000654 additive Substances 0.000 claims description 14
- 230000000996 additive effect Effects 0.000 claims description 14
- 230000009466 transformation Effects 0.000 claims description 10
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 230000035699 permeability Effects 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000003112 inhibitor Substances 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 238000011161 development Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 239000009096 changqing Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000010129 solution processing Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A process for preparing the acid liquid used for deep acidizing of low-permeability sandstone reservoir includes such steps as adding hydrochloric acid, formic acid and acetic acid to acid tank, controlling the output of liquid preparing truck to 300L/min, adding corrosion inhibitor and iron ion stabilizer to acid tank, adding clay stabilizer and discharge assistant, circulating for 30 min, preparing acid liquid b, adding hydrochloric acid and hydrofluoric acid to acid tank, controlling the output of liquid preparing truck to 300L/min, adding corrosion inhibitor and iron ion stabilizer to acid tank, slowly adding CJ1-6 thickening agent (2.5 min per 100 kg), adding salt, surfactant and discharge assistant, circulating for 30 min, and deep acidizing.
Description
Technical field
The present invention relates to a kind of deep acidizing acid solution and low permeability sandstone reservoir deep acidizing method is realized, belongs to oil and opens
Adopt technical field.
Background technology
In recent years oil field development is run into the presence of without every interlayer, and core intersection is thin, bottom water development class reservoir.For this kind of reservoir,
Water layer will be linked up by the way of pressure break, directly contributes bottom water coning, oil well production water；Using conventional acidulation technology exist effect away from
From the problem of short, correctional effect is undesirable, it is therefore necessary to consider other well stimulations.
The content of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of deep acidizing acid solution and realizes low permeability sandstone reservoir
Deep acidizing method.
The present invention proposes a kind of method for realizing the transformation of low permeability sandstone reservoir deep acidizing and a kind of deep acidizing acid solution
Formula, the acidifying applied to Changqing oilfields low permeability sandstone reservoir are transformed.This method is first using conventional acid solution processing near wellbore zone
Pollution, then handle stratum using deep acidizing acid solution.The acid formula can keep H+ concentration for a long time, reach deep acidizing
The purpose on stratum.
The present invention provides a kind of acid solution of deep acidizing and a kind of method of deep acidizing transformation, is removed by conventional acid lyolysis
The pollution of near wellbore zone simultaneously dissolves away calcium ion, and then reduces main acid in the consumption of near wellbore zone and prevent the heavy of calcirm-fluoride
Form sediment；By using the deep acidizing acid formula of research and development, main acid H+ concentration is set to keep higher level, and adjusted by acid solution dosage
It is whole, it is further to improve Reservoir Acidization depth, to improve reservoir oil flow channel；Pit shaft is cleaned finally by with conventional acid solution, is made
Near wellbore zone reservoir is further acidified.
The technical solution adopted by the present invention is：Injected by the alternating of conventional acid solution and deep acidizing acid solution, improve acidifying
Radius, reduce injury of the conventional acidulation product to stratum.
The raw material of a kind of acid solution of deep acidizing and a kind of method of deep acidizing transformation includes：
1st, hydrochloric acid：Shanghai crystalline substance pure reagent Co., Ltd produces；
2nd, hydrofluoric acid, Shanghai crystalline substance pure reagent Co., Ltd；
3rd, corrosion inhibiter, Qingyang Chang Qing undergrounds oilfield additive company；
4th, cleanup additive, Qingyang Chang Qing undergrounds oilfield additive company；
5th, ferrous stability, Qingyang Chang Qing undergrounds oilfield additive company；
6th, surfactant, Qingyang Chang Qing undergrounds oilfield additive company；
7th, salt, Qingyang Chang Qing undergrounds oilfield additive company；
8th, CJ1-6, Qingyang Chang Qing undergrounds oilfield additive company；
9th, water.
A kind of acid solution of deep acidizing and a kind of method each component percentage by weight of deep acidizing transformation are：
Acid solution a each component percentage by weights are：
1st, hydrochloric acid, 10%；
2nd, formic acid, 2%；
3rd, acetic acid, 6%；
4th, corrosion inhibiter, 1%；
5th, cleanup additive, 0.5%；
6th, clay stabilizer, 0.5%；
7th, ferrous stability, 0.1%；
8th, clear water.
Acid solution b each component percentage by weights are
1st, hydrochloric acid, 10%；
2nd, hydrofluoric acid, 2%；
3rd, corrosion inhibiter, 1.5%；
4th, cleanup additive, 0.5%；
5th, ferrous stability, 0.1%；
6th, CJ1-6,0.1%；
7th, surfactant, 4%；
8th, salt, 0.2%；
9th, clear water.
A kind of acid solution of deep acidizing and a kind of method preparation method of deep acidizing transformation：
Hydrochloric acid, formic acid, acetic acid are added in sour tank, it is 300L/min to control liquid distributing vehicle discharge capacity, and flow back acid solution displacement size
It is not excessive for standard with funnel, corrosion inhibiter, ferrous stability are added in sour tank；Add clay stabilizer, cleanup additive, circulation
30 minutes.Acid solution a. is made
Hydrochloric acid, hydrofluoric acid are added in sour tank, it is 300L/min control liquid distributing vehicle discharge capacity, and the acid solution displacement size that flows back is to leak
Not excessive bucket is standard, and corrosion inhibiter, ferrous stability are added in sour tank；Then CJ1-6 thickening agents are slowly added to（Control
It is 2.5min that the time is added per 100kg）；Salt, surfactant, cleanup additive are added, is circulated 30 minutes.Acid solution b is made.
A kind of acid solution of deep acidizing and a kind of method technical process of deep acidizing transformation：
Pass sleeve gate → acid solution a acidifyings → acid solution b acidifyings → acid solution a acidifyings that active water is low to be replaced → acid solution a is low to be replaced → →
Active water replacement → closing well, open flow.The deep acidizing process and existing acidization are essentially identical, and difference is two kinds of acid solutions
Alternately inject twice.
The first step：Active water is low to be replaced：Pump is started, active water 5-10 side is injected by oil pipe, replaced out with active water in pit shaft
Original liquid simultaneously fills pit shaft, and discharge capacity is in 0.4m3/min；
Second step：Acid solution a is low to be replaced：Replaced by oil pipe into mono- flow line volume of acid solution a, discharge capacity is in 0.4m3/min；
3rd step：Close sleeve gate：Method by closing sleeve gate makes acid solution a initially enter stratum；
4th step：Acid solution a is acidified：The row of control under conditions of control oil pipe pressure is no more than this area's reservoir fracture pressure
Amount, no more than 0.8m3/ min, accumulative and second step inject acid solution a5-7m altogether3；
5th step：Acid solution b is acidified：Acid solution a is changed to acid solution b in the case where aforementioned condition is constant, acid solution b injection rates exist
20-30m3；
6th step：Acid solution a is acidified：Acid solution b is changed to acid solution a in the case where aforementioned condition is constant, acid solution a injection rates exist
3-5m3；
7th step：Active water replaces：Acid solution a is changed to active water, active water injection in the case where aforementioned condition is constant
Measure as a flow line volume；
8th step：Closing well, open flow：After closing well reaction 1-2 hours, drive a well open flow.
It is an advantage of the invention that the operating distance of acid solution in the earth formation can be extended, acidizing radius, Jin Erti are significantly improved
High well yield.
Embodiment
Obviously, those skilled in the art belong to the guarantor of the present invention based on many modifications and variations that spirit of the invention is done
Protect scope.
Embodiment 1：
A kind of deep acidizing acid solution and low permeability sandstone reservoir deep acidizing method is realized, be related to oil well acidation technology, be
It is used for the method for low permeability sandstone reservoir deep acidizing transformation using a kind of deep acidizing acid solution.
A kind of acid solution of deep acidizing and a kind of method of deep acidizing transformation, methods described include：
A, the preparation of acid solution：
Prepare container, configure conventional acid solution a and deep acidizing acid solution b as requested；
B, deep acidizing technical process：
Pass sleeve gate → acid solution a acidifyings → acid solution b acidifyings → acid solution a acidifyings that active water is low to be replaced → acid solution a is low to be replaced → →
Active water replacement → closing well, open flow.
The first step：Active water is low to be replaced：Pump is started, active water 5-10 side is injected by oil pipe, replaced out with active water in pit shaft
Original liquid simultaneously fills pit shaft, and discharge capacity is in 0.4m3/min；
Second step：Acid solution a is low to be replaced：Replaced by oil pipe into mono- flow line volume of acid solution a, discharge capacity is in 0.4m3/min；
3rd step：Close sleeve gate：Method by closing sleeve gate makes acid solution a initially enter stratum；
4th step：Acid solution a is acidified：The row of control under conditions of control oil pipe pressure is no more than this area's reservoir fracture pressure
Amount, no more than 0.8m3/ min, accumulative and second step inject acid solution a5-7m altogether3；
5th step：Acid solution b is acidified：Acid solution a is changed to acid solution b in the case where aforementioned condition is constant, acid solution b injection rates exist
20-30m3；
6th step：Acid solution a is acidified：Acid solution b is changed to acid solution a in the case where aforementioned condition is constant, acid solution a injection rates exist
3-5m3；
7th step：Active water replaces：Acid solution a is changed to active water, active water injection in the case where aforementioned condition is constant
Measure as a flow line volume；
8th step：Closing well, open flow：After closing well reaction 1-2 hours, drive a well open flow.
As described above, embodiments of the invention are explained, as long as but essentially without this hair of disengaging
Bright inventive point and effect can have many deformations, and this will be readily apparent to persons skilled in the art.Therefore, this
The variation of sample is also integrally incorporated within protection scope of the present invention.
Claims (1)
1. a kind of method for realizing the transformation of low permeability sandstone reservoir deep acidizing, it is characterized in that：
The each component percentage by weight of the deep acidizing acidifying solution of use is as follows：
Acid solution a each component percentage by weights：
Hydrochloric acid, 10%；
Formic acid, 2%；
Acetic acid, 6%；
Corrosion inhibiter, 1%；
Cleanup additive, 0.5%；
Clay stabilizer, 0.5%；
Ferrous stability, 0.1%；
Remaining is clear water；
Deep acidizing acid solution b each component percentage by weights：
Hydrochloric acid, 10%；
Hydrofluoric acid, 2%；
Corrosion inhibiter, 1.5%；
Cleanup additive, 0.5%；
Ferrous stability, 0.1%；
CJ1-6 thickening agents, 0.1%；
Surfactant, 4%；
Salt, 0.2%；
Remaining is clear water；
The method for realizing the transformation of low permeability sandstone reservoir deep acidizing includes：
A, the preparation of acid solution：
Acid solution a preparation：Hydrochloric acid, formic acid, acetic acid are added in sour tank, it is 300L/min to control liquid distributing vehicle discharge capacity, and flow back acid solution
Displacement size is not excessive for standard with funnel, and corrosion inhibiter, ferrous stability are added in sour tank；Add clay stabilizer, help
Agent is arranged, is circulated 30 minutes；
Acid solution b preparation：Hydrochloric acid, hydrofluoric acid are added in sour tank, it is 300L/min to control liquid distributing vehicle discharge capacity, and flow back acid solution discharge capacity
Size is not excessive for standard with funnel, and corrosion inhibiter, ferrous stability are added in sour tank；Then it is CJ1-6 thickening agents is slow
Add, it is 2.5min to control the addition time per 100kg；Salt, surfactant, cleanup additive are added, is circulated 30 minutes；
B, deep acidizing technical process：
Active water is low to close sleeve gate → acid solution a acidifyings → acid solution b acidifyings → acid solution a acidifyings → activity for → acid solution a is low to be replaced →
Water replacement → closing well, open flow；
The first step：Active water is low to be replaced：Pump is started, active water 5-10 side is injected by oil pipe, replaced out with active water original in pit shaft
Liquid simultaneously fills pit shaft, and discharge capacity is in 0.4m3/min；
Second step：Acid solution a is low to be replaced：Replaced by oil pipe into mono- flow line volume of acid solution a, discharge capacity is in 0.4m3/min；
3rd step：Close sleeve gate：Method by closing sleeve gate makes acid solution a initially enter stratum；
4th step：Acid solution a is acidified：Discharge capacity is controlled under conditions of control oil pipe pressure is no more than this area's reservoir fracture pressure,
No more than 0.8m3/ min, accumulative and second step inject acid solution a 5-7m altogether3；
5th step：Acid solution b is acidified：Acid solution a is changed to acid solution b in the case where aforementioned condition is constant, acid solution b injection rates are in 20-
30m3；
6th step：Acid solution a is acidified：Acid solution b is changed to acid solution a in the case where aforementioned condition is constant, acid solution a injection rates are in 3-
5m3；
7th step：Active water replaces：Acid solution a is changed to active water in the case where aforementioned condition is constant, active water injection rate is
One flow line volume；
8th step：Closing well, open flow：After closing well reaction 1-2 hours, drive a well open flow.
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| CN105735962A (en) * | 2016-01-30 | 2016-07-06 | 山东省鲁南地质工程勘察院 | Paleozoic carbonate heat storage reservoir chemical fracturing well flushing technique |
| CN107987816A (en) * | 2017-11-27 | 2018-05-04 | 延长油田股份有限公司 | A kind of layer dredge method and selective acidizing additive |
| CN108547607B (en) * | 2018-03-07 | 2021-01-01 | 陕西友邦石油工程技术有限公司 | Wide-band acidizing seam-making method for low-yield well of low-permeability oil field |
| CN110529091A (en) * | 2019-08-21 | 2019-12-03 | 中国石油天然气股份有限公司 | Horizontal well fixed-point acidizing method and application |
| CN114607345B (en) * | 2022-03-08 | 2023-10-31 | 中海油能源发展股份有限公司 | Technological method for expanding acidizing radius of offshore oilfield sandstone reservoir |
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| CN101067078A (en) * | 2007-03-24 | 2007-11-07 | 中国石化集团河南石油勘探局 | Sandstone matrix acidifying solution |
| CN101955770B (en) * | 2010-05-14 | 2013-03-27 | 北京奥凯立科技发展股份有限公司 | Main acid for oil well drilling and multi-hydrogen acid acidulating system with main acid |
| CN102899013A (en) * | 2011-07-29 | 2013-01-30 | 中国石油天然气股份有限公司 | Clastic sandstone gas reservoir acidizing fluid |
| CN102516976B (en) * | 2011-11-11 | 2013-07-31 | 中国石油天然气集团公司 | Preparation method of multi-component organic cross-linked acid liquid |
| CN102828734B (en) * | 2012-09-13 | 2015-03-18 | 西南石油大学 | Offshore oilfield water injection well online one-step-process acidification technology |
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