CN105482802A - Online acidizing acid liquid injection system for water injection well and preparation method of online acidizing acid liquid injection system - Google Patents
Online acidizing acid liquid injection system for water injection well and preparation method of online acidizing acid liquid injection system Download PDFInfo
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- CN105482802A CN105482802A CN201510959481.3A CN201510959481A CN105482802A CN 105482802 A CN105482802 A CN 105482802A CN 201510959481 A CN201510959481 A CN 201510959481A CN 105482802 A CN105482802 A CN 105482802A
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- injection well
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- 239000002253 acid Substances 0.000 title claims abstract description 40
- 238000002347 injection Methods 0.000 title claims abstract description 39
- 239000007924 injection Substances 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000002360 preparation method Methods 0.000 title claims description 11
- 239000007788 liquid Substances 0.000 title abstract description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000012530 fluid Substances 0.000 claims description 37
- 239000003352 sequestering agent Substances 0.000 claims description 25
- LDDQLRUQCUTJBB-UHFFFAOYSA-N ammonium fluoride Chemical compound [NH4+].[F-] LDDQLRUQCUTJBB-UHFFFAOYSA-N 0.000 claims description 18
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical group OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 14
- 239000007864 aqueous solution Substances 0.000 claims description 10
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 claims description 7
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 4
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 4
- 239000012964 benzotriazole Substances 0.000 claims description 4
- -1 mercaptan amine Chemical class 0.000 claims description 4
- 239000011505 plaster Substances 0.000 claims description 4
- 229960004418 trolamine Drugs 0.000 claims description 4
- 239000004567 concrete Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 20
- 239000000084 colloidal system Substances 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 11
- 238000005260 corrosion Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 11
- 229910021645 metal ion Inorganic materials 0.000 abstract description 9
- 239000002734 clay mineral Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 239000011435 rock Substances 0.000 abstract description 5
- 230000020477 pH reduction Effects 0.000 abstract description 3
- 239000002738 chelating agent Substances 0.000 abstract 2
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 abstract 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract 1
- 239000010426 asphalt Substances 0.000 abstract 1
- 239000013522 chelant Substances 0.000 abstract 1
- 239000003112 inhibitor Substances 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 19
- 238000000151 deposition Methods 0.000 description 12
- 230000008021 deposition Effects 0.000 description 12
- 239000011295 pitch Substances 0.000 description 12
- 241001449342 Chlorocrambe hastata Species 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 9
- 238000001556 precipitation Methods 0.000 description 8
- 239000010430 carbonatite Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 239000009096 changqing Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention provides an on-line injection acidizing acid system for a water injection well, wherein hydrochloric acid accounts for 5.0-20.0%; 5.0% -15.0% of ammonium fluoride; 2.0-10.0% of corrosion inhibitor; 3.0% -15.0% of chelating agent; the rest is water. The acid liquor system can effectively erode the clay mineral of the reservoir, carbonate rock and corresponding organic scales such as inorganic scale, colloid, asphalt and the like, and the chelating agent can efficiently chelate Ca2+、Mg2+、Fe3+And metal ions are used for avoiding forming secondary or tertiary precipitates, and one liquid replaces three steps of operation of a pre-liquid, a treatment liquid and a post-liquid of conventional acidification, so that the acidification construction process is simplified, the construction time and cost are saved, the safety risk and labor intensity are reduced, and the construction effect is improved.
Description
Technical field
The present invention relates to a kind of water injection well online injection acidifying acid fluid system and preparation method thereof, belong to oil-gas field development technical field.
Technical background
Acidizing Technology is one of current widely used well production increment measure, efficient solution can remove the injury that in brill completion and production process, reservoir causes, improve oil and gas production.Conventional acidulation injects certain type, the acid solution of concentration and the formula acid solution of additive composition according to a definite sequence to reservoir, tamper in corrosion formation rock part mineral or hole, crack, improve stratum or crack penetration, improve seepage flow condition, reach the object recovered or improve Oil & Gas Productivity.
Now widely used acid fluid system mainly hydrochloric acid, mud acid, hydrofluoric acid etc. and additive composite, though these acid fluid system carry out enforcement for a long time, achieves certain achievement.Conventional acidulation construction operation is according to on-the-spot practice of construction requirement, and acid solution needed for extemporaneous preparation, then carries out the operational procedures such as spearhead, treatment solution, subsequent fluid, and because complicated construction technique, construction condition are limited, equipment conveying cost is high, and labour intensity is large.Contemplated by the invention the problem such as site construction technology flow process and on-the-spot dosing difficulty, have studied a set of new type of continuous and inject acidifying acid fluid system, this acid fluid system directly can dilute use, and possesses spearhead, treatment solution, subsequent fluid three functions simultaneously, and three step process one step completes.
Summary of the invention
The object of the invention is for on-the-spot acidizing treatment technical process complicated, it is large that equipment runs energy consumption, the problems such as potential safety hazard is high, develop a kind of water injection well online injection acidifying acid fluid system and preparation method thereof, this acid fluid system can require directly to dilute use according to site operation, single step can complete spearhead, treatment solution, subsequent fluid three step construction operation, effectively simplify construction technology.
The technical solution used in the present invention is:
A kind of water injection well online injection acidifying acid fluid system, component is as follows by mass percentage:
Hydrochloric acid 5.0% ~ 20.0%;
Neutral ammonium fluoride 5.0% ~ 15.0%;
Inhibiter 2.0 ~ 10.0%;
Sequestrant 3.0% ~ 15.0%;
All the other components are water.
Described sequestrant is ethylenediamine tetraacetic acid (EDTA), complexon I is mixed with by 2:1 the aqueous solution that mass percent concentration is 25.0%.
Described inhibiter be trolamine, mercaptan amine,
benzotriazolebe mixed with by 1:1:1:1 the aqueous solution that mass percent concentration is 20.0% with ethylene glycol dimethyl ether.
The molecular weight of described sequestrant ethylenediamine tetraacetic acid (EDTA) and complexon I is respectively 292 and 191.
A preparation method for water injection well online injection acidifying acid fluid system, concrete steps are:
Get plastic beaker one, add the water of formula ratio, add hydrochloric acid, the Neutral ammonium fluoride of formula ratio more successively, after stirring with sticking plaster, add inhibiter, the sequestrant of formula ratio more successively, make hydrochloric acid, Neutral ammonium fluoride, the ratio of inhibiter, sequestrant is 5.0% ~ 20.0%:5.0% ~ 15.0%:2.0 ~ 10.0%:3.0% ~ 15.0%, after fully stirring.
Beneficial effect of the present invention is:
Compared with conventional acidulation measure acid solution used, this acid fluid system is while effective corrosion rock fracture, sour to current conventional syllogic (spearhead, treatment solution, subsequent fluid)
Change construction technology to improve, acid dilution is directly injected stratum to desired concn.
This technique does not need to remove water injection string, simplifies construction technology, saves the engineering time, reduces security risk and labour intensity, improves construction effect.
Embodiment
Embodiment 1:
The object of the invention is for on-the-spot acidizing treatment technical process complicated, it is large that equipment runs energy consumption, the problems such as potential safety hazard is high, develop a kind of water injection well online injection acidifying acid fluid system and preparation method thereof, this acid fluid system can require directly to dilute use according to site operation, single step can complete spearhead, treatment solution, subsequent fluid three step construction operation, effectively simplify construction technology.
A kind of water injection well online injection acidifying acid fluid system, component is as follows by mass percentage:
Hydrochloric acid 5.0%;
Neutral ammonium fluoride 5.0%%;
Inhibiter 2.0%;
Sequestrant 3.0%;
All the other components are water.
Hydrochloric acid: effectively corrosion Clay Mineral, the organic depositions such as carbonatite and corresponding inorganic scale, colloid, pitch;
Neutral ammonium fluoride: produce HF with hydrochloric acid reaction, improves the solution ration to organic depositions such as inorganic scale, colloid, pitches;
Inhibiter: protection metal pipe line is not corroded;
Sequestrant: highly effective chelating Ca
2+, Mg
2+, Fe
3+deng metal ion, avoid the formation of secondary or three precipitations.
This acid fluid system can effective corrosion Clay Mineral, the organic depositions such as carbonatite and corresponding inorganic scale, colloid, pitch, sequestrant energy highly effective chelating Ca
2+, Mg
2+, Fe
3+deng metal ion, avoid the formation of secondary or three precipitations, a kind of liquid substitutes the spearhead of conventional acidulation, treatment solution and the work of subsequent fluid three step, simplifies acidizing treatment technique, saves engineering time and cost, reduce security risk and labour intensity, improve construction effect
Embodiment 2:
A kind of water injection well online injection acidifying acid fluid system, component is as follows by mass percentage:
Hydrochloric acid 120.0%;
Neutral ammonium fluoride 10.0%;
Inhibiter 6.0%;
Sequestrant 9.0%;
All the other components are water.
Hydrochloric acid: effectively corrosion Clay Mineral, the organic depositions such as carbonatite and corresponding inorganic scale, colloid, pitch;
Neutral ammonium fluoride: produce HF with hydrochloric acid reaction, improves the solution ration to organic depositions such as inorganic scale, colloid, pitches;
Inhibiter: protection metal pipe line is not corroded;
Sequestrant: highly effective chelating Ca
2+, Mg
2+, Fe
3+deng metal ion, avoid the formation of secondary or three precipitations.
This acid fluid system can effective corrosion Clay Mineral, the organic depositions such as carbonatite and corresponding inorganic scale, colloid, pitch, sequestrant energy highly effective chelating Ca
2+, Mg
2+, Fe
3+deng metal ion, avoid the formation of secondary or three precipitations, a kind of liquid substitutes the spearhead of conventional acidulation, treatment solution and the work of subsequent fluid three step, simplifies acidizing treatment technique, saves engineering time and cost, reduce security risk and labour intensity, improve construction effect
Embodiment 3:
A kind of water injection well online injection acidifying acid fluid system, component is as follows by mass percentage:
Hydrochloric acid 20.0%;
Neutral ammonium fluoride 15.0%;
Inhibiter 10.0%;
Sequestrant 15.0%;
All the other components are water.
Hydrochloric acid: effectively corrosion Clay Mineral, the organic depositions such as carbonatite and corresponding inorganic scale, colloid, pitch;
Neutral ammonium fluoride: produce HF with hydrochloric acid reaction, improves the solution ration to organic depositions such as inorganic scale, colloid, pitches;
Inhibiter: protection metal pipe line is not corroded;
Sequestrant: highly effective chelating Ca
2+, Mg
2+, Fe
3+deng metal ion, avoid the formation of secondary or three precipitations.
This acid fluid system can effective corrosion Clay Mineral, the organic depositions such as carbonatite and corresponding inorganic scale, colloid, pitch, sequestrant energy highly effective chelating Ca
2+, Mg
2+, Fe
3+deng metal ion, avoid the formation of secondary or three precipitations, a kind of liquid substitutes the spearhead of conventional acidulation, treatment solution and the work of subsequent fluid three step, simplify acidizing treatment technique, save engineering time and cost, reduce security risk and labour intensity, improving construction effect sequestrant is ethylenediamine tetraacetic acid (EDTA) and complexon I, and molecular weight is respectively 292 and 191.Hydrochloric acid and Neutral ammonium fluoride are commercially available chemical pure or technical pure.Hydrochloric acid, Neutral ammonium fluoride are mixed with by 2:1.5 the aqueous solution that mass percent concentration is 20%.
Described inhibiter be selected from trolamine, mercaptan amine,
benzotriazolebe mixed with by 1:1:1:1 the aqueous solution that mass percent concentration is 20.0% by, ethylene glycol dimethyl ether.
Described sequestrant is selected from ethylenediamine tetraacetic acid (EDTA), complexon I are mixed with 25.0% aqueous solution by 2:1.
Embodiment 4:
On basis based on embodiment 2, a kind of preparation method of water injection well online injection acidifying acid fluid system is provided in the present embodiment, get plastic beaker one, add the water of formula ratio, add hydrochloric acid, Neutral ammonium fluoride successively again, after stirring with sticking plaster, then add inhibiter, sequestrant successively, after fully stirring.
Hydrochloric acid: effectively corrosion Clay Mineral, the organic depositions such as carbonatite and corresponding inorganic scale, colloid, pitch;
Neutral ammonium fluoride: produce HF with hydrochloric acid reaction, improves the solution ration to organic depositions such as inorganic scale, colloid, pitches;
Inhibiter: protection metal pipe line is not corroded;
Sequestrant: highly effective chelating Ca
2+, Mg
2+, Fe
3+deng metal ion, avoid the formation of secondary or three precipitations.
Hydrochloric acid, Neutral ammonium fluoride are mixed with by 2:1.5 the aqueous solution that mass percent concentration is 20%.
Described inhibiter be selected from trolamine, mercaptan amine,
benzotriazole, ethylene glycol dimethyl ether is mixed with by 1:1:1:1 the aqueous solution that mass percent concentration is 20.0%.
Described sequestrant is selected from ethylenediamine tetraacetic acid (EDTA), complexon I is mixed with by 2:1 the aqueous solution that mass percent concentration is 25.0%.
Embodiment 5:
A preparation method for water injection well online injection acidifying acid fluid system, gets 1000ml plastic beaker one, adding distil water 300ml, add hydrochloric acid 200ml, 150ml Neutral ammonium fluoride, after stirring with sticking plaster, add 100ml acid additive, 150ml sequestrant more successively, after fully stirring.
Changqing oilfields 5 mouthfuls of wells carry out construction operation, and implementation result sees the following form.
Changqing oilfields site operation data sheet
Construction results shows, water injection well online injection acidifying acid fluid system can effectively improve water injection well situation, increases zone permeability, improves resident fluid circulation situation, has good actual application value, be embodied in:
1, can highly effective chelating Ca
2+, Mg
2+, Fe
3+deng metal ion, avoid the formation of the precipitation such as fluoaluminate, silicofluoride;
2, can require directly to dilute use according to site operation, not need extemporaneous preparation.
3, on the basis of conventional acid liquid system, a kind of liquid completes the spearhead of conventional acidulation, treatment solution and the operation of subsequent fluid three step, fully dissolves part thereof rock, plays mud acid to the corrosion of clay, quartz, feldspar;
4, H can be slowly released
+, acid-rock reaction speed is slow, reaches the object of deep acidification, expands seepage channel simultaneously;
5, the organic depositions such as the inorganic scale in reservoir, colloid, pitch are dissolved, reduce seepage resistance.
Claims (5)
1. a water injection well online injection acidifying acid fluid system, is characterized in that: component is as follows by mass percentage:
Hydrochloric acid 5.0% ~ 20.0%;
Neutral ammonium fluoride 5.0% ~ 15.0%;
Inhibiter 2.0 ~ 10.0%;
Sequestrant 3.0% ~ 15.0%;
All the other components are water.
2. a kind of water injection well online injection acidifying acid fluid system according to claim 1, is characterized in that: described sequestrant is ethylenediamine tetraacetic acid (EDTA), complexon I is mixed with by 2:1 the aqueous solution that mass percent concentration is 25.0%.
3. a kind of water injection well online injection acidifying acid fluid system according to claim 1, is characterized in that: described inhibiter be trolamine, mercaptan amine,
benzotriazolebe mixed with by 1:1:1:1 the aqueous solution that mass percent concentration is 20.0% with ethylene glycol dimethyl ether.
4. a kind of water injection well online injection acidifying acid fluid system according to claim 2, is characterized in that: the molecular weight of described sequestrant ethylenediamine tetraacetic acid (EDTA) and complexon I is respectively 292 and 191.
5. according to the preparation method that any one acid fluid system described in claim 1-4 provides, it is characterized in that: concrete steps are:
Get plastic beaker one, add the water of formula ratio, add hydrochloric acid, the Neutral ammonium fluoride of formula ratio more successively, after stirring with sticking plaster, add inhibiter, the sequestrant of formula ratio more successively, make hydrochloric acid, Neutral ammonium fluoride, the ratio of inhibiter, sequestrant is 5.0% ~ 20.0%:5.0% ~ 15.0%:2.0 ~ 10.0%:3.0% ~ 15.0%, after fully stirring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510959481.3A CN105482802B (en) | 2015-12-21 | 2015-12-21 | Online acidizing acid liquid injection system for water injection well and preparation method of online acidizing acid liquid injection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510959481.3A CN105482802B (en) | 2015-12-21 | 2015-12-21 | Online acidizing acid liquid injection system for water injection well and preparation method of online acidizing acid liquid injection system |
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| Publication Number | Publication Date |
|---|---|
| CN105482802A true CN105482802A (en) | 2016-04-13 |
| CN105482802B CN105482802B (en) | 2018-08-14 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106590616A (en) * | 2016-12-20 | 2017-04-26 | 陕西海山能源发展有限公司 | Organic chelating acid system for oil-water well acidification |
| CN106645558A (en) * | 2016-12-29 | 2017-05-10 | 中国石油天然气股份有限公司 | Method for testing chelating capacity of chelating acid to metal magnesium ions |
| CN106833577A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Construction method for cleaning and preventing scale on-line acidification multi-section plug |
| CN106841513A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Method for testing chelating ability of chelating acid to metal iron ions |
| CN106833581A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Chelating agent and preparation method and application thereof |
| CN108267444A (en) * | 2016-12-29 | 2018-07-10 | 中国石油天然气股份有限公司 | Method for testing chelating ability of chelating acid to metal calcium ions |
| CN108467724A (en) * | 2018-03-12 | 2018-08-31 | 中国石油天然气股份有限公司 | Online shunt acid continuously injected into water injection well and preparation method thereof |
| CN111057534A (en) * | 2019-11-18 | 2020-04-24 | 中国石油天然气股份有限公司 | Emulsion acidification yield-increasing and injection-increasing agent and preparation and use methods thereof |
| CN113122221A (en) * | 2021-04-06 | 2021-07-16 | 西安石油大油气科技有限公司 | Acid liquor system for online acidification of water injection well for oil exploitation and preparation process thereof |
| CN114181692A (en) * | 2021-12-23 | 2022-03-15 | 北京金圣奥能源技术有限公司 | Polybasic chelated acidic alcohol-based blending-free fracturing fluid and preparation method and application thereof |
| CN115491186A (en) * | 2021-06-17 | 2022-12-20 | 中国石油天然气股份有限公司 | Injection increasing agent for low-permeability strong water-sensitive stratum and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106590616A (en) * | 2016-12-20 | 2017-04-26 | 陕西海山能源发展有限公司 | Organic chelating acid system for oil-water well acidification |
| CN106645558A (en) * | 2016-12-29 | 2017-05-10 | 中国石油天然气股份有限公司 | Method for testing chelating capacity of chelating acid to metal magnesium ions |
| CN106833577A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Construction method for cleaning and preventing scale on-line acidification multi-section plug |
| CN106841513A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Method for testing chelating ability of chelating acid to metal iron ions |
| CN106833581A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | Chelating agent and preparation method and application thereof |
| CN108267444A (en) * | 2016-12-29 | 2018-07-10 | 中国石油天然气股份有限公司 | Method for testing chelating ability of chelating acid to metal calcium ions |
| CN108467724A (en) * | 2018-03-12 | 2018-08-31 | 中国石油天然气股份有限公司 | Online shunt acid continuously injected into water injection well and preparation method thereof |
| US10961442B2 (en) | 2018-03-12 | 2021-03-30 | Petrochina Company Limited | On-line diverting acid for continuous injection into water injection wells and a preparation method thereof |
| CN111057534A (en) * | 2019-11-18 | 2020-04-24 | 中国石油天然气股份有限公司 | Emulsion acidification yield-increasing and injection-increasing agent and preparation and use methods thereof |
| CN111057534B (en) * | 2019-11-18 | 2022-08-05 | 中国石油天然气股份有限公司 | Emulsion acidification yield-increasing and injection-increasing agent and preparation and use methods thereof |
| CN113122221A (en) * | 2021-04-06 | 2021-07-16 | 西安石油大油气科技有限公司 | Acid liquor system for online acidification of water injection well for oil exploitation and preparation process thereof |
| CN115491186A (en) * | 2021-06-17 | 2022-12-20 | 中国石油天然气股份有限公司 | Injection increasing agent for low-permeability strong water-sensitive stratum and application thereof |
| CN114181692A (en) * | 2021-12-23 | 2022-03-15 | 北京金圣奥能源技术有限公司 | Polybasic chelated acidic alcohol-based blending-free fracturing fluid and preparation method and application thereof |
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