CN105482802A - On-line injection acidification acid fluid system for water injection well and preparation method of on-line injection acidification acid fluid system - Google Patents
On-line injection acidification acid fluid system for water injection well and preparation method of on-line injection acidification acid fluid 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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- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Abstract
The invention provides an on-line injection acidification acid fluid system for a water injection well. The on-line injection acidification acid fluid system is prepared from 5.0%-20.0% of hydrochloric acid, 5.0%-15.0% of ammonium fluoride, 2.0%-10.0% of a corrosion inhibitor, 3.0%-15.0% of a chelating agent and the balance water. The acid fluid system can effectively corrode reservoir clay minerals, carbonatite, corresponding inorganic scale and organic scale such as colloid and pitch, and the chelating agent can efficiently chelate metal ions such as Ca2+, Mg2+ and Fe3+ to avoid secondary or tertiary sedimentation. One fluid replaces prepad fluid, treatment fluid and postpad fluid in conventional acidification, so that the acidification construction technology is simplified, the construction time is shortened, the construction cost is lowered, safety risks 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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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 | Test method for chelating ability of chelated acid to metal magnesian ions |
| CN106833581A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of chelating agent and its preparation method and application |
| CN106841513A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of chelated acid is to metallic iron ion chelating capacity method of testing |
| CN106833577A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of clear antiscale is acidified many slug construction methods online |
| CN108267444A (en) * | 2016-12-29 | 2018-07-10 | 中国石油天然气股份有限公司 | A kind of chelated acid is to the test method of the sequestering power of metal calcium ion |
| CN108467724A (en) * | 2018-03-12 | 2018-08-31 | 中国石油天然气股份有限公司 | A kind of online shunting acid and preparation method thereof that water injection well is continuously injected into |
| 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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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 | Test method for chelating ability of chelated acid to metal magnesian ions |
| CN106833581A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of chelating agent and its preparation method and application |
| CN106841513A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of chelated acid is to metallic iron ion chelating capacity method of testing |
| CN106833577A (en) * | 2016-12-29 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of clear antiscale is acidified many slug construction methods online |
| CN108267444A (en) * | 2016-12-29 | 2018-07-10 | 中国石油天然气股份有限公司 | A kind of chelated acid is to the test method of the sequestering power of metal calcium ion |
| CN108467724A (en) * | 2018-03-12 | 2018-08-31 | 中国石油天然气股份有限公司 | A kind of online shunting acid and preparation method thereof that water injection well is continuously injected into |
| 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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