CN104629711A - Slow-speed low-friction acid solution system for acid fracturing - Google Patents
Slow-speed low-friction acid solution system for acid fracturing Download PDFInfo
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- CN104629711A CN104629711A CN201310552852.7A CN201310552852A CN104629711A CN 104629711 A CN104629711 A CN 104629711A CN 201310552852 A CN201310552852 A CN 201310552852A CN 104629711 A CN104629711 A CN 104629711A
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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
- C09K8/62—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
- C09K8/76—Eroding chemicals, e.g. acids combined with additives added for specific purposes for preventing or reducing fluid loss
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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 relates to a slow-speed low-friction acid solution system for acid fracturing. The system is composed of 20 to 40 parts by volume of emulsified acid and 60 to 80 parts by volume of thickened acid, and the total volume of the emulsified acid and thickened acid is 100 parts by volume. The emulsified acid component is composed of the following components in parts by volume: 6 parts of diesel oil, 0.06 to 0.15 part of emulsifying agent, 0.7 to 2.1 parts of acid liquid multi-effect additive, and the balance being 31% of hydrochloric acid, wherein the total volume of all components is 20 to 40 parts by volume. The thickened acid component is composed of the following components in parts by volume: 0.16 to 0.64 part of thickening agent, 0.8 to 0.6 part of cleanup additive, 2.4 to 3.6 parts of high temperature corrosion inhibitor, 0.6 to 0.8 part of iron ion stabilizer, and the balance being 31% of hydrochloric acid; wherein the total volume of all components is 60 to 80 parts by volume. The provided system has the advantages of high viscosity and small fluid loss under conditions of room temperature and strong acid, is benefit for fracture-making, has the characteristics of speed reducing performance, low friction, and good discharge assisting performance, can enlarge the acid fracturing treatment radius, and improves the flow guiding performance of cracks formed by acid corrosion.
Description
Technical field
The present invention relates to the slow low frictional resistance acid fluid system of a kind of acid fracturing.
Background technology
The acidfracturing treatment of carbonatite temperature reservoirs also exists acid-rock reaction excessive velocities, cannot form longer acid-etched fracture, cannot realize the difficult problems such as Depth Acid Fracturing.Domestic and international experts and scholars solve the transformation of carbonatite high temperature deep well Depth Acid Fracturing to have done a large amount of research work, propose the acid fluid system such as gelled acid (gel acid), foamed acid, emulsified acid.Common gelled acid (gel acid) reduces acid-rock reaction speed by regulating acid liquid viscosity, but such system heatproof resistant to shearing ability is poor, and the liquid not easily row of returning after broken glue; Foamed acid has the advantage that leak-off is low, frictional resistance is little, acid solution amount is little, but it is only applicable to the acid fracturing construction in 1500 ~ 2500m well depth, is not suitable for high temperature deep well acid fracturing, and has particular requirement to site operation equipment; Emulsified acid often uses diesel oil or crude oil as emulsified acid foreign minister, inside be generally hydrochloric acid or mud acid mutually, there is the shortcoming of high frictional resistance (higher by 20% than common gelled acid frictional resistance), and the use of diesel oil makes site operation there is potential safety hazard, also limit applying of emulsified acid.
Acid fracturing for carbonatite high temperature deep well is transformed, and proposes the high slow low frictional resistance acid fluid system of a kind of acid fracturing.Emulsified acid and gelled acid combine by this system, have emulsified acid low acid-rock reaction speed, the low frictional resistance two-fold advantage of gelled acid concurrently, can be used for the deep transformation realizing carbonate reservoir, and greatly reduce site operation to the requirement exporting water horse power.
Summary of the invention
The object of this invention is to provide a kind of low frictional resistance acid fluid system that can be used for temperature reservoirs, this system has good rheological property and retardative property, can ensure effectively to make seam.This acid fluid system has low friction loss characteristic, operating pressure lower when can ensure that acid fracturing is constructed, there is lower acid-rock reaction speed, can effectively increase acid solution operating distance, acid solution and crack wall rock react and form rough seam face, and final formation has the acid-etched fracture of high flow conductivity.
The scheme that the present invention takes for technical solution problem is: the high slow low frictional resistance acid fluid system of a kind of acid fracturing, this acid fluid system is made up of 20 ~ 40 parts of emulsified acids and 60 ~ 80 parts of gelled acids, and emulsified acid and gelled acid volume summation are 100 parts.
Emulsified acid component by diesel oil 6 parts, emulsifying agent 0.06 ~ 0.15 part, acid solution multipurpose additive 0.7 ~ 2.1 part, more than be 31% hydrochloric acid, each volume components sum of emulsified acid is 20 ~ 40 parts.
Gelled acid component by viscosifying agent 0.16 ~ 0.64 part, cleanup additive 0.8 ~ 0.6 part, high-temperature corrosion inhibitor 2.4 ~ 3.6 parts, Fe stabilizer 0.8 ~ 0.6 part, more than be 31% hydrochloric acid, each volume components sum of gelled acid is 60 ~ 80 parts.
Inventive solution be acid fluid system to reduce acid-rock reaction speed, improve fracture flow capacity, final to improve individual well oil and gas production be principle.This system, by emulsified acid and gelled acid being combined, has emulsified acid low acid-rock reaction speed, the low frictional resistance two-fold advantage of gelled acid concurrently, greatly reduces site operation to the requirement exporting water horse power.
This acid fluid system Main Feature: (1) liquid frictional resistance is low, is only 40% ~ 50% of clear water, is beneficial to on-the-spot infusion; (2) there is good temperature and shearing sustainability; (2) there is good viscosity, be beneficial to formation slit; (3) lower acid-rock reaction speed, retardative property is excellent; (4) broken glue is thorough, meets construction requirement.
Advantage of the present invention and beneficial effect:
(1) the slow low frictional resistance acid fluid system energy temperature resistance 100 DEG C of this height, most high-temperature resistant 140 DEG C, high temperature rheology can be stablized, and resistant to shearing performance is given prominence to.
(2) have the low liquid viscosity of more conventional gelled acid, fluid loss is little, is beneficial to and makes seam.
(3) there is the acid-rock reaction speed that more conventional gelled acid is lower, can react with crack wall rock and form rough seam face, the slit with high flow conductivity of linking up far-end reservoir after crack closure, can be formed.
(4) the slow low frictional resistance acid fluid system of this height belongs to non-crosslinked acid fluid system, and do not need to add gel breaker, reservoir secondary injury is little.
(5) acid fluid system is more excellent than conventional gelled acid retardative property, avoids the drawback that conventional emulsion acid site operation frictional resistance is high simultaneously.
Embodiment
Embodiment 1:
6 parts of diesel oil, 0.08 part of emulsifying agent, 0.7 part of acid solution multipurpose additive, 13.22 part of 31% hydrochloric acid are made into emulsified acid, and by 0.2 part of viscosifying agent, 0.6 portion of cleanup additive, 2.4 parts of high-temperature corrosion inhibitors, 0.6 part of Fe stabilizer, 76.2 part of 31% hydrochloric acid is made into gelled acid.On-the-spot adopt pump truck simultaneously by emulsified acid and gelled acid by volume the ratio of 20:80 pump into high pressure pipe joint and carry out acid fracturing construction.
The high slow low frictional resistance acid fluid system of embodiment 1 one kinds of acid fracturings are applicable to 100 DEG C, the well depth carbonate reservoir acidfracturing treatment that is greater than 2500 meters.
Embodiment 2:
6 parts of diesel oil, 0.12 part of emulsifying agent, 1.5 parts of acid solution multipurpose additives, 12.38 part of 31% hydrochloric acid are made into emulsified acid, and by 0.4 part of viscosifying agent, 0.7 portion of cleanup additive, 3.0 parts of high-temperature corrosion inhibitors, 0.7 part of Fe stabilizer, 75.2 part of 31% hydrochloric acid is made into gelled acid.On-the-spot adopt pump truck simultaneously by emulsified acid and gelled acid by volume the ratio of 20:80 pump into high pressure pipe joint and carry out acid fracturing construction.
The high slow low frictional resistance acid fluid system of embodiment 2 one kinds of acid fracturings are applicable to 120 DEG C, the well depth carbonate reservoir acidfracturing treatment that is greater than 3000 meters.
Embodiment 3:
6 parts of diesel oil, 0.15 part of emulsifying agent, 2.1 parts of acid solution multipurpose additives, 13.22 part of 31% hydrochloric acid are made into emulsified acid, and by 0.6 part of viscosifying agent, 0.8 portion of cleanup additive, 3.6 parts of high-temperature corrosion inhibitors, 0.8 part of Fe stabilizer, 74.2 part of 31% hydrochloric acid is made into gelled acid.On-the-spot adopt pump truck simultaneously by emulsified acid and gelled acid by volume the ratio of 20:80 pump into high pressure pipe joint and carry out acid fracturing construction.
The high slow low frictional resistance acid fluid system of embodiment 3 one kinds of acid fracturings are applicable to 140 DEG C, the well depth carbonate reservoir acidfracturing treatment that is greater than 3500 meters.
In above-described embodiment, emulsifying agent is purchased from Binzhou Guang You Chemical Co., Ltd.; Acid solution multipurpose additive is purchased from Beijing Shi great Order Science and Technology Ltd.; Viscosifying agent is purchased from Beijing Xitao Development Tech Co., Ltd.; Cleanup additive is purchased from Beijing Ke Maishi Petroleum Technology Co., Ltd; High-temperature corrosion inhibitor is purchased from Yanzhou Shi Qianshi Chemical Co., Ltd.; Fe stabilizer is purchased from Binzhou Guang You Chemical Co., Ltd..
The feature performance benefit of the high slow low frictional resistance acid fluid system of this acid fracturing and beneficial effect, show from following test result.In test, test the performance index of embodiment 1,2,3.
One, acid-rock reaction speed ability is evaluated
NW Hebei carbonatite rock core of appearing is used to carry out acid-rock reaction dynamic experiment.To under 100 DEG C, 120 DEG C, 140 DEG C hot conditionss, common gelled acid (20% hydrochloric acid) and embodiment 1, embodiment 2, embodiment 3 have carried out acid-rock reaction dynamic experiment respectively, and data are as follows:
Table 1 acid-rock reaction dynamic performance contrasts
Table 1 can find out that embodiment 1,2,3 all has the low acid-rock reaction speed of conventional common gelled acid respectively under 100 DEG C, 120 DEG C, 140 DEG C conditions, illustrates that embodiment 1,2,3 all has excellent acid-rock reaction speed, is beneficial to realization and makes slit;
Two, the high slow low frictional resistance acid fluid system temperature and shearing sustainability of a kind of acid fracturing
Experimental test acid fluid system rheological property at different temperatures, the results are shown in Table 2.
The high slow low frictional resistance acid fluid system heatproof resistant to shearing (170s of table 2 acid fracturing
-1) performance
Note: experimental installation is Grace M5600; Experiment starting temperature is room temperature (30 DEG C); Heat-up rate is standard of instruments heat-up rate.
Table 2 can find out that embodiment 1,2,3 viscosity under room temperature (30 DEG C) condition is all lower, and acid fluid system frictional resistance is low, on-the-spot easily infusion; Under 100 DEG C, 120 DEG C, 140 DEG C hot conditionss, resistant to shearing stable performance is excellent, and after shearing 90min, liquid only has the viscosity of about 10mPas, illustrates that liquid must not use gel breaker can realize brokenly glue, is beneficial to acid fracturing construction later stage raffinate and returns row.
Claims (3)
1. the slow low frictional resistance acid fluid system of acid fracturing, it is characterized in that: this acid fluid system is made up of 20 ~ 40 parts of emulsified acids and 60 ~ 80 parts of gelled acids, emulsified acid and gelled acid volume summation are 100 parts.
2. the slow low frictional resistance acid fluid system of a kind of acid fracturing according to claim 1, it is characterized in that: emulsified acid component by diesel oil 6 parts, emulsifying agent 0.06 ~ 0.15 part, acid solution multipurpose additive 0.7 ~ 2.1 part, more than be 31% hydrochloric acid, each volume components sum of emulsified acid is 20 ~ 40 parts.
3. the slow low frictional resistance acid fluid system of a kind of acid fracturing according to claim 1, it is characterized in that: gelled acid component is by viscosifying agent 0.16 ~ 0.64 part, cleanup additive 0.8 ~ 0.6 part, high-temperature corrosion inhibitor 2.4 ~ 3.6 parts, Fe stabilizer 0.8 ~ 0.6 part, more than be 31% hydrochloric acid, each volume components sum of gelled acid is 60 ~ 80 parts.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310552852.7A CN104629711A (en) | 2013-11-08 | 2013-11-08 | Slow-speed low-friction acid solution system for acid fracturing |
| PCT/CN2014/084505 WO2015067085A1 (en) | 2013-11-08 | 2014-08-15 | Retardant low-friction acid liquid system for acid fracturing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310552852.7A CN104629711A (en) | 2013-11-08 | 2013-11-08 | Slow-speed low-friction acid solution system for acid fracturing |
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| CN104629711A true CN104629711A (en) | 2015-05-20 |
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| CN201310552852.7A Pending CN104629711A (en) | 2013-11-08 | 2013-11-08 | Slow-speed low-friction acid solution system for acid fracturing |
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| WO (1) | WO2015067085A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106520098A (en) * | 2015-09-10 | 2017-03-22 | 中国石油化工股份有限公司 | Acidic stuck freeing solution for drilling and preparation method thereof |
| CN107868660A (en) * | 2016-09-23 | 2018-04-03 | 深圳市百勤石油技术有限公司 | A kind of emulsification acid solution of oil-gas reservoir acidifying and preparation method thereof |
| CN108641700A (en) * | 2018-05-18 | 2018-10-12 | 陕西省石油化工研究设计院 | A kind of multiple-effect fracturing aid and the preparation method and application thereof |
| CN109135716A (en) * | 2018-08-22 | 2019-01-04 | 中国石油天然气股份有限公司 | A kind of viscous acid, mix acid liquor system and the method for reducing emulsified acid frictional resistance |
| CN110724514A (en) * | 2018-07-17 | 2020-01-24 | 中国石油化工股份有限公司 | Nano high-temperature emulsified gelled acid and preparation method thereof |
| CN111171802A (en) * | 2018-11-13 | 2020-05-19 | 中国石油化工股份有限公司 | Preparation method of acid liquor system |
| CN111253928A (en) * | 2018-11-30 | 2020-06-09 | 中国石油化工股份有限公司 | Graded slow-speed crosslinking emulsified acid and preparation method thereof |
| CN115678523A (en) * | 2021-07-30 | 2023-02-03 | 中国石油天然气股份有限公司 | Acidification blockage relieving system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106520098A (en) * | 2015-09-10 | 2017-03-22 | 中国石油化工股份有限公司 | Acidic stuck freeing solution for drilling and preparation method thereof |
| CN107868660A (en) * | 2016-09-23 | 2018-04-03 | 深圳市百勤石油技术有限公司 | A kind of emulsification acid solution of oil-gas reservoir acidifying and preparation method thereof |
| CN107868660B (en) * | 2016-09-23 | 2022-07-22 | 深圳市百勤石油技术有限公司 | Emulsified acid liquid for acidification of oil and gas reservoir and preparation method thereof |
| CN108641700B (en) * | 2018-05-18 | 2020-10-09 | 陕西省石油化工研究设计院 | Multi-effect fracturing additive and preparation method and application thereof |
| CN108641700A (en) * | 2018-05-18 | 2018-10-12 | 陕西省石油化工研究设计院 | A kind of multiple-effect fracturing aid and the preparation method and application thereof |
| CN110724514A (en) * | 2018-07-17 | 2020-01-24 | 中国石油化工股份有限公司 | Nano high-temperature emulsified gelled acid and preparation method thereof |
| CN110724514B (en) * | 2018-07-17 | 2022-03-08 | 中国石油化工股份有限公司 | Nano high-temperature emulsified gelled acid and preparation method thereof |
| CN109135716A (en) * | 2018-08-22 | 2019-01-04 | 中国石油天然气股份有限公司 | A kind of viscous acid, mix acid liquor system and the method for reducing emulsified acid frictional resistance |
| CN111171802A (en) * | 2018-11-13 | 2020-05-19 | 中国石油化工股份有限公司 | Preparation method of acid liquor system |
| CN111253928A (en) * | 2018-11-30 | 2020-06-09 | 中国石油化工股份有限公司 | Graded slow-speed crosslinking emulsified acid and preparation method thereof |
| CN111253928B (en) * | 2018-11-30 | 2022-08-19 | 中国石油化工股份有限公司 | Graded slow-speed crosslinking emulsified acid and preparation method thereof |
| CN115678523A (en) * | 2021-07-30 | 2023-02-03 | 中国石油天然气股份有限公司 | Acidification blockage relieving system |
| CN115678523B (en) * | 2021-07-30 | 2024-03-01 | 中国石油天然气股份有限公司 | Acid-based blocking removal system |
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| WO2015067085A1 (en) | 2015-05-14 |
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