CN109456751B - Low-damage thickening acid and preparation method and application thereof - Google Patents
Low-damage thickening acid and preparation method and application thereof Download PDFInfo
- Publication number
- CN109456751B CN109456751B CN201811565010.4A CN201811565010A CN109456751B CN 109456751 B CN109456751 B CN 109456751B CN 201811565010 A CN201811565010 A CN 201811565010A CN 109456751 B CN109456751 B CN 109456751B
- Authority
- CN
- China
- Prior art keywords
- acid
- thickening
- iron ion
- low
- damage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
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
Abstract
The low damage thickening acid comprises the following components in percentage by mass based on the total weight of the thickening acid liquid: 2-10% of an acid liquid thickener, 1-4% of an acidification corrosion inhibitor, 1-3% of an iron ion stabilizer, 10-28% of an acid and the balance of water; the viscoelastic surfactant is used as a thickening agent in acidification, so that the acid rock reaction rate can be effectively delayed, acid-etched earthworm pores with good flow conductivity are generated, and deep acidification is realized; compared with polymer thickening acid, the surfactant thickening acid system has the advantages of easily obtained raw materials, simple preparation, easy gel breaking, little damage to stratum, no addition of cross-linking agent and easy flowback.
Description
Technical Field
The invention relates to a low-damage thickening acid and a preparation method and application thereof, belonging to the technical field of acid fracturing of oil and gas fields.
Technical Field
Along with the rapid development of economy, the demand of oil gas in China is more and more large, and in addition, the development of old oil fields in the east part enters the middle and later stages, the effect of conventional yield increasing measures is very little, so that the unconventional oil and gas fields become hot spots for exploration and development. Acidification technology is widely adopted as an effective production-increasing transformation measure, and the acidification effect mainly depends on the performance of the acidification working fluid.
However, conventional acid solutions suffer from a number of disadvantages, such as too rapid a reaction of the acid rock, resulting in premature consumption of the acid solution and failure to reach the intended formation; the filtration rate is high, and the construction cost is increased; corroding pipelines and affecting oil and gas production. A great deal of research has been conducted on the development of novel acid systems for the purpose of uniform deep acidification, including gelled acids, self-diverting acids, emulsified acids and foamed acids. Among them, the gelled acid is considered to be a novel acid system with great potential. The thickener is one of the most important additives of the thickening acid, and is mainly used for reducing H by increasing the viscosity of the acid liquor+The diffusion rate to the rock surface delays the reaction rate between the acid liquor and the stratum rock to realize deep acidification.
There are many common acid viscosifiers today that are similar to water-based fracturing fluid viscosifiers, such as guar gum and its derivatives, cellulose and its derivatives, synthetic polymers, and the like. However, natural high molecular polymers and their derivatives have poor stability in acid solutions and are easily biodegradable, so synthetic polymers are mainly used on site. However, the synthetic polymer also has the defects of poor temperature resistance and salt resistance, and residual polymer is remained in the stratum to block an acid etching channel, so that stratum pollution is caused, and the stratum reconstruction effect is reduced. These all place higher demands on the acid thickener.
Disclosure of Invention
Aiming at the problems that the existing polymer thickening acid has poor temperature resistance and salt resistance and is easy to remain in a stratum to damage the stratum, the invention provides the low-damage thickening acid and the preparation method and the application thereof.
The technical scheme of the invention is as follows:
the low damage thickening acid comprises the following components in percentage by mass based on the total weight of the thickening acid liquid: 2-10% of acid liquid thickener, 1-4% of acidification corrosion inhibitor, 1-3% of iron ion stabilizer, 10-28% of acid (calculated by pure acid) and the balance of water.
Further, the acid thickener is prepared by mixing oleamidopropyl dimethylamine (FLY) and hexadecyl dimethyl tertiary amine (FL16) or tetradecyl dimethyl tertiary amine (FL14) according to the weight ratio of 1.5-3: 1 to 2.5 in mass ratio.
Further, the acid is hydrochloric acid, and the concentration is 10-36%.
Further, the iron ion stabilizer is prepared from citric acid and sodium isotretinoin according to the weight ratio of 4: 1, in the mass ratio.
A preparation method of low-damage thickening acid comprises the steps of uniformly mixing acid and water in a container, sequentially adding a thickening agent, an acidification corrosion inhibitor and an iron ion stabilizer, and uniformly stirring at the normal temperature at the speed of 200r/min to obtain the low-damage thickening acid.
Further, the low damage thickening acid is used for the acidification acid fracturing stimulation of the carbonate oil and gas reservoir.
The invention has the beneficial effects that:
the viscoelastic surfactant is used as a thickening agent in acidification, so that the acid rock reaction rate can be effectively delayed, acid-etched earthworm pores with good flow conductivity are generated, and deep acidification is realized; compared with polymer thickening acid, the surfactant thickening acid system has the advantages of easily obtained raw materials, simple preparation, easy gel breaking, little damage to stratum, no addition of cross-linking agent and easy flowback.
With the consumption of acid and the increase of pH, surfactant molecules begin to aggregate and entangle with each other to form worm-like micelles, so that the viscosity of the acid solution is further enhanced, the reaction rate of acid rock can be effectively delayed, and deep acidification is realized; meanwhile, the mixing of the residual acid and the hydrocarbon substances can destroy wormlike micelles of surfactant molecules, realize automatic gel breaking and effectively solve the problem of polymer residues of polymer thickening acid.
The concrete expression is as follows: (1) the thickening agent has good thickening effect, and the viscosity can reach 40mPa.s at the addition of 2 percent; (2) the shear stability of the thickening acid is good and is 170s-1And 511s-1Shearing for 90min under the condition of no less than 95 percent of viscosity; (3) under the condition of 120 ℃, the retarding action is 3-4 times of that of the conventional acid liquor, so that the acid rock reaction can be effectively delayed, and the deep acidification is realized; (4) after the acid rock reaction, the system can automatically break gel when meeting hydrocarbon substances, and the viscosity of gel breaking liquid is lower than 5mPa.s, so that the gel breaking liquid is easy to flow back; (5) the acid liquor has good compatibility with various additives such as iron ion stabilizer and corrosion inhibitor, does not produce residue or flocculate, and has little damage to the stratum.
Drawings
FIG. 1 is the results of shear stability performance evaluation of the product of example 1;
FIG. 2 is the result of evaluating the temperature stability of the product of example 1;
FIG. 3 shows the evaluation results of the low-injury performance of the product of example 1, wherein a is a thickening acid of a polymer type and b is a thickening acid of a surfactant type.
Detailed Description
The present invention will be described in detail by the following embodiments in order to fully describe the invention. The following examples are intended to further illustrate the invention, but not to limit it. The concentrations and contents in the examples are given in mass%.
Example 1
A low damage thickening acid comprises the following components in percentage by mass: 4% of acid liquor thickener, 1% of acidification corrosion inhibitor, 1% of iron ion stabilizer, 18% of hydrochloric acid, calculated as pure acid, and the balance of water;
the acid liquid thickener is a mixture of oleamidopropyl dimethylamine (FLY) and hexadecyl dimethyl tertiary amine (FL16), and the mass ratio is 2.75: 1.25;
the iron ion stabilizer is a mixture of citric acid and sodium isotretinoin, and the mass ratio of the iron ion stabilizer to the sodium isotretinoin is 4: 1.
the preparation method of the low-damage thickening acid is realized by the following steps:
the method comprises the steps of uniformly mixing a mixture of oleamidopropyl dimethylamine (FLY) and hexadecyl dimethyl tertiary amine (FL16) and acid liquor in a container according to a proportion, sequentially adding 1% of acidification corrosion inhibitor and 1% of iron ion stabilizer, and uniformly stirring after mixing to form the thickening acid liquor.
The shear stability of the product of example 1 was evaluated on a HAKKE MARS III rheometer and was good at 170s-1And 511s-1Shearing for 90min under the condition of no less than 1 percent, wherein the viscosity can be kept over 97.6 percent; at 170s-1The product of example 1 was then temperature scanned and found to be 170s-1The viscosity at 120 ℃ can reach 54mPa.s, see FIG. 2.
Comparing the product-displaced core of example 1 with the acid-displaced core with a polymer as viscosifier, the product of example 1 was found to be less damaging to the formation, see fig. 3.
Example 2
A low damage thickening acid comprises the following components in percentage by mass: 2% of an acid liquid thickener, 2% of an acidification corrosion inhibitor, 2% of an iron ion stabilizer, 18% of hydrochloric acid, calculated as pure acid, and the balance of water;
the acid liquid thickener is a mixture of oleamidopropyl dimethylamine (FLY) and hexadecyl dimethyl tertiary amine (FL16), and the mass ratio is 2.75: 1.25;
the iron ion stabilizer is a mixture of citric acid and sodium isotretinoin, and the mass ratio of the iron ion stabilizer to the sodium isotretinoin is 4: 1.
the preparation method of the low-damage thickening acid is realized by the following steps:
the method comprises the steps of uniformly mixing a mixture of oleamidopropyl dimethylamine (FLY) and hexadecyl dimethyl tertiary amine (FL16) and acid liquor in a container according to a proportion, sequentially adding 2% of an acidification corrosion inhibitor and 2% of an iron ion stabilizer, and uniformly stirring after mixing to form the thickening acid liquor.
The shear stability of the product of example 2 was evaluated on a HAKKE MARS III rheometer and was good at 170s-1And 511s-1Shearing for 90min under the condition of no less than 95.5% of viscosity; at 170s-1The product of example 2 was then temperature scanned and found to be 170s-1The viscosity can reach 40mPa.s at 120 ℃.
Example 3
A low damage thickening acid comprises the following components in percentage by mass: 3% of an acid liquid thickener, 2% of an acidification corrosion inhibitor, 1% of an iron ion stabilizer, 15% of hydrochloric acid, calculated as pure acid, and the balance of water;
the acid liquid thickener is a mixture of oleamidopropyl dimethylamine (FLY) and hexadecyl dimethyl tertiary amine (FL16), and the mass ratio is 2.5: 1.5;
the iron ion stabilizer is a mixture of citric acid and sodium isotretinoin, and the mass ratio of the iron ion stabilizer to the sodium isotretinoin is 4: 1.
the preparation method of the low-damage thickening acid is realized by the following steps:
the method comprises the steps of uniformly mixing a mixture of oleamidopropyl dimethylamine (FLY) and hexadecyl dimethyl tertiary amine (FL16) and acid liquor in a container according to a proportion, sequentially adding 2% of an acidification corrosion inhibitor and 1% of an iron ion stabilizer, and uniformly stirring after mixing to form the thickening acid liquor.
The shear stability of the product of example 3 was evaluated on a HAKKE MARS III rheometer and was good at 170s-1And 511s-1Shearing for 90min under the condition of no less than 95.6% of viscosity; at 170s-1The product of example 3 is shown belowTemperature scan was done and found to be 170s-1The viscosity can reach 48mPa.s at 120 ℃.
Example 4
A low damage thickening acid comprises the following components in percentage by mass: 4% of an acid liquid thickener, 2% of an acidification corrosion inhibitor, 1% of an iron ion stabilizer, 15% of hydrochloric acid, calculated as pure acid, and the balance of water;
the acid liquid thickener is a mixture of oleamidopropyl dimethylamine (FLY) and hexadecyl dimethyl tertiary amine (FL16), and the mass ratio is 3: 1;
the iron ion stabilizer is a mixture of citric acid and sodium isotretinoin, and the mass ratio of the iron ion stabilizer to the sodium isotretinoin is 4: 1.
the preparation method of the low-damage thickening acid is realized by the following steps:
the method comprises the steps of uniformly mixing a mixture of oleamidopropyl dimethylamine (FLY) and hexadecyl dimethyl tertiary amine (FL16) and acid liquor in a container according to a proportion, sequentially adding 2% of an acidification corrosion inhibitor and 1% of an iron ion stabilizer, and uniformly stirring after mixing to form the thickening acid liquor.
The shear stability of the product of example 4 was evaluated on a HAKKE MARS III rheometer and was good at 170s-1And 511s-1Shearing for 90min under the condition of no less than 96.3 percent of viscosity; at 170s-1The product of example 4 was then temperature scanned and found to be 170s-1The viscosity can reach 67mPa.s at 90 ℃.
Example 5
A low damage thickening acid comprises the following components in percentage by mass: 4% of acid liquor thickener, 1% of acidification corrosion inhibitor, 1% of iron ion stabilizer, 18% of hydrochloric acid, calculated as pure acid, and the balance of water;
the acid liquid thickener is a mixture of oleamidopropyl dimethylamine (FLY) and tetradecyl dimethyl tertiary amine (FL14), and the mass ratio is 2.75: 1.25;
the iron ion stabilizer is a mixture of citric acid and sodium isotretinoin, and the mass ratio of the iron ion stabilizer to the sodium isotretinoin is 4: 1.
the preparation method of the low-damage thickening acid is realized by the following steps:
the method comprises the steps of uniformly mixing a mixture of oleamidopropyl dimethylamine (FLY) and tetradecyl dimethyl tertiary amine (FL14) and acid liquor in a container according to a ratio, sequentially adding 1% of acidification corrosion inhibitor and 1% of iron ion stabilizer, and uniformly stirring after mixing to form the thickening acid liquor.
The shear stability of the product of example 5 was evaluated on a HAKKE MARS III rheometer and was good at 170s-1And 511s-1Shearing for 90min under the condition of no less than 97.3 percent of viscosity; at 170s-1The product of example 5 was then temperature scanned and found to be 170s-1The viscosity of the product at 120 ℃ can reach 51 mPa.s.
Example 6
A low damage thickening acid comprises the following components in percentage by mass: 2% of an acid liquid thickener, 3% of an acidification corrosion inhibitor, 2% of an iron ion stabilizer, 18% of hydrochloric acid, calculated as pure acid, and the balance of water;
the acid liquid thickener is a mixture of oleamidopropyl dimethylamine (FLY) and tetradecyl dimethyl tertiary amine (FL14), and the mass ratio is 2.5: 1.5;
the iron ion stabilizer is a mixture of citric acid and sodium isotretinoin, and the mass ratio of the iron ion stabilizer to the sodium isotretinoin is 4: 1.
the preparation method of the low-damage thickening acid is realized by the following steps:
the method comprises the steps of uniformly mixing a mixture of oleamidopropyl dimethylamine (FLY) and tetradecyl dimethyl tertiary amine (FL14) and acid liquor in a container according to a ratio, sequentially adding 3% of an acidification corrosion inhibitor and 2% of an iron ion stabilizer, and uniformly stirring after mixing to form the thickening acid liquor.
The shear stability of the product of example 6 was evaluated on a HAKKE MARS III rheometer and was good at 170s-1And 511s-1Shearing for 90min under the condition of no less than 95.3 percent of viscosity; at 170s-1The product of example 6 was then temperature scanned and found to be 170s-1The viscosity can reach 46mPa.s at 90 ℃.
Example 7
A low damage thickening acid comprises the following components in percentage by mass: 3% of an acid liquid thickener, 2% of an acidification corrosion inhibitor, 1% of an iron ion stabilizer, 15% of hydrochloric acid, calculated as pure acid, and the balance of water;
the acid liquid thickener is a mixture of oleamidopropyl dimethylamine (FLY) and tetradecyl dimethyl tertiary amine (FL14), and the mass ratio is 2.75: 1.25;
the iron ion stabilizer is a mixture of citric acid and sodium isotretinoin, and the mass ratio of the iron ion stabilizer to the sodium isotretinoin is 4: 1.
the preparation method of the low-damage thickening acid is realized by the following steps:
the method comprises the steps of uniformly mixing a mixture of oleamidopropyl dimethylamine (FLY) and tetradecyl dimethyl tertiary amine (FL14) and acid liquor in a container according to a ratio, sequentially adding 2% of an acidification corrosion inhibitor and 1% of an iron ion stabilizer, and uniformly stirring after mixing to form the thickening acid liquor.
The shear stability of the product of example 7 was evaluated on a HAKKE MARS III rheometer and was good at 170s-1And 511s-1Shearing for 90min under the condition of no less than 96.8 percent of viscosity; at 170s-1The product of example 7 was then temperature scanned and found to be 170s-1The viscosity at 120 ℃ can reach 52 mPa.s.
Example 8
A low damage thickening acid comprises the following components in percentage by mass: 3% of an acid liquid thickener, 2% of an acidification corrosion inhibitor, 2% of an iron ion stabilizer, 20% of hydrochloric acid, calculated as pure acid, and the balance of water;
the acid liquid thickener is a mixture of oleamidopropyl dimethylamine (FLY) and tetradecyl dimethyl tertiary amine (FL14), and the mass ratio is 3: 1;
the iron ion stabilizer is a mixture of citric acid and sodium isotretinoin, and the mass ratio of the iron ion stabilizer to the sodium isotretinoin is 4: 1.
the preparation method of the low-damage thickening acid is realized by the following steps:
the method comprises the steps of uniformly mixing a mixture of oleamidopropyl dimethylamine (FLY) and tetradecyl dimethyl tertiary amine (FL14) and acid liquor in a container according to a ratio, sequentially adding 2% of an acidification corrosion inhibitor and 2% of an iron ion stabilizer, and uniformly stirring after mixing to form the thickening acid liquor.
The shear stability of the product of example 8 was evaluated on a HAKKE MARS III rheometer and was good at 170s-1And 511s-1Shearing for 90min under the condition of no less than 94.8% of viscosity; at 170s-1The product of example 8 was then temperature scanned and found to be 170s-1The viscosity at 120 ℃ can reach 64 mPa.s.
In the research, the viscoelastic surfactant is also used in the diverting acid, and the difference is made here to show that the diverting acid is mainly used for matrix acidification in acidification, wherein the viscoelastic surfactant mainly has tackifying effect so as to achieve the purpose of uniform acidification; the thickening acid is mainly used for acidizing and fracturing carbonate rocks, the viscoelastic surfactant mainly has the functions of thickening, retarding and fluid loss reduction so as to achieve the purpose of deep acidizing, and the purposes of the thickening acid and the fluid loss reduction are fundamentally different.
Claims (3)
1. A low damage thickening acid comprises the following components in percentage by mass: 4% of acid liquor thickener, 1% of acidification corrosion inhibitor, 1% of iron ion stabilizer, 18% of hydrochloric acid, calculated as pure acid, and the balance of water;
the acid liquid thickener is a mixture of oleamidopropyl dimethylamine (FLY) and hexadecyl dimethyl tertiary amine (FL16) with the mass ratio of 2.75: 1.25;
the iron ion stabilizer is a mixture of citric acid and sodium isotretinoin, and the mass ratio of the citric acid to the sodium isotretinoin is 4: 1.
2. The method for preparing a low-damage thickening acid as claimed in claim 1, wherein the low-damage thickening acid is prepared by mixing the acid and water uniformly in a container, adding the thickening agent, the acidification corrosion inhibitor and the iron ion stabilizer in sequence, and stirring uniformly at a speed of 200r/min at normal temperature.
3. The use of a low damage viscosifying acid of claim 1 in an acidizing acid fracturing stimulation of a carbonate reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811565010.4A CN109456751B (en) | 2018-12-20 | 2018-12-20 | Low-damage thickening acid and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811565010.4A CN109456751B (en) | 2018-12-20 | 2018-12-20 | Low-damage thickening acid and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109456751A CN109456751A (en) | 2019-03-12 |
| CN109456751B true CN109456751B (en) | 2022-01-25 |
Family
ID=65614133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811565010.4A Active CN109456751B (en) | 2018-12-20 | 2018-12-20 | Low-damage thickening acid and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109456751B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110609974B (en) * | 2019-09-09 | 2022-09-16 | 西南石油大学 | Acid fracturing fracture dynamic fluid loss calculation method considering wormhole expansion |
| CN110951475A (en) * | 2019-12-31 | 2020-04-03 | 西南石油大学 | Ultra-high temperature resistant low-viscosity low-corrosion emulsifier, emulsified acid system and preparation method thereof |
| CN112457840A (en) * | 2020-11-04 | 2021-03-09 | 中国石油集团渤海钻探工程有限公司 | Working fluid for acid fracturing of carbonate rock geothermal well |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020983A (en) * | 2009-09-12 | 2011-04-20 | 中国石油化工股份有限公司 | Viscosity-variable diverting acid for improving stratigraphic acidified section |
| CN102453480A (en) * | 2010-10-22 | 2012-05-16 | 中国石油天然气集团公司 | Clean viscous acid for acid fracturing of carbonate reservoir |
| CN103951599A (en) * | 2014-05-14 | 2014-07-30 | 中国石油化工股份有限公司 | Synthesis method for surface-active thickening agent for salt-free type clean fracturing fluid |
| CN104861957A (en) * | 2015-05-08 | 2015-08-26 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Recoverable instant thickening acid |
| CN105713594A (en) * | 2016-01-21 | 2016-06-29 | 西安石油大学 | Viscous acid and preparation method thereof |
| CN106634938A (en) * | 2016-12-07 | 2017-05-10 | 中国石油天然气股份有限公司 | Compound type temperature-resisting viscoelastic self-diverting acid as well as preparation method and application thereof |
| CN108102633A (en) * | 2017-11-17 | 2018-06-01 | 中国石油天然气股份有限公司 | A kind of viscoplasticity acid-base fracturing fluid and preparation method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5258137A (en) * | 1984-12-24 | 1993-11-02 | The Dow Chemical Company | Viscoelastic surfactant based foam fluids |
| US5551516A (en) * | 1995-02-17 | 1996-09-03 | Dowell, A Division Of Schlumberger Technology Corporation | Hydraulic fracturing process and compositions |
| US7244698B2 (en) * | 2004-07-30 | 2007-07-17 | Nalco Company | Viscoelastic surfactant composition having improved rheological properties and method of using for treating subterranean formations |
| CN102453481B (en) * | 2011-01-21 | 2013-09-18 | 中国石油大学(北京) | Acidic visco-elastic fluid, its preparation method and application thereof |
| CN103773354A (en) * | 2014-02-21 | 2014-05-07 | 亿城淄博石油陶粒制造有限公司 | Thickening agent applicable to surfactant fracturing liquid and online cross-linking factory operation method |
| CN104449647B (en) * | 2014-11-25 | 2017-04-05 | 中国石油天然气股份有限公司 | Clean fracturing fluid complex thickener, fracturing fluid and preparation method thereof |
| CN104910037B (en) * | 2015-06-02 | 2017-03-29 | 中国石油天然气股份有限公司 | A kind of preparation method of amide-type table live acid thickening agent |
-
2018
- 2018-12-20 CN CN201811565010.4A patent/CN109456751B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020983A (en) * | 2009-09-12 | 2011-04-20 | 中国石油化工股份有限公司 | Viscosity-variable diverting acid for improving stratigraphic acidified section |
| CN102453480A (en) * | 2010-10-22 | 2012-05-16 | 中国石油天然气集团公司 | Clean viscous acid for acid fracturing of carbonate reservoir |
| CN103951599A (en) * | 2014-05-14 | 2014-07-30 | 中国石油化工股份有限公司 | Synthesis method for surface-active thickening agent for salt-free type clean fracturing fluid |
| CN104861957A (en) * | 2015-05-08 | 2015-08-26 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Recoverable instant thickening acid |
| CN105713594A (en) * | 2016-01-21 | 2016-06-29 | 西安石油大学 | Viscous acid and preparation method thereof |
| CN106634938A (en) * | 2016-12-07 | 2017-05-10 | 中国石油天然气股份有限公司 | Compound type temperature-resisting viscoelastic self-diverting acid as well as preparation method and application thereof |
| CN108102633A (en) * | 2017-11-17 | 2018-06-01 | 中国石油天然气股份有限公司 | A kind of viscoplasticity acid-base fracturing fluid and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109456751A (en) | 2019-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109456751B (en) | Low-damage thickening acid and preparation method and application thereof | |
| US6046140A (en) | Acid gels for fracturing subterranean formations | |
| US9328285B2 (en) | Methods using low concentrations of gas bubbles to hinder proppant settling | |
| US6637517B2 (en) | Compositions containing aqueous viscosifying surfactants and methods for applying such compositions in subterranean formations | |
| US7159659B2 (en) | Viscoelastic surfactant fluids and associated acidizing methods | |
| US8633255B2 (en) | Saponified fatty acids as breakers for viscoelastic surfactant-gelled fluids | |
| US5547026A (en) | Crosslinked guar based blocking gel system for use at low to high temperatures | |
| CA3093615C (en) | Anti-freezing clear fracturing fluid and preparation method thereof | |
| US7939471B2 (en) | Subterranean treatment fluids comprising viscoelastic surfactant gels | |
| US20070142235A1 (en) | Process for oil recovery using surfactant gels | |
| US20080161210A1 (en) | Subterranean treatment fluids comprising viscoelastic surfactant gels | |
| CN104194766B (en) | Clean fracturing fluid and preparation method thereof | |
| US4265311A (en) | Methods of water flooding and fracturing using clean, non-damaging fracturing fluids | |
| US11279866B2 (en) | Boosters for breakers containing iron compounds | |
| CN103820100A (en) | Gelled acid used for acid fracturing of high-temperature fractured-vuggy type carbonate reservoir | |
| AU2017401563B2 (en) | Lost circulation pill for severe losses using viscoelastic surfactant technology | |
| CN102516976A (en) | Preparation method of multi-component organic cross-linked acid liquid | |
| CN109337663A (en) | Low permeability reservoir continuous mixed displacement of reservoir oil type fracturing fluid and its preparation method and application | |
| CN105331348A (en) | Homogeneous-phase microemulsion oil-displacing agent applied to low-permeation oil field and preparation method of homogeneous-phase microemulsion oil-displacing agent | |
| CN101831284A (en) | Clean polymer-free carrier fluid | |
| CN105086990A (en) | Composite acid fracturing working fluid and preparation method thereof | |
| CN113652222B (en) | Temperature-resistant salt-tolerant anionic surfactant clean fracturing fluid and preparation method thereof | |
| US10125308B1 (en) | Saltwater-based fracturing fluid | |
| CN106893573A (en) | A kind of biological fracturing fluid system and its preparation and application | |
| CN106675544A (en) | Novel clean fracturing fluid system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220718 Address after: No. 47, zhangkang village, Guodu Street office, Chang'an District, Xi'an, Shaanxi 710119 Patentee after: Shaanxi shunjiu Environmental Protection Technology Co.,Ltd. Address before: 610500, Xindu Avenue, Xindu District, Sichuan, Chengdu, 8 Patentee before: SOUTHWEST PETROLEUM University Effective date of registration: 20220718 Address after: 716099 room 702, unit 1, building 11, Hanlin mansion, Baota District, Yan'an City, Shaanxi Province Patentee after: Shaanxi zhixiangtuo Industrial Co.,Ltd. Address before: No. 47, zhangkang village, Guodu Street office, Chang'an District, Xi'an, Shaanxi 710119 Patentee before: Shaanxi shunjiu Environmental Protection Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right |