CN111253929B - Diverting agent for high-temperature acid - Google Patents
Diverting agent for high-temperature acid Download PDFInfo
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- CN111253929B CN111253929B CN202010091809.5A CN202010091809A CN111253929B CN 111253929 B CN111253929 B CN 111253929B CN 202010091809 A CN202010091809 A CN 202010091809A CN 111253929 B CN111253929 B CN 111253929B
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- percent
- diverting agent
- deionized water
- temperature
- diverter
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- 239000002253 acid Substances 0.000 title claims abstract description 40
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 33
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000008367 deionised water Substances 0.000 claims abstract description 19
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 19
- PWVUXRBUUYZMKM-UHFFFAOYSA-N 2-(2-hydroxyethoxy)ethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCOCCO PWVUXRBUUYZMKM-UHFFFAOYSA-N 0.000 claims abstract description 17
- VIXPKJNAOIWFMW-UHFFFAOYSA-M dihexadecyl(dimethyl)azanium;bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)CCCCCCCCCCCCCCCC VIXPKJNAOIWFMW-UHFFFAOYSA-M 0.000 claims abstract description 17
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims abstract description 16
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims abstract description 16
- 229960003237 betaine Drugs 0.000 claims abstract description 16
- CTXGTHVAWRBISV-UHFFFAOYSA-N 2-hydroxyethyl dodecanoate Chemical compound CCCCCCCCCCCC(=O)OCCO CTXGTHVAWRBISV-UHFFFAOYSA-N 0.000 claims abstract description 14
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims abstract description 14
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims abstract description 14
- MHZDONKZSXBOGL-UHFFFAOYSA-N propyl dihydrogen phosphate Chemical compound CCCOP(O)(O)=O MHZDONKZSXBOGL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000002736 nonionic surfactant Substances 0.000 abstract description 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 abstract description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 235000010216 calcium carbonate Nutrition 0.000 description 3
- 238000004090 dissolution Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
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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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- 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Detergent Compositions (AREA)
Abstract
The invention discloses a diverting agent for high-temperature acid, which comprises the following raw materials in percentage by weight: 18-22% of oleamide propyl phosphate betaine, 16-22% of isopropanol, 6-12% of dicetyl dimethyl ammonium bromide, 9-13% of diethylene glycol stearate, 3-6% of ethylene glycol monolaurate and the balance of deionized water. The temperature resistance of the acid diverter can be effectively improved by adopting the double-chain quaternary ammonium salt and the nonionic surfactant under the betaine system.
Description
Technical Field
The invention belongs to the technical field of chemical industry, and particularly relates to a diverting agent for high-temperature acid.
Background
The acidizing operation is a process of dissolving and eroding the pores and cracks of the stratum by using acid liquor so as to improve the permeability of the stratum. In the acidizing operation, acid liquid preferentially enters a stratum with high permeability, and an interval with low permeability is not treated. In this case, a diverter needs to be added to solve the problem.
In pores and cracks of a stratum, HCl in acid liquor reacts with CaCO3 in rocks, HCl is continuously consumed, and Ca2+ is continuously generated; when the pH value is increased to a certain value (generally about 2), Ca2+ enables molecules of the diverting agent to be mutually connected, the viscosity of the acid liquor is obviously increased, finally, gel is formed to block gaps or cracks where the acid liquor is located, and the rest acid liquor is diverted to an area which is not acidified, so that the acidification is diverted.
However, the existing diverting agent generally adopts a viscoelastic surfactant type acidifying diverting agent, which has a great problem in temperature resistance, and particularly, when the temperature exceeds 120 ℃, the diverting agent is difficult to form colloid, thereby causing the failure of the diverting agent. Therefore, a high temperature resistant diverting agent for acid is urgently needed.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a diverting agent for high temperature acid, which has good high temperature resistance and is suitable for use under high temperature conditions, in order to overcome the defects of the prior art.
The technical scheme adopted by the invention is as follows: a diverting agent for high-temperature acid comprises the following raw materials in percentage by weight: 18-22% of oleamide propyl phosphate betaine, 16-22% of isopropanol, 6-12% of dicetyl dimethyl ammonium bromide, 9-13% of diethylene glycol stearate, 3-6% of ethylene glycol monolaurate and the balance of deionized water.
Preferably, the diverting agent for high-temperature acid comprises 20% of oleamide propyl phosphate betaine, 10% of dicetyl dimethyl ammonium bromide, 10% of diethylene glycol stearate, 5% of ethylene glycol monolaurate and 20% of isopropanol by weight percentage, and the balance of deionized water.
Preferably, the diverting agent for high-temperature acid comprises 19% of oleamide propyl phosphate betaine, 6% of dicetyl dimethyl ammonium bromide, 9% of diethylene glycol stearate, 6% of ethylene glycol monolaurate and 21% of isopropanol by weight percentage, and the balance of deionized water.
Preferably, the diverting agent for high-temperature acid comprises 22% of oleamide propyl phosphate betaine, 11% of dicetyl dimethyl ammonium bromide, 12% of diethylene glycol stearate, 4% of ethylene glycol monolaurate and 16% of isopropanol by weight percentage, and the balance of deionized water.
Preferably, the preparation method of the diverting agent for the high-temperature acid comprises the following steps:
(1) selecting isopropanol, diethylene glycol stearate and dihexadecyl dimethyl ammonium bromide, adding deionized water, and uniformly stirring at a constant temperature of 70 ℃ until the materials are fully dissolved;
(2) then adding oleamide propyl phosphate betaine, ethylene glycol monolaurate and deionized water, and continuously stirring at the constant temperature of 70 ℃ until the materials are fully dissolved to obtain the diverting agent for the high-temperature acid.
The temperature resistance of the acid diverter can be effectively improved by adopting the double-chain quaternary ammonium salt and the nonionic surfactant under the betaine system.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1
The diverting agent for high-temperature acid provided by this embodiment is prepared by selecting, by weight, 20% of isopropyl alcohol, 10% of diethylene glycol stearate and 10% of dihexadecyl dimethyl ammonium bromide, adding 10% of deionized water, uniformly stirring for 1 hour at a constant temperature of 70 ℃ until the isopropyl alcohol, the diethylene glycol stearate and the dihexadecyl dimethyl ammonium bromide are sufficiently and uniformly dissolved, adding 20% of oleamide propyl phosphate betaine, 5% of ethylene glycol monolaurate and 25% of deionized water after uniform dissolution, and continuously stirring for 1 hour at a constant temperature of 70 ℃ until the mixtures are sufficiently and uniformly dissolved.
Example 2
The high-temperature acid steering agent provided by this embodiment is prepared by selecting, by weight, 21% of isopropyl alcohol, 9% of diethylene glycol stearate, and 6% of dicetyl dimethyl ammonium bromide, adding 12% of deionized water, uniformly stirring for 1 hour at a constant temperature of 70 ℃ until the isopropyl alcohol, the diethylene glycol stearate, and the dicetyl dimethyl ammonium bromide are sufficiently and uniformly dissolved, adding 19% of oleamide propyl phosphate betaine, 6% of ethylene glycol monolaurate, and 27% of deionized water after uniform dissolution, and continuously stirring for 1 hour at a constant temperature of 70 ℃ until the mixtures are sufficiently and uniformly dissolved.
Example 3
The diverting agent for the high-temperature acid provided by the embodiment is prepared by selecting 16% of isopropanol, 12% of diethylene glycol stearate and 11% of dicetyl dimethyl ammonium bromide according to the weight percentage, adding 15% of deionized water, uniformly stirring for 1h at a constant temperature of 70 ℃ until the isopropanol, the diethylene glycol stearate and the dicetyl dimethyl ammonium bromide are sufficiently and uniformly dissolved, adding 22% of oleamide propyl phosphate betaine, 4% of ethylene glycol monolaurate and 20% of deionized water after uniform dissolution, and continuously stirring for 1h at a constant temperature of 70 ℃ until the mixture is sufficiently and uniformly dissolved.
Detection example 1:
example 1 is the best example, and the diverting agent for high-temperature acid and the diverting agent for traditional acid prepared in example 1 are selected for detection respectively:
400g of 20% hydrochloric acid is added into a 5L plastic beaker, 6% of the diverting agent for high-temperature acid prepared in example 1 is added, the mixture is stirred uniformly until the mixture is fully dissolved, 120g of analytically pure calcium carbonate is added in batches, a glass rod is used for stirring, foam overflow is prevented, the mixture is stirred until the hydrochloric acid is reacted, the liquid level is lower than 500ml, residual acid is taken out, shearing is carried out by a rheometer at the shearing rate of 170s < -1 >, the shearing time is 1 hour, and the viscosity is detected.
Detection example 2:
example 1 is the best example, and the diverting agent for high-temperature acid and the diverting agent for traditional acid prepared in example 1 are selected for detection respectively:
400g of 20% hydrochloric acid is added into a 5L plastic beaker, 6% of the diverting agent for high-temperature acid prepared in example 1 is added, the mixture is stirred uniformly until the mixture is fully dissolved, 120g of analytically pure calcium carbonate is added in batches, a glass rod is used for stirring, foam overflow is prevented, the mixture is stirred until the hydrochloric acid is reacted, the liquid level is lower than 500ml, residual acid is taken out, the temperature is raised to 160 ℃ at the shearing rate of 170s < -1 > by using a rheometer, then the mixture is sheared for 1 hour, and the viscosity is detected.
Table 1: the viscosity of the conventional diverting agent for acid was compared with those of test example 1 and test example 2 as shown in the following table
From table 1 it can be seen that:
the conventional acid diverter has good viscosity at normal temperature, but the viscosity is too low to be slightly higher than that of water at 160 ℃, and at the temperature, enough viscosity cannot be formed to block gaps, so that the diversion effect is lost.
The high-temperature acid diverting agent has the viscosity of 150map.s at 160 ℃, and can well block gaps, thereby realizing the diverting function at the temperature.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered within the scope of the present invention.
Claims (5)
1. A diverter for high-temperature acid is characterized in that: comprises the following raw materials in percentage by weight: 18-22% of oleamide propyl phosphate betaine, 16-22% of isopropanol, 6-12% of dicetyl dimethyl ammonium bromide, 9-13% of diethylene glycol stearate, 3-6% of ethylene glycol monolaurate and the balance of deionized water.
2. The diverter according to claim 1, wherein the diverter is characterized in that: the diverting agent for the high-temperature acid comprises 20 percent of oleamide propyl phosphate betaine, 10 percent of dicetyl dimethyl ammonium bromide, 10 percent of diethylene glycol stearate, 5 percent of ethylene glycol monolaurate and 20 percent of isopropanol by weight percentage, and the balance being deionized water.
3. The diverter according to claim 1, wherein the diverter is characterized in that: the diverting agent for the high-temperature acid comprises 19 weight percent of oleamide propyl phosphate betaine, 6 weight percent of dicetyl dimethyl ammonium bromide, 9 weight percent of diethylene glycol stearate, 6 weight percent of ethylene glycol monolaurate, 21 weight percent of isopropanol and the balance of deionized water.
4. The diverter according to claim 1, wherein the diverter is characterized in that: the diverting agent for the high-temperature acid comprises 22 percent of oleamide propyl phosphate betaine, 11 percent of dicetyl dimethyl ammonium bromide, 12 percent of diethylene glycol stearate, 4 percent of ethylene glycol monolaurate and 16 percent of isopropanol by weight percentage, and the balance being deionized water.
5. The method for producing a diverting agent for high-temperature acid according to any of claims 1 to 4, characterized in that: the method comprises the following steps:
(1) selecting isopropanol, diethylene glycol stearate and dihexadecyl dimethyl ammonium bromide, adding deionized water, stirring at constant temperature of 70 deg.C until fully dissolved,
(2) then adding oleamide propyl phosphate betaine, ethylene glycol monolaurate and deionized water, and continuously stirring at the constant temperature of 70 ℃ until the materials are fully dissolved to obtain the diverting agent for the high-temperature acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010091809.5A CN111253929B (en) | 2020-02-13 | 2020-02-13 | Diverting agent for high-temperature acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010091809.5A CN111253929B (en) | 2020-02-13 | 2020-02-13 | Diverting agent for high-temperature acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111253929A CN111253929A (en) | 2020-06-09 |
| CN111253929B true CN111253929B (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010091809.5A Active CN111253929B (en) | 2020-02-13 | 2020-02-13 | Diverting agent for high-temperature acid |
Country Status (1)
| Country | Link |
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| CN (1) | CN111253929B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2713033A (en) * | 1952-09-15 | 1955-07-12 | Dow Chemical Co | Acidizing oil-bearing formations |
| US3939911A (en) * | 1975-03-14 | 1976-02-24 | Texaco Inc. | Surfactant oil recovery process usable in high temperature formations containing water having high concentrations of polyvalent ions |
| US6929070B2 (en) * | 2001-12-21 | 2005-08-16 | Schlumberger Technology Corporation | Compositions and methods for treating a subterranean formation |
| CA2469988C (en) * | 2003-12-05 | 2010-10-26 | Schlumberger Canada Limited | Carbon dioxide foamed fluids |
| US7237608B2 (en) * | 2004-10-20 | 2007-07-03 | Schlumberger Technology Corporation | Self diverting matrix acid |
| US9505970B2 (en) * | 2014-05-14 | 2016-11-29 | Flotek Chemistry, Llc | Methods and compositions for use in oil and/or gas wells |
| CN108102633B (en) * | 2017-11-17 | 2020-10-09 | 中国石油天然气股份有限公司 | Viscoelastic acid-based fracturing fluid and preparation method thereof |
-
2020
- 2020-02-13 CN CN202010091809.5A patent/CN111253929B/en active Active
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| CN111253929A (en) | 2020-06-09 |
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