CN108570317B - Microemulsion for relieving water lock injury of low-permeability reservoir - Google Patents
Microemulsion for relieving water lock injury of low-permeability reservoir Download PDFInfo
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- CN108570317B CN108570317B CN201710149122.0A CN201710149122A CN108570317B CN 108570317 B CN108570317 B CN 108570317B CN 201710149122 A CN201710149122 A CN 201710149122A CN 108570317 B CN108570317 B CN 108570317B
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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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
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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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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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
- C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
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Abstract
The invention discloses a microemulsion for relieving water lock injury of a low-permeability reservoir, which consists of the following components in percentage by weight: 10-20% of nonionic surfactant, 10-15% of anionic surfactant, 8-15% of stabilizer, 6-10% of auxiliary agent, 8% of diesel oil and 32-58% of water. The microemulsion for relieving water lock damage of the low-permeability reservoir has high oil-water mutual solubility, does not have oil-water two-phase interfacial tension, can effectively treat water invasion damage of a low-permeability reservoir near a well zone, and can recover the oil phase permeability to be more than or equal to 90 percent. Has high salinity tolerance of over 20000 mg/L. The water invasion damage can be relieved, the colloidal asphaltene precipitated from the near wellbore zone can be dissolved, and the dissolution rate is more than 20 mg/L. The microemulsion for relieving water lock damage of the low-permeability reservoir can effectively prevent and relieve water lock damage and protect an oil-gas layer to the maximum extent.
Description
Technical Field
The invention relates to a microemulsion for relieving water lock injury of a low-permeability reservoir, belonging to the field of low-permeability reservoir exploitation operation.
Background
Along with the large-scale development of petroleum, the water content of a medium-high permeability reservoir is gradually increased, the comprehensive water content of the domestic high permeability reservoir is more than 92%, and the petroleum development is mainly shifted to a low permeability reservoir. The capillary action of the reservoir is stronger due to the small pore throat diameter of the low-permeability reservoir, and the difference of magnitude exists compared with that of a medium-high permeability reservoir. Once external water enters an oil well under certain pressure in the process of mining operation to cause water lock pollution of a near-wellbore region, the recovery of natural energy is difficult to realize, the low yield and low liquid of the oil well are caused, and the economic development of the oil field is seriously influenced. The existing relieving system mainly aims at medium-high permeability reservoirs, and the relieving effect is not ideal for low permeability reservoirs, so that the development of a water-lock damage relieving system suitable for low permeability reservoirs is urgently needed.
Disclosure of Invention
In view of the prior art, the invention provides a microemulsion for relieving water lock damage of a low-permeability reservoir.
The invention is realized by the following technical scheme:
a microemulsion for relieving water lock injury of a hypotonic oil reservoir comprises the following components in percentage by weight: 10-20% of nonionic surfactant, 10-15% of anionic surfactant, 8-15% of stabilizer, 6-10% of auxiliary agent, 8% of diesel oil and 32-58% of water.
The nonionic surfactant is selected from one of nonylphenol polyoxyethylene ether, octylphenol polyoxyethylene ether, OP-10 (polyoxyethylene octylphenol ether-10) and APG1210 (alkyl glycoside).
The anionic surfactant is selected from any one of sodium dodecyl benzene sulfonate, sodium hexadecylbenzene sulfonate, sodium dodecyl sulfonate and sodium hexadecyl sulfonate.
The stabilizer is selected from any one of alkyl dimethyl betaine, alkyl dimethyl sulfoethyl betaine and alkyl dimethyl sulfopropyl betaine. The alkyl refers to alkyl with 12-18 carbon atoms.
The auxiliary agent is selected from any one of ethanol, ethylene glycol and isopropanol.
The diesel oil is light diesel oil with a boiling point of 180-370 ℃.
The water is clear water or treated sewage with the mineralization degree lower than 30000mg/L (the solid phase content is less than or equal to 1 mg/L).
The preparation method of the microemulsion for relieving the water lock injury of the hypotonic oil reservoir comprises the following steps: mixing the above materials, and mixing. Preferably, the preparation method is as follows: adding the auxiliary agent into water at 0-35 ℃, and uniformly mixing (uniformly stirring at a stirring speed of 20 r/min); then, adding the nonionic surfactant, and uniformly mixing (uniformly stirring, wherein the stirring speed is reduced at the moment, preferably 5 r/min); adding anionic surfactant, and mixing (stirring at 5 r/min); adding a stabilizer, and uniformly mixing (uniformly stirring at a stirring speed of 5 r/min); and finally adding diesel oil, and uniformly mixing (uniformly stirring at a stirring speed of 30r/min) to obtain the diesel oil.
The microemulsion for removing the water lock damage of the hypotonic oil reservoir can be applied as a preparation for removing the water lock damage of the hypotonic oil reservoir, and the specific application mode is that the leakage of operation liquid in the operation process is firstly counted, and the leakage plus 10 percent leakage (margin) is the dosage of the microemulsion.
The microemulsion for relieving water lock damage of the low-permeability reservoir has high oil-water mutual solubility, does not have oil-water two-phase interfacial tension, can effectively treat water invasion damage of a low-permeability reservoir near a well zone, and can recover the oil phase permeability to be more than or equal to 90 percent. Has high salinity tolerance of over 20000 mg/L. The microemulsion for removing the water lock damage of the low-permeability reservoir can remove the water invasion damage and dissolve colloid asphaltene separated out from a near-wellbore zone, and the dissolution rate is more than 20 mg/L. The microemulsion for relieving water lock damage of the low-permeability reservoir can effectively prevent and relieve water lock damage and protect an oil-gas layer to the maximum extent.
Detailed Description
The present invention will be further described with reference to the following examples.
The instruments, reagents, materials and the like used in the following examples are conventional instruments, reagents, materials and the like in the prior art and are commercially available in a normal manner unless otherwise specified. Unless otherwise specified, the experimental methods, detection methods, and the like described in the following examples are conventional experimental methods, detection methods, and the like in the prior art.
Example 1 preparation of microemulsion for water lock injury relief of hypotonic reservoir
The components and the dosage are as follows: 10g of nonionic surfactant nonylphenol polyoxyethylene ether, 10g of sodium dodecyl benzene sulfonate, 8g of alkyl dimethyl betaine (alkyl refers to alkyl with 12 carbon atoms), 6g of ethanol, 8g of light diesel oil and 58g of water.
The preparation method comprises the following steps: at normal temperature, adding the auxiliary agent into water, and uniformly stirring at the stirring speed of 20 r/min; then, adding a nonionic surfactant, and uniformly stirring at the stirring speed of 5 r/min; adding an anionic surfactant, and uniformly stirring at a stirring speed of 5 r/min; adding a stabilizer, and stirring uniformly at a stirring speed of 5 r/min; finally, adding diesel oil, stirring uniformly at a stirring speed of 30r/min to obtain a uniform transparent agent, and detecting the performance parameters as follows: at 20 ℃, the dissolving capacity to colloid is 21mg/L, the oil phase permeability recovery rate of the low-permeability reservoir after water invasion is more than or equal to 90 percent, and the mineralization resistance is 30100 mg/L.
Example 2 preparation of microemulsion for water lock injury relief of hypotonic reservoir
The components and the dosage are as follows: 15g of nonionic surfactant nonylphenol polyoxyethylene ether, 12g of sodium dodecyl benzene sulfonate, 10g of alkyl dimethyl betaine (alkyl refers to alkyl with 12 carbon atoms, namely, dodecyl dimethyl betaine), 8g of ethanol, 8g of light diesel oil and 47g of water.
The preparation method comprises the following steps: mixing and stirring at normal temperature to obtain a uniform transparent agent, namely microemulsion, and detecting the uniform transparent agent to obtain the following performance parameters: at 20 ℃, the dissolving capacity to colloid is 28mg/L, the oil phase permeability recovery rate of the low-permeability reservoir after water invasion is more than or equal to 92%, and the mineralization resistance is 25000 mg/L.
Example 3 preparation of microemulsion for water lock injury relief of hypotonic reservoir
The components and the dosage are as follows: 20g of nonionic surfactant nonylphenol polyoxyethylene ether, 15g of sodium dodecyl benzene sulfonate, 15g of alkyl dimethyl betaine (alkyl refers to alkyl with 12 carbon atoms), 10g of ethanol, 8g of light diesel oil and 32g of water.
The preparation method comprises the following steps: mixing and stirring at normal temperature to obtain a uniform transparent agent, namely microemulsion, and detecting the uniform transparent agent to obtain the following performance parameters: at 20 ℃, the dissolving capacity to colloid is 31mg/L, the oil phase permeability recovery rate to the low-permeability oil reservoir after water invasion is more than or equal to 95 percent, and the mineralization resistance is 20000 mg/L.
Example 4 preparation of microemulsion for water lock injury relief of hypotonic reservoir
The components and the dosage are as follows: 10g of octylphenol polyoxyethylene ether, 15g of sodium hexadecylbenzene sulfonate, 8g of alkyl dimethyl sulfopropyl betaine (alkyl refers to alkyl with 12 carbon atoms), 10g of ethylene glycol, 8g of light diesel oil and 49g of water.
The preparation method comprises the following steps: mixing and stirring at normal temperature to obtain uniform transparent agent, namely microemulsion.
Example 5 preparation of microemulsion for Water Lock injury relief for hypotonic reservoir
The components and the dosage are as follows: 20g of nonionic surfactant OP-10, 10g of sodium dodecyl sulfate, 15g of alkyl dimethyl sulfopropyl betaine (alkyl refers to alkyl with 16 carbon atoms), 6g of propanol, 8g of light diesel oil and 41g of water.
The preparation method comprises the following steps: mixing and stirring at normal temperature to obtain uniform transparent agent, namely microemulsion.
Example 6 preparation of microemulsion for Water Lock injury relief for hypotonic reservoir
The components and the dosage are as follows: 15g of nonionic surfactant APG1210, 15g of sodium hexadecylsulfonate, 12g of alkyl dimethyl sulfoethyl betaine (alkyl refers to alkyl with 18 carbon atoms), 6g of glycol, 8g of light diesel oil and 44g of water (the mineralization degree of the treated sewage is lower than 30000mg/L, and the solid phase content is less than or equal to 1 mg/L).
The preparation method comprises the following steps: mixing and stirring at normal temperature to obtain uniform transparent agent, namely microemulsion.
Example (c): the geologic interpretation of the wells has a reservoir permeability of 0.3-40 × 10-3μm2For low permeability oil well, the new production liquid amount is 8m3D, 100% water.
According to the well logging interpretation result, the reservoir layer of the well is the oil-water layer, and other oil wells in the zone have certain oil production, so that the damage of the well caused by pollution in the drilling process is analyzed. According to the well drilling report, the well loses 9m of drilling fluid in the well drilling process3. The well is constructed in 2016, 12 months and 7 days, and the dosage of the microemulsion is 9.9m according to the dosage of the microemulsion on site3The microemulsion (prepared in example 3) was extruded into the treatment interval in situ. Production liquid amount after well opening is 25m3About 15m of oil production3And d, the effect is obvious.
Although the specific embodiments of the present invention have been described with reference to the examples, the scope of the present invention is not limited thereto, and those skilled in the art will appreciate that various modifications and variations can be made without inventive effort by those skilled in the art based on the technical solution of the present invention.
Claims (5)
1. A microemulsion for relieving water lock injury of a hypotonic oil reservoir, which is characterized in that: the paint consists of the following components in percentage by weight: 10-20% of nonionic surfactant, 10-15% of anionic surfactant, 8-15% of stabilizer, 6-10% of auxiliary agent, 8% of diesel oil and 32-58% of water;
the nonionic surfactant is selected from nonylphenol polyoxyethylene ether;
the anionic surfactant is selected from sodium dodecyl benzene sulfonate;
the stabilizer is selected from alkyl dimethyl betaine; the alkyl refers to an alkyl group with 12-18 carbon atoms;
the auxiliary agent is selected from ethanol;
is prepared by the following preparation method:
at the temperature of 0-35 ℃, adding the auxiliary agent into water, and stirring uniformly at the stirring speed of 20 r/min; then adding the nonionic surfactant, and stirring uniformly at the stirring speed of 5 r/min; then adding an anionic surfactant, and uniformly stirring at the stirring speed of 5 r/min; then adding a stabilizer, and uniformly stirring at the stirring speed of 5 r/min; finally, adding diesel oil, and stirring uniformly at a stirring speed of 30r/min to obtain the diesel oil;
the diesel oil is light diesel oil with a boiling point of 180-370 ℃;
the water is clear water or treated sewage with the mineralization degree lower than 30000 mg/L.
2. The microemulsion for the release of water lock damage of hypotonic oil reservoirs according to claim 1, wherein: the composition consists of the following components: 10g of nonylphenol polyoxyethylene ether, 10g of sodium dodecyl benzene sulfonate, 8g of alkyl dimethyl betaine, 6g of ethanol, 8g of light diesel oil and 58g of water.
3. The microemulsion for the release of water lock damage of hypotonic oil reservoirs according to claim 1, wherein: the composition consists of the following components: 15g of nonylphenol polyoxyethylene ether, 12g of sodium dodecyl benzene sulfonate, 10g of alkyl dimethyl betaine, 8g of ethanol, 8g of light diesel oil and 47g of water.
4. The microemulsion for the release of water lock damage of hypotonic oil reservoirs according to claim 1, wherein: the composition consists of the following components: 20g of nonylphenol polyoxyethylene ether, 15g of sodium dodecyl benzene sulfonate, 15g of alkyl dimethyl betaine, 10g of ethanol, 8g of light diesel oil and 32g of water.
5. Use of the microemulsion of any one of claims 1-4 for hypotonic reservoir water lock damage relief for relieving hypotonic reservoir water lock damage.
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| CN110376113A (en) * | 2019-07-29 | 2019-10-25 | 中国地质大学（北京） | A kind of evaluation coal seam reservoirs water blocking damage method and water lock release liquid |
| CN113528099A (en) * | 2020-04-10 | 2021-10-22 | 中石化南京化工研究院有限公司 | Waterproof locking agent and preparation method thereof |
| CN113563861B (en) * | 2021-07-27 | 2022-12-23 | 中国石油大学(北京) | Microemulsion composition, nano emulsion, preparation method and application of nano emulsion, and fracturing fluid |
| CN114316935B (en) * | 2022-01-11 | 2023-03-21 | 盘锦鸿鼎油气技术服务有限公司 | Micro-emulsified acid blockage removing system and preparation method thereof |
| CN114891488B (en) * | 2022-05-27 | 2023-12-19 | 东营施普瑞石油工程技术有限公司 | Water lock injury treating agent and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006029019A3 (en) * | 2004-09-03 | 2006-06-29 | Baker Hughes Inc | Method of removing an invert emulsion filter cake after the drilling process using a single phase microemulsion |
| CN102575146A (en) * | 2009-07-27 | 2012-07-11 | 普拉德研究及开发股份有限公司 | Microemulsion to improve shale gas production by controlling water imbibition |
| CN104845605A (en) * | 2014-02-18 | 2015-08-19 | 中国石油化工股份有限公司 | Nanometer emulsion flooding increase agent for oilfield flooding, and preparation method thereof |
-
2017
- 2017-03-13 CN CN201710149122.0A patent/CN108570317B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006029019A3 (en) * | 2004-09-03 | 2006-06-29 | Baker Hughes Inc | Method of removing an invert emulsion filter cake after the drilling process using a single phase microemulsion |
| CN102575146A (en) * | 2009-07-27 | 2012-07-11 | 普拉德研究及开发股份有限公司 | Microemulsion to improve shale gas production by controlling water imbibition |
| CN104845605A (en) * | 2014-02-18 | 2015-08-19 | 中国石油化工股份有限公司 | Nanometer emulsion flooding increase agent for oilfield flooding, and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 非离子微乳液制备及其对钻井液堵塞的解除作用;蓝强;《钻井液与完井液》;20160531;第33卷(第03期);第141页摘要，右栏第1段，第1.2.1节，第2.2.2节，第2.3节 * |
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