CN102796508A - Anionic surfactant crosslinked acid - Google Patents
Anionic surfactant crosslinked acid Download PDFInfo
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- CN102796508A CN102796508A CN201110137479XA CN201110137479A CN102796508A CN 102796508 A CN102796508 A CN 102796508A CN 201110137479X A CN201110137479X A CN 201110137479XA CN 201110137479 A CN201110137479 A CN 201110137479A CN 102796508 A CN102796508 A CN 102796508A
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- gel breaker
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- calcium oxide
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Abstract
The invention relates to an anionic surfactant crosslinked acid, which consists of 1.5 to 2 parts of dodecylbenzene sulfonic acid, 1 to 2 parts of lauryl sodium sulfate, 8 to 10 parts of solid sodium chloride, 3 to 4 parts of isooctane, 1 to 2 parts of gel breaker, and 80 to 85 parts of 1 to 12 percent hydrochloric acid or organic acid, wherein the organic acid consists of 1 percent of hydrochloric acid, 3 percent formic acid and 6 percent acetic acid; and the gel breaker is prepared by the following steps: metering 50mL of cyclohexanol, weighing 20g of anhydrous calcium oxide, stirring until the anhydrous calcium oxide is completely dissolved, adding 10g of magnesium oxide, uniformly mixing, airing indoors for 2 to 3 days, crushing, and sieving by using a 100-mesh sieve. When the crosslinked acid is continuously sheared for 90 minutes at a rate of 170s<-1>, the viscosity is kept at about 50mPa.s, and sand can be carried; and the gel breaker breaks gel radically, and has the viscosity of less than 5.0mPa.s.
Description
Technical field:
The present invention relates to a kind of sandfrac of ultralow oil impregnate gas-bearing formation oil well cross-linked acid, employed AS cross-linked acid in the augmented injection of oil and water well deep acidizing of being fit to.
Background technology:
At present, ultralow oil impregnate gas-bearing formation reservoir properties is poor, and rate of permeation is low, and pore throat is trickle, and the face rate is low, and per-well production is low, but acid soluble mineral content is generally higher.Cross-linked acid is taken sand and is had yield potential preferably; In reservoir, form in the supporting crack; The acid soluble mineral of acid in the system in can the corrosion reservoir further improves reservoir matrix perviousness and further improves per-well production; But present cross-linked acid performance is not too perfect: the system that has can realize the crosslinked sand of taking under higher concentration acid (acid concentration is greater than 10%) condition, is high molecular polymer but host adopts, and linking agent adopts the metal species linking agent; The broken glue difficulty of system, the row's of returning difficulty and injury are bigger in the ultra-low penetration reservoir of the little larynx of pore; What the system host that has adopted is tensio-active agent, and the row of returning is thorough, injure little, still can not thickening in sour environment, perhaps can only take sand in lower concentration acid environment (concentration of hydrochloric acid is less than 3%) realization thickening, prop-carrying capacity is poor.
Summary of the invention:
The object of the present invention is to provide a kind of sandfrac of ultralow oil impregnate gas-bearing formation oil well cross-linked acid, employed AS cross-linked acid in the augmented injection of oil and water well deep acidizing of being fit to.
A kind of AS cross-linked acid of the present invention is the mixture of following composition and weight part:
Be weight percent concentration.
Described AS cross-linked acid; Measure the appearance that the hydrochloric acid soln injection that takes by weighing weight percent concentration 1-12% has whisking appliance earlier by forming, turn on agitator is metered into acid thickening material A, acid thickening material B again; Add solubility promoter and gel breaker again, stir.
According to dosage add the solid linking agent, stir until forming frozen glue.
Described acid thickening material A is a Witco 1298 Soft Acid, and described acid thickening material B is a sodium lauryl sulphate, and described solubility promoter is short chain alkanes such as octane-iso, and described solid linking agent is a solid sodium chloride.
Described gel breaker host material is a hexalin.
Described solid gel breaker preparation method is an absorption method: metering earlier takes by weighing the metal vessel that the 50mL hexalin places the band whipping appts; Take by weighing the 20g anhydrous calcium oxide again; Be stirred to anhydrous calcium oxide and all dissolve, add 10g Natural manganese dioxide again, mixing; Indoor airing 2-3 days, fragmentation, mistake 100 mesh sieves, packing got final product.
The host of AS cross-linked acid of the present invention is Witco 1298 Soft Acid and two kinds of ASs of sodium lauryl sulphate; Short chain alkanes such as octane-iso are solubility promoter; Linking agent is a sodium-chlor, and mixing by a certain percentage can realization thickening in the hydrochloric acid of 1%-12% or organic acid (1% hydrochloric acid+3% formic acid+6% acetate), shears 90min continuously at 170s-1; Viscosity about 50mPa.s, can realize taking sand continually and steadily.Gel breaker is a hexalin, and broken glue is thorough, and viscosity is less than 5.0mPa.s.
The present invention is in the technical innovation of having carried out aspect two of fracturing liquid.
1, novel thickening material
Thickening material is two kinds of ASs, and this thickening material is little in the sandstone surface adsorptive capacity.
2, novel cross-linked acid
Through use two kinds of ASs realized concentration of hydrochloric acid greater than under 10% condition with the organic acid condition under the thickening of (1% hydrochloric acid+3% formic acid+6% acetate) take sand.
Embodiment:
Embodiment 1:
The hydrochloric acid soln that takes by weighing 81.2g10% injects the container that has whisking appliance, and turn on agitator is metered into the 1.8g Witco 1298 Soft Acid again, adds the 1.5g sodium lauryl sulphate again, adds the 4g octane-iso then, continues to be stirred to whole dissolvings.Add 10g sodium-chlor and 1.5g solid gel breaker, be stirred to frozen glue and form.
Embodiment 2:
The organic acid soln (1% hydrochloric acid+3% formic acid+6% acetate) that takes by weighing 81.2g10% injects the container that has whisking appliance; Turn on agitator is metered into the 1.5g Witco 1298 Soft Acid again, adds the 1.8g sodium lauryl sulphate again; Add the 4g octane-iso then, continue to be stirred to whole dissolvings.Add 10g sodium-chlor and 1.5g solid gel breaker, be stirred to frozen glue and form.
Embodiment 3:
The hydrochloric acid soln that takes by weighing 80g10% injects the container that has whisking appliance, and turn on agitator is metered into the 1.5g Witco 1298 Soft Acid again, adds the 1g sodium lauryl sulphate again, adds the 3g octane-iso then, continues to be stirred to whole dissolvings.Add 8g sodium-chlor and 1g gel breaker, be stirred to frozen glue and form.
Embodiment 4:
The hydrochloric acid soln that takes by weighing 85g10% injects the container that has whisking appliance, and turn on agitator is metered into the 2g Witco 1298 Soft Acid again, adds the 1.52g sodium lauryl sulphate again, adds the 3.5g octane-iso then, continues to be stirred to whole dissolvings.Add 9g sodium-chlor and 2g solid gel breaker, be stirred to frozen glue and form.
Claims (1)
1. AS cross-linked acid is characterized in that: the mixture that is following composition and weight part:
Described acid thickening material A is a Witco 1298 Soft Acid;
Described acid thickening material B is a sodium lauryl sulphate;
Described solubility promoter is an octane-iso;
Described solid linking agent is a solid sodium chloride;
Described organic acid is 1% hydrochloric acid+3% formic acid+6% acetate;
According to dosage add the solid linking agent, stir until forming frozen glue;
Described gel breaker is prepared by following method: metering earlier takes by weighing the metal vessel that the 50mL hexalin places the band whipping appts; Take by weighing the 20g anhydrous calcium oxide again; Be stirred to anhydrous calcium oxide and all dissolve, add 10g Natural manganese dioxide again, mixing; Indoor airing 2-3 days, fragmentation, mistake 100 mesh sieves, packing got final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110137479.XA CN102796508B (en) | 2011-05-25 | 2011-05-25 | Anionic surfactant crosslinked acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110137479.XA CN102796508B (en) | 2011-05-25 | 2011-05-25 | Anionic surfactant crosslinked acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102796508A true CN102796508A (en) | 2012-11-28 |
| CN102796508B CN102796508B (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110137479.XA Active CN102796508B (en) | 2011-05-25 | 2011-05-25 | Anionic surfactant crosslinked acid |
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| CN (1) | CN102796508B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107828404A (en) * | 2017-11-20 | 2018-03-23 | 中国石油天然气股份有限公司 | A kind of fracturing fluid for matching somebody with somebody liquid for oil field high salinity recovered water |
| CN108822826A (en) * | 2018-07-16 | 2018-11-16 | 中国石油大学(华东) | A kind of low corrosion green crosslinked acid fracturing fluid and the preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4561502A (en) * | 1982-01-07 | 1985-12-31 | Marathon Oil Company | Oil recovery process using a polyacrylamide gel |
| NO315661B1 (en) * | 1993-04-21 | 2003-10-06 | Shell Int Research | Removal of fine particles from a used aqueous well treatment fluid |
| US20080220992A9 (en) * | 2004-05-20 | 2008-09-11 | Halliburton Energy Services, Inc. | Methods and compositions of controlling the rheology of a diutan-containing well treatment fluid at high temperatures |
-
2011
- 2011-05-25 CN CN201110137479.XA patent/CN102796508B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4561502A (en) * | 1982-01-07 | 1985-12-31 | Marathon Oil Company | Oil recovery process using a polyacrylamide gel |
| NO315661B1 (en) * | 1993-04-21 | 2003-10-06 | Shell Int Research | Removal of fine particles from a used aqueous well treatment fluid |
| US20080220992A9 (en) * | 2004-05-20 | 2008-09-11 | Halliburton Energy Services, Inc. | Methods and compositions of controlling the rheology of a diutan-containing well treatment fluid at high temperatures |
Non-Patent Citations (4)
| Title |
|---|
| 吴月先等: "地面交联酸携砂压裂工艺技术开发及其发展方向", 《石油科技论坛》 * |
| 李干佐等: "温度与盐度对AS胶束体系增溶能力的影响", 《油田化学》 * |
| 王晨等: "十二烷基苯磺酸钠胶束在含Ni2+水溶液中的超滤特性研究", 《精细石油化工》 * |
| 蒋建方等: "交联酸酸化技术发展综述", 《油气井测试》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107828404A (en) * | 2017-11-20 | 2018-03-23 | 中国石油天然气股份有限公司 | A kind of fracturing fluid for matching somebody with somebody liquid for oil field high salinity recovered water |
| CN108822826A (en) * | 2018-07-16 | 2018-11-16 | 中国石油大学(华东) | A kind of low corrosion green crosslinked acid fracturing fluid and the preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102796508B (en) | 2014-10-15 |
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