WO2015120751A1 - 页岩油气井压裂用试剂及其产品 - Google Patents

页岩油气井压裂用试剂及其产品 Download PDF

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WO2015120751A1
WO2015120751A1 PCT/CN2014/095329 CN2014095329W WO2015120751A1 WO 2015120751 A1 WO2015120751 A1 WO 2015120751A1 CN 2014095329 W CN2014095329 W CN 2014095329W WO 2015120751 A1 WO2015120751 A1 WO 2015120751A1
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mass ratio
agent
prepared
surfactant
high efficiency
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杜林麟
陈守雨
马利宝
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东方宝麟科技发展(北京)有限公司
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    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60Compositions for stimulating production by acting on the underground formation
    • C09K8/62Compositions for forming crevices or fractures
    • C09K8/66Compositions based on water or polar solvents
    • C09K8/68Compositions based on water or polar solvents containing organic compounds
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    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60Compositions for stimulating production by acting on the underground formation
    • C09K8/602Compositions for stimulating production by acting on the underground formation containing surfactants
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    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60Compositions for stimulating production by acting on the underground formation
    • C09K8/84Compositions based on water or polar solvents
    • C09K8/86Compositions based on water or polar solvents containing organic compounds
    • C09K8/88Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60Compositions for stimulating production by acting on the underground formation
    • C09K8/84Compositions based on water or polar solvents
    • C09K8/86Compositions based on water or polar solvents containing organic compounds
    • C09K8/88Compositions based on water or polar solvents containing organic compounds macromolecular compounds
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    • C09K2208/00Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/12Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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    • C09K2208/26Gel breakers other than bacteria or enzymes
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    • C09K2208/00Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/28Friction or drag reducing additives
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    • C09K2208/00Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/30Viscoelastic surfactants [VES]

Definitions

  • the invention relates to the field of oil and gas well exploitation, in particular to a shale oil and gas well fracturing reagent and a product thereof.
  • Shale gas is an unconventional oil and gas reservoir.
  • China's shale gas resources are very rich, especially in the Sichuan Basin, and its exploration potential is huge.
  • the two sets of shale of the Cambrian and Silurian systems evaluated in the Sichuan Basin the shale gas resources are equivalent to 1.5 to 2.5 times of the conventional natural gas resources in the Sichuan Basin; two sets of the shale and the Longmaxi Formation shale in Sichuan
  • the shale gas resources in the stratum will reach 6.8 ⁇ 8.4 ⁇ 10 12 m 3 .
  • Shale has ultra-low permeability, reservoir fragility is also different, and multi-layer shale reservoir characteristics and flow mechanism are also very different.
  • low permeability, brittleness and heterogeneity between different layers of shale it is necessary to establish a suitable large-area, high-yield fracture filling network in shale reservoirs to maximize natural gas migration.
  • the shale's own characteristics determine its water sensitivity, requiring the fracturing fluid system to have good anti-swelling properties.
  • shale gas reservoir fracturing requires manual creation of a large enough fracture volume to improve formation connectivity and increase single well venting volume, both in liquid scale and sanding.
  • the quantity, or the construction parameters (construction displacement, pressure, etc.) far exceeds the conventional oil and gas fracturing design. Therefore, the shale gas pressure crack is the final transformation purpose to form the formation network crack: network fracturing.
  • the basic idea of network fracturing is: by injecting a large amount of high fluid loss, high elasticity, low viscosity liquid, this special liquid is used to explore micro cracks, rather than being used to expand and like liquids with higher viscosity. Widening the main crack and using a small amount of sand as the medium for the embankment sand, resulting in a higher pressure difference on the exposed crack surface, so that the fracturing fluid and sand enter the cracks that are subsequently opened until the bottom hole pressure changes The crack has been over-expanded.
  • An object of the present invention is to provide a reagent for fracturing oil and gas wells in shale
  • Another object of the present invention is to provide a slick water for shale gas well fracturing
  • the present invention provides a shale oil and gas well fracturing agent, the reagent comprising a defoaming agent and a high efficiency drainage agent in a weight ratio of 1:15;
  • the antifoaming agent is a mixture of a silicone oil and an emulsifier in a weight ratio of 3:2;
  • the high-efficiency drainage aid is a fluorocarbon surfactant.
  • the silicone oil is a conventional commercially available reagent in the art, and any commercially available silicone oil meeting the relevant quality standards can be used in the present invention, for example, the model 9706 produced by Sloco Chemical Co., Ltd. Emulsified silicone oil;
  • the emulsifier is a conventional commercially available reagent in the art, and any commercially available emulsifier meeting the relevant quality standards can be used in the present invention, such as a nonionic emulsifier, preferably a symplectic agent.
  • a nonionic emulsifier preferably a symplectic agent.
  • the p-octylphenol polyoxyethylene ether described therein is a conventional commercially available reagent in the art, and any commercially available p-octylphenol polyoxyethylene ether meeting the relevant quality standards can be used in the present invention, such as a model manufactured by Chemical Book. For ADS, p-octylphenol polyoxyethylene ether.
  • the agent according to the present invention wherein the fluorocarbon surfactant is polytetrafluoroethylene.
  • the present invention provides a shale water for shale gas well fracturing comprising the reagent of the present invention, the slick water being prepared from the following weight percentage components: 0.2% high efficiency drag reducing agent, 0.5% composite Anti-swelling agent, 0.02% antifoaming agent, 0.3% high efficiency drainage aid, the balance is clear water;
  • the high efficiency drag reducing agent is a viscoelastic surfactant, polyacrylamide, AMPS (2-acrylamide-2-methylpropanesulfonic acid), N-isopropyl group in a weight ratio of 2:2:1:2:2.
  • AMPS 2-acrylamide-2-methylpropanesulfonic acid
  • N-isopropyl group in a weight ratio of 2:2:1:2:2.
  • viscoelastic surfactant is a zwitterionic viscoelastic surfactant
  • the zwitterionic viscoelastic surfactant is a conventional commercially available reagent in the art, such as a zwitterionic viscoelastic surfactant of the type YM-6 produced by Yimin Chemical;
  • the polyacrylamide is a conventional commercially available reagent in the art, and any commercially available polyacrylamide conforming to relevant quality standards can be used in the present invention, for example, a polyacrylamide of the type JHJ15 produced by Jihua Jusheng;
  • AMPS N-isopropylacrylamide and pimeloyl are all commercially available reagents in the art, and any of the above commercially available reagents meeting the relevant quality standards can be used in the present invention.
  • the composite anti-swelling agent is prepared by mixing 2-chloroethyltrimethylammonium chloride anti-swelling agent, cationic polyquaternary ammonium salt and polyquaternary phosphate with a mass ratio of 2:3:1;
  • the high-efficiency drainage aid is a fluorocarbon surfactant.
  • anti-swelling agent described therein is a conventional commercially available reagent in the art, and any commercially available anti-swelling agent conforming to relevant quality standards can be used in the present invention, for example, 2-chloroethyltrimethyl of model C113520 produced by Aladdin. Ammonium chloride anti-swelling agent;
  • the cationic polyquaternium salt described therein is a conventional commercially available reagent in the art, and any commercially available cationic polyquaternium salt meeting the relevant quality standards can be used in the present invention, for example, commercially available chloroacetic acid glycol double a cationic polyquaternium salt synthesized by using an ester, a trimethylolpropane trichloroacetate triester, a pentaerythritol chloroacetate and a long-chain tertiary amine as a raw material, and isopropanol as a solvent;
  • the polyquaternary phosphate is a conventional commercially available reagent in the art, and any commercially available polyquaternary phosphate which meets relevant quality standards can be used in the present invention, for example, a polyquaternary phosphate of the type 35429-15 produced by Jiangsu Feixiang. .
  • the present invention also provides a linear gel for a shale gas well network comprising the reagent of the present invention, the linear glue being prepared from the following weight percent components: 0.3% low molecular thickener, 0.2% flow Additive additive, 0.3% high efficiency drainage aid, 0.02% antifoaming agent, 0.05% viscosity modifier, the balance is clear water;
  • the low molecular thickener is a viscoelastic surfactant, polyacrylamide, AMPS, methacryloxytrimethylammonium chloride, in a weight ratio of 1:2:1:2:2:1:1 N-isopropylacrylamide, pimeloyl, and a mixture of base and base.
  • a linear gel for use in a shale gas well network according to the present invention wherein the viscoelastic surfactant is a conventional commercially available reagent in the art, and any commercially available viscoelastic surfactant meeting the relevant quality standards can be used in the present invention. , for example, a zwitterionic viscoelastic surfactant;
  • the zwitterionic viscoelastic surfactant is a conventional commercially available reagent in the art, such as a zwitterionic viscoelastic surfactant of the type YM-6 produced by Yimin Chemical;
  • the polyacrylamide is a conventional commercially available reagent in the art, and any commercially available polyacrylamide conforming to relevant quality standards can be used in the present invention, for example, a polyacrylamide of the type JHJ15 produced by Jihua Jusheng;
  • AMPS methacryloxytrimethylammonium chloride, N-isopropylacrylamide, flavonoids and pimelic acid are all commercially available reagents in the art, and any commercially available reagents meeting the relevant quality standards are available. Yu Benfa Bright.
  • the rheological assistant is prepared by mixing a viscoelastic surfactant having a mass ratio of 1:3 and ethanol;
  • the viscosity modifier is prepared by mixing potassium persulfate, ammonium persulfate and citric acid in a mass ratio of 2:3:1.
  • the present invention provides a shale oil network fracturing slick water containing the reagent of the present invention, which is prepared from the following weight percentage components: 0.2% high efficiency drag reducing agent, 0.5% composite anti-defense agent Stabilizer, 0.02% antifoaming agent, 0.3% high efficiency drainage aid, 0.15% rock wetting improver, balance is clear water;
  • the high efficiency drag reducing agent is a mixture of a viscoelastic surfactant, polyacrylamide, AMPS, N-isopropylacrylamide and pimelic acid in a weight ratio of 2:2:1:2:2.
  • the shale oil well network slick water for fracturing according to the present invention wherein the viscoelastic surfactant is a zwitterionic viscoelastic surfactant;
  • the zwitterionic viscoelastic surfactant is a conventional commercially available reagent in the art, such as a zwitterionic viscoelastic surfactant of the type YM-6 produced by Yimin Chemical;
  • the polyacrylamide is a conventional commercially available reagent in the art, and any commercially available polyacrylamide conforming to relevant quality standards can be used in the present invention, for example, a polyacrylamide of the type JHJ15 produced by Jihua Jusheng;
  • AMPS N-isopropylacrylamide and pimeloyl are all commercially available reagents in the art, and any of the above commercially available reagents meeting the relevant quality standards can be used in the present invention.
  • the composite anti-swelling agent is prepared by mixing an anti-swelling agent, a cationic polyquaternium salt and a polyquaternary phosphate with a mass ratio of 2:3:1;
  • anti-swelling agent described therein is a conventional commercially available reagent in the art, and any commercially available anti-swelling agent conforming to relevant quality standards can be used in the present invention, for example, 2-chloroethyltrimethyl of model C113520 produced by Aladdin. Ammonium chloride anti-swelling agent;
  • the cationic polyquaternium salt described therein is a conventional commercially available reagent in the art, and any commercially available cationic polyquaternium salt meeting the relevant quality standards can be used in the present invention, for example, it can be ethylene glycol bischloroacetate, chlorine. a trimethylolpropane acetate triester, a pentaerythritol chloroacetate tetraester and a long chain tertiary amine as a raw material, isopropanol as a solvent, a synthetic cationic polyquaternium;
  • the polyquaternary phosphate is a conventional commercially available reagent in the art, and any commercially available polyquaternary phosphate which meets relevant quality standards can be used in the present invention, for example, a polyquaternary phosphate of the type 35429-15 produced by Jiangsu Feixiang. .
  • rock wetting improver is a nonionic surfactant
  • nonionic surfactants described therein are conventional commercially available reagents in the art, and any commercially available nonionic surfactants meeting the relevant quality standards can be used in the present invention, such as ethylene glycol oxirane.
  • the present invention provides a shale oil well network fracturing linear glue comprising the reagent of the present invention, the linear glue being prepared from the following weight percentage components: 0.3% low molecular thickener, 0.2% flow Variable additive, 0.3% high efficiency drainage aid, 0.15% rock wetting improver, 0.02% antifoaming agent, 0.05% viscosity modifier, balance is clear water;
  • the low molecular thickener is a viscoelastic surfactant, polyacrylamide, AMPS, methacryloxytrimethylammonium chloride, in a weight ratio of 1:2:1:2:2:1:1 a mixture of N-isopropylacrylamide, pimeloyl, and alkaloid;
  • the shale oil well network linear gel for fracturing according to the present invention wherein the viscoelastic surfactant is a conventional commercially available reagent in the art, and any commercially available viscoelastic surfactant meeting the relevant quality standards can be used.
  • the invention is, for example, a zwitterionic viscoelastic surfactant;
  • the zwitterionic viscoelastic surfactant is a conventional commercially available reagent in the art, such as a zwitterionic viscoelastic surfactant of the type YM-6 produced by Yimin Chemical;
  • the polyacrylamide is a conventional commercially available reagent in the art, and any commercially available polyacrylamide conforming to relevant quality standards can be used in the present invention, for example, a polyacrylamide of the type JHJ15 produced by Jihua Jusheng;
  • AMPS methacryloxytrimethylammonium chloride, N-isopropylacrylamide, flavonoids and pimelic acid are all commercially available reagents in the art, and any commercially available reagents meeting the relevant quality standards are available. In the present invention.
  • the rheology aid is a mixture of a viscoelastic surfactant and ethanol in a weight ratio of 1:3.
  • rock wetting improver is a nonionic surfactant
  • nonionic surfactants described therein are conventional commercially available reagents in the art, and any commercially available nonionic surfactants meeting the relevant quality standards can be used in the present invention, such as ethylene glycol oxirane.
  • the viscosity modifier is prepared by mixing potassium persulfate, ammonium persulfate and citric acid in a mass ratio of 2:3:1.
  • the present invention provides a linear glue and slick water for shale oil and gas well fracturing.
  • the linear glue and the slick water of the invention have low friction, low expansion, low damage, easy returning, stable performance and fast swelling speed It has the characteristics of similar cleaning fracturing fluid, good performance, easy on-line preparation, strong adaptability, and can meet the needs of fracturing of different shale oil and gas wells.
  • Figure 1 and Figure 2 show the test results of the 1000m friction performance of the high-efficiency drag reducer indoor and 50mm coiled tubing
  • Figure 3 is a diagram showing the relationship between the high-efficiency drainage agent and the contact angle and surface tension
  • Figure 4 is a diagram showing the relationship between the high-efficiency drainage aid and the reflux rate
  • Figure 5 is a graph showing the anti-swelling performance of the anti-swelling agent
  • Figure 6 is a graph showing the viscosity increasing performance of a low molecular thickener
  • Figure 7 is a graph showing the relationship between surface tension and concentration of a low molecular thickener
  • Figure 8 is a graph showing the measured frictional resistance of a 51/2" casing slippery water
  • Figure 9 is a graph showing the measured frictional resistance of a 51/2" casing fractured well slippery water
  • Figure 10 is a graph showing the friction performance of the SRFR slick 41/2" tubing
  • Figure 11 is a chart of slippery water return rate
  • Figure 12 is a chart of slick water anti-expansion rate
  • Figure 13 is a graph showing the measurement of the resistance reduction rate of the SRFR linear glue at a shear rate of 200 to 1000 s -1 ;
  • Figure 14 is a diagram of the linear water return rate of the on-site water
  • Figure 15 is a plot of the anti-expansion rate of the linear water gel on site
  • Figure 16 and Figure 17 are the application diagrams of the SRFR slick water field application
  • Figure 18 shows the Why fracturing construction curve.
  • a shale oil and gas well fracturing reagent prepared by mixing an antifoaming agent and a polytetrafluoroethylene in a weight ratio of 1:15; wherein the antifoaming agent is made up of a silicone oil and a symplectic weight ratio of 3:2 by weight A mixture of phenolic polyoxyethylene ether.
  • silicone oil is a type 9706 emulsified silicone oil produced by Sloco Chemical Co.
  • p-octylphenol polyoxyethylene ether is a model ADS-based p-octylphenol polyoxyethylene ether produced by Chemical Book;
  • the polytetrafluoroethylene is a type of polytetrafluoroethylene produced by Juhua Chemical Co., Ltd. of JHHG12.
  • a shale water fracturing slick water prepared by mixing the following weight percentage components: 0.2% high efficiency drag reducing agent, 0.5% composite anti-swelling agent, 0.02% antifoaming agent, 0.3% efficient assisting row The amount of the agent is clear water;
  • the high-efficiency drag reducer is a zwitterionic viscoelastic surfactant, polyacrylamide, AMPS (2-acrylamide-2-methylpropanesulfonic acid), N- in a weight ratio of 2:2:1:2:2.
  • AMPS 2-acrylamide-2-methylpropanesulfonic acid
  • N- in a weight ratio of 2:2:1:2:2.
  • the zwitterionic viscoelastic surfactant is a zwitterionic viscoelastic surfactant of the type YM-6 produced by Yimin Chemical;
  • the polyacrylamide is a polyacrylamide of the type JHJ15 produced by Jihua Jusheng;
  • the composite anti-swelling agent is prepared by mixing an anti-swelling agent, a cationic polyquaternium salt and a polyquaternary phosphate with a mass ratio of 2:3:1;
  • the anti-swelling agent described therein is a 2-chloroethyltrimethylammonium chloride anti-swelling agent of the type C113520 produced by Aladdin;
  • the cationic polyquaternium salt is prepared by using ethylene glycol diester of chloroacetic acid, trimethylolpropane trichloroacetate, chloroacetic acid pentaerythritol tetraester and tertiary amine in a mass ratio of 2:1:3:2. , isopropanol (with a mass ratio of raw materials of 2:4) as a solvent, reacting at 150 ° C for 3 hours to prepare a cationic polyquaternium;
  • the polyquaternary phosphate is a polyquaternary phosphate of the type 35429-15 produced by Jiangsu Feixiang.
  • the antifoaming agent and high-efficiency drainage aid were prepared as in Preparation Example 1.
  • a shale gas well network uses a linear glue prepared from the following weight percentage components: 0.3% low molecular thickener, 0.2% rheological additive, 0.3% high efficiency drainage agent, 0.02% antifoaming agent , 0.05% viscosity modifier, the balance is clear water;
  • the low molecular thickener comprises a zwitterionic viscoelastic surfactant, polyacrylamide, AMPS, methacryloxytrimethyl chloride in a weight ratio of 1:2:1:2:2:1:1 A mixture of ammonium, N-isopropylacrylamide, pimeloyl, and alkaloids.
  • the zwitterionic viscoelastic surfactant is a zwitterionic viscoelastic surfactant of the type YM-6 produced by Yimin Chemical;
  • the polyacrylamide is a polyacrylamide of the type JHJ15 produced by Jihua Jusheng;
  • the rheological assistant is prepared by mixing a zwitterionic viscoelastic surfactant having a mass ratio of 1:3 and ethanol;
  • the viscosity modifier is prepared by mixing potassium persulfate, ammonium persulfate and citric acid in a mass ratio of 2:3:1.
  • the antifoaming agent and high-efficiency drainage aid were prepared as in Preparation Example 1.
  • the present invention provides a shale oil network fracturing slick water containing the reagent of the present invention, which is prepared from the following weight percentage components: 0.2% high efficiency drag reducing agent, 0.5% composite anti-defense agent Stabilizer, 0.02% antifoaming agent, 0.3% high efficiency drainage aid, 0.15% rock wetting improver, balance is clear water;
  • the high-efficiency drag reducer is prepared by mixing a zwitterionic viscoelastic surfactant, polyacrylamide, AMPS, N-isopropylacrylamide and pimelic acid in a weight ratio of 2:2:1:2:2.
  • the zwitterionic viscoelastic surfactant is a zwitterionic viscoelastic surfactant of the type YM-6 produced by Yimin Chemical;
  • the polyacrylamide is a polyacrylamide of the type JHJ15 produced by Jihua Jusheng;
  • the composite anti-swelling agent is prepared by mixing an anti-swelling agent, a cationic polyquaternium salt and a polyquaternary phosphate with a mass ratio of 2:3:1;
  • the anti-swelling agent described therein is an anti-swelling agent of 2-chloroethyltrimethylammonium chloride of model C113520 produced by Aladdin;
  • the cationic polyquaternium salt is prepared by using ethylene glycol diester of chloroacetic acid, trimethylolpropane trichloroacetate, chloroacetic acid pentaerythritol tetraester and tertiary amine in a mass ratio of 2:1:3:2. , isopropanol (with a mass ratio of raw materials of 2:4) as a solvent, reacting at 150 ° C for 3 hours to prepare a cationic polyquaternium;
  • the polyquaternary phosphate is a polyquaternary phosphate of the type 35429-15 produced by Jiangsu Feixiang.
  • the rock wetting improver is ethylene glycol ethylene oxide.
  • the antifoaming agent and high-efficiency drainage aid were prepared as in Preparation Example 1.
  • the present invention provides a shale oil well network fracturing linear glue comprising the reagent of the present invention, the linear glue being prepared from the following weight percentage components: 0.3% low molecular thickener, 0.2% flow Variable additive, 0.3% high efficiency drainage aid, 0.15% rock wetting improver, 0.02% antifoaming agent, 0.05% viscosity modifier, balance is clear water;
  • the low molecular thickener comprises a zwitterionic viscoelastic surfactant, polyacrylamide, AMPS, methacryloxytrimethyl chloride in a weight ratio of 1:2:1:2:2:1:1 a mixture of ammonium, N-isopropylacrylamide, pimeloyl, and alkaloid;
  • the zwitterionic viscoelastic surfactant is a zwitterionic viscoelastic surfactant of the type YM-6 produced by Yimin Chemical;
  • the polyacrylamide is a polyacrylamide of the type JHJ15 produced by Jihua Jusheng;
  • the rheology aid is a mixture of a zwitterionic viscoelastic surfactant and ethanol in a weight ratio of 1:3.
  • rock wetting improver is ethylene glycol ethylene oxide
  • the viscosity modifier is prepared by mixing potassium persulfate, ammonium persulfate and citric acid in a mass ratio of 2:3:1.
  • the antifoaming agent and high-efficiency drainage aid were prepared as in Preparation Example 1.
  • SRFR slick water and linear glue have the ability to continuously mix and match, which can meet the construction displacement requirements of 10-15m 3 /min.
  • a continuous mixing car mixing tank is added to prepare a liquid supply sand mixer.
  • Slip water additive addition sequence high efficiency drag reducer - composite anti-swelling agent - defoamer - high efficiency drainage agent / rock wetting improver - high efficiency drag reducer - composite anti-swelling agent - defoamer - high efficiency drainage agent.
  • Linear glue additive addition sequence low molecular thickener - rheological additive - high efficiency drainage agent - defoamer - viscosity modifier / rock wetting improver - low molecular thickener - rheological additive - efficient row Agent - defoamer - viscosity modifier.
  • a large displacement jet circulation preparation method can be adopted, which can also meet the construction displacement requirement of 10-14 m 3 /min for the sand mixing vehicle.
  • the order of additive addition is the same as for continuous compounding.
  • SRFR slick water has been successfully applied in wells such as Dongfeng 2, Yuan HF-1, Jiaozuo 1HF, Peng Page 3HF, and Chang 3-2HF.
  • the maximum well depth is 4985m
  • the maximum closing pressure is 93MPa
  • the highest shale content is 98%.
  • the maximum single-stage sanding is 126m 3
  • the maximum liquid volume of a single well is 46,000 square meters
  • the highest displacement is 15.5m 3 /min
  • the highest number is 22 sections, which fully meets the large-scale fracturing demand of horizontal wells. As shown in Figures 16 and 17.
  • the HF-1 well slippery water system has good resistance reduction performance.
  • the displacement of the fifth stage fracturing construction is 12.1-14.1m 3 /min, the pump pressure is 80.2-90.0MPa, and the liquid pressure reduction rate is 70-75%.
  • the actual sand-carrying capacity of the slick water of the 1FF well is good, and the sand ratio is 18%.
  • SRFR linear glue has been successfully used in wells such as Yuan HF-1, Jiao 1HF, Peng Page 3HF, and Chang 3-2HF, with a maximum sand ratio of 32%.
  • the application of the focal point 1HF well shows that the linear adhesive exhibits obvious viscoelastic characteristics, and the highest sand ratio is 32%.
  • the low molecular thickener of the present invention has high viscosity-increasing ability, and the concentration of the thickener is almost linear with the viscosity of the base liquid.
  • Fig. 7 The surface tension properties of the low molecular thickener of the present invention are shown in Fig. 7.
  • the resistance reduction rate of the 51/2" casing is 70%
  • the slick water prepared with on-site mountain spring water, creek water and tap water has a good drainage effect to meet the site construction requirements.
  • the slick water prepared on site has a good anti-swelling effect.
  • the linear resist of the present invention has a resistance reduction rate of 20% to 25% of the water friction at a shear rate of 200 to 1000 s -1 by comparison with a water friction pattern.
  • the linear glue prepared with on-site mountain spring water, creek water and tap water has a good drainage function to meet the site construction requirements.
  • the linear gel formulated on site has a good anti-swelling effect.
  • Table 3 the slick water and linear grit sand rate determination table of the present invention
  • the stability of the slippery water and the linear glue of the invention can be determined:

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Abstract

本发明提供了一种页岩油气井压裂用试剂及其产品。所述试剂包含质量比为1:15的消泡剂和高效助排剂;其中消泡剂由质量比为3:2的硅油和乳化剂混合而成;其中高效助排剂为氟碳表面活性剂。本发明的产品具有低摩阻、低膨胀、低伤害、易返排、性能稳定和溶胀速度快等特性,具有类似清洁压裂液的特点,性能好、易于在线配制、适应性强,能够满足不同页岩油气井压裂的需要。

Description

页岩油气井压裂用试剂及其产品 技术领域
本发明涉及油气井的开采领域,具体的说,涉及一种页岩油气井压裂用试剂及其产品。
背景技术
页岩气属非常规油气藏,我国页岩气资源十分丰富,特别是四川盆地分布广,勘探潜力巨大。四川盆地仅评价的寒武系和志留系两套页岩,页岩气资源量就相当于四川盆地常规天然气资源量的1.5~2.5倍;四川筇竹寺页岩和龙马溪组页岩两套地层的页岩气资源量就达到6.8~8.4×1012m3
页岩具有超低的渗透性,储层脆性也不相同,多层页岩储层特征和流动机理也极不相同。鉴于页岩的低渗、脆性和不同层间的非均质性,需要在页岩储层建立适当的大面积、高产的裂缝充填网络,使天然气运移最大化。同时,页岩的自身特性决定了其水敏性强,要求压裂液体系具有较好的防膨性能。
与常规油气储层压裂技术不同的是,页岩气储层压裂需要人工创造有足够大的裂缝体积来改善地层连通性和增加单井泄气体积,其无论是在用液规模、加砂量,还是在施工参数(施工排量、压力等)等方面都远远超过常规油气层压裂设计。由此,页岩气压裂是以形成地层网络裂缝为最终改造目的:网络压裂。
网络压裂基本思路是:通过注入大液量的高滤失、高弹性、低粘的液体,这种特殊的液体是用来探寻微裂缝,而不是象粘度较高的液体那样用来扩展和加宽主裂缝,同时使用少量砂作为筑堤砂的介质,使暴露的裂缝面上产生更高的压差,从而使压裂液和砂进入那些随后张开的裂缝,直至井底压力变化表明裂缝已过度扩展。
为了得到一种适合页岩的压裂液,特提出本发明。
技术问题
本发明的一个目的在于提供一种页岩油气井压裂用试剂;
本发明的另一个目的在于提供一种页岩气井压裂用滑溜水;
本发明的又一目的在于提供一种页岩气井网络用线性胶;
本发明的又一目的在于提供一种页岩油井网络压裂用滑溜水;
本发明的再一目的在于提供一种页岩油井网络压裂用线性胶。
技术解决方案
为达上述目的,一方面,本发明提供了一种页岩油气井压裂用试剂,所述试剂包含重量比为1∶15的消泡剂和高效助排剂;
其中消泡剂由重量比为3∶2的硅油和乳化剂混合而成;
其中高效助排剂为氟碳表面活性剂。
根据本发明所述的试剂,所述的硅油为本领域常规市售试剂,任何市售的符合相关质量标准的硅油均可用于本发明,譬如为斯洛柯化学有限公司生产的型号为9706的乳化硅油;
根据本发明所述的试剂,所述的乳化剂为本领域常规市售试剂,任何市售的符合相关质量标准的乳化剂均可用于本发明,譬如为非离子型乳化剂,优选为对辛基苯酚聚氧乙烯醚;
其中所述的对辛基苯酚聚氧乙烯醚为本领域常规市售试剂,任何市售的符合相关质量标准的对辛基苯酚聚氧乙烯醚均可用于本发明,譬如为Chemical Book生产的型号为ADS的对辛基苯酚聚氧乙烯醚。
根据本发明所述的试剂,其中所述氟碳表面活性剂为聚四氟乙烯。
另一方面,本发明还提供了一种含有本发明所述试剂的页岩气井压裂用滑溜水,所述滑溜水由如下重量百分比成分制备而成:0.2%高效减阻剂、0.5%复合防膨剂、0.02%消泡剂、0.3%高效助排剂、余量为清水;
其中高效减阻剂由重量比为2∶2∶1∶2∶2的粘弹性表面活性剂、聚丙烯酰胺、AMPS(2-丙烯酰胺-2-甲基丙磺酸)、N-异丙基丙烯酰胺和庚二酰混合而成。
根据本发明所述的页岩气井压裂用滑溜水,其中所述粘弹性表面活性剂为两性离子型粘弹性表面活性剂;
所述的两性离子型粘弹性表面活性剂为本领域常规市售试剂,譬如为益民化工生产的型号为YM-6的两性离子型粘弹性表面活性剂;
所述的聚丙烯酰胺为本领域常规市售试剂,任何市售的符合相关质量标准的聚丙烯酰胺均可用于本发明,譬如为吉化聚盛生产的型号为JHJ15的聚丙烯酰胺;
AMPS、N-异丙基丙烯酰胺和庚二酰均为本领域常规市售试剂,任何市售的符合相关质量标准的上述试剂均可用于本发明。
其中复合防膨剂由质量比为2∶3∶1的2-氯乙基三甲基氯化铵防膨剂、阳离子聚季铵盐、聚季磷酸盐混合而成;
其中高效助排剂为氟碳表面活性剂。
其中所述的防膨剂为本领域常规市售试剂,任何市售的符合相关质量标准的防膨剂均可用于本发明,譬如阿拉丁生产的型号为C113520的2-氯乙基三甲基氯化铵防膨剂;
其中所述的阳离子聚季铵盐为本领域常规市售试剂,任何市售的符合相关质量标准的阳离子聚季铵盐均可用于本发明,譬如可以为市售的以氯乙酸乙二醇双酯、氯乙酸三羟甲基丙烷三酯、氯乙酸季戊四醇四酯和长链叔胺为原料,异丙醇为溶剂,合成的阳离子聚季铵盐;
所述的聚季磷酸盐为本领域常规市售试剂,任何市售的符合相关质量标准的聚季磷酸盐均可用于本发明,譬如为江苏飞翔生产的型号为35429-15的聚季磷酸盐。
又一方面,本发明还提供了一种含有本发明所述试剂的页岩气井网络用线性胶,所述线性胶由如下重量百分比成分制备而成:0.3%低分子稠化剂、0.2%流变助剂、0.3%高效助排剂、0.02%消泡剂、0.05%粘度调节剂、余量为清水;
其中所述低分子稠化剂由重量比为1∶2∶1∶2∶2∶1∶1的粘弹性表面活性剂、聚丙烯酰胺、AMPS、甲基丙烯酰氧三甲基氯化铵、N-异丙基丙烯酰胺、庚二酰、片碱混合而成。
根据本发明所述的页岩气井网络用线性胶,其中所述的粘弹性表面活性剂为本领域常规市售试剂,任何市售的符合相关质量标准的粘弹性表面活性剂均可用于本发明,譬如为两性离子型粘弹性表面活性剂;
其中所述的两性离子型粘弹性表面活性剂为本领域常规市售试剂,譬如为益民化工生产的型号为YM-6的两性离子型粘弹性表面活性剂;
所述的聚丙烯酰胺为本领域常规市售试剂,任何市售的符合相关质量标准的聚丙烯酰胺均可用于本发明,譬如为吉化聚盛生产的型号为JHJ15的聚丙烯酰胺;
AMPS、甲基丙烯酰氧三甲基氯化铵、N-异丙基丙烯酰胺、片碱和庚二酰均为本领域常规市售试剂,任何市售的符合相关质量标准的上述试剂均可用于本发 明。
其中所述流变助剂由质量比为1∶3的粘弹性表面活性剂和乙醇混合而成;
其中粘度调节剂由质量比为2∶3∶1的过硫酸钾、过硫酸铵、柠檬酸混合而成。
又一方面,本发明提供一种含有本发明所述试剂的页岩油井网络压裂用滑溜水,所述滑溜水由如下重量百分比成分制备而成:0.2%高效减阻剂、0.5%复合防膨剂、0.02%消泡剂、0.3%高效助排剂、0.15%岩石润湿改进剂、余量为清水;
其中高效减阻剂由重量比为2∶2∶1∶2∶2的粘弹性表面活性剂、聚丙烯酰胺、AMPS、N-异丙基丙烯酰胺和庚二酰混合而成。
根据本发明所述的页岩油井网络压裂用滑溜水,其中所述粘弹性表面活性剂为两性离子型粘弹性表面活性剂;
其中所述的两性离子型粘弹性表面活性剂为本领域常规市售试剂,譬如为益民化工生产的型号为YM-6的两性离子型粘弹性表面活性剂;
所述的聚丙烯酰胺为本领域常规市售试剂,任何市售的符合相关质量标准的聚丙烯酰胺均可用于本发明,譬如为吉化聚盛生产的型号为JHJ15的聚丙烯酰胺;
AMPS、N-异丙基丙烯酰胺和庚二酰均为本领域常规市售试剂,任何市售的符合相关质量标准的上述试剂均可用于本发明。
其中复合防膨剂由质量比为2∶3∶1的防膨剂、阳离子聚季铵盐、聚季磷酸盐混合而成;
其中所述的防膨剂为本领域常规市售试剂,任何市售的符合相关质量标准的防膨剂均可用于本发明,譬如阿拉丁生产的型号为C113520的2-氯乙基三甲基氯化铵防膨剂;
其中所述的阳离子聚季铵盐为本领域常规市售试剂,任何市售的符合相关质量标准的阳离子聚季铵盐均可用于本发明,譬如可以为以氯乙酸乙二醇双酯、氯乙酸三羟甲基丙烷三酯、氯乙酸季戊四醇四酯和长链叔胺为原料,异丙醇为溶剂,合成的阳离子聚季铵盐;
所述的聚季磷酸盐为本领域常规市售试剂,任何市售的符合相关质量标准的聚季磷酸盐均可用于本发明,譬如为江苏飞翔生产的型号为35429-15的聚季磷酸盐。
其中岩石润湿改进剂为非离子表面活性剂;
其中所述的非离子表面活性剂为本领域常规市售试剂,任何市售的符合相关质量标准的非离子表面活性剂均可用于本发明,譬如为乙二醇环氧乙烷。
再一方面,本发明提供一种含有本发明所述试剂的页岩油井网络压裂用线性胶,所述线性胶由如下重量百分比成分制备而成:0.3%低分子稠化剂、0.2%流变助剂、0.3%高效助排剂、0.15%岩石润湿改进剂、0.02%消泡剂、0.05%粘度调节剂、余量为清水;
其中所述低分子稠化剂由重量比为1∶2∶1∶2∶2∶1∶1的粘弹性表面活性剂、聚丙烯酰胺、AMPS、甲基丙烯酰氧三甲基氯化铵、N-异丙基丙烯酰胺、庚二酰、片碱混合而成;
根据本发明所述的页岩油井网络压裂用线性胶,其中所述的粘弹性表面活性剂为本领域常规市售试剂,任何市售的符合相关质量标准的粘弹性表面活性剂均可用于本发明,譬如为两性离子型粘弹性表面活性剂;
其中所述的两性离子型粘弹性表面活性剂为本领域常规市售试剂,譬如为益民化工生产的型号为YM-6的两性离子型粘弹性表面活性剂;
所述的聚丙烯酰胺为本领域常规市售试剂,任何市售的符合相关质量标准的聚丙烯酰胺均可用于本发明,譬如为吉化聚盛生产的型号为JHJ15的聚丙烯酰胺;
AMPS、甲基丙烯酰氧三甲基氯化铵、N-异丙基丙烯酰胺、片碱和庚二酰均为本领域常规市售试剂,任何市售的符合相关质量标准的上述试剂均可用于本发明。
其中所述流变助剂由重量比为1∶3的粘弹性表面活性剂和乙醇混合而成。
其中岩石润湿改进剂为非离子表面活性剂;
其中所述的非离子表面活性剂为本领域常规市售试剂,任何市售的符合相关质量标准的非离子表面活性剂均可用于本发明,譬如为乙二醇环氧乙烷。
其中粘度调节剂由质量比为2∶3∶1的过硫酸钾、过硫酸铵、柠檬酸混合而成。
有益效果
综上所述,本发明提供了一种页岩油气井压裂用线性胶和滑溜水。本发明的线性胶和滑溜水具有低摩阻、低膨胀、低伤害、易返排、性能稳定和溶胀速度快 等特性,具有类似清洁压裂液的特点,性能好、易于在线配制、适应性强,能够满足不同页岩油气井压裂的需要。
附图说明
图1、图2为高效减阻剂室内和50mm连续油管1000m摩阻性能测试结果;
图3为高效助排剂与接触角、表界面张力关系图;
图4为高效助排剂与返排率关系图;
图5为防膨剂防膨性能图;
图6为低分子稠化剂增粘性能图;
图7为低分子稠化剂表面张力与浓度的关系图;
图8为51/2″套管滑溜水实测摩阻曲线图;
图9为51/2″套管已压裂井滑溜水实测摩阻曲线图;
图10为SRFR滑溜水41/2″油管摩阻性能曲线图;
图11为滑溜水返排率图表;
图12为滑溜水防膨率图表;
图13为SRFR线性胶在200~1000s-1剪切速率下的降阻率测定图;
图14为现场水线性胶返排率图;
图15为现场水线性胶防膨率图;
图16、图17为SRFR滑溜水现场应用效果图;
图18为加沙压裂施工曲线。
本发明的实施方式
以下通过具体实施例详细说明本发明的实施过程和产生的有益效果,旨在帮助阅读者更好地理解本发明的实质和特点,不作为对本案可实施范围的限定。
制备实施例1
一种页岩油气井压裂用试剂,所述试剂由重量比为1∶15的消泡剂和聚四氟乙烯混合而成;其中消泡剂由重量比为3∶2的硅油和对辛基苯酚聚氧乙烯醚混合而成。
其中所述硅油为斯洛柯化学公司生产的型号为9706的乳化硅油;
其中所述对辛基苯酚聚氧乙烯醚为Chemical Book生产的型号为ADS的对辛基苯酚聚氧乙烯醚;
其中所述聚四氟乙烯为巨化化工生产的型号为JHHG12的聚四氟乙烯。
制备实施例2
一种页岩气井压裂用滑溜水,所述滑溜水由如下重量百分比成分混合制备而成:0.2%高效减阻剂、0.5%复合防膨剂、0.02%消泡剂、0.3%高效助排剂、余量为清水;
其中高效减阻剂由重量比为2∶2∶1∶2∶2的两性离子型粘弹性表面活性剂、聚丙烯酰胺、AMPS(2-丙烯酰胺-2-甲基丙磺酸)、N-异丙基丙烯酰胺和庚二酰混合而成。
所述的两性离子型粘弹性表面活性剂为益民化工生产的型号为YM-6的两性离子型粘弹性表面活性剂;
所述的聚丙烯酰胺为吉化聚盛生产的型号为JHJ15的聚丙烯酰胺;
其中复合防膨剂由质量比为2∶3∶1的防膨剂、阳离子聚季铵盐、聚季磷酸盐混合而成;
其中所述的防膨剂为阿拉丁生产的型号为C113520的2-氯乙基三甲基氯化铵防膨剂;
其中所述的阳离子聚季铵盐为以质量比为2∶1∶3∶2的氯乙酸乙二醇双酯、氯乙酸三羟甲基丙烷三酯、氯乙酸季戊四醇四酯和叔胺为原料,异丙醇(与原料质量比2∶4)为溶剂,在150℃下反应3小时制备阳离子聚季铵盐;
所述的聚季磷酸盐为江苏飞翔生产的型号为35429-15的聚季磷酸盐。
所述消泡剂和高效助排剂如制备实施例1所制备。
制备实施例3
一种页岩气井网络用线性胶,所述线性胶由如下重量百分比成分制备而成:0.3%低分子稠化剂、0.2%流变助剂、0.3%高效助排剂、0.02%消泡剂、0.05%粘度调节剂、余量为清水;
其中所述低分子稠化剂由重量比为1∶2∶1∶2∶2∶1∶1的两性离子型粘弹性表面活性剂、聚丙烯酰胺、AMPS、甲基丙烯酰氧三甲基氯化铵、N-异丙基丙烯酰胺、庚二酰、片碱混合而成。
其中所述的两性离子型粘弹性表面活性剂为益民化工生产的型号为YM-6的两性离子型粘弹性表面活性剂;
所述的聚丙烯酰胺为吉化聚盛生产的型号为JHJ15的聚丙烯酰胺;
其中所述流变助剂由质量比为1∶3的两性离子型粘弹性表面活性剂和乙醇混合而成;
其中粘度调节剂由质量比为2∶3∶1的过硫酸钾、过硫酸铵、柠檬酸混合而成。
所述消泡剂和高效助排剂如制备实施例1所制备。
制备实施例4
又一方面,本发明提供一种含有本发明所述试剂的页岩油井网络压裂用滑溜水,所述滑溜水由如下重量百分比成分制备而成:0.2%高效减阻剂、0.5%复合防膨剂、0.02%消泡剂、0.3%高效助排剂、0.15%岩石润湿改进剂、余量为清水;
其中高效减阻剂由重量比为2∶2∶1∶2∶2的两性离子型粘弹性表面活性剂、聚丙烯酰胺、AMPS、N-异丙基丙烯酰胺和庚二酰混合而成。
所述的两性离子型粘弹性表面活性剂为益民化工生产的型号为YM-6的两性离子型粘弹性表面活性剂;
所述的聚丙烯酰胺为吉化聚盛生产的型号为JHJ15的聚丙烯酰胺;
其中复合防膨剂由质量比为2∶3∶1的防膨剂、阳离子聚季铵盐、聚季磷酸盐混合而成;
其中所述的防膨剂为阿拉丁生产的型号为C113520的2-氯乙基三甲基氯化铵的防膨剂;
其中所述的阳离子聚季铵盐为以质量比为2∶1∶3∶2的氯乙酸乙二醇双酯、氯乙酸三羟甲基丙烷三酯、氯乙酸季戊四醇四酯和叔胺为原料,异丙醇(与原料质量比2∶4)为溶剂,在150℃下反应3小时制备阳离子聚季铵盐;
所述的聚季磷酸盐为江苏飞翔生产的型号为35429-15的聚季磷酸盐。
其中岩石润湿改进剂为乙二醇环氧乙烷。
所述消泡剂和高效助排剂如制备实施例1所制备。
制备实施例5
再一方面,本发明提供一种含有本发明所述试剂的页岩油井网络压裂用线性胶,所述线性胶由如下重量百分比成分制备而成:0.3%低分子稠化剂、0.2%流变助剂、0.3%高效助排剂、0.15%岩石润湿改进剂、0.02%消泡剂、0.05%粘度调节剂、余量为清水;
其中所述低分子稠化剂由重量比为1∶2∶1∶2∶2∶1∶1的两性离子型粘弹性表面活性剂、聚丙烯酰胺、AMPS、甲基丙烯酰氧三甲基氯化铵、N-异丙基丙烯酰胺、庚二酰、片碱混合而成;
其中所述的两性离子型粘弹性表面活性剂为益民化工生产的型号为YM-6的两性离子型粘弹性表面活性剂;
所述的聚丙烯酰胺为吉化聚盛生产的型号为JHJ15的聚丙烯酰胺;
其中所述流变助剂由重量比为1∶3的两性离子型粘弹性表面活性剂和乙醇混合而成。
其中岩石润湿改进剂为乙二醇环氧乙烷;
其中粘度调节剂由质量比为2∶3∶1的过硫酸钾、过硫酸铵、柠檬酸混合而成。
所述消泡剂和高效助排剂如制备实施例1所制备。
应用实施例1
SRFR滑溜水及线性胶现场均具备采用连续混配的施工能力,可以满足混砂车10-15m3/min的施工排量要求。
按照页岩油气井滑溜水及线性胶各添加剂配比,按照以下添加剂加入顺序,加入连续混配车搅拌罐,配制成液体供给混砂车。
滑溜水添加剂加入顺序:高效减阻剂-复合防膨剂-消泡剂-高效助排剂/岩石润湿改进剂-高效减阻剂-复合防膨剂-消泡剂-高效助排剂。
线性胶添加剂加入顺序:低分子稠化剂-流变助剂-高效助排剂-消泡剂-粘度调节剂/岩石润湿改进剂-低分子稠化剂-流变助剂-高效助排剂-消泡剂-粘度调节剂。
没有连续混配车的情况下,可以采取大排量射流循环的配制方法,也能满足给混砂车提供10-14m3/min的施工排量要求。添加剂加入顺序与连续混配相同。
现场应用情况:
SRFR滑溜水在东峰2、元页HF-1、焦页1HF、彭页3HF、涪页3-2HF等井得到成功应用,应用最大井深4985m,最高闭合压力93MPa,最高泥质含量98%,单段最大加砂126m3,单井最大用液量4.6万方,最高排量15.5m3/min,最高段数22段,完全满足水平井大型压裂需求。如图16、17所示。
元页HF-1井滑溜水体系降阻性能良好,第五段压裂施工排量 12.1-14.1m3/min,泵压80.2-90.0MPa,液体降阻率在70-75%。焦页1HF井滑溜水实际携砂能力表现良好,砂比达18%。
SRFR线性胶目前已在元页HF-1、焦页1HF、彭页3HF、涪页3-2HF等井成功使用,最高砂比32%。
焦页1HF井现场取样测定静态悬砂性能,砂比为20%覆膜砂悬浮22小时不沉砂。
如图18所示,焦页1HF井应用表明,线性胶表现为明显的粘弹性特征,现场实际应用最高砂比达32%。
试验例1
高效减阻剂性能测试:
表1、高效减阻剂岩心伤害实验结果
Figure PCTCN2014095329-appb-000001
高效减阻剂室内和50mm连续油管1000m摩阻性能测试结果如图1、图2所示。
室内实验测定,0.15%SRFR-1水溶液降阻率为60%,0.2%SRFR-1水溶液降阻率为70%。
试验例2
高效助排剂性能测试:
如图3、图4所示,采用0.3%SRSR-2高效助排剂时接触角最大,排出率为50%。
试验例3
复合防膨剂防膨性能测试:
表2、本发明复合防膨剂测试
序号 试剂名称及浓度 膨胀高度
1 清水 0.51
2 煤油 0.02
3 2%氯化钾 0.45
4 4%氯化钾 0.43
5 6%氯化钾 0.40
6 0.5%高效防膨剂 0.41
7 1.0%高效防膨剂 0.38
8 1.5%高效防膨剂 0.36
如表2和图5所示,实验结果表明,0.5%SRCS-2复合防膨剂防膨性能最佳。
试验例4
低分子稠化剂性能测试:
如图6所示,本发明的低分子稠化剂具有高效增粘能力,稠化剂浓度与基液粘度几乎呈线性关系。
本发明的低分子稠化剂的表面张力性能如图7所示。
试验例5
本发明滑溜水性能测试:
(1)降阻性能
如图8、图9所示,51/2″套管注入时降阻率为70%;
如图10所示,41/2″油管注入时降阻率为78%。
(2)返排率
如图11所示,用现场山泉水、小溪水及自来水配制的滑溜水具有较好的助排作用,满足现场施工要求。
(3)防膨率
如图12所示,现场配制的滑溜水具有好的防膨效果。
(4)与岩石的润湿性
实验表明经过4小时配伍后本发明滑溜水与天然岩屑配伍良好,不存在润湿反转现象。
(5)与高矿化度地层水及凝析油的配伍性
实验表明本发明滑溜水与地层水及凝析油配伍良好,没有出现反凝析现象。
试验例6
本发明线性胶性能测试:
(1)降阻性能
如图13所示,通过与清水摩阻图版对比,本发明线性胶在200~1000s-1剪切速率下的降阻率为清水摩阻的20%~25%。
(2)返排率
如图14所示,用现场山泉水、小溪水及自来水配制的线性胶具有较好的助排作用,满足现场施工要求。
(3)防膨率
如图15所示,现场配制的线性胶具有好的防膨效果。
(4)与岩石的润湿性
实验表明经过4小时配伍后,本发明线性胶与天然岩屑配伍良好,不存在润湿反转现象。
(5)与高矿化度地层水及凝析油的配伍性
实验表明本发明线性胶与地层水及凝析油配伍良好,没有出现反凝析现象。
试验例7
本发明滑溜水及线性胶沉砂速率测定:
表3、本发明滑溜水及线性胶沉砂速率测定表
SRFR-1/SRFR-CH3/% 170s-1/mpa.s 沉砂速率mm/s
0.05 3 33.3
0.1 4.5 16.7
0.15 7.5 13.3
0.2 10.5 8.9
0.25 15 5.9
0.3 25.5 3.9
0.35 33 3.1
0.4 45 0.74
试验例8
本发明滑溜水及线性胶粘弹性特征测定:
表4、本发明滑溜水及线性胶粘弹性特征测定
Figure PCTCN2014095329-appb-000002
试验例9
本发明滑溜水及线性胶稳定性能测定:
实验表明,在-19℃下冷冻120min后,SRFR体系没有明显变化,仍然保持冷冻前的状态,流动性很好,没有出现粘度下降,流动性变差的现象。在夏季酷热天气条件下,长时间放置不会变质,不会影响液体性能。

Claims (10)

  1. 一种页岩油气井压裂用试剂,其特征在于,所述试剂包含质量比为1∶15的消泡剂和高效助排剂;
    其中消泡剂由质量比为3∶2的硅油和乳化剂混合而成;
    其中高效助排剂为氟碳表面活性剂。
  2. 根据权利要求1所述的试剂,其特征在于,所述乳化剂为非离子型乳化剂,优选为对辛基苯酚聚氧乙烯醚。
  3. 根据权利要求1所述的试剂,其特征在于,所述氟碳表面活性剂为聚四氟乙烯。
  4. 一种含有权利要求1~3任意一项所述试剂的页岩气井压裂用滑溜水,其特征在于,所述滑溜水由如下质量百分比成分制备而成:0.2%高效减阻剂、0.5%复合防膨剂、0.02%消泡剂、0.3%高效助排剂、余量为清水;
    其中高效减阻剂由质量比为2∶2∶1∶2∶2的粘弹性表面活性剂、聚丙烯酰胺、AMPS、N-异丙基丙烯酰胺和庚二酰混合而成;
    其中复合防膨剂由质量比为2∶3∶1的防膨剂、阳离子聚季铵盐、聚季磷酸盐混合而成;优选所述防膨剂为2-氯乙基三甲基氯化铵;
    其中消泡剂由重量比为3∶2的硅油和乳化剂混合而成;
    其中高效助排剂为氟碳表面活性剂。
  5. 根据权利要求4所述的滑溜水,其特征在于,所述粘弹性表面活性剂为两性离子型粘弹性表面活性剂。
  6. 一种含有权利要求1~3任意一项所述试剂的页岩气井网络用线性胶,其特征在于,所述线性胶由如下重量百分比成分制备而成:0.3%低分子稠化剂、0.2%流变助剂、0.3%高效助排剂、0.02%消泡剂、0.05%粘度调节剂、余量为清水;
    其中所述低分子稠化剂由质量比为1∶2∶1∶2∶2∶1∶1的粘弹性表面活性剂、聚丙烯酰胺、AMPS、甲基丙烯酰氧三甲基氯化铵、N-异丙基丙烯酰胺、庚二酰、片碱混合而成;
    其中所述流变助剂由质量比为1∶3的粘弹性表面活性剂和乙醇混合而成;
    其中高效助排剂为氟碳表面活性剂;
    其中消泡剂由质量比为3∶2的硅油和乳化剂混合而成;
    其中粘度调节剂由质量比为2∶3∶1的过硫酸钾、过硫酸铵、柠檬酸混合而成。
  7. 一种含有权利要求1~3任意一项所述试剂的页岩油井网络压裂用滑溜水,其特征在于,所述滑溜水由如下质量百分比成分制备而成:0.2%高效减阻剂、0.5%复合防膨剂、0.02%消泡剂、0.3%高效助排剂、0.15%岩石润湿改进剂、余量为清水;
    其中高效减阻剂由质量比为2∶2∶1∶2∶2的粘弹性表面活性剂、聚丙烯酰胺、AMPS、N-异丙基丙烯酰胺和庚二酰混合而成;
    其中复合防膨剂由质量比为2∶3∶1的防膨剂、阳离子聚季铵盐、聚季磷酸盐混合而成;
    其中消泡剂由质量比为3∶2的硅油和乳化剂混合而成;
    其中高效助排剂为氟碳表面活性剂;
    其中岩石润湿改进剂为非离子表面活性剂。
  8. 根据权利要求7所述的滑溜水,其特征在于,所述非离子表面活性剂为乙二醇环氧乙烷。
  9. 一种含有权利要求1~3任意一项所述试剂的页岩油井网络压裂用线性胶,其特征在于,所述线性胶由如下质量百分比成分制备而成:0.3%低分子稠化剂、0.2%流变助剂、0.3%高效助排剂、0.15%岩石润湿改进剂、0.02%消泡剂、0.05%粘度调节剂、余量为清水;
    其中所述低分子稠化剂由质量比为1∶2∶1∶2∶2∶1∶1的粘弹性表面活性剂、聚丙烯酰胺、AMPS、甲基丙烯酰氧三甲基氯化铵、N-异丙基丙烯酰胺、庚二酰、片碱混合而成;
    其中所述流变助剂由质量比为1∶3的粘弹性表面活性剂和乙醇混合而成;
    其中高效助排剂为氟碳表面活性剂;
    其中岩石润湿改进剂为非离子表面活性剂;
    其中消泡剂由质量比为3∶2的硅油和乳化剂混合而成;
    其中粘度调节剂由质量比为2∶3∶1的过硫酸钾、过硫酸铵、柠檬酸混合而成。
  10. 根据权利要求9所述的线性胶,其特征在于,所述非离子表面活性剂为乙二醇环氧乙烷。
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