CN115785919A - Application of nonionic surfactant as plugging agent in drilling fluid - Google Patents
Application of nonionic surfactant as plugging agent in drilling fluid Download PDFInfo
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- CN115785919A CN115785919A CN202211418523.9A CN202211418523A CN115785919A CN 115785919 A CN115785919 A CN 115785919A CN 202211418523 A CN202211418523 A CN 202211418523A CN 115785919 A CN115785919 A CN 115785919A
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- nonionic surfactant
- water
- surfactant
- plugging
- plugging agent
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- 239000002736 nonionic surfactant Substances 0.000 title claims abstract description 87
- 238000005553 drilling Methods 0.000 title claims abstract description 48
- 239000012530 fluid Substances 0.000 title claims abstract description 42
- 239000003795 chemical substances by application Substances 0.000 title abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 80
- 239000002981 blocking agent Substances 0.000 claims description 44
- 239000003945 anionic surfactant Substances 0.000 claims description 40
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 150000003839 salts Chemical class 0.000 claims description 24
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 19
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 19
- 239000003002 pH adjusting agent Substances 0.000 claims description 10
- -1 polyol ester Chemical class 0.000 claims description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 6
- 229920000570 polyether Polymers 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 5
- 150000001540 azides Chemical class 0.000 claims description 4
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 4
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 4
- 229960000583 acetic acid Drugs 0.000 claims description 3
- 150000001805 chlorine compounds Chemical group 0.000 claims description 3
- 239000012362 glacial acetic acid Substances 0.000 claims description 3
- 229920005862 polyol Polymers 0.000 claims description 3
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 claims description 3
- 239000001117 sulphuric acid Substances 0.000 claims 1
- 235000011149 sulphuric acid Nutrition 0.000 claims 1
- 239000004094 surface-active agent Substances 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 8
- 239000002245 particle Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 description 38
- 239000000440 bentonite Substances 0.000 description 18
- 229910000278 bentonite Inorganic materials 0.000 description 18
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 18
- 239000002002 slurry Substances 0.000 description 18
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 16
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 14
- 238000001914 filtration Methods 0.000 description 12
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 8
- 239000003112 inhibitor Substances 0.000 description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 description 8
- 239000011259 mixed solution Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical group CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 6
- 239000000706 filtrate Substances 0.000 description 6
- 229910052708 sodium Inorganic materials 0.000 description 5
- 239000011734 sodium Substances 0.000 description 5
- XFRVVPUIAFSTFO-UHFFFAOYSA-N 1-Tridecanol Chemical compound CCCCCCCCCCCCCO XFRVVPUIAFSTFO-UHFFFAOYSA-N 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- 235000019270 ammonium chloride Nutrition 0.000 description 4
- 239000010426 asphalt Substances 0.000 description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 239000010428 baryte Substances 0.000 description 4
- 229910052601 baryte Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 150000003138 primary alcohols Chemical class 0.000 description 4
- 239000008213 purified water Substances 0.000 description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 3
- RZXLPPRPEOUENN-UHFFFAOYSA-N Chlorfenson Chemical compound C1=CC(Cl)=CC=C1OS(=O)(=O)C1=CC=C(Cl)C=C1 RZXLPPRPEOUENN-UHFFFAOYSA-N 0.000 description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- DUIOKRXOKLLURE-UHFFFAOYSA-N 2-octylphenol Chemical compound CCCCCCCCC1=CC=CC=C1O DUIOKRXOKLLURE-UHFFFAOYSA-N 0.000 description 2
- PXIPVTKHYLBLMZ-UHFFFAOYSA-N Sodium azide Chemical compound [Na+].[N-]=[N+]=[N-] PXIPVTKHYLBLMZ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- PYIDGJJWBIBVIA-UYTYNIKBSA-N lauryl glucoside Chemical compound CCCCCCCCCCCCO[C@@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O PYIDGJJWBIBVIA-UYTYNIKBSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LQZZUXJYWNFBMV-UHFFFAOYSA-N 1-dodecanol group Chemical group C(CCCCCCCCCCC)O LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229920001213 Polysorbate 20 Polymers 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- JNGWKQJZIUZUPR-UHFFFAOYSA-N [3-(dodecanoylamino)propyl](hydroxy)dimethylammonium Chemical group CCCCCCCCCCCC(=O)NCCC[N+](C)(C)[O-] JNGWKQJZIUZUPR-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 235000010980 cellulose Nutrition 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229940026210 lauramidopropylamine oxide Drugs 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 description 1
- 239000000256 polyoxyethylene sorbitan monolaurate Substances 0.000 description 1
- 235000010486 polyoxyethylene sorbitan monolaurate Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000000230 xanthan gum Substances 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
- 229940082509 xanthan gum Drugs 0.000 description 1
- 235000010493 xanthan gum Nutrition 0.000 description 1
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- Detergent Compositions (AREA)
Abstract
The invention relates to the technical field of plugging agents, and provides an application of a nonionic surfactant serving as a plugging agent in drilling fluid. The invention uses the nonionic surfactant or the compound surfactant to form a plugging agent and applies the plugging agent to the drilling fluid, the plugging agent uses the cloud point property of the plugging agent to convert from a liquid state to a solid particle state at a certain temperature, and the problem that effective plugging cannot be formed in a stratum due to the overlarge particle size of the plugging material is effectively solved. Meanwhile, the plugging agent is in a liquid state in the initial state, and forms solid particles after the ambient temperature reaches a certain range, so that the plugging agent effectively solves the problem of leakage of the micro/nano pore gap stratum. The plugging agent provided by the invention has the advantages of wide temperature application range, wide raw material selectivity, low cost, suitability for various drilling fluid systems, small influence on system performance, simple steps in the using process and convenience in application.
Description
Technical Field
The invention relates to the technical field of plugging agents, in particular to application of a nonionic surfactant serving as a plugging agent in drilling fluid.
Background
With the rapid development of economy, the energy demand is more and more, the development of oil and gas resources is promoted to present the characteristics of diversification, and the exploitation object is complicated. And therefore the unknown problems faced in oil and gas drilling are increasing. In order to ensure safe and efficient drilling, the requirements on the performance of various aspects of drilling fluid in the drilling process are higher and higher. However, a large amount of literature research finds that with the development of a large amount of shale gas, the drilling depth is larger and larger, drilling encounters more and more complex strata, and the requirements on the leakage prevention and stoppage of the drilling fluid are higher and higher. The current commonly used plugging materials in the drilling fluid mainly comprise celluloses, asphalts, gels and high molecular polymers, but long-term application finds that the plugging materials generally have the problems of poor temperature resistance or unqualified effective plugging, for example, the asphalt plugging materials seriously affect the rheological property of the drilling fluid after high-temperature aging, the gel or high molecular polymer materials are volatile in high-temperature environment, and meanwhile, part of the plugging materials cannot enter stratum pores because the particle size of the plugging materials is unqualified, but are attached to the vicinity of a well wall, so that the plugging effect of the plugging materials is lost. Therefore, it is a problem to be solved at present to provide a plugging agent having excellent properties.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an application of a nonionic surfactant as a plugging agent in drilling fluid.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides an application of a nonionic surfactant as a blocking agent in drilling fluid, wherein the nonionic surfactant is a polyoxyethylene ether nonionic surfactant, a polyol ester nonionic surfactant, a nitrogen-containing nonionic surfactant or a block polyether nonionic surfactant.
Preferably, the blocking agent comprises a nonionic surfactant and water, and the mass ratio of the nonionic surfactant to the water is 1-5: 95 to 99 percent;
or the blocking agent comprises a nonionic surfactant and an anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is (0.8-1.2): 0.8 to 1.2.
Preferably, the blocking agent comprises a nonionic surfactant, an anionic surfactant and water;
the mass ratio of the nonionic surfactant to the anionic surfactant is 0.8-1.2: 0.8 to 1.2; the mass ratio of the mass sum of the nonionic surfactant and the anionic surfactant to the water is 1-5: 95 to 99 percent.
Preferably, the blocking agent comprises a nonionic surfactant, a salt and water;
the mass ratio of the salt to the water is 2-5: 95 to 98 percent;
the mass ratio of the salt to the water to the nonionic surfactant is 95-99: 1 to 5.
Preferably, the blocking agent comprises a nonionic surfactant, a pH adjuster and water;
the mass ratio of the nonionic surfactant to the water is 1-5: 95 to 99 percent;
the pH value after adding the pH regulator is 5.5-10.
Preferably, the blocking agent comprises a nonionic surfactant, an anionic surfactant, a salt and water;
the mass ratio of the nonionic surfactant to the anionic surfactant is 0.8-1.2: 0.8 to 1.2;
the mass ratio of the salt to the water is 2-5: 95 to 98 percent;
the mass ratio of the mass sum of the nonionic surfactant and the anionic surfactant to the mass sum of the salt and the water is 1-5: 95 to 99 percent.
Preferably, the blocking agent comprises a nonionic surfactant, an anionic surfactant, a pH adjuster and water;
the mass ratio of the nonionic surfactant to the anionic surfactant is 0.8-1.2: 0.8 to 1.2;
the mass ratio of the mass sum of the nonionic surfactant and the anionic surfactant to the mass sum of the pH regulator and the water is (1-5): 95 to 99 percent;
the pH value after adding the pH regulator is 5.5-10.
Preferably, the anionic surfactant is a sulfonate or sulfate salt.
Preferably, the salt is a chloride, azide or sulfate salt.
Preferably, the pH regulator is hydrochloric acid, sulfuric acid, glacial acetic acid, or sodium hydroxide.
The invention has the beneficial effects that:
(1) The invention uses non-ionic surface active agent or compound surface active agent to form a temperature-sensitive plugging agent and applies the temperature-sensitive plugging agent in drilling fluid, the plugging agent uses the cloud point property of the plugging agent to change from liquid state to solid particle state at a certain temperature, and the problem that effective plugging can not be formed in stratum due to overlarge particle size of plugging material is effectively solved. Meanwhile, the plugging agent is in a liquid state in the initial state, and forms solid particles after the ambient temperature reaches a certain range, so that the plugging agent effectively solves the problem of leakage of the micro/nano pore gap stratum.
(2) The blocking agent provided by the invention has the advantages of wide temperature application range, wide raw material selectivity, low cost, suitability for various drilling fluid systems, small influence on system performance, simple steps in the using process and convenience in application, and the preparation and application of the temperature-sensitive blocking agent provide more effective solutions for the problems of stratum loss and the like in the drilling process.
Detailed Description
The invention provides an application of a nonionic surfactant as a blocking agent in drilling fluid, wherein the nonionic surfactant is a polyoxyethylene ether nonionic surfactant, a polyol ester nonionic surfactant, a nitrogen-containing nonionic surfactant or a block polyether nonionic surfactant.
In the invention, the polyoxyethylene ether nonionic surfactant is preferably lauryl alcohol polyoxyethylene ether, octyl phenol polyoxyethylene ether, primary alcohol polyoxyethylene ether, polyoxyethylene cetyl ether or isomeric tridecanol polyoxyethylene ether; the polyalcohol ester nonionic surfactant is preferably polyoxyethylene sorbitan monolaurate TW-20 or dodecyl glucoside; the nitrogen-containing nonionic surfactant is preferably lauramidopropyl amine oxide; the block polyether type nonionic surfactant is preferably propylene glycol block polyether.
In the present invention, the blocking agent comprises a nonionic surfactant and water, and the mass ratio of the nonionic surfactant to the water is preferably 1 to 5:95 to 99, more preferably 2 to 4:96 to 98, more preferably 2.5 to 3.5:96.5 to 97.5;
or the blocking agent comprises a nonionic surfactant and an anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is preferably 0.8-1.2: 0.8 to 1.2, more preferably 0.9 to 1.1:0.9 to 1.1, more preferably 0.95 to 1.05:0.95 to 1.05.
In the present invention, the blocking agent comprises a nonionic surfactant, an anionic surfactant and water;
the mass ratio of the nonionic surfactant to the anionic surfactant is preferably 0.8 to 1.2:0.8 to 1.2, more preferably 0.9 to 1.1:0.9 to 1.1, more preferably 0.95 to 1.05:0.95 to 1.05; the mass sum of the nonionic surfactant and the anionic surfactant to the water is preferably 1 to 5:95 to 99, more preferably 2 to 4:96 to 98, more preferably 2.5 to 3.5:96.5 to 97.5.
In the present invention, the blocking agent comprises a nonionic surfactant, a salt and water;
the mass ratio of the salt to the water is preferably 2 to 5:95 to 98, more preferably 3 to 4:96 to 97, more preferably 3.2 to 3.8:96.2 to 96.8;
the mass sum of the salt and water and the mass ratio of the nonionic surfactant are preferably 95 to 99:1 to 5, more preferably 96 to 98:2 to 4, more preferably 96.5 to 97.5:2.5 to 3.5.
In the present invention, the blocking agent comprises a nonionic surfactant, a pH adjuster, and water;
the mass ratio of the nonionic surfactant to water is preferably 1 to 5:95 to 99, more preferably 2 to 4:96 to 98, more preferably 2.5 to 3.5:96.5 to 97.5;
the pH value after the addition of the pH adjustor is preferably 5.5 to 10, more preferably 6.5 to 9, and still more preferably 7.5 to 8.
In the present invention, the blocking agent comprises a nonionic surfactant, an anionic surfactant, a salt and water;
the mass ratio of the nonionic surfactant to the anionic surfactant is preferably 0.8 to 1.2:0.8 to 1.2, more preferably 0.9 to 1.1:0.9 to 1.1, more preferably 0.95 to 1.05:0.95 to 1.05;
the mass ratio of the salt to the water is preferably 2 to 5:95 to 98, more preferably 3 to 4:96 to 97, more preferably 3.2 to 3.8:96.2 to 96.8;
the mass ratio of the sum of the masses of the nonionic surfactant and the anionic surfactant to the sum of the masses of the salt and the water is preferably 1 to 5:95 to 99, more preferably 2 to 4:96 to 98, more preferably 2.5 to 3.5:96.5 to 97.5.
In the present invention, the blocking agent comprises a nonionic surfactant, an anionic surfactant, a pH adjuster and water;
the mass ratio of the nonionic surfactant to the anionic surfactant is preferably 0.8 to 1.2:0.8 to 1.2, more preferably 0.9 to 1.1:0.9 to 1.1, more preferably 0.95 to 1.05:0.95 to 1.05;
the mass ratio of the sum of the masses of the nonionic surfactant and the anionic surfactant to the sum of the masses of the pH regulator and the water is preferably 1 to 5:95 to 99, more preferably 2 to 4:96 to 98, more preferably 2.5 to 3.5:96.5 to 97.5;
the pH value after the addition of the pH adjuster is preferably 5.5 to 10, more preferably 6.5 to 9, and still more preferably 7.5 to 8.
In the present invention, the anionic surfactant is preferably a sulfonate or sulfate.
In the invention, the sulfonate is preferably sodium dodecyl benzene sulfonate or sodium fatty alcohol-polyoxyethylene ether sulfonate; the sulfate is preferably sodium fatty alcohol polyoxyethylene ether sulfate or sodium cocoalcohol sulfate.
In the present invention, the salt is preferably a chloride, azide or sulfate.
In the present invention, the chloride is preferably sodium chloride; the azide is preferably sodium azide; the sulfate is preferably sodium sulfate.
In the present invention, the pH adjuster is preferably hydrochloric acid, sulfuric acid, glacial acetic acid, or sodium hydroxide.
In the present invention, when the blocking agent comprises a nonionic surfactant, the cloud point of the blocking agent is preferably 30 to 100 ℃, more preferably 40 to 90 ℃, and still more preferably 50 to 80 ℃.
In the present invention, when the blocking agent comprises a nonionic surfactant and water, the cloud point of the blocking agent is preferably 30 to 100 ℃, more preferably 40 to 90 ℃, and still more preferably 50 to 80 ℃.
In the present invention, when the blocking agent comprises a nonionic surfactant and an anionic surfactant, the cloud point of the blocking agent is preferably 100 to 200 ℃, more preferably 120 to 180 ℃, and still more preferably 140 to 160 ℃.
In the present invention, when the blocking agent comprises a nonionic surfactant, an anionic surfactant and water, the cloud point of the blocking agent is preferably 100 to 200 ℃, more preferably 120 to 180 ℃, and still more preferably 140 to 160 ℃.
In the present invention, when the blocking agent comprises a nonionic surfactant, a salt and water, the cloud point of the blocking agent is preferably 50 to 150 ℃, more preferably 70 to 130 ℃, and still more preferably 90 to 110 ℃.
In the present invention, when the blocking agent comprises a nonionic surfactant, an anionic surfactant, a salt and water, the cloud point of the blocking agent is preferably 50 to 150 ℃, more preferably 90 to 140 ℃, and still more preferably 100 to 130 ℃.
In the present invention, when the blocking agent comprises a nonionic surfactant, a pH adjusting agent and water, the cloud point of the blocking agent is preferably 50 to 150 ℃, more preferably 70 to 130 ℃, and still more preferably 90 to 110 ℃.
In the present invention, when the blocking agent comprises a nonionic surfactant, an anionic surfactant, a pH adjusting agent and water, the cloud point of the blocking agent is preferably 50 to 150 ℃, more preferably 90 to 140 ℃, and still more preferably 100 to 130 ℃.
In the invention, the primary alcohol polyoxyethylene ether is primary alcohol polyoxyethylene ether AEO-25 purchased from Junxin chemical engineering and technology Limited or primary alcohol polyoxyethylene ether AEO-25 purchased from Haian petrochemical plant; the polyoxyethylene cetyl ether is polyoxyethylene cetyl ether O-30 purchased from Haian petrochemical plants; the isomeric tridecanol polyoxyethylene ether can be isomeric tridecanol polyoxyethylene ether 1310 purchased from Junxin chemical technology Co., ltd, or isomeric tridecanol polyoxyethylene ether E1310 or E1312 purchased from Jining Shunn New Material Co., ltd; the sodium fatty alcohol-polyoxyethylene ether sulfonate is 70 percent of sodium fatty alcohol-polyoxyethylene ether sulfonate purchased from Heizhou Chinese chemical Limited.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
Adding 40g of bentonite and 2g of sodium carbonate into 1L of purified water, stirring at the rotating speed of 800rpm for 1h at room temperature to uniformly mix the bentonite and the sodium carbonate to obtain bentonite base slurry, then maintaining the bentonite base slurry for 24h at the room temperature environment, stirring the bentonite base slurry obtained by maintenance at the rotating speed of 800rpm for 30min, pouring 200mL of the base slurry into a high stirring cup after stirring is finished, adding 1g of tackifying and cutting-improving agent (carboxymethyl cellulose) for water-based drilling fluid into the base slurry, stirring at the rotating speed of 10000rpm for 20min to completely dissolve the tackifying and cutting-improving agent, then adding 4g of fluid loss additive (sulfonated asphalt), stirring at the rotating speed of 10000rpm for 20min to completely dissolve the fluid loss additive, finally adding 2g of inhibitor (ammonium chloride), and stirring at the rotating speed of 10000rpm for 20min to completely dissolve the inhibitor to obtain a mixed solution;
completely dissolving 0.5g of polyoxyethylene lauryl ether in 10mL of deionized water to prepare a single surfactant aqueous solution, adding the single surfactant aqueous solution into the mixed solution, continuously stirring for 20min at the rotating speed of 10000rpm, adding 60g of weighting agent (barite) as required after the stirring for 20min at the rotating speed of 12000rpm, and obtaining the water-based drilling fluid.
The comparative example of this example was set up, the other conditions were controlled unchanged, and no single aqueous surfactant solution was added to obtain a water-based drilling fluid without the addition of a plugging agent. The filtration loss of the water-based drilling fluid obtained in this example and the filtration loss of the water-based drilling fluid without the plugging agent were measured, and the filtration loss of the water-based drilling fluid without the plugging agent was 12mL, and the filtration loss of the plugging agent obtained in this example was 6mL.
Example 2
Adding 38g of bentonite and 1.6g of sodium carbonate into 1L of purified water, stirring at the room temperature for 0.8h at the rotation speed of 900rpm to uniformly mix the bentonite and the sodium carbonate to obtain bentonite base slurry, then maintaining for 23h at the room temperature environment, stirring the bentonite base slurry obtained by maintenance for 26min at the rotation speed of 850rpm, pouring 200mL of the base slurry into a high stirring cup after stirring is finished, adding 1g of tackifying and cutting agent (xanthan gum) for water-based drilling fluid into the base slurry, stirring for 20min at the rotation speed of 10000rpm to completely dissolve the tackifying and cutting agent, then adding 3g of filtrate reducer (SL-2), stirring for 18min at the rotation speed of 10000rpm to completely dissolve the filtrate reducer, finally adding 2g of inhibitor (ammonium chloride), and stirring for 20min at the rotation speed of 10000rpm to completely dissolve the inhibitor to obtain a mixed solution;
adding 4g of sodium chloride into 96mL of water to prepare a saline solution, dissolving 0.5g of octyl phenol polyoxyethylene ether (OP-20) into 10mL of the saline solution to prepare a saline solution with a single surfactant, adding the saline solution into the mixed solution, continuously stirring for 30min at the rotating speed of 9000rpm, adding 58g of weighting agent (barite) as required, and stirring for 18min at the rotating speed of 12500rpm to obtain the water-based drilling fluid.
The comparative example of this example was set up to control other conditions without adding a single surfactant brine solution to produce a water-based drilling fluid without the addition of a blocking agent. The filtration loss of the water-based drilling fluid obtained in this example and the filtration loss of the water-based drilling fluid without the plugging agent were measured, and the filtration loss of the water-based drilling fluid without the plugging agent was 13mL, and the filtration loss of the plugging agent obtained in this example was 7.4mL.
Example 3
Adding 41g of bentonite and 2g of sodium carbonate into 1L of purified water, stirring at the room temperature at the rotating speed of 850rpm for 0.9h to uniformly mix the bentonite and the sodium carbonate to obtain bentonite-based slurry, then maintaining at the room temperature for 23.5h, stirring the bentonite-based slurry obtained by maintenance at the rotating speed of 900rpm for 28min, pouring 200mL of the base slurry into a high stirring cup after stirring is finished, adding 1g of tackifying and cutting agent (carboxymethyl cellulose) for water-based drilling fluid into the base slurry, stirring at the rotating speed of 10000rpm for 19min to completely dissolve the tackifying and cutting agent, then adding 4g of filtrate reducer (sulfonated asphalt), stirring at the rotating speed of 10000rpm for 20min to completely dissolve the filtrate reducer, finally adding 2g of inhibitor (ammonium chloride), and stirring at the rotating speed of 10000rpm for 20min to completely dissolve the inhibitor to obtain a mixed solution;
adding 3g of sodium chloride into 97mL of water to prepare a saline solution, dissolving 0.2g of dodecyl glucoside and 0.2g of sodium dodecyl benzene sulfonate into 10mL of the saline solution to prepare a saline solution of a compound surfactant, adding the saline solution into a mixed solution, continuously stirring for 15min at the rotating speed of 11000rpm, adding 63g of a weighting agent (barite) as required after the stirring is finished, and stirring for 26min at the rotating speed of 11000rpm to obtain the water-based drilling fluid.
The comparative example of this example was set up, and other conditions were controlled to be unchanged, and the brine solution of the compounded surfactant was not added, to obtain a water-based drilling fluid without the addition of the plugging agent. The filtration loss of the water-based drilling fluid obtained in this example and the filtration loss of the water-based drilling fluid without the plugging agent were tested, and the filtration loss of the water-based drilling fluid without the plugging agent was 11.2mL, and the filtration loss of the plugging agent obtained in this example was 6mL.
Example 4
Adding 40g of bentonite and 2g of sodium carbonate into 1L of purified water, stirring at the room temperature for 1.2h at the rotating speed of 750rpm to uniformly mix the bentonite and the sodium carbonate to obtain bentonite-based slurry, then maintaining the bentonite-based slurry for 25h at the room temperature, stirring the bentonite-based slurry obtained by maintenance for 33min at the rotating speed of 750rpm, pouring 200mL of the base slurry into a high stirring cup after stirring is finished, adding 1g of tackifying and cutting agent (carboxymethyl cellulose) for water-based drilling fluid into the base slurry, stirring at the rotating speed of 9000rpm for 21min to completely dissolve the tackifying and cutting agent, then adding 4g of filtrate reducer (sulfonated asphalt), stirring at the rotating speed of 9000rpm for 25min to completely dissolve the filtrate reducer, finally adding 2g of inhibitor (ammonium chloride), and stirring at the rotating speed of 9000rpm for 23min to completely dissolve the inhibitor to obtain a mixed solution;
preparing a sodium hydroxide aqueous solution with the pH value of 8, dissolving 0.3g of propylene glycol block polyether in 10mL of the sodium hydroxide aqueous solution to prepare a sodium hydroxide aqueous solution with a single surfactant, adding the sodium hydroxide aqueous solution into the water-based drilling fluid, continuously stirring for 23min at the rotating speed of 10000rpm, adding 61g of weighting agent (barite) as required after the stirring is finished, and stirring for 21min at the rotating speed of 12000rpm to obtain the water-based drilling fluid.
The comparative example of this example was set up, and other conditions were controlled to be unchanged without adding a single surfactant in aqueous sodium hydroxide solution to obtain a water-based drilling fluid without adding a blocking agent. The water-based drilling fluid obtained in this example and the water-based drilling fluid without the plugging agent were tested for fluid loss, and the fluid loss of the water-based drilling fluid without the plugging agent was 12.2mL, and the fluid loss of the plugging agent obtained in this example was 6.8mL.
According to the embodiments, the plugging agent has the advantages of wide temperature application range, wide raw material selectivity, low cost, suitability for various drilling fluid systems, small influence on the system performance, simple steps in the using process, convenience in application and capability of effectively solving the leakage problem of the micro/nano pore gap stratum.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.
Claims (10)
1. The application of the nonionic surfactant as a blocking agent in the drilling fluid is characterized in that the nonionic surfactant is polyoxyethylene ether nonionic surfactant, polyol ester nonionic surfactant, nitrogen-containing nonionic surfactant or block polyether nonionic surfactant.
2. The use according to claim 1, wherein the blocking agent comprises a nonionic surfactant and water, and the mass ratio of the nonionic surfactant to the water is 1-5: 95 to 99 percent;
or the blocking agent comprises a nonionic surfactant and an anionic surfactant, and the mass ratio of the nonionic surfactant to the anionic surfactant is (0.8-1.2): 0.8 to 1.2.
3. The use of claim 1, wherein the blocking agent comprises a nonionic surfactant, an anionic surfactant, and water;
the mass ratio of the nonionic surfactant to the anionic surfactant is 0.8-1.2: 0.8 to 1.2; the mass sum of the nonionic surfactant and the anionic surfactant to the water is 1-5: 95 to 99 percent.
4. The use of claim 1, wherein the blocking agent comprises a nonionic surfactant, a salt, and water;
the mass ratio of the salt to the water is 2-5: 95 to 98 percent;
the mass sum of the salt and the water and the mass ratio of the salt to the nonionic surfactant are 95-99: 1 to 5.
5. The use of claim 1, wherein the blocking agent comprises a nonionic surfactant, a pH adjusting agent, and water;
the mass ratio of the nonionic surfactant to the water is 1-5: 95 to 99 percent;
the pH value after adding the pH regulator is 5.5-10.
6. The use of claim 1, wherein the blocking agent comprises a nonionic surfactant, an anionic surfactant, a salt, and water;
the mass ratio of the nonionic surfactant to the anionic surfactant is 0.8-1.2: 0.8 to 1.2;
the mass ratio of the salt to the water is 2-5: 95 to 98 percent;
the mass ratio of the mass sum of the nonionic surfactant and the anionic surfactant to the mass sum of the salt and the water is 1-5: 95 to 99 percent.
7. The use of claim 1, wherein the blocking agent comprises a nonionic surfactant, an anionic surfactant, a pH adjusting agent, and water;
the mass ratio of the nonionic surfactant to the anionic surfactant is 0.8-1.2: 0.8 to 1.2;
the mass ratio of the mass sum of the nonionic surfactant and the anionic surfactant to the mass sum of the pH regulator and the water is 1-5: 95 to 99 percent;
the pH value after adding the pH regulator is 5.5-10.
8. Use according to claim 2, 3, 6 or 7 wherein the anionic surfactant is a sulphonate or sulphate salt.
9. Use according to claim 4 or 6, wherein the salt is a chloride, azide or sulphate salt.
10. Use according to claim 5 or 7, wherein the pH regulator is hydrochloric acid, sulphuric acid, glacial acetic acid or sodium hydroxide.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1504527A (en) * | 2002-12-05 | 2004-06-16 | 大庆石油管理局 | High temperature resistant silicate drilling fluid for steady well wall in deep well |
| CN102925121A (en) * | 2012-11-06 | 2013-02-13 | 中国石油大学(华东) | Multifunctional drilling fluid additive and preparation method thereof |
| US20130165351A1 (en) * | 2011-12-21 | 2013-06-27 | Baker Hughes Incorporated | Method to Reduce Salt Necessary to Reach Saturation of Drilling Fluids |
| CN103589407A (en) * | 2013-12-09 | 2014-02-19 | 克拉玛依市金鑫科技有限公司 | Low-surface-tension solid-free reservoir protection drilling fluid |
| CN111454699A (en) * | 2020-04-30 | 2020-07-28 | 扬州润达油田化学剂有限公司 | Preparation method of polyalcohol anti-sloughing inhibitor for environment-friendly drilling fluid salt slurry system |
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- 2022-11-14 CN CN202211418523.9A patent/CN115785919A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1504527A (en) * | 2002-12-05 | 2004-06-16 | 大庆石油管理局 | High temperature resistant silicate drilling fluid for steady well wall in deep well |
| US20130165351A1 (en) * | 2011-12-21 | 2013-06-27 | Baker Hughes Incorporated | Method to Reduce Salt Necessary to Reach Saturation of Drilling Fluids |
| CN102925121A (en) * | 2012-11-06 | 2013-02-13 | 中国石油大学(华东) | Multifunctional drilling fluid additive and preparation method thereof |
| CN103589407A (en) * | 2013-12-09 | 2014-02-19 | 克拉玛依市金鑫科技有限公司 | Low-surface-tension solid-free reservoir protection drilling fluid |
| CN111454699A (en) * | 2020-04-30 | 2020-07-28 | 扬州润达油田化学剂有限公司 | Preparation method of polyalcohol anti-sloughing inhibitor for environment-friendly drilling fluid salt slurry system |
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