CN115197679A - High-temperature-resistant fast drilling agent, preparation method thereof and application thereof in water-based drilling fluid - Google Patents
High-temperature-resistant fast drilling agent, preparation method thereof and application thereof in water-based drilling fluid Download PDFInfo
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- CN115197679A CN115197679A CN202211037091.7A CN202211037091A CN115197679A CN 115197679 A CN115197679 A CN 115197679A CN 202211037091 A CN202211037091 A CN 202211037091A CN 115197679 A CN115197679 A CN 115197679A
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- 238000005553 drilling Methods 0.000 title claims abstract description 263
- 239000012530 fluid Substances 0.000 title claims abstract description 104
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 95
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- 238000002360 preparation method Methods 0.000 title abstract description 21
- 239000000178 monomer Substances 0.000 claims abstract description 32
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003999 initiator Substances 0.000 claims abstract description 22
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 16
- 239000004094 surface-active agent Substances 0.000 claims abstract description 15
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- 150000003242 quaternary ammonium salts Chemical class 0.000 claims abstract description 8
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims abstract description 7
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 7
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- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims abstract description 7
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- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical group [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 10
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
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- XFTALRAZSCGSKN-UHFFFAOYSA-M sodium;4-ethenylbenzenesulfonate Chemical group [Na+].[O-]S(=O)(=O)C1=CC=C(C=C)C=C1 XFTALRAZSCGSKN-UHFFFAOYSA-M 0.000 claims description 7
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- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 claims description 6
- 239000002736 nonionic surfactant Substances 0.000 claims description 6
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 5
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical group CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 claims description 5
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- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- DPBJAVGHACCNRL-UHFFFAOYSA-N 2-(dimethylamino)ethyl prop-2-enoate Chemical compound CN(C)CCOC(=O)C=C DPBJAVGHACCNRL-UHFFFAOYSA-N 0.000 claims description 4
- FGZFESWHQXSPJU-UHFFFAOYSA-N 2-methyl-2-(3,3,3-trifluoropropyl)-1,3,5,2,4,6-trioxatrisilinane Chemical compound FC(F)(F)CC[Si]1(C)O[SiH2]O[SiH2]O1 FGZFESWHQXSPJU-UHFFFAOYSA-N 0.000 claims description 4
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- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 claims description 2
- 229920000536 2-Acrylamido-2-methylpropane sulfonic acid Polymers 0.000 claims description 2
- XHZPRMZZQOIPDS-UHFFFAOYSA-N 2-Methyl-2-[(1-oxo-2-propenyl)amino]-1-propanesulfonic acid Chemical compound OS(=O)(=O)CC(C)(C)NC(=O)C=C XHZPRMZZQOIPDS-UHFFFAOYSA-N 0.000 claims description 2
- ZYAASQNKCWTPKI-UHFFFAOYSA-N 3-[dimethoxy(methyl)silyl]propan-1-amine Chemical compound CO[Si](C)(OC)CCCN ZYAASQNKCWTPKI-UHFFFAOYSA-N 0.000 claims description 2
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- TZZGHGKTHXIOMN-UHFFFAOYSA-N 3-trimethoxysilyl-n-(3-trimethoxysilylpropyl)propan-1-amine Chemical compound CO[Si](OC)(OC)CCCNCCC[Si](OC)(OC)OC TZZGHGKTHXIOMN-UHFFFAOYSA-N 0.000 claims description 2
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 claims description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 2
- CXRFDZFCGOPDTD-UHFFFAOYSA-M Cetrimide Chemical compound [Br-].CCCCCCCCCCCCCC[N+](C)(C)C CXRFDZFCGOPDTD-UHFFFAOYSA-M 0.000 claims description 2
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 2
- REYJJPSVUYRZGE-UHFFFAOYSA-N Octadecylamine Chemical compound CCCCCCCCCCCCCCCCCCN REYJJPSVUYRZGE-UHFFFAOYSA-N 0.000 claims description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 2
- 229920001213 Polysorbate 20 Polymers 0.000 claims description 2
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- VBIIFPGSPJYLRR-UHFFFAOYSA-M Stearyltrimethylammonium chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)C VBIIFPGSPJYLRR-UHFFFAOYSA-M 0.000 claims description 2
- HVUMOYIDDBPOLL-XGKPLOKHSA-N [2-[(2r,3r,4s)-3,4-dihydroxyoxolan-2-yl]-2-hydroxyethyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XGKPLOKHSA-N 0.000 claims description 2
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- XJWSAJYUBXQQDR-UHFFFAOYSA-M dodecyltrimethylammonium bromide Chemical compound [Br-].CCCCCCCCCCCC[N+](C)(C)C XJWSAJYUBXQQDR-UHFFFAOYSA-M 0.000 claims description 2
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- CEYYIKYYFSTQRU-UHFFFAOYSA-M trimethyl(tetradecyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCC[N+](C)(C)C CEYYIKYYFSTQRU-UHFFFAOYSA-M 0.000 claims description 2
- RRHXZLALVWBDKH-UHFFFAOYSA-M trimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azanium;chloride Chemical compound [Cl-].CC(=C)C(=O)OCC[N+](C)(C)C RRHXZLALVWBDKH-UHFFFAOYSA-M 0.000 claims description 2
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/14—Monomers containing only one unsaturated aliphatic radical containing one ring substituted by heteroatoms or groups containing heteroatoms
- C08F212/30—Sulfur
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/24—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen halogen-containing groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
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Abstract
The invention provides a high-temperature-resistant fast drilling agent, a preparation method thereof and application thereof in water-based drilling fluid. The fast drilling agent comprises the following raw materials in parts by mass: 4 to 5 portions of component A, 2 to 3 portions of component B, 2 to 3 portions of white oil and 0.5 to 1 portion of surfactant; wherein the component A comprises the following raw materials in parts by mass: 3 to 5 portions of sulfonic acid monomer, 3 to 5 portions of carboxyl monomer, 1 to 2 portions of ester monomer, 0.5 to 1 portion of organic quaternary ammonium salt monomer, 50 to 70 portions of water, 3 to 5 portions of isopropanol, 6 to 10 portions of hydrophilic emulsifier, 6 to 10 portions of lipophilic emulsifier and 0.1 to 0.3 portion of initiator; the component B comprises the following raw materials in parts by mass: 1 part of fluorine-containing compound, 2 to 3 parts of silane material, 0.5 to 1 part of triethylamine and 0.005 to 0.02 part of catalyst. The fast drilling agent provided by the invention can obviously improve the lubricating property of the drilling fluid, inhibit rock hydration expansion and coalescence, obviously improve the drilling speed, and has excellent temperature resistance.
Description
Technical Field
The invention relates to a high-temperature-resistant fast drilling agent, a preparation method thereof and application thereof in water-based drilling fluid, belonging to the technical field of petroleum drilling fluid.
Background
In the drilling process of petroleum exploration and development, the problem of slow drilling speed of a large-size well bore and deep stratum high-density drilling fluid well section is a technical problem to be solved urgently in deep well drilling in China. The drilling speed is improved, the drilling footage is improved, the tripping time is reduced, and the economic benefit of the drilling work can be obviously improved. The problem of how to improve the drilling speed is an important technical obstacle for improving the drilling success rate of deep wells and ultra-deep wells, shortening the well construction period of deep wells and improving the economic benefit in China. The problem of drilling speed increase is always the key point of domestic and foreign research, but no effective mature technology exists.
The factors influencing the drilling speed are multiple and complex, the drilling speed is a complex function influenced by a plurality of system variables and environment variables, the environment variables are limited in operation, but the purpose of improving the mechanical drilling speed can be achieved by controlling the system variables, and the system variables comprise: drill bit type, reasonable drilling tool combination, mechanical and hydraulic factors of the drill bit, and the performance of the drilling fluid, so there are generally 3 approaches to increasing the drilling speed at present: firstly, a novel rapid drilling fluid technology is developed; secondly, designing a high-efficiency drill bit and optimizing a drilling tool structure; and thirdly, applying a drilling optimization technology. At present, PDC drill bits, lion tiger beast drill bits and the like have appeared in the research on efficient rock breaking drill bits, but the drill bits are expensive in research and manufacturing cost and have larger difficulty in further promotion, and a larger research space still exists for improving the mechanical drilling speed by optimizing the performance of drilling fluid. The research developed in the aspect of improving the drilling speed of the drilling fluid in China comprises drilling fluid systems such as synthetic base drilling fluid, oil-base-like drilling fluid, strong inhibition and polyalcohol drilling fluid and the like, which all have good effects. However, these drilling fluids have limited application due to their high cost and environmental pollution, and it is still important to increase the drilling speed of water-based drilling fluids. Practice proves that the density, solid content, filtration loss, rheological property, lubricity, adhesiveness and the like of the drilling fluid have obvious influence on the drilling speed of the machine. Changing the properties of the drilling fluid, such as lowering the viscosity and friction resistance, can make the drilling rate of water-based drilling fluids marginally reach the level of oil-based drilling fluids.
In order to improve the drilling speed of the water-based drilling fluid, the lubricity of the drilling fluid is improved, the adsorption of solid-phase particles to a drilling tool in the drilling process is reduced, the hydration expansion and the dispersion migration of rocks are inhibited, the cleanness of a drill bit and a well bottom is ensured, and meanwhile, the drilling fluid of the deep well and the ultra-deep well is required to have good temperature resistance. Chinese patent document CN107474805A provides an accelerating agent suitable for drilling fluid, which comprises: the sulfonated polyglycerol long-chain fatty acid ester in the accelerating agent mainly plays a role in lubricating, but has low lubricity, poor temperature resistance and is easy to decompose and lose effect in an alkaline environment. Chinese patent document CN102260487A provides a drilling fluid fast drilling agent, which is a viscous liquid containing animal oil, propyltrimethylammonium chloride, oleic acid, ethylene glycol, chlorinated paraffin, machine oil, triethanolamine, and chlorinated stearic acid. However, the fast drilling agent is viscous liquid to paste, has poor dispersion performance in water-based drilling fluid, cannot play a good role, and contains animal oil, so that the fast drilling agent is more prone to deterioration and failure in a high-temperature environment; secondly, the hydration inhibition effect on shale is insufficient, and the adsorbability on the surfaces of rocks and drilling tools is poor, resulting in insufficient lubricity and inhibition.
At present, the problems of slow mechanical drilling speed and difficult speed increase of water-based drilling fluid exist in the drilling process of deep wells and ultra-deep wells, so that a high-temperature-resistant quick drilling agent which has small influence on the rheological property of the drilling fluid, can remarkably improve the lubricating property of the drilling fluid, inhibits the hydration expansion and coalescence of clay and can effectively improve the drilling speed is developed, and the high-temperature-resistant quick drilling agent has a good application prospect.
Disclosure of Invention
Aiming at the defects of the prior art, in particular to the problem that the mechanical drilling speed is slow and the speed is difficult to increase in the drilling process of a deep well and an ultra-deep well by the existing water-based drilling fluid, the invention provides a high-temperature-resistant fast drilling agent, a preparation method thereof and application thereof in the water-based drilling fluid. The fast drilling agent can obviously improve the lubricating property of drilling fluid, inhibit rock hydration expansion and coalescence, obviously improve the drilling speed and has excellent temperature resistance.
The technical scheme of the invention is as follows:
the high-temperature-resistant fast drilling agent comprises the following raw materials in parts by mass: 4 to 5 portions of component A, 2 to 3 portions of component B, 2 to 3 portions of white oil and 0.5 to 1 portion of surfactant;
the component A comprises the following raw materials in parts by mass: 3 to 5 portions of sulfonic acid monomer, 3 to 5 portions of carboxyl monomer, 1 to 2 portions of ester monomer, 0.5 to 1 portion of organic quaternary ammonium salt monomer, 50 to 70 portions of deionized water, 3 to 5 portions of isopropanol, 6 to 10 portions of hydrophilic emulsifier, 6 to 10 portions of lipophilic emulsifier and 0.1 to 0.3 portion of initiator;
the component B comprises the following raw materials in parts by mass: 1 part of fluorine-containing compound, 2 to 3 parts of silane material, 0.5 to 1 part of triethylamine and 0.005 to 0.02 part of catalyst.
According to the invention, the white oil is a common commercial white oil; preferably, the white oil is 3# white oil, 5# white oil, 7# white oil or 10# white oil, and more preferably 3# white oil.
According to the invention, the surfactant is a combination of a cationic surfactant and a nonionic surfactant, wherein the mass ratio of the cationic surfactant to the nonionic surfactant is 1;
further preferably, the cationic surfactant is one or a composition of more than two of dodecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide and octadecyl trimethyl ammonium bromide, and is preferably dodecyl trimethyl ammonium chloride; the nonionic surfactant is one or more of dodecyl phenol polyoxyethylene ether (OP-10), lauroyl diethanol amide (LDEA), polyoxyethylene octadecyl amine (CAS number 26635-92-7) and cocoamine polyoxyethylene ether, preferably dodecyl phenol polyoxyethylene ether (OP-10).
According to the invention, the preferable sulfonic acid monomer is sodium p-styrene sulfonate, sodium allyl sulfonate or 2-acrylamido-2-methyl propane sulfonic acid, and is preferably sodium p-styrene sulfonate.
Preferably, according to the present invention, the carboxyl monomer is acrylic acid or maleic anhydride.
According to the invention, the ester monomer is preferably one or a combination of more than two of dimethylaminoethyl acrylate, vinyl acetate and dimethylaminoethyl methacrylate.
According to the invention, the organic quaternary ammonium salt monomer is preferably one or a combination of more than two of methacryloyloxyethyl trimethyl ammonium chloride (DMC), 3-methacryloyloxyaminopropyl trimethyl ammonium chloride (DMAC), acryloyloxyethyl trimethyl ammonium chloride (DAC) and dimethyl diallyl ammonium chloride (DMDAAC).
According to a preferred embodiment of the present invention, the hydrophilic emulsifier is Tween80, tween60 or Tween20; the lipophilic emulsifier is Span80 or Span60.
Preferably according to the invention, the initiator is ammonium persulfate, potassium persulfate, dibenzoyl peroxide or tert-butyl hydroperoxide.
According to the invention, the component A is prepared according to the following method:
(1) Adding a sulfonic acid monomer, a carboxyl monomer and an organic quaternary ammonium salt monomer into deionized water, adjusting the pH of the system to be 6-9, adding a hydrophilic emulsifier, and stirring to dissolve the hydrophilic emulsifier to obtain a water phase;
(2) Mixing an ester monomer and isopropanol, adding a lipophilic emulsifier, and uniformly mixing to obtain an organic phase;
(3) Mixing the water phase in the step (1) and the organic phase in the step (2), shearing to obtain a mixed solution, and then adding an initiator in a nitrogen environment to react; after the reaction is completed, the component A is obtained.
Preferably, when the carboxyl monomer in step (1) is maleic anhydride, it is dissolved by stirring at 50 ℃.
Preferably, the pH of the system is adjusted by using an alkali solution in the step (1); the mass fraction of the alkali solution is 20-30%, and the alkali is NaOH or KOH.
Preferably, the shearing in the step (3) is shearing for 20-30 min under the condition of 1500-2000 r/min by using a shearing machine.
Preferably, the initiator in the step (3) is added into the system in the form of an initiator aqueous solution, and the mass fraction of the initiator aqueous solution is 30-50%.
Preferably, the reaction temperature in the step (3) is 70-80 ℃; the reaction time is 4 to 6 hours.
Preferably according to the invention, the fluorine-containing compound is perfluorooctylsulfonyl fluoride or trifluoropropylmethylcyclotrisiloxane.
According to the invention, the silane material is preferably one or the combination of more than two of gamma-aminopropyl trimethoxy silane (KH 540), gamma-aminopropyl triethoxy silane (KH 550), bis (3-trimethoxysilylpropyl) amine, 3-aminopropyl methyl dimethoxy silane and gamma-glycidoxypropyl trimethoxy silane (KH 560).
Preferably according to the invention, the catalyst is KOH, naOH or LiOH.
According to the invention, the component B is preferably prepared according to the following method: mixing a fluorine-containing compound, a silane material and triethylamine, heating to a reaction temperature, adding a catalyst, and then carrying out a heat preservation reaction; after the reaction is completed, a transparent viscous liquid is obtained, namely the component B.
Preferably, the reaction temperature is 120-140 ℃; the reaction time is 4-6 h.
According to the invention, the preparation method of the high-temperature-resistant quick drilling agent comprises the following steps:
mixing the component A, the component B, white oil and a surfactant, and uniformly stirring to obtain a high-temperature-resistant quick drilling agent; the stirring speed is 3000-4000 r/min, and the stirring time is 1-2 h.
The high-temperature-resistant fast drilling agent is a uniformly dispersed slightly viscous liquid.
According to the invention, the high-temperature resistant fast drilling agent is applied to water-based drilling fluid; preferably, the addition amount of the high-temperature resistant fast drilling agent in the water-based drilling fluid is 10-30 g/L.
The invention has the following technical characteristics and beneficial effects:
1. the fast drilling agent of the invention consists of a component A, a component B, white oil and a surfactant in a specific proportion. The component A contains an organic quaternary ammonium salt cationic monomer, a sulfonic acid group, a carboxyl group and the like, has a good adsorption inhibition effect on clay, changes the wettability of the clay surface, and simultaneously contains an ester group and has certain lubricity; the component B can adsorb steel to change the surface wettability of the steel and has a certain wetting reversal effect on rocks, and the component A and the component B in a specific ratio change the friction type and strengthen the lubricating effect by changing the wettability of the rocks and the steel surface, so that the drilling rate is effectively reduced; meanwhile, a specific amount of white oil is added into the drilling fluid, the white oil mainly plays a role in auxiliary lubrication, and the white oil is added into the drilling fluid to form emulsion in the drilling fluid under the synergistic effect of the white oil and the surfactant, so that the temperature resistance of the system can be remarkably improved; the addition of the specific surfactant has a certain inhibiting effect while being in synergistic action with white oil, is beneficial to the thermodynamic stability of the fast drilling agent, the dispersion in water-based drilling fluid and the formation of emulsion to improve the temperature resistance of a system, and has certain lubricity, so that the wetting reversal can be realized, the friction type between contact surfaces can be changed, and the lubricating effect can be improved.
2. The fast drilling agent has good lubricating property, can reduce torque, and mainly has the main effects of improving the lubricating property, improving the lubricating property of the drilling fluid and reducing the adhesion of the drilling fluid so as to reduce the torque because the component A and the component B change the surface properties of rocks and drilling tools and change the friction type, and the component A contains esters and the white oil which play a main role in improving the lubricating property.
3. The cationic ammonium surfactant in the fast drilling agent and the organic quaternary ammonium salt contained in the component A have good inhibition effect, can effectively inhibit hydration expansion of rocks, and can prevent solid-phase particles in drilling fluid from coalescing and adsorbing.
4. The fast drilling agent component A is preferentially adsorbed on the surface of rock through electrostatic interaction and hydrogen bond interaction, so that the wettability is changed; the component B has a wetting reversal effect on metal and rock, so that the contact surface is changed, and the lubricating property is enhanced. Therefore, the fast drilling agent can be effectively adsorbed on the surfaces of metal drilling tools and stratum rocks, has excellent wetting reversal effect, changes the surface properties of the drilling tools and the rock fragments, enhances the lubricity, and plays a role in preventing bit balling and improving the mechanical drilling speed.
5. The components in the fast drilling agent have good temperature resistance, so the fast drilling agent has good temperature resistance, good compatibility with conventional drilling fluid, small influence on the rheological property of the drilling fluid and certain fluid loss reduction effect.
6. The component A and the component B in the fast drilling agent change the wettability of the rock surface, so that water in the drilling fluid can more easily permeate into rock gaps under the action of pressure, the hydration of the rock is inhibited, the fast permeation is realized, the strength of the rock is reduced, and a drill bit can conveniently break the rock; the quick penetration effect is achieved, the quick penetration into rock microcracks can be realized, and the quick rock breaking of a drill bit is facilitated; the pressure holding effect can be effectively reduced, rock debris can be returned in time, and the well bottom can be kept clean, so that the drilling speed can be increased.
7. The white oil can obviously enhance the temperature resistance (forming stable emulsion) and lubricity of the quick drilling agent, plays a certain role in dilution in the preparation process of the quick drilling agent, and prevents the quick drilling agent from being too viscous and inconvenient to use; the surfactant is an essential component for forming the emulsion, plays an important role in maintaining the thermodynamic stability of the fast drilling agent, can promote the dispersion of the white oil in the drilling fluid, and can play a good role only by maintaining the uniformity of a system. The components in the fast drilling agent in a specific ratio act synergistically, so that the fast drilling agent can remarkably improve the lubricating property of the drilling fluid, inhibit rock hydration expansion and coalescence, and has excellent temperature resistance; compared with the drilling fluid without the fast drilling agent and the drilling fluid added with other common fast drilling agents, the drilling fluid added with the fast drilling agent can obviously improve the drilling speed, and the performance of the fast drilling agent can be reduced when the proportion of each component is too high or too low.
Detailed Description
The present invention is further illustrated by, but not limited to, the following examples.
Meanwhile, the experimental methods described in the following examples are all conventional methods unless otherwise specified; the reagents, materials and equipment are commercially available, unless otherwise specified.
The white oil used in the examples was # 3 white oil.
Example 1
A preparation method of a high-temperature resistant fast drilling agent comprises the following steps:
1. preparation of component A:
(1) Adding 5g of sodium p-styrene sulfonate, 3g of acrylic acid and 1g of dimethyl diallyl ammonium chloride into 70g of deionized water, adjusting the pH of the system to 7 by using a 20% NaOH aqueous solution, adding 8g of Tween80, and stirring by using a magnetic stirrer to fully dissolve the Tween80 to obtain a water phase;
(2) Adding 2g of vinyl acetate and 4g of isopropanol into a beaker, adding 8g of Span80, and fully stirring by using a magnetic stirrer to obtain an organic phase;
(3) Mixing the aqueous phase in the step (1) and the organic phase in the step (2), shearing the mixture for 30 minutes at 2000r/min by using a shearing machine, and then transferring the mixture to a reaction device;
(4) Adding 0.3g of initiator ammonium persulfate into water to prepare an initiator solution with the mass fraction of 50%, adding the initiator solution into a reaction device in a nitrogen environment, and reacting for 4 hours at the temperature of 75 ℃ at the stirring speed of 300r/min in the reaction process; after the reaction is finished, naturally cooling to room temperature to obtain the component A.
2. Preparation of component B:
adding 10g of perfluorooctyl sulfonyl fluoride, 20g of gamma-aminopropyltriethoxysilane (KH 550) and 5g of triethylamine into a four-neck flask, and under the heating condition of an oil bath, starting condensation and refluxing while continuously stirring; adding 0.06g KOH when the temperature reaches 120 ℃, reacting for 6h at 120 ℃ to obtain transparent viscous liquid, and naturally cooling to room temperature to obtain the component B.
3. Preparing a fast drilling agent:
adding 10g of the component A, 6g of the component B, 6g of white oil, 1g of dodecyl trimethyl ammonium chloride and 1g of dodecyl phenol polyoxyethylene ether (OP-10) into a high-speed stirring container, and stirring at 3000r/min for 1h at a high speed in a high-speed stirrer to fully mix the components to form uniformly dispersed slightly viscous liquid, namely the high-temperature resistant fast drilling agent.
Example 2
A preparation method of a high-temperature resistant fast drilling agent comprises the following steps:
1. preparation of component A:
(1) Adding 5g of sodium p-styrene sulfonate, 3g of maleic anhydride and 1g of dimethyl diallyl ammonium chloride into 70g of deionized water, adjusting the pH of the system to 7 by using a NaOH aqueous solution with the mass fraction of 20%, adding 8g of Tween80, stirring by using a magnetic stirrer, and heating in a water-proof manner at 50 ℃ to fully dissolve the Tween80 to obtain a water phase;
(2) Adding 2g of dimethylaminoethyl acrylate and 4g of isopropanol into a beaker, adding 8g of Span80, and fully stirring by using a magnetic stirrer to obtain an organic phase;
(3) Mixing the aqueous phase in the step (1) and the organic phase in the step (2), shearing the mixture for 30 minutes at 2000r/min by using a shearing machine, and then transferring the mixture to a reaction device;
(4) Adding 0.3g of initiator ammonium persulfate into water to prepare an initiator solution with the mass fraction of 50%, adding the initiator solution into a reaction device in a nitrogen environment, and reacting for 4 hours at the temperature of 80 ℃, wherein the stirring speed is 300r/min in the reaction process; after the reaction is finished, naturally cooling to room temperature to obtain the component A.
2. Preparation of component B:
adding 10g of trifluoropropylmethyl cyclotrisiloxane, 20g of gamma-aminopropyltriethoxysilane (KH 550) and 5g of triethylamine into a four-neck flask, starting condensation and reflux under the heating condition of an oil bath, and continuously stirring; adding 0.06g KOH when the temperature reaches 120 ℃, reacting for 6h at 120 ℃ to obtain transparent viscous liquid, and naturally cooling to room temperature to obtain the component B.
3. Preparing a fast drilling agent:
adding 10g of the component A, 6g of the component B, 6g of white oil, 1g of dodecyl trimethyl ammonium chloride and 1g of dodecyl phenol polyoxyethylene ether (OP-10) into a high-speed stirring container, and stirring at 3000r/min for 1h at a high speed in a high-speed stirrer to fully mix the components to form uniformly dispersed slightly viscous liquid, namely the high-temperature resistant fast drilling agent.
Example 3
A preparation method of a high-temperature resistant fast drilling agent comprises the following steps:
1. preparation of component A:
(1) Adding 5g of sodium p-styrene sulfonate, 3g of acrylic acid and 1g of dimethyl diallyl ammonium chloride into 70g of deionized water, adjusting the pH of the system to 7 by using a 20% NaOH aqueous solution, adding 8g of Tween80, and stirring by using a magnetic stirrer to fully dissolve the Tween80 to obtain a water phase;
(2) Adding 2g of dimethylaminoethyl acrylate and 4g of isopropanol into a beaker, adding 8g of Span80, and fully stirring by using a magnetic stirrer to obtain an organic phase;
(3) Mixing the aqueous phase in the step (1) and the organic phase in the step (2), shearing the mixture for 30 minutes at 2000r/min by using a shearing machine, and then transferring the mixture to a reaction device;
(4) Adding 0.3g of initiator ammonium persulfate into water to prepare an initiator solution with the mass fraction of 50%, adding the initiator solution into a reaction device in a nitrogen environment, and reacting for 4 hours at the temperature of 75 ℃ with the stirring speed of 300r/min in the reaction process; after the reaction is finished, naturally cooling to room temperature to obtain the component A.
2. Preparation of component B:
adding 10g of trifluoropropylmethylcyclotrisiloxane, 20g of gamma-aminopropyltriethoxysilane (KH 550) and 5g of triethylamine into a four-neck flask, starting condensation and reflux under the heating condition of an oil bath, and continuously stirring; adding 0.06g of KOH when the temperature reaches 120 ℃, reacting for 6 hours at 120 ℃ to obtain transparent viscous liquid, and naturally cooling to room temperature to obtain the component B.
3. Preparing a fast drilling agent:
adding 10g of the component A, 6g of the component B, 6g of white oil, 1g of dodecyl trimethyl ammonium chloride and 1g of dodecyl phenol polyoxyethylene ether (OP-10) into a high-speed stirring container, and stirring at a high speed of 3000r/min for 1h in a high-speed stirrer to fully mix the components to form uniformly dispersed slightly viscous liquid, namely the high-temperature resistant fast drilling agent.
Comparative example 1
A high temperature resistant fast drilling agent was prepared as described in example 1, except that: component A was not added.
The preparation method comprises the following steps:
1. component B was prepared as in example 1.
2. Preparing a fast drilling agent:
adding 6g of the component B, 6g of white oil, 1g of dodecyl trimethyl ammonium chloride and 1g of dodecyl phenol polyoxyethylene ether (OP-10) into a high-speed stirring container, and stirring for 1h at a high speed of 3000r/min on a high-speed stirrer to fully mix the components to form uniformly dispersed slightly viscous liquid, thus obtaining the high-temperature resistant fast drilling agent.
Comparative example 2
A high temperature resistant fast drilling agent was prepared as described in example 2, except that: component B was not added.
The preparation method comprises the following steps:
1. component a was prepared as in example 2;
2. preparing a fast drilling agent: adding 10g of the component A, 6g of white oil, 1g of dodecyl trimethyl ammonium chloride and 1g of dodecyl phenol polyoxyethylene ether (OP-10) into a high-speed stirring container, and stirring for 1h at a high speed of 3000r/min on a high-speed stirrer to fully mix the components to form uniformly dispersed slightly viscous liquid, namely the high-temperature resistant fast drilling agent.
Comparative example 3
A high temperature resistant fast drilling agent was prepared as described in example 1, except that: no white oil was added.
The preparation method comprises the following steps:
1. component a was prepared as in example 1;
2. component B was prepared as in example 1;
3. preparing a fast drilling agent: adding 10g of the component A, 6g of the component B, 1g of dodecyl trimethyl ammonium chloride and 1g of dodecyl phenol polyoxyethylene ether (OP-10) into a high-speed stirring container, and stirring for 1h at a high speed of 3000r/min on a high-speed stirrer to fully mix the components to form uniformly dispersed slightly viscous liquid, namely the high-temperature resistant fast drilling agent.
Comparative example 4
A high temperature resistant flash drilling agent was prepared as described in example 2, except that: no surfactant was added.
The preparation method comprises the following steps:
1. component a was prepared as in example 2;
2. component B was prepared as in example 2;
2. preparing a fast drilling agent: adding 10g of the component A, 6g of the component B and 6g of white oil into a high-speed stirring container, and stirring at 3000r/min for 1h on a high-speed stirrer to fully mix the components to obtain a slightly viscous liquid, namely the high-temperature-resistant quick drilling agent.
Comparative example 5
The drilling fluid fast drilling agent accelerating agent is a similar product, and a commercial drilling fluid fast drilling agent Q-DRILL-1 is selected for a comparison experiment.
Test examples
The fast drilling agents prepared in examples and comparative examples were evaluated as follows:
1. contact Angle determination
Distilled water is used for preparing a fast drilling agent solution with the mass fraction of 2%. Several core sheets with the thickness of 6mm are prepared by using a core cutter, the surface is polished to be flat, and several N80 steel sheets are prepared. Soaking the core slice and the steel slice in the fast drilling agent solution for 24h, taking out and drying for 4h at the temperature of 105 +/-2 ℃. Approximately 5. Mu.L of distilled water was dropped on the core piece and the steel sheet using an optical contact angle measuring instrument using a microsyringe, and after standing for 5min, the contact angles of the distilled water on the core piece and the steel sheet were measured, and the contact angles of the untreated core piece and the steel sheet were measured as a comparison. The experimental temperature was room temperature. The contact angle measurement results are shown in table 1.
TABLE 1 contact Angle measurement results
| Sample (I) | Contact angle/° of steel sheet | Core plate contact angle/° |
| Untreated with | 56.3 | 12.5 |
| 2% example 1 | 137.5 | 112.6 |
| 2% example 2 | 136.3 | 111.8 |
| 2% example 3 | 135.4 | 111.6 |
| 2% comparative example 1 | 122.7 | 93.2 |
| 2% comparative example 2 | 118.8 | 102.5 |
| 2% comparative example 3 | 117.5 | 107.6 |
| 2% comparative example 4 | 115.6 | 105.4 |
| 2% comparative example 5 | 120.5 | 98.4 |
It can be seen from table 1 that the contact angle changes significantly after the steel sheet and the core piece are soaked in the sample, and the wettability of distilled water with the steel sheet and the core piece is reversed from hydrophilicity. The contact angle of the sample of the embodiment is larger than that of the comparative example, and the wetting reversal effect is more obvious. The absence of component a in comparative example 1, resulting in a significantly lower contact angle of the core tablet with water than the examples, illustrates that component a has a promoting effect on the wet reversal of the rock. Comparative example 2, in which component B was not added, resulted in a steel sheet having a significantly smaller contact angle with water than the examples, shows that component B has a promoting effect on the wet reversion of the steel sheet. In comparative example 3, the contact angle of the steel sheet and the core piece with water is obviously reduced due to no addition of the white oil, but the influence on the steel sheet is larger, which shows that the white oil has a promoting effect on the wetting reversion of the steel sheet, and the core piece has amphipathy, so the contact angle of the core piece with water is less influenced due to no addition of the white oil. In comparative example 4, no surfactant is added, so that the layering phenomenon of the fast drilling agent solution is easily caused, the adsorption effect of fast drilling agent components on the surfaces of the rock core and the steel sheet is influenced, and the contact angle measurement result is far smaller than that of the sample in the example. Commercial comparative example 5 has similar effects to those of comparative examples 1 and 2. The comparative examples have good working results compared to untreated steel and core plates. The contact angle measurement result shows that the sample of the embodiment can change the surface properties of a steel sheet (simulation drilling tool) and a core plate (stratum rock), so that the friction between hydrophilic surfaces of the original drilling tool and drilling cuttings is changed into the friction between the hydrophilic surfaces, the lubricating effect of the drilling fluid is improved, the friction coefficient between a well wall and the drilling tool is reduced, and the torque is reduced; meanwhile, the friction coefficient between the drill bit and the drilling cuttings is reduced, so that the drilling efficiency of the drill bit is improved, and the drilling speed is favorably improved.
2. Effect of fast drilling agents on drilling fluid rheology and fluid loss
Preparing base slurry: at room temperature, 400mL of water was added to a high stirring cup, and 4% (16.0 g) of bentonite and 0.2% (0.8 g) of Na were slowly added with stirring 2 CO 3 . Stirring for 20min on a high-speed stirrer (the stirring speed is 8000 r/min), and sealing and maintaining at normal temperature of 25 + -3 deg.C for 24 h.
Preparing a drilling fluid sample: and (3) taking 400mL of base slurry, respectively adding 8g of sample, and stirring for 20min under the condition of 3000 r/min.
Aging treatment of drilling fluid: and (3) aging the drilling fluid sample by using a roller heating furnace, wherein the treatment temperature is 180 ℃, and the treatment time is 16h.
And (3) testing the performance after aging: after aging, the mixture was stirred at 3000r/min for 20minThe American Petroleum Institute (API) standard (API RP 13B-1, 2009) tests the rheological parameters (apparent viscosity, plastic viscosity) and API fluid loss of formulated drilling fluids. The fluid loss V at 7.5min and 15min was recorded during the API fluid loss measurements 7.5 And V 15 And calculating the initial filtration loss of the drilling fluid according to the following formula.
Apparent Viscosity (AV) =0.5 x phi 600 (1)
Plastic Viscosity (PV) = phi 600-phi 300 (2)
In formula (3), V 7.5 The filtrate loss at 7.5min, mL; v 15 The fluid loss at 15min, mL; c is the slope of the straight line; vsp is the initial fluid loss, mL.
Drilling fluid rheology and fluid loss results are shown in table 2.
TABLE 2 Effect of fast drilling agents on drilling fluid Performance
It can be seen from table 2 that the viscosity of the drilling fluid is slightly increased after the samples of examples and comparative examples are added into the base slurry and aged at 180 ℃, and the rheological property of the base slurry is not greatly influenced, but the fluid loss is remarkably reduced, which indicates that neither the samples of examples nor comparative examples have adverse effects on the drilling fluid. The initial fluid loss of the base slurry was 0, and the API fluid loss was large. After the samples of the examples are added, the initial fluid loss of the drilling fluid is obviously increased and is about 1.5mL, but the API fluid loss is obviously reduced. After the comparative sample is added, the initial filtration loss of the drilling fluid is slightly increased, and the API filtration loss is obviously reduced compared with that of the base slurry at about 0.4 mL. Comparative examples 3 and 4 failed to form a certain emulsion structure when added to the base slurry, resulting in insufficient temperature resistance, lower viscosity after aging, and greater fluid loss. In conclusion, the fast drilling agent sample prepared in the embodiment has a good promotion effect when added into the base slurry, and the drilling fluid has a certain initial filtration loss, which indicates that the drilling fluid has good permeability. If the drilling fluid filtrate has good permeability, the drilling fluid filtrate can quickly permeate into the rock microcracks at the bottom of the well at the moment that the drill bit breaks the rock, so that the pressure holding effect is reduced or lowered, and the drilling cuttings at the bottom of the well can be returned out in time; in addition, the drilling fluid filtrate can quickly permeate into the stratum, so that the rock strength can be reduced to a certain extent, and the drill bit can break rock, thereby improving the drilling rate. In contrast, the samples of the examples had greater initial fluid loss and better permeability.
3. Effect of fast drilling agents on drilling fluid lubricity and adhesion coefficient
After the drilling fluid in experiment 2 is aged, the drilling fluid is cooled to room temperature, and the reduction rate of the lubricating coefficient and the adhesion coefficient of the drilling fluid are measured. According to Q/SY17088-2016 technical Specification of liquid lubricant for drilling fluid, an EP-B type extreme pressure lubrication instrument is adopted to test the extreme pressure lubrication coefficient. The operation steps are as follows: first, the lubricator was checked with distilled water and the torque readings of distilled water were tested to ensure that the torque readings of distilled water were between 32-38. And (4) replacing the distilled water with the drilling fluid to be tested, and reading the torque reading of the drilling fluid to be tested. The machine was checked with distilled water before each torque test. The lubrication coefficient decrease rate η is calculated according to the following formula.
In the formula (4), η -lubrication coefficient decrease rate,%;
-extreme pressure lubrication coefficient of the base paste;
extreme pressure lubrication coefficient of the drilling fluid.
According to Q/SY17088-2016 technical Specification of liquid lubricant for drilling fluid, a JK type stuck freeing fluid analyzer is adopted to determine the adhesion coefficient. The test conditions are that the pressure difference is 3.5MPa, the filtration loss time is 30min, and the adhesion coefficients of 5min,10min,30min and 45min are respectively read and calculated after the adhesion disc is adhered to the mud cake. The adhesion coefficient decrease rate K was calculated as follows.
In formula (5): the rate of decrease of K-adhesion coefficient,%; mu.s 0 -an adhesion coefficient of the base pulp of 45 min; mu.s 1 Adhesion coefficient of drilling fluid sample for 45 min.
Drilling fluid lubricity measurements are shown in table 3.
TABLE 3 drilling fluid lubricity test results
| Sample (I) | Reduction ratio of lubricity coefficient (%) | Decrease ratio of adhesion coefficient (%) |
| Base pulp | -- | -- |
| Base stock +2% example 1 | 93.2 | 68.5 |
| Base stock +2% example 2 | 91.7 | 67.3 |
| Base stock +2% example 3 | 92.5 | 68.5 |
| Base stock +2% comparative example 1 | 88.6 | 65.3 |
| Base stock +2% comparative example 2 | 85.3 | 61.7 |
| Base stock +2% comparative example 3 | 84.5 | 62.5 |
| Base stock +2% comparative example 4 | 85.2 | 61.5 |
| Base stock +2% comparative example 5 | 87.4 | 63.8 |
It can be seen from table 3 that the samples of the examples still have excellent lubricating performance after being added into the base slurry and aged at 180 ℃, the reduction rate of the lubricating coefficient is kept above 90%, and the reduction rate of the adhesion coefficient is kept above 67%. The comparative example 1 does not contain the component A, the lubricity is reduced, and the extreme pressure lubrication performance is reduced, which shows that the component A has a certain influence on improving the extreme pressure lubrication performance of the drilling fluid, but the reduction rate of the lubrication coefficient is still over 85 percent, the reduction rate of the adhesion coefficient is over 65 percent, and shows that the component A has a small influence on the lubrication performance of a sample. The comparative example 2 does not contain the component B, so that the lubricating property is obviously reduced, and the component B has a larger influence on the lubricating property of a sample, but still maintains the better lubricating property of the drilling fluid. Comparative examples 1 and 2 have comparable lubricity to the commercial sample, comparative example 5. Comparative example 3 has no white oil, resulting in a decrease in temperature resistance thereof, and the rapid drilling agent is decomposed at high temperature, resulting in a significant decrease in lubricity. In the comparative example 4, the surfactant is not added, so that the drilling fluid is layered after high-temperature aging, oil stains on the surface float, the influence on the measurement result of the extreme pressure lubrication coefficient reduction rate is relatively small, but the mud cake is increased in adhesion coefficient, reduced in adhesion coefficient reduction rate and reduced in lubricity. But the example samples all had more excellent lubricating properties. After the lubricating property of the drilling fluid is improved, the torque of broken rocks can be reduced, and the friction between a drilling tool and a well wall and between a drill bit and rock debris is reduced; the adhesion between drill cuttings and the drill bit and between the drilling tool and the well wall is reduced, the probability of mud pockets of the drill bit and the drilling tool can be effectively reduced, the ineffective grinding of the drill bit is reduced, the well bottom cleaning is facilitated, and the drilling efficiency of the drill bit is improved.
4. Rock debris rolling recovery experiment
Weighing 20g of rock debris with 6-10 meshes, putting the rock debris into an aging tank containing 400mL of drilling fluid (the preparation of the drilling fluid is the same as that of the fast drilling agent in experiment 2 in the influence on the rheological property and the filtration loss of the drilling fluid), rolling for 16h at an aging temperature of 180 ℃, and taking out after cooling. And pouring the rock sample in the tank into a 40-mesh sieve, cleaning the rock sample in water, drying the rest rock sample in the sieve at 105 ℃ for 4 hours, and weighing the mass of the rock sample. The recovery was calculated as follows.
R＝M/20×100％(6)
In the formula (6), R-recovery rate,%; dry weight of rock sample after M-40 mesh sieve, g.
The results of the rock debris rolling recovery are shown in Table 4.
TABLE 4 rock debris Rolling recovery
As can be seen from Table 4, the samples of the fast drilling agent all have higher rock debris rolling recovery rate, and the recovery rate all exceeds 80 percent. And the rock debris recovery rate of the sample of the embodiment is more than 85 percent, which is better than that of the sample of the comparative example, and the rock debris recovery rate of the sample of the comparative example is not greatly different. The rock debris recovery rates of the comparative examples 1,2, 3 and 4 are almost the same, which shows that the components have promotion effects on improving the rock debris recovery rate. The high recovery rate of the rock debris indicates that the drilling fluid has stronger inhibition, the fast drilling agent inhibits the hydration expansion of the rock by being adsorbed on the surface of the rock, on one hand, the fast drilling agent is beneficial to cutting and crushing the rock at the bottom of a well by a drill bit, on the other hand, the drilling fluid is beneficial to carrying the crushed rock debris to the ground in time and removing the rock debris by using solid control equipment, so that the stability of the performance of the drilling fluid is maintained, the repeated crushing of the drill cuttings is prevented, the cleanness of the bottom of the well is kept, the generation of mud bags is reduced, the rock breaking efficiency of the drill bit is improved, and the mechanical drilling speed is improved.
5. Adhesion coalescence experiment
A plurality of N80 steel pipes are prepared, cleaned by ethanol solution, placed in a drying oven at 105 ℃, dried for 4 hours, cooled and weighed for later use. A drilling fluid sample is prepared according to the method in the experiment 2 and poured into an aging tank, and 20g of 6-10-mesh rock debris and a steel pipe weighed correspondingly are added into the aging tank. After aging for 16h at 180 ℃, taking out the steel tube, drying and weighing to obtain the weight of the adhered solid phase. The results of the adhesion coalescence experiments are shown in table 5.
Table 5 results of adhesion coalescence experiments
| Sample (I) | Adhesion weight/g |
| Base pulp | 14.72 |
| Base stock +2% example 1 | 6.85 |
| Base stock +2% example 2 | 7.52 |
| Base stock +2% example 3 | 7.33 |
| Base stock +2% comparative example 1 | 8.25 |
| Base stock +2% comparative example 2 | 8.81 |
| Base stock +2% comparative example 3 | 9.05 |
| Base stock +2% comparative example 4 | 8.76 |
| Base stock +2% comparative example 5 | 10.36 |
The adhesion coalescence experiment shown in the table 5 can more intuitively show that the solid phase in the drilling fluid is easily adsorbed on the surface of steel, and compared with the base slurry, the embodiment reduces the number of cuttings carried and adhered by the steel by about half; comparative examples 1,2, 3 and 4 also have significant effects and are superior to the commercial fast drilling agent comparative example 5. The adsorption of solid phase on the steel surface is analogous to the adhesion of broken rock debris on the surface of the drilling tool during drilling. The quick drilling agent reduces the adsorption of rock debris on the surface of the drilling tool by changing the wettability of the drilling tool and the surface of the rock debris; the adhesion performance of the drill cuttings is reduced by improving the lubricity of the drilling fluid and inhibiting the hydration expansion of rocks. The drill cuttings are not easy to adhere to the surface of the steel of the drilling tool, so that the mud bag condition is reduced, the rock debris is favorable for timely flowback and removal, and the drill cuttings and the rock debris jointly act to improve the drilling efficiency of the drill bit and the mechanical drilling speed.
The high-temperature-resistant quick drilling agent researched and developed by the invention has a good effect by combining the experimental results, and the mechanical drilling speed can be obviously improved. The fast drilling agent has excellent temperature resistance, good compatibility with drilling fluid and small influence on the rheological property of the drilling fluid. The fast drilling agent can be effectively adsorbed on the surfaces of a metal drilling tool and formation rock, has an excellent wetting reversal effect, changes the surface properties of the drilling tool and rock debris, converts the friction between the drilling tool and a hydrophilic surface of drilling cuttings into the friction between lipophilic surfaces, reduces the friction coefficient, reduces the torque and improves the lubricating effect of the drilling fluid; meanwhile, the drilling fluid has a good inhibition effect, can effectively inhibit hydration expansion of rocks, prevents solid-phase particles in the drilling fluid from being bonded and adsorbed on the surface of a drilling tool, and plays roles in preventing bit balling, reducing ineffective grinding and improving the mechanical drilling speed; the drilling fluid also has a quick penetration effect, can quickly penetrate into rock microcracks, is beneficial to quick rock breaking of a drill bit, can effectively reduce the pressure holding effect, is beneficial to timely flowback of rock debris, keeps the well bottom clean, and obviously improves the mechanical drilling speed under the combined action of multiple aspects.
Claims (10)
1. The high-temperature-resistant fast drilling agent is characterized by comprising the following raw materials in parts by mass: 4 to 5 portions of component A, 2 to 3 portions of component B, 2 to 3 portions of white oil and 0.5 to 1 portion of surfactant;
the component A comprises the following raw materials in parts by mass: 3 to 5 portions of sulfonic acid monomer, 3 to 5 portions of carboxyl monomer, 1 to 2 portions of ester monomer, 0.5 to 1 portion of organic quaternary ammonium salt monomer, 50 to 70 portions of water, 3 to 5 portions of isopropanol, 6 to 10 portions of hydrophilic emulsifier, 6 to 10 portions of lipophilic emulsifier and 0.1 to 0.3 portion of initiator;
the component B comprises the following raw materials in parts by mass: 1 part of fluorine-containing compound, 2 to 3 parts of silane material, 0.5 to 1 part of triethylamine and 0.005 to 0.02 part of catalyst.
2. The high-temperature-resistant quick drilling agent according to claim 1, wherein the white oil can be 3# white oil, 5# white oil, 7# white oil or 10# white oil, and is preferably 3# white oil;
the surfactant is a combination of a cationic surfactant and a nonionic surfactant, wherein the mass ratio of the cationic surfactant to the nonionic surfactant is 1.
3. The high-temperature-resistant fast drilling agent according to claim 2, wherein the cationic surfactant is one or a combination of more than two of dodecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide and octadecyl trimethyl ammonium bromide, and is preferably dodecyl trimethyl ammonium chloride; the nonionic surfactant is one or a combination of more than two of dodecyl phenol polyoxyethylene ether, lauroyl diethanol amine, polyoxyethylene octadecyl amine and cocoamine polyoxyethylene ether, and is preferably dodecyl phenol polyoxyethylene ether.
4. The high-temperature-resistant fast drilling agent according to claim 1, wherein the sulfonic acid monomer is sodium p-styrene sulfonate, sodium allyl sulfonate or 2-acrylamido-2-methyl propane sulfonic acid, preferably sodium p-styrene sulfonate; the carboxyl monomer is acrylic acid or maleic anhydride; the ester monomer is one or the combination of more than two of dimethylaminoethyl acrylate, vinyl acetate and dimethylaminoethyl methacrylate; the organic quaternary ammonium salt monomer is one or the combination of more than two of methacryloyloxyethyl trimethyl ammonium chloride, 3-methacryloyloxyaminopropyl trimethyl ammonium chloride, acryloyloxyethyl trimethyl ammonium chloride and dimethyl diallyl ammonium chloride;
the hydrophilic emulsifier is Tween80, tween60 or Tween20; the lipophilic emulsifier is Span80 or Span60; the initiator is ammonium persulfate, potassium persulfate, dibenzoyl peroxide or tert-butyl hydroperoxide.
5. The high-temperature-resistant fast drilling agent according to claim 1, wherein the component A is prepared by the following method:
(1) Adding a sulfonic acid monomer, a carboxyl monomer and an organic quaternary ammonium salt monomer into water, adjusting the pH of the system to be 6-9, adding a hydrophilic emulsifier, and stirring to dissolve the hydrophilic emulsifier to obtain a water phase;
(2) Mixing an ester monomer and isopropanol, adding a lipophilic emulsifier, and uniformly mixing to obtain an organic phase;
(3) Mixing the water phase in the step (1) and the organic phase in the step (2), shearing to obtain a mixed solution, and then adding an initiator in a nitrogen environment to react; after the reaction is finished, the component A is obtained.
6. The high temperature resistant fast drilling agent according to claim 5, wherein in the case that the carboxyl monomer is maleic anhydride in the step (1), the carboxyl monomer is dissolved by stirring at 50 ℃;
in the step (1), alkaline solution is used for adjusting the pH value of the system; the mass fraction of the alkali solution is 20-30%, and the alkali is NaOH or KOH;
in the step (3), shearing is carried out for 20-30 min under the condition of 1500-2000 r/min by using a shearing machine;
in the step (3), the initiator is added into the system in the form of initiator aqueous solution, and the mass fraction of the initiator aqueous solution is 30-50%;
the reaction temperature in the step (3) is 70-80 ℃; the reaction time is 4 to 6 hours.
7. The high temperature resistant fast drilling agent according to claim 1, wherein the fluorine-containing compound is perfluorooctylsulfonyl fluoride or trifluoropropylmethylcyclotrisiloxane;
the silane material is one or the combination of more than two of gamma-aminopropyl trimethoxy silane, gamma-aminopropyl triethoxy silane, bis (3-trimethoxysilylpropyl) amine, 3-aminopropyl methyl dimethoxy silane and gamma-glycidoxypropyl trimethoxy silane;
the catalyst is KOH, naOH or LiOH.
8. The high-temperature-resistant fast drilling agent according to claim 1, wherein the component B is prepared by the following method: mixing a fluorine-containing compound, a silane material and triethylamine, heating to a reaction temperature, adding a catalyst, and then carrying out a heat preservation reaction; obtaining transparent viscous liquid after the reaction is finished, namely a component B;
preferably, the reaction temperature is 120-140 ℃; the reaction time is 4-6 h.
9. A method for preparing the high temperature resistant fast drilling agent of any one of claims 1 to 8, comprising the steps of:
mixing the component A, the component B, the white oil and the surfactant, and uniformly stirring to obtain the high-temperature-resistant fast drilling agent; the stirring speed is 3000-4000 r/min, and the stirring time is 1-2 h.
10. The use of the high temperature resistant fast drilling agent of any one of claims 1 to 8 in a water-based drilling fluid, wherein the addition amount of the high temperature resistant fast drilling agent in the water-based drilling fluid is 10 to 30g/L.
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