CN111484833B - Low-friction film-forming plugging agent for high-temperature oil-based drilling fluid and preparation method and application thereof - Google Patents
Low-friction film-forming plugging agent for high-temperature oil-based drilling fluid and preparation method and application thereof Download PDFInfo
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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
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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
- C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
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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
- C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
- C09K8/36—Water-in-oil emulsions
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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
- C09K8/56—Compositions for consolidating loose sand or the like around wells without excessively decreasing the permeability thereof
- C09K8/565—Oil-based compositions
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/10—Nanoparticle-containing well treatment fluids
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/28—Friction or drag reducing additives
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
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- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The invention provides a low-friction film-forming plugging agent for high-temperature oil-based drilling fluid, and a preparation method and application thereof. The preparation method comprises the step of uniformly mixing 20-40 parts by weight of silicon emulsion, 10-20 parts by weight of fluorine emulsion, 9-11 parts by weight of nano solid material, 6-8 parts by weight of film forming aid, 2-4 parts by weight of high temperature resistant modified micro powder, 3-5 parts by weight of high temperature resistant emulsified asphalt and deionized water serving as a solvent to obtain the low-friction film forming plugging agent for the high temperature oil-based drilling fluid. The blocking agent can comprise the blocking agent prepared by the preparation method. The application includes the application in the preparation of water-in-oil emulsions or oil-based drilling fluids. The beneficial effects of the invention can include: the preparation method is simple and convenient and has low cost; the plugging agent can reduce the underground friction resistance, has small influence on the rheological property of a drilling fluid system, can meet the requirement of a low-friction-resistance well of an ultrahigh-temperature deep well, and can reach the use temperature of 200 ℃.
Description
Technical Field
The invention relates to the technical field of oil-based drilling fluids, in particular to a low-friction film-forming plugging agent for a high-temperature oil-based drilling fluid, and a preparation method and application thereof.
Background
Compared with a vertical well, the long horizontal section horizontal well can expose the reservoir to the maximum extent, and has obvious technical advantages in heavy oil and gas reservoirs, low-porosity and low-permeability oil and gas reservoirs, thin layer oil and gas reservoirs, vertical fractured oil and gas reservoirs and side-top water-gas cap oil and gas reservoirs. With the acceleration of the shale gas exploration and development process in China, a long horizontal section horizontal well (2500-3000 m) becomes the main development direction of shale gas. In recent years, a large number of horizontal wells with the horizontal section length of 1500-2000 m are deployed in a shale gas demonstration base of the Changning-Wignen country in China, most of the horizontal wells are large-offset three-dimensional horizontal wells, and the problems of complex well track, variable shale production layer inclination angle and the like exist. Along with the horizontal segment extension, the detritus bed piles up continuously seriously in the drilling process, gets into middle and later stage, and the tubular column lifts to descend and slips and creeps into the in-process friction and moment of torsion and constantly increases, leads to the speed of penetration low, meets in the pit and hinders, the sticking of the brill frequently. And the shale stratum is microcracked, stratigraphically developed, has the characteristics of brittleness, high collapse pressure and the like, is easy to collapse in the drilling process, and is required to improve the plugging effect of the drilling fluid and slow down the pressure fluctuation and pressure transmission in the well. Therefore, in a horizontal well with a long horizontal section, a good plugging effect, a low friction effect and a strong sand carrying capacity become key technologies of drilling fluid. At present, the Changning-Weiyuan shale gas demonstration base has successfully built a trillion-reserve and trillion-yield large gas area in the middle and shallow layer (the buried depth is less than 3500 m), and has little work in the deep layer (the buried depth is 3500-4500 m). With the acceleration of the exploration and development process of the shale gas, the development horizon gradually marches to the deep part.
In recent years, with the development of a water-based drilling fluid film forming technology, a water-based drilling fluid film forming technology mainly comprising a semipermeable membrane, an oil film, a surfactant film and the like is formed, the technology does not cause pollution to a reservoir stratum and tool blockage, a continuous film can be formed on a mud cake, mud, filtrate, oil, water and other liquids are controlled to enter a stratum from a source, excessive solid particle materials are not needed in a system, and the influence on mud rheology is small. However, this technique has less application in oil-based drilling fluids.
At present, a film forming plugging theory and a film forming plugging agent are mainly applied to water-based drilling fluid, and the application of an oil-based drilling fluid is less. The film formed by the common styrene film-forming plugging agent in the water-based drilling fluid has poor temperature resistance, the film is easy to crack when the use temperature in the drilling fluid is more than 150 ℃, the medium adsorption is reduced, and the plugging effective rate is greatly reduced. The synergistic effect of a film forming auxiliary agent, a film forming connecting agent and a film forming reaction agent is needed in the process of forming a film in the oil-based drilling fluid, and the formed continuous film also has the problem of weak water repellency, so that the plugging requirement of the deep well oil-based drilling fluid at the high temperature of 200 ℃ cannot be met.
Disclosure of Invention
In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, one of the objects of the present invention is to provide a low friction film-forming plugging agent for high temperature oil-based drilling fluid, and a preparation method and application thereof, so as to reduce downhole friction.
In order to achieve the aim, the invention provides a preparation method of a low-friction film-forming plugging agent for a high-temperature oil-based drilling fluid.
The preparation method can comprise the following steps: according to the weight parts, 20-40 parts of silicon emulsion, 10-20 parts of fluorine emulsion, 9-11 parts of nano solid material, 6-8 parts of film forming additive, 2-4 parts of high temperature resistant modified micro powder, 3-5 parts of high temperature resistant emulsified asphalt and deionized water are uniformly mixed to obtain the low-friction film forming plugging agent for the high temperature oil-based drilling fluid.
The invention also provides a low-friction film-forming plugging agent for the high-temperature oil-based drilling fluid. The plugging agent can comprise the plugging agent prepared by the preparation method of the low-friction film-forming plugging agent for the high-temperature oil-based drilling fluid.
The invention further provides application of the amphiphobic nanoscale blocking agent for the oil-based drilling fluid, wherein the application comprises application of the amphiphobic nanoscale blocking agent added in a water-in-oil emulsion or in preparation of the oil-based drilling fluid.
Compared with the prior art, the beneficial effects of the invention can include: the preparation method is simple and convenient and has low cost; the plugging agent can reduce the underground friction resistance, has small influence on the rheological property of a drilling fluid system, can meet the requirement of a low-friction-resistance well of an ultrahigh-temperature deep well, and can reach the use temperature of 200 ℃.
Detailed Description
Hereinafter, the low-friction film-forming plugging agent for high-temperature oil-based drilling fluid (which may be simply referred to as plugging agent or film-forming agent) and the preparation method and application thereof according to the present invention will be described in detail with reference to the exemplary embodiments.
The invention provides a preparation method of a low-friction film-forming plugging agent for high-temperature oil-based drilling fluid.
In one exemplary embodiment of the present invention, the preparation method may include:
the preparation method can comprise the following steps: according to the weight parts, 20-40 parts of silicon emulsion, 10-20 parts of fluorine emulsion, 9-11 parts of nano solid material, 6-8 parts of film forming additive, 2-4 parts of high temperature resistant modified micro powder, 3-5 parts of high temperature resistant emulsified asphalt and deionized water are uniformly mixed to obtain the low-friction film forming plugging agent for the high temperature oil-based drilling fluid.
The deionized water is used as a solvent or a carrier, and the addition amount thereof may be 5 to 100 parts by weight, further 10 to 80 parts by weight, and further 12 to 50 parts by weight.
In another exemplary embodiment of the present invention, the preparation method may include:
(1) the weight ratio of the raw materials is as follows:
the balance being deionized water.
(2) The preparation method comprises the following steps:
according to the proportion requirement, uniformly mixing silicon emulsion, fluorine emulsion, nano solid material, film forming additive, high temperature resistant modified micro powder and high temperature resistant emulsified asphalt.
In the two exemplary embodiments of the present invention, the silicone-based emulsion is a core-shell styrene-acrylic emulsion modified by using styrene as a hard monomer, acrylates as a soft monomer, and an organosilicon monomer, an epoxy monomer, a double-bond unsaturated acid monomer, and a double-bond unsaturated hydroxyl monomer, wherein the total content of the organosilicon monomer (i.e., an organosilicon modifying group) may be 6 to 8%, the total content of the epoxy monomer (i.e., an epoxy modifying group) may be 6 to 8%, the total content of the double-bond unsaturated acid monomer (a double-bond unsaturated acid modifying group) may be 10 to 20%, and the total content of the double-bond unsaturated hydroxyl monomer (a double-bond unsaturated hydroxyl modifying group) may be 1 to 2%. In the silicon emulsion, the content of the latex particles can be 30-60%, and the average particle size can be 80-500 nm.
In other words, the silicone emulsion uses styrene as a hard monomer and acrylates as a soft monomer. The silicone-based emulsion may include: the core-shell styrene-acrylic emulsion contains an organic silicon modified group, an epoxy modified group, a double-bond unsaturated acid modified group and a double-bond unsaturated hydroxyl modified group. In the silicon emulsion, the mass ratio of the organic silicon modified groups can be 6-8%, the mass ratio of the epoxy modified groups can be 6-8%, the mass ratio of the double-bond unsaturated acid modified groups can be 10-20%, and the mass ratio of the double-bond unsaturated hydroxyl modified groups can be 1-2%.
In the two exemplary embodiments of the present invention, the fluorine-based emulsion is a copolymerized styrene-acrylic emulsion in which styrene is used as a hard monomer, acrylates are used as a soft monomer, and an organic fluorine monomer, an epoxy monomer, a double-bond unsaturated acid monomer, and a double-bond unsaturated hydroxyl monomer are modified together, wherein in the fluorine-based emulsion, the total amount of the organic fluorine monomer (i.e., the organic fluorine modifying group) accounts for 6-8%, the total amount of the epoxy monomer (i.e., the epoxy modifying group) accounts for 2-3%, the total amount of the double-bond unsaturated acid monomer (i.e., the double-bond unsaturated acid modifying group) accounts for 10-20%, and the total amount of the double-bond unsaturated hydroxyl monomer (i.e., the double-bond unsaturated hydroxyl modifying group) accounts for 1-2%. Wherein, the content of the latex particles in the fluorine emulsion can be 30-60%, and the average particle size can be 80-500 nm.
In other words, the fluorine emulsion uses styrene as a hard monomer and acrylic esters as a soft monomer. The fluorine-based emulsion may include: contains an organic fluorine modified group, an epoxy modified group, a double-bond unsaturated acid modified group and a double-bond unsaturated hydroxyl modified group. In the fluorine emulsion, the mass ratio of the organic fluorine modified groups can be 6-8%, the mass ratio of the epoxy modified groups is 2-3%, the mass ratio of the double-bond unsaturated acid modified groups is 10-20%, and the mass ratio of the double-bond unsaturated hydroxyl modified groups is 1-2%.
In the above two exemplary embodiments of the present invention, the nano-based solid particles may include nano-silica, nano-graphite, and nano-polytetrafluoroethylene, for example, a mixture of the three. Wherein the mass ratio of the nano silicon dioxide to the nano graphite to the nano polytetrafluoroethylene can be 1-2: 3-4: 5 to 7. The size of the nano solid particles can be 50-300 nm, such as 150 +/-70 nm.
In both of the above exemplary embodiments of the present invention, the coalescent may include a decaglycol ester.
In this embodiment, the high temperature resistant modified micropowder can be a surface modified polytetrafluoroethylene micropowder and an ultrafine molybdenum oxide, such as a mixture thereof. Wherein the mass ratio of the superfine molybdenum oxide to the surface modified polytetrafluoroethylene micro powder can be 1-2: 1 to 2. The size of the high-temperature-resistant modified micro powder can be 50-3000 nm; wherein, the superfine molybdenum oxide particle size can be 50-2000 nm, such as 1000 + -500 nm, and the polytetrafluoroethylene differential particle size can be 300-3000 nm, such as 1500 + -700 nm.
The invention uses organosilicon modified emulsion (namely silicon emulsion) containing a large amount of epoxy groups as a carrier of epoxy groups (the epoxy groups are embedded in the inner shell) to be compounded with an organic fluorine modified copolymerization styrene-acrylic emulsion (namely fluorine emulsion) product, can meet the film forming requirement under the condition of not using sodium alginate, improves the temperature resistance of the film, does not expose a large amount of epoxy groups, and has small influence on the rheological property.
According to the invention, the organosilicon modified styrene-acrylic emulsion (namely, the silicon emulsion) is introduced into the film forming agent, so that the water repellency and the crosslinking density of the composite film can be increased. The invention introduces the core-shell emulsion (namely the silicon emulsion), and can reduce the influence of the emulsion on the rheological property of the system. The fluorine is introduced, the requirement of the ultra-high temperature deep well low-friction well can be met, and the use temperature can reach 200 ℃. The invention adopts shell-core organosilicon and copolymerized organic fluorine, and has low cost.
The invention can achieve the purpose of reducing the system friction resistance by introducing materials such as organic fluorine modified emulsion, nano polytetrafluoroethylene, polytetrafluoroethylene micro powder, nano molybdenum oxide, nano graphite and the like.
The invention introduces high temperature resistant emulsified asphalt, which can relatively reduce the dosage of emulsion substances, reduce the dosage of plugging agents and enhance the bonding and cementing effect of plugging. Wherein the temperature resistance of the high-temperature resistant emulsified asphalt can be more than or equal to 200 ℃.
The two latex particles of the invention both contain a large amount of double-bond unsaturated acid modified groups, double-bond unsaturated hydroxyl modified groups and a certain amount of epoxy modified groups in the molecular structure design, thereby ensuring the medium adsorbability and the crosslinking property after the film formation of the colloidal particles. By compounding with the high-temperature-resistant emulsified asphalt, the effect of enhancing the crosslinking density is achieved, and the softening plugging density, the plugging strength and the toughness of the film are further enhanced.
The invention also provides a low-friction film-forming plugging agent for the high-temperature oil-based drilling fluid. The blocking agent can comprise the blocking agent prepared by the method.
The film forming agent of the invention can form a film within 30min at the use temperature of 200 ℃, and the pressure-bearing plugging capability after film forming can be reached2.5 MPa. The reduction rate of the extreme pressure lubrication coefficient of the oil-based drilling fluid added with the plugging agent can reach 22-325%. 1.7-2.0 g/cm after the plugging agent is added 3 The extreme pressure lubrication coefficient of the oil-based drilling fluid system can be reduced by 15-38 percent, such as 1.8g/cm 3 The extreme pressure lubrication coefficient of the oil-based drilling fluid system can be reduced to 0.08-0.10 from 0.12.
In still another aspect, the invention provides an application of the amphiphobic nanoscale plugging agent for the oil-based drilling fluid, wherein the application comprises the application of the amphiphobic nanoscale plugging agent added in a water-in-oil emulsion or the oil-based drilling fluid.
When in application, the mass-volume ratio of the plugging agent to the water-in-oil emulsion can be 4-10%: 1g/mL, for example, 0.04 to 0.1g, of the blocking agent may be added to 1mL of the water-in-oil emulsion. The mass volume ratio of the plugging agent to the oil-based drilling fluid can be 2-4%: 1g/mL, for example 0.02-0.04 g, of plugging agent can be added to 1mL of oil-based drilling fluid.
After the blocking agent is added into the water-in-oil emulsion according to the mass volume ratio of 4-10% g/mL, the filtration loss can be 16-35 mL, the permeation loss oil can be 8-13 mL, and the permeation loss can be 9-23 mL in the film forming process at 200 ℃ and 0.7 MPa.
The plugging agent is added into the oil-based drilling fluid according to the mass-to-volume ratio of 2-4%, the HTHP filtration loss can be reduced to 4.0mL, the formed filter cake has the permeability of 10-35 mL under 3.5MPa, the permeability of 9.5-105 mL of oil, the extreme pressure lubrication coefficient can be reduced by 22-38%, and the dynamic settling stability coefficient can be improved by 190-130%.
The use may also include use in the preparation of a water-in-oil emulsion or in the preparation of an oil-based drilling fluid.
In order that the above-described exemplary embodiments of the invention may be better understood, further description thereof with reference to specific examples is provided below.
Example 1
The formula comprises the following components in percentage by mass: 40% of silicon emulsion, 10% of fluorine emulsion, 1% of nano silicon dioxide, 3% of nano graphite, 5% of nano polytetrafluoroethylene, 7% of glycol decate, 1% of surface modified polytetrafluoroethylene micro powder, 1% of superfine molybdenum oxide, 3% of high-temperature resistant emulsified asphalt and the balance of deionized water. And uniformly mixing the raw materials according to the proportion requirement in the formula to obtain the plugging agent.
The silicon emulsion is core-shell styrene-acrylic emulsion which is modified by taking styrene as a hard monomer, acrylic esters as a soft monomer and an organic silicon monomer, an epoxy monomer, a double-bond unsaturated acid monomer and a double-bond unsaturated hydroxyl monomer. Wherein, the organosilicon monomer, the double-bond unsaturated acid monomer and the modified styrene-acrylic are taken as shells, and the epoxy monomer and the double-bond unsaturated hydroxyl monomer modified styrene-acrylic are taken as cores. 6 percent of organosilicon monomer, 8 percent of epoxy monomer, 13 percent of double-bond unsaturated acid monomer and 2 percent of double-bond unsaturated hydroxyl monomer.
The fluorine emulsion is a copolymerization styrene-acrylic emulsion which takes styrene as a hard monomer, acrylic esters as a soft monomer and is modified by organic fluorine monomer, epoxy monomer, double-bond unsaturated acid monomer and double-bond unsaturated hydroxyl monomer together. Wherein, the content of the organic fluorine monomer is 8 percent, the content of the epoxy monomer is 2 percent, the content of the double-bond unsaturated acid monomer is 10 percent, and the content of the double-bond unsaturated hydroxyl monomer is 2 percent.
Example 2
The formula comprises the following components in percentage by mass: 30% of silicon emulsion, 20% of fluorine emulsion, 1% of nano silicon dioxide, 3% of nano graphite, 6% of nano polytetrafluoroethylene, 8% of glycol decate, 2% of surface modified polytetrafluoroethylene micro powder, 2% of superfine molybdenum oxide, 4% of high-temperature-resistant emulsified asphalt and the balance of deionized water. And uniformly mixing the raw materials according to the proportion requirement in the formula to obtain the plugging agent.
The silicon emulsion is core-shell styrene-acrylic emulsion which is modified by taking styrene as a hard monomer, acrylic esters as a soft monomer and an organic silicon monomer, an epoxy monomer, a double-bond unsaturated acid monomer and a double-bond unsaturated hydroxyl monomer. Wherein, the organosilicon monomer and the double-bond unsaturated acid monomer modified styrene-acrylic ester are taken as shells, and the epoxy monomer and the double-bond unsaturated hydroxyl monomer modified styrene-acrylic ester are taken as cores. 6 percent of organosilicon monomer, 6 percent of epoxy monomer, 15 percent of double-bond unsaturated acid monomer and 1 percent of double-bond unsaturated hydroxyl monomer.
The fluorine emulsion is a copolymerization styrene-acrylic emulsion which takes styrene as a hard monomer, acrylic esters as a soft monomer and is modified by organic fluorine monomer, epoxy monomer, double-bond unsaturated acid monomer and double-bond unsaturated hydroxyl monomer together. Wherein, the content of the organic fluorine monomer is 6 percent, the content of the epoxy monomer is 3 percent, the content of the double-bond unsaturated acid monomer is 20 percent, and the content of the double-bond unsaturated hydroxyl monomer is 1 percent.
Example 3
The formula comprises the following components in parts by weight: 20 parts of silicon emulsion, 20 parts of fluorine emulsion, 1 part of nano silicon dioxide, 3 parts of nano graphite, 7 parts of nano polytetrafluoroethylene, 6 parts of glycol decate, 1 part of surface modified polytetrafluoroethylene micro powder, 2 parts of superfine molybdenum oxide, 5 parts of high-temperature resistant emulsified asphalt and 35 parts of deionized water. And uniformly mixing the raw materials according to the proportion requirement in the formula to obtain the plugging agent.
The silicon emulsion is core-shell styrene-acrylic emulsion which is modified by taking styrene as a hard monomer, acrylic esters as a soft monomer and an organic silicon monomer, an epoxy monomer, a double-bond unsaturated acid monomer and a double-bond unsaturated hydroxyl monomer. Wherein, the organosilicon monomer and the double-bond unsaturated acid monomer modified styrene-acrylic ester are taken as shells, and the epoxy monomer and the double-bond unsaturated hydroxyl monomer modified styrene-acrylic ester are taken as cores. 8% of organosilicon monomer, 6% of epoxy monomer, 20% of double-bond unsaturated acid monomer and 2% of double-bond unsaturated hydroxyl monomer.
The fluorine-containing emulsion is a copolymerization styrene-acrylic emulsion which takes styrene as a hard monomer, acrylic esters as a soft monomer and is modified by an organic fluorine monomer, an epoxy monomer, a double-bond unsaturated acid monomer and a double-bond unsaturated hydroxyl monomer together. Wherein, the content of the organic fluorine monomer is 6 percent, the content of the epoxy monomer is 2 percent, the content of the unsaturated bond acid monomer is 15 percent, and the content of the unsaturated double bond hydroxyl monomer is 2 percent.
The blocking agents prepared in examples 1 to 3 were subjected to performance evaluation.
First, apparent viscosity measurement of plugging agent under normal temperature and normal pressure
The apparent viscosity of the plugging agent is measured by a Brookfiled viscometer, a rotor is 04#, the rotating speed is 100rpm, and the measuring conditions are normal temperature and normal pressure.
TABLE 1 apparent viscosity of the plugging agent at Normal temperature and pressure
| Examples of the invention | Example 1 | Example 2 | Example 3 |
| Apparent viscosity/mPa.s | 198.6 | 201.3 | 199.5 |
The apparent viscosity of the blocking agent can be 199.5-201.3 mPa.s at normal temperature and normal pressure.
Second, performance evaluation after adding water-in-oil emulsion
The blocking agents corresponding to examples 1-3 were added to and mixed with the water-in-oil emulsion, respectively, to prepare the blocking agent. The formula of the water-in-oil emulsion comprises: 240mL of white oil, 2.1g of primary emulsifier, 8.4g of co-emulsifier, 4.5g of wetting agent and 60mL of 25% CaCl 2 And (3) weighing the materials according to the formula requirement of the saline water, and stirring for 60min at 10000-12000 rpm.
1. Evaluation of emulsion dispersibility and apparent viscosity
Respectively placing the water-in-oil emulsion and the prepared water-in-oil emulsion into a roller furnace at 200 ℃ for hot rolling for 16h, cooling, opening the roller furnace, stirring for 30min, standing for 1h at normal temperature and normal pressure, observing dispersibility, and observing whether layering, precipitation and precipitation exist. And measuring the apparent viscosity before and after thermal dispersion by a Brookfiled viscometer, wherein a rotor is selected as No. 02, the rotating speed is 100rpm, and the measuring conditions are normal temperature and normal pressure.
TABLE 2200 deg.C thermal dispersion for 16h, emulsion standing for 1h, and dispersibility
As can be seen from Table 2, the apparent viscosities before and after hot rolling after adding the blocking agent were 9-89% and 13-107% higher than those of the emulsion blank samples. After the film forming agent is added into the emulsion, the change rate of the apparent viscosity of the system before and after hot rolling is 2.7-7.9%, which shows that the film forming agent has good thermal stability in the water-in-oil emulsion and does not generate high-temperature degradation phenomenon.
The water-in-oil emulsions + 4% blocking agent (example 1) in tables 2-4 are shown: an emulsion was prepared by mixing the blocking agent corresponding to example 1 with a water-in-oil emulsion, wherein "4%" means that the mass to volume ratio of the corresponding blocking agent to water-in-oil emulsion was 0.04 g/mL. Other similar representations in tables 2-4 have similar meanings.
2. Filtration loss, permeation loss and oil loss under the conditions of film forming temperature and film forming pressure
Respectively placing the water-in-oil emulsion and the prepared water-in-oil emulsion into a roller furnace at 200 ℃ for hot rolling for 16h, cooling and opening the roller furnace, stirring for 30min, preparing a continuous film of the water-in-oil emulsion by using a FANN No.206056 filter paper through a GGS71-B type high-temperature high-pressure water loss instrument under the conditions of 200 ℃ and 0.7MPa, and recording the filtration loss for 30 min; after filling medium water into the kettle body of the water loss instrument, filling the filter paper and the continuous film into the water loss instrument again, performing a water permeability test at 200 ℃ and under the pressure of 0.7MPa, and recording the water permeability for 30 min; the process of the oil permeability test is the same as the oil permeability test, the test medium is white oil, and the oil permeability loss amount is recorded for 30 min. The filtration loss of the water-in-oil emulsion in the film forming process at 200 ℃ and under the pressure of 0.7MPa is 16.8-35 mL; 8.2-12.4 mL of continuous film oil and 9.6-22.2 mL of water are permeated under the action of 200 ℃ and 0.7 MPa.
Table 3200 deg.C, 0.7MPa high temperature medium pressure filtration loss, permeation loss, and permeation loss oil
3. Pressure bearing capacity test of film under high temperature and high pressure
Continuous films (i.e., water-in-oil emulsion type continuous films) corresponding to examples 1 to 3 were obtained according to the method in "2" above.
The method comprises the steps of testing the pressure-bearing plugging capacity of the water-in-oil emulsion type continuous film in different media under the conditions of 200 ℃ and 0.5-3.0 MPa pressure through a GGS71-B type high-temperature high-pressure water loss instrument, reading the filtration loss after each pressure value is stabilized for 5min, and then pressurizing to the next pressure value for carrying out an experiment, wherein the experiment result is the accumulated filtration loss. According to the experimental result, the highest pressure-bearing capacity of the pressure-bearing plugging agent reaches 2.5MPa at the temperature of 200 ℃.
TABLE 4 evaluation of pressure-bearing Capacity of emulsion continuous film
As can be seen from Table 4, under the condition that the medium is oil, the maximum pressure-bearing capacity can be 2.5MPa, and the accumulated filtration loss can reach 27.8-48.8 mL; under the condition that the medium is water, the maximum pressure-bearing capacity can be 2.5MPa, and the accumulated filtration loss can reach 28.8-38 mL.
Thirdly, evaluating rheological property, high-temperature high-pressure filtration loss and lubricity before and after adding the oil-based drilling fluid
The oil-based drilling fluid comprises the following components in percentage by weight: 240mL of white oil, 2.1g of main emulsifier, 9g of auxiliary emulsifier, 6.0g of wetting agent, 60mL of water, 12g of organic soil, 24g of asphalts, 12g of CaO and barite (the density is adjusted to 1.80 g/cm) 3 )
Sample formulations were made according to the formulation in table 5, according to GBT 16783.2-2012 oil and gas industry drilling fluid field test part 2: oil-based drilling fluid measures rheological property, demulsification voltage and filtration loss, and the measurement results are shown in table 5; after heat dispersion at 200 ℃ for 16 hours, high temperature and high pressure filtration loss (HTHP) and oil permeation evaluation were carried out at 200 ℃ and 3.5MPa by a GGS42 type high temperature and high pressure water loss instrument, and oil permeation evaluation was carried out on a cake using white oil as a filter medium, and the evaluation results are shown in Table 6.
TABLE 5 rheology and HTHP test data before and after addition of film-forming agent to oil-based drilling fluids
Wherein G 'is initial cut, G' is final cut, AV is apparent viscosity, PV is plastic viscosity, YP is dynamic shear force, ES is demulsification voltage, and HTHP is high-temperature high-pressure filtration loss.
According to the table 5, the film forming agent disclosed by the invention is added into the oil-based drilling fluid, and the influence on the rheological property of the oil-based drilling fluid is controllable, wherein phi 6 is increased from 6 to 12, phi 3 is increased from 5 to 11, the initial shear is increased from 2.5 to 3-4, the final shear is increased from 9.5 to 10.5-17.5, the apparent viscosity increase rate is 8.8-24.6%, the plastic viscosity increase rate is 10.2-26.5%, the dynamic shear force increase rate is 0-25%, the influence on emulsion breaking voltage is small, the high-temperature and high-pressure filtration loss can be effectively reduced, and the HTHP reduction rate is 30.6-64.5%.
TABLE 6 evaluation of oil-based drilling fluids at 200 deg.C and 3.5MPa for oil and water permeability before and after addition of film-forming agent
According to the comparative data in the table 6, the oil-based drilling fluid mud cake added with the plugging agent has better water and oil permeability, wherein the filter cake has 10.4-34.8 mL of water and 9.8-10.4 mL of oil permeability within 30min at 200 ℃ and 3.5 MPa.
2. Effect on lubricity of oil-based drilling fluids
The lubricity of the system before and after the oil-based drilling fluid is added with the plugging agent is compared and evaluated by adopting an extreme pressure lubricator, and the evaluation result is shown in table 7.
TABLE 7 evaluation of lubricity
| Experimental sample | Extreme pressure lubrication coefficient |
| Oil-based drilling fluid | 0.12 |
| Oil-based drilling fluid + 2% plugging agent (example 1) | 0.093 |
| Oil-based drilling fluid + 3% plugging agent (example 1) | 0.081 |
| Oil-based drilling fluid + 4% plugging agent (example 1) | 0.075 |
| Oil-based drilling fluid + 2% plugging agent (example 2) | 0.097 |
| Oil-based drilling fluid + 2% plugging agent (example 3) | 0.081 |
According to the table 7, with the increase of the addition of the plugging agent, the extreme pressure lubrication coefficient of the oil-based drilling fluid system can be reduced from 0.12 to 0.093-0.075, which shows that the plugging agent can effectively reduce the friction coefficient of the drilling fluid system and improve the lubricating capability of the drilling fluid.
Tables 5-7 for oil-based drilling fluids + 1% plugging agent (example 1): a solution was formulated from the plugging agent and oil-based drilling fluid corresponding to example 1, where "1%" indicates a mass to volume ratio of the respective plugging agent to oil-based drilling fluid of 0.01 g/mL. Other similar representations in tables 5-7 have similar meanings.
3. Influence on dynamic settling stability of oil-based drilling fluid
The experimental samples were prepared according to the recipe in table 8 to obtain samples, which were hot rolled in a roller oven at 200 ℃ for 16h and then removed and stirred for 30 min. And (3) measuring the dynamic settling stability of the system before and after the plugging agent is added by adopting VSST settling shoes, a six-speed rotational viscometer and a 10mL needle cylinder. The determination steps are as follows:
(1) after stirring the sample at 12000rpm for 10min, the sample was heated to 65 ℃ in a water bath.
(2) VSST settling shoes are filled into the matched measuring cup, and the sample is poured into the matched measuring cup.
(3) Taking a clean 10mL glass needle tube (the glass needle tube after being made is cleaned by using oil powder and then is wiped by using paper for standby use), peeling the glass needle tube heavily, and recording initial weight data m 0 。
(4) Highly stirring for 15min under the condition of 600 revolutions, extracting 10mL of mud at a collection tank of a settling shoe by using a needle tube, slightly beating the needle tube after the needle tube is upright upwards to enable internal bubbles to rise to the top, carefully pressing the needle tube until the mud in the needle tube is just 10mL, weighing, and recording a reading m 1 Calculating the density rho 1 。
(5) Pumping the slurry in the needle tube into a collecting tank, heating to 65 ℃ according to the steps, mounting a slurry cup on a six-speed rotational viscometer, stirring for 30min at 100 revolutions, performing collecting tank extraction measurement, and recording the reading m 2 . Calculating the density p 2 。
(6)Δρ Dynamic state ＝ρ 2 - ρ 1 Is a dynamic sedimentation density difference, S R Exp (-K × Δ ρ/ρ), K was 10.9 when tested using this method; s R ≤1.0，S R A value of 1.0 indicates no sedimentation, S R The smaller the size, the more likely sedimentation will occur when field application is indicated.
TABLE 8 analysis of dynamic sedimentation stability impact
According to the VSST settling shoe experiment, after the plugging agent is added, the system settling stability coefficient S R The maximum can be increased to 0.7604, the cutting effect is obvious, and the suspension stability of the drilling fluid system can be effectively enhanced.
In summary, the low-friction film-forming plugging agent for the high-temperature oil-based drilling fluid, and the preparation method and the application thereof of the low-friction film-forming plugging agent provided by the invention have the advantages that:
(1) the plugging agent can reduce underground friction and improve shearing force.
(2) The plugging agent has small influence on the rheological property of a drilling fluid system, and can enhance the dynamic settlement stability of the oil-based drilling fluid.
(3) The blocking agent can meet the requirement of film formation without using sodium alginate.
(4) The plugging agent can meet the requirements of ultra-high temperature deep well low friction resistance well, and the use temperature can reach 200 ℃.
(5) The preparation method is simple and convenient, short in flow and low in cost.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A preparation method of a low-friction film-forming plugging agent for a high-temperature oil-based drilling fluid is characterized by comprising the following steps:
uniformly mixing 20-40 parts of silicon emulsion, 10-20 parts of fluorine emulsion, 9-11 parts of nano solid material, 6-8 parts of film forming additive, 2-4 parts of high temperature resistant modified micro powder, 3-5 parts of high temperature resistant emulsified asphalt and deionized water in parts by weight to obtain the low-friction film forming blocking agent for the high temperature oil-based drilling fluid;
the silicone-based emulsion comprises: the core-shell styrene-acrylic emulsion contains an organic silicon modified group, an epoxy modified group, a double-bond unsaturated acid modified group and a double-bond unsaturated hydroxyl modified group;
the fluorine-based emulsion comprises: contains an organic fluorine modified group, an epoxy modified group, a double-bond unsaturated acid modified group and a double-bond unsaturated hydroxyl modified group.
2. The preparation method of the low-friction film-forming plugging agent for the high-temperature oil-based drilling fluid according to claim 1, wherein in the silicon emulsion, the mass ratio of the organosilicon modifying groups is 6-8%, the mass ratio of the epoxy modifying groups is 6-8%, the mass ratio of the double-bond unsaturated acid modifying groups is 10-20%, and the mass ratio of the double-bond unsaturated hydroxyl modifying groups is 1-2%.
3. The preparation method of the low-friction film-forming plugging agent for the high-temperature oil-based drilling fluid according to claim 1, wherein in the fluorine-based emulsion, the mass ratio of the organic fluorine modified groups is 6-8%, the mass ratio of the epoxy modified groups is 2-3%, the mass ratio of the double-bond unsaturated acid modified groups is 10-20%, and the mass ratio of the double-bond unsaturated hydroxyl modified groups is 1-2%.
4. The preparation method of the low-friction film-forming plugging agent for the high-temperature oil-based drilling fluid according to claim 1, wherein the nano solid particles comprise nano silica, nano graphite and nano polytetrafluoroethylene.
5. The method of preparing a low friction film forming plugging agent for a high temperature oil-based drilling fluid according to claim 1, wherein the film forming aid comprises a decaglycol ester.
6. The method for preparing the low-friction film-forming plugging agent for the high-temperature oil-based drilling fluid according to claim 1, wherein the high-temperature-resistant modified micro powder comprises ultrafine molybdenum oxide and surface-modified polytetrafluoroethylene micro powder.
7. The preparation method of the low-friction film-forming plugging agent for the high-temperature oil-based drilling fluid according to claim 1, wherein the temperature resistance of the high-temperature-resistant emulsified asphalt is more than or equal to 200 ℃.
8. A low-friction film-forming plugging agent for high-temperature oil-based drilling fluid, which is characterized by comprising the plugging agent prepared by the preparation method of the low-friction film-forming plugging agent for the high-temperature oil-based drilling fluid, according to any one of claims 1 to 7.
9. The use of a low friction film-forming plugging agent for high temperature oil-based drilling fluids according to claim 8 added in a water-in-oil emulsion.
10. The use of a low friction film-forming plugging agent for high temperature oil-based drilling fluids according to claim 8 in the preparation of oil-based drilling fluids.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194750A (en) * | 2014-07-30 | 2014-12-10 | 中国石油天然气集团公司 | Nanometer blocking agent for oil-based drilling fluid and preparation method of nanometer blocking agent |
| CN104774602A (en) * | 2014-01-14 | 2015-07-15 | 中国石油化工股份有限公司 | High-temperature-resistant blocking agent, and preparation method and application thereof |
| CN105693944A (en) * | 2014-11-27 | 2016-06-22 | 合众（佛山）化工有限公司 | Preparation method of high-temperature-resistant modified styrene acrylic emulsion |
| CN105859937A (en) * | 2016-04-25 | 2016-08-17 | 山东玉皇化工有限公司 | Fluorine-silicon modified styrene-acrylic emulsion with hydrophobic property and preparing method thereof |
| CN105936819A (en) * | 2016-04-22 | 2016-09-14 | 中国石油集团川庆钻探工程有限公司 | Plugging agent for oil-based drilling fluid and preparation method thereof |
| CN106479456A (en) * | 2016-08-31 | 2017-03-08 | 成都西油华巍科技有限公司 | A kind of drilling fluid polynary vinyl polymer emulsion film forming sealing agent and preparation method thereof |
| CN106833564A (en) * | 2017-01-06 | 2017-06-13 | 中国石油天然气集团公司 | A kind of water-base drilling fluid and its application suitable for shale gas long well section horizontal well |
| CN106832080A (en) * | 2017-02-14 | 2017-06-13 | 中山市博海精细化工有限公司 | A kind of woodcare paint styrene-acrylate core/shell emulsion and preparation method thereof |
| CN107686720A (en) * | 2016-08-03 | 2018-02-13 | 中国石油集团长城钻探工程有限公司钻井液公司 | A kind of shale gas strata drilling liquid film forming sealing agent and preparation method thereof |
| CN108239522A (en) * | 2016-12-27 | 2018-07-03 | 中国石油化工股份有限公司 | A kind of drilling fluid micro-nano closure lubricant and preparation method |
| CN108503744A (en) * | 2018-03-28 | 2018-09-07 | 中国石油大学(华东) | Acrylic emulsion and its preparation method and application with nucleocapsid |
| CN109097013A (en) * | 2018-09-06 | 2018-12-28 | 中国海洋石油集团有限公司 | A kind of high temperature resisting type oil base drilling fluid pressure-bearing sealing agent and preparation method thereof |
| CN110698580A (en) * | 2019-10-11 | 2020-01-17 | 北京宏勤石油助剂有限公司 | Nano latex strong plugging agent for drilling fluid and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10221636B2 (en) * | 2017-03-02 | 2019-03-05 | Baker Hughes, A Ge Company, Llc | Polymer-modified asphalt for drilling fluid applications |
-
2020
- 2020-03-27 CN CN202010231047.4A patent/CN111484833B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104774602A (en) * | 2014-01-14 | 2015-07-15 | 中国石油化工股份有限公司 | High-temperature-resistant blocking agent, and preparation method and application thereof |
| CN104194750A (en) * | 2014-07-30 | 2014-12-10 | 中国石油天然气集团公司 | Nanometer blocking agent for oil-based drilling fluid and preparation method of nanometer blocking agent |
| CN105693944A (en) * | 2014-11-27 | 2016-06-22 | 合众（佛山）化工有限公司 | Preparation method of high-temperature-resistant modified styrene acrylic emulsion |
| CN105936819A (en) * | 2016-04-22 | 2016-09-14 | 中国石油集团川庆钻探工程有限公司 | Plugging agent for oil-based drilling fluid and preparation method thereof |
| CN105859937A (en) * | 2016-04-25 | 2016-08-17 | 山东玉皇化工有限公司 | Fluorine-silicon modified styrene-acrylic emulsion with hydrophobic property and preparing method thereof |
| CN107686720A (en) * | 2016-08-03 | 2018-02-13 | 中国石油集团长城钻探工程有限公司钻井液公司 | A kind of shale gas strata drilling liquid film forming sealing agent and preparation method thereof |
| CN106479456A (en) * | 2016-08-31 | 2017-03-08 | 成都西油华巍科技有限公司 | A kind of drilling fluid polynary vinyl polymer emulsion film forming sealing agent and preparation method thereof |
| CN108239522A (en) * | 2016-12-27 | 2018-07-03 | 中国石油化工股份有限公司 | A kind of drilling fluid micro-nano closure lubricant and preparation method |
| CN106833564A (en) * | 2017-01-06 | 2017-06-13 | 中国石油天然气集团公司 | A kind of water-base drilling fluid and its application suitable for shale gas long well section horizontal well |
| CN106832080A (en) * | 2017-02-14 | 2017-06-13 | 中山市博海精细化工有限公司 | A kind of woodcare paint styrene-acrylate core/shell emulsion and preparation method thereof |
| CN108503744A (en) * | 2018-03-28 | 2018-09-07 | 中国石油大学(华东) | Acrylic emulsion and its preparation method and application with nucleocapsid |
| CN109097013A (en) * | 2018-09-06 | 2018-12-28 | 中国海洋石油集团有限公司 | A kind of high temperature resisting type oil base drilling fluid pressure-bearing sealing agent and preparation method thereof |
| CN110698580A (en) * | 2019-10-11 | 2020-01-17 | 北京宏勤石油助剂有限公司 | Nano latex strong plugging agent for drilling fluid and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 抗高温油基钻井液封堵剂PF-MOSHIELD的研制与应用;王伟等;《钻井液与完井液》;20190330(第02期);全文 * |
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