WO2022230962A1 - Agent de déviation et procédé de remplissage d'une fracture de descente par celui-ci - Google Patents

Agent de déviation et procédé de remplissage d'une fracture de descente par celui-ci Download PDF

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Publication number
WO2022230962A1
WO2022230962A1 PCT/JP2022/019185 JP2022019185W WO2022230962A1 WO 2022230962 A1 WO2022230962 A1 WO 2022230962A1 JP 2022019185 W JP2022019185 W JP 2022019185W WO 2022230962 A1 WO2022230962 A1 WO 2022230962A1
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Prior art keywords
diverting agent
resin
mass
resin molding
agent according
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PCT/JP2022/019185
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English (en)
Japanese (ja)
Inventor
泰広 平野
祐哉 金森
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三菱ケミカル株式会社
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Priority to JP2023517610A priority Critical patent/JPWO2022230962A1/ja
Publication of WO2022230962A1 publication Critical patent/WO2022230962A1/fr

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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
    • C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
    • C09K8/504—Compositions based on water or polar solvents
    • C09K8/506—Compositions based on water or polar solvents containing organic compounds
    • C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds

Definitions

  • the present invention relates to a diverting agent and a method of closing cracks in a well using the same, and more particularly, to a diverting agent used during construction of an excavation method using hydraulic fracturing, and the diverting agent. to a method of plugging cracks in a wellbore using a.
  • Hydraulic fracturing in which high-pressure water is injected into underground shale layers to create cracks, is widely used to extract oil and other underground resources.
  • a vertical hole vertical well
  • a drill. excavate By filling the vertical and horizontal wells with fluid and pressurizing the fluid, fractures are generated from the wells, and natural gas and oil (shale gas and oil) in the shale layer are released from the fractures. Etc. will flow out, so collect it.
  • the generation of cracks increases the resource inflow cross-section of the well, making it possible to efficiently extract underground resources.
  • preliminary blasting called perforation is performed in a horizontal well prior to the generation of cracks by fluid pressurization.
  • Such preliminary blasting pierces the production formation from the wellbore.
  • the fluid flows into these boreholes and a load is applied to the boreholes, causing cracks to form in the boreholes and to form cracks of suitable size for resource extraction. It will grow into a crack.
  • the diverting agent Since the diverting agent is used to temporarily close the cracks as described above, it can maintain its shape for a certain period of time, and it is hydrolyzed and disappears when extracting natural gas, petroleum, etc. are used.
  • various techniques using hydrolyzable resins such as polyglycolic acid and polylactic acid as diverting agents have been proposed.
  • Patent Literature 1 proposes a temporary sealing agent for well excavation containing polyglycolic acid, which is highly biodegradable among biodegradable aliphatic polyester resins. Further, in Patent Document 2, a powder made of particles of polylactic acid, which is a biodegradable resin, has 50% by mass or more of particles that do not pass when sifted through a sieve with an opening of 500 ⁇ m, and has an angle of repose of 51 degrees or more. is proposed.
  • Patent Document 3 hydrolyzable particles having a dispersed structure in which fine particles of highly biodegradable polyoxalate for adjusting the hydrolyzability of polylactic acid are distributed in polylactic acid
  • the proposed hydrolyzable particles have an average particle diameter (D 50 ) in the range of 300 to 1000 ⁇ m and a roundness with a minor axis/major axis ratio of 0.8 or more.
  • Patent Document 4 proposes polyoxalate particles having an average particle diameter (D 50 ) in the range of 300 to 1000 ⁇ m and a roundness with a minor axis/major axis ratio of 0.8 or more. ing.
  • the present invention has been made to solve the above problems, and is a diverting agent for temporarily closing cracks in a well, which has excellent crack closing properties and is soluble in water.
  • An object of the present invention is to provide a diverting agent that can be quickly removed after a certain period of time has elapsed.
  • the present inventors have solved the above problem by incorporating a biodegradable resin molding having a specific range of elastic modulus and a particle size of 1000 ⁇ m or more in the diverting agent. I found that it can be done, and came to complete the present invention.
  • the present invention is characterized by the following (1) to (9).
  • a diverting agent comprising a resin molded body having a particle size of 1000 ⁇ m or more, the resin molded body containing a biodegradable resin, and a tensile elastic modulus of the resin molded body at 23° C. of 2200 MPa or less.
  • the resin molding contains at least one additive selected from the group consisting of an ester compound and an alcohol compound.
  • the diverting agent according to (2) above, wherein the additive is contained in an amount of 40% by mass or less in the resin molding.
  • the biodegradable resin is at least one selected from the group consisting of polylactic acid, polybutylene succinate, polyvinyl alcohol, polyglycolic acid, polybutylene adipate terephthalate, polyethylene terephthalate succinate and polybutylene sebacate terephthalate;
  • the resin molding has at least one shape selected from the group consisting of pellets, granules, spherical shapes, and flake shapes. ting agent.
  • a method for temporarily plugging cracks formed in a well comprising placing the diverting agent according to any one of (1) to (8) above a flow of fluid in the well. A method of plugging a crack in a well that allows flow into the crack to be closed.
  • the diverting agent of the present invention is excellent in blocking the target gap, and can be easily removed when the plug is opened. Therefore, it can be suitably used for hydraulic fracturing in drilling for natural gas, petroleum, and the like. .
  • the diverting agent of the present invention contains a resin molding having a particle size of 1000 ⁇ m or more.
  • the resin molding contains a biodegradable resin and has a tensile modulus of elasticity of 2200 MPa or less at 23°C. Since the diverting agent contains a biodegradable resin-containing resin molded body (hereinafter also simply referred to as "resin molded body") having a tensile modulus of elasticity of 2200 MPa or less at 23° C., the diverting agent has an appropriate elastic force. It becomes easier to fit the shape of the crack. This can improve the closing property against cracks.
  • the resin molding contained in the diverting agent of the present invention is hydrolyzable and contains a biodegradable resin.
  • biodegradable resins include chemosynthetic biodegradable resins, natural product-derived biodegradable resins, and microbial biodegradable resins. These may be used individually by 1 type, and may be used in combination of 2 or more type.
  • Examples of chemically synthesized biodegradable resins include aliphatic polyesters, aliphatic/aromatic polyesters, polyvinyl alcohol (PVA), and polyurethanes (PU).
  • Examples of aliphatic polyesters include polylactic acid (PLA), polybutylene succinate (PBS), polybutylene succinate adipate (PBSA), polyglycolic acid (PGA), polyethylene succinate (PES), and polycaprolactone (PCL).
  • PPA polybutylene adipate terephthalate
  • PETS polyethylene terephthalate succinate
  • PBSeT polybutylene sebacate terephthalate
  • biodegradable resins derived from natural products include chitin, chitosan, alginic acid, gluten, collagen, polyamino acids, cellulose, pullulan, curdlan, polysaccharide by-products, starch, and modified starch.
  • biodegradable resins produced by microorganisms include poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBH), polyhydroxyalkanoic acid (PHA), bacterial cellulose, and poly-3-hydroxybutyrate. (PHB) and the like.
  • biodegradable resins such as polylactic acid (PLA), polybutylene succinate (PBS), polyvinyl alcohol (PVA), and polyglycolic acid (PGA).
  • PBS polybutylene adipate terephthalate
  • PETS polyethylene terephthalate succinate
  • PBSeT polybutylene sebacate terephthalate
  • PLA polylactic acid
  • PBS polybutylene succinate
  • PVA polyvinyl alcohol
  • PGA polyglycolic acid
  • the biodegradable resin is contained in the resin molding in an amount of 60% by mass or more. If the content of the biodegradable resin in the resin molding is 60% by mass or more, hydrolysis can be easily adjusted, so that the diverting agent can be quickly removed after clogging the cracks.
  • the content of the biodegradable resin in the resin molding is more preferably 70% by mass or more, still more preferably 75% by mass or more, and particularly preferably 80% by mass or more, and the upper limit is 23% of the resin molding.
  • the tensile modulus at °C is 2200 MPa or less, and it may consist of only a biodegradable resin (100% by mass).
  • the resin molding may contain additives in order to adjust the tensile modulus of the molding at 23°C.
  • a plasticizer elastomer, or the like that can impart flexibility to the biodegradable resin
  • plasticizers include ester-based compounds and alcohol-based compounds.
  • thermoplastic elastomers include styrene-based elastomers. These may be used individually by 1 type, and may be used in combination of 2 or more type.
  • An ester-based compound is a compound having an ester bond in the molecule, and includes, for example, dibasic acid ester-based compounds, phosphate ester-based compounds, and phthalate-based compounds.
  • dibasic acid ester compounds include mixed group dibasic acid ester, dibutyl adipate, diisobutyl adipate, bis(2-ethylhexyl) adipate, diisononyl adipate, diisodecyl adipate, bis[2-(2-butoxyethoxy)ethyl].
  • Phosphate compounds include, for example, trimethyl phosphate, triethyl phosphate, tributyl phosphate, trioctyl phosphate, tributoxyethyl phosphate, triphenyl phosphate, tricresyl phosphate, cresyl diphenyl phosphate, octyldiphenyl phosphate, diisopropylphenyl phosphate, tris(chloroethyl) phosphate, tris(dichloropropyl) phosphate, tris(chloropropyl) phosphate, bis(2,3-dibromopropyl)-2,3-dichloropropyl phosphate, tris(2,3-dibromopropyl) phosphate, bis (Chloropropyl) monooctyl phosphate, bisphenol A bisphosphate, hydroquinone bisphosphate, resorcin bisphosphate, trioxybenzene
  • phthalate compounds include dioctyl phthalate, dibutyl phthalate, diisononyl phthalate, diisodecyl phthalate, and butylbenzyl phthalate.
  • alcohol compounds include monohydric alcohols such as butyl alcohol, (iso- or n-)amyl alcohol, hexyl alcohol, heptyl alcohol, 1-octanol, 2-ethylhexyl alcohol, n-dodecyl alcohol, lauryl alcohol, and oleyl alcohol.
  • dihydric alcohols such as 1,5-pentanediol, ethylene glycol, propylene glycol, 2-methyl-2,4-pentanediol, 1,6-hexanediol; trimethylolpropane, trimethylolethane, glycerin, trihydric alcohols such as phytantriol; tetrahydric alcohols such as pentaerythritol and diglycerin; and polyhydric alcohols such as polyglycerin.
  • styrene-based elastomers examples include styrene/butadiene/block copolymers, styrene/butadiene/butylene block copolymers (SBBS), styrene/ethylene/butylene block copolymers (SEBS), and styrene/isoprene block copolymers.
  • SBBS styrene/butadiene/block copolymers
  • SEBS styrene/ethylene/butylene block copolymers
  • SIBS styrene/isoprene block copolymers
  • it preferably contains a plasticizer, more preferably contains at least one selected from the group consisting of an ester compound and an alcohol compound, more preferably an ester compound, and a dibasic Acid ester compounds are particularly preferred, and mixed-group dibasic acid esters are most preferred.
  • the content of the additive is preferably more than 0% by mass and 40% by mass or less in the resin molded product. If the content of the additive is too large, the operational stability during molding tends to deteriorate, so the content is preferably 40% by mass or less.
  • the content of the additive in the resin molding is more preferably 30% by mass or less, more preferably 25% by mass or less, particularly preferably 20% by mass or less, and the lower limit is not particularly limited.
  • the resin molding can contain any component within the range that does not impair the effects of the present invention.
  • optional components include UV inhibitors, colorants, inorganic fillers, organic solvents, and the like.
  • the resin molding can be manufactured by a conventionally known method.
  • the manufacturing method is preferably a melt molding method, and examples thereof include an injection molding method, an extrusion molding method such as a T-die method and an inflation method, a compression molding method, a blow molding method, a vacuum molding method and press molding.
  • the injection molding method, the extrusion molding method, and the compression molding method are preferable.
  • a biodegradable resin may be dry blended with optional additives and optional components, melt-kneaded, extruded using an extruder, and cut into a desired size to obtain a resin molded product.
  • extruders include single-screw extruders and twin-screw extruders, and twin-screw extruders are preferably used from the viewpoint of productivity.
  • the shape of the resin molding is not particularly limited, but examples include pellets, granules, cylinders, polygonal columns, cones, polygonal pyramids, plates, cubes, cuboids, prisms, polygons, and spherical. , bicone shape, flake shape, and the like. Among them, from the viewpoint of efficiency of closing cracks, it is preferable to have at least one shape selected from the group consisting of pellets, granules, spherical and flakes.
  • the size of the resin molding contained in the diverting agent of the present invention has a particle size of 1000 ⁇ m or more.
  • the particle size refers to the diameter of the smallest circumscribed circle that circumscribes the resin molding.
  • the particle size of the resin molding is preferably 1500 ⁇ m or more, more preferably 2000 ⁇ m or more. From the viewpoint of removability when the cap is opened, the particle size of the resin molding is preferably 6000 ⁇ m or less, more preferably 5000 ⁇ m or less, and even more preferably 4000 ⁇ m or less.
  • the particle size of the resin molding can be directly measured using a vernier caliper or the like.
  • the resin molding has a tensile modulus of 2200 MPa or less at 23°C.
  • the tensile elastic modulus of the resin molding at 23° C. is preferably 2100 MPa or less, more preferably 2000 MPa or less, and even more preferably 1800 MPa or less.
  • the tensile modulus is preferably 50 MPa or more, more preferably 100 MPa or more, and even more preferably 150 MPa or more.
  • the tensile modulus of the resin molded body at 23° C. is measured by the method described in Examples using a tensile tester (for example, precision universal testing machine Autograph: AG-IS manufactured by Shimadzu Corporation). be done.
  • a tensile tester for example, precision universal testing machine Autograph: AG-IS manufactured by Shimadzu Corporation.
  • the resin molding preferably has a residual rate at 80° C. measured by the following method of 80 to 100% after 1 day and 75% or less after 14 days. Measurement method: A 140 mL glass container with a lid containing 100 g of water is placed in a constant temperature machine, and the water temperature is adjusted to 80°C. A nylon 120 mesh (opening 125 ⁇ m, 10 cm ⁇ 7 cm) is folded in half along its long side, and both ends are heat-sealed to obtain a bag-like mesh (5 cm ⁇ 7 cm). 1 g of a resin molding is put into the resulting bag-like mesh, the opening is heat-sealed, a bag-like mesh containing the resin molding is obtained, and the mass is measured.
  • the bag-shaped mesh containing the resin molded body is immersed in the glass container, left to stand for 1 day or 14 days in a constant temperature machine at 80°C, then the bag-shaped mesh containing the resin molded body is removed from the glass container, and heated to 140°C. After drying for 3 hours, the mass of the bag-like mesh containing the resin molding is measured. The mass of the resin molding remaining in the bag-like mesh is calculated from the mass before immersion, and the residual rate is calculated by the following formula (A).
  • the residual rate at 80°C after one day is more preferably 85-100%, and more preferably 90-100%.
  • the resin molding is preferably contained in the diverting agent in an amount of 10% by mass or more.
  • the content of the resin molding is more preferably 15% by mass or more, more preferably 20% by mass or more, and the upper limit is not particularly limited, but is preferably 90% by mass or less. , is more preferably 85% by mass or less, and even more preferably 80% by mass or less.
  • the diverting agent of the present invention preferably further contains biodegradable resin powder having an average particle size of less than 1000 ⁇ m.
  • biodegradable resin powder having an average particle size of less than 1000 ⁇ m when the cracks are filled with the diverting agent, the above-described resin molded body becomes a support for filling in the cracks, and the gap between the resin molded bodies is averaged. Since the biodegradable resin powder having a particle size of less than 1000 ⁇ m can close the cracks, the cracks can be more effectively closed.
  • the average particle size of the biodegradable resin powder is preferably 100 ⁇ m or more, more preferably 200 ⁇ m or more, still more preferably 300 ⁇ m or more, and preferably less than 1000 ⁇ m, more preferably 980 ⁇ m or less, and 950 ⁇ m or less. More preferred.
  • the average particle size of the biodegradable resin powder can be measured by the dry sieving test method (JIS Z 8815:1994).
  • biodegradable resin that constitutes the biodegradable resin powder the same biodegradable resin as described above can be mentioned, and the preferred biodegradable resin is also the same.
  • the biodegradable resin powder may be the same as or different from the resin forming the resin compact.
  • the biodegradable resin powder is preferably contained in the diverting agent in a range of 10-90% by mass.
  • the content of the biodegradable resin powder is 10% by mass or more, the gaps between the resin moldings can be closed tightly.
  • the content of the biodegradable resin powder exceeds 90% by mass, the content of the resin molded body that serves as a support during closure may decrease, resulting in a decrease in closing performance.
  • the content of the biodegradable resin powder in the diverting agent is more preferably 15% by mass or more, more preferably 20% by mass or more, and the upper limit is more preferably 85% by mass or less. % or less by mass is more preferable.
  • the diverting agent of the present invention may contain other additives as long as they do not impair the effects of the present invention.
  • other additives include inorganic substances such as ceramics, sand, calcium carbonate, mica, silica, alumina, quartz, and feldspar; metals such as iron, and plant-derived substances such as sawdust, wood chips, and seed husks. .
  • the content of other additives is preferably 40% by mass or less, more preferably 30% by mass or less, and even more preferably 20% by mass or less, relative to the entire diverting agent.
  • the diverting agent of the present invention comprises the biodegradable resin-containing resin compact having a particle size of 1,000 ⁇ m or more, optionally biodegradable resin powder having an average particle size of less than 1,000 ⁇ m, and other additives in an arbitrary ratio. It can be manufactured by mixing with For example, resin molding: 90 to 10% by mass, biodegradable resin powder: 10 to 90% by mass, other additives: 0 to 40% by mass. It can be set as appropriate, taking into consideration the nature and the like.
  • the diverting agent of the present invention temporarily closes cracks and is hydrolyzed and removed after a desired period of time.
  • the time until removal can be arbitrarily set depending on the place of use, purpose of use, and the like.
  • the temperature (water temperature) during hydrolysis of the diverting agent of the present invention is preferably in the range of room temperature (specifically, 23°C) to 150°C.
  • room temperature specifically, 23°C
  • PVA polyvinyl alcohol
  • Warm is preferred.
  • the diverting agent of the present invention preferably has a hydraulic conductivity (slope a) of 50 or less measured by the following method. Measurement method: A diverting agent was added to a 0.48% by mass aqueous solution of guar gum to prepare a mixture with a diverting agent concentration of 6% by mass, and the mixture was dispersed at 23°C for 60 minutes to obtain a dispersion. Then, the dispersion is pressurized and dehydrated at a pressure of 0.4 MPa using a pressurized dehydrator equipped with a drainage part having a slit with a width of 2 mm, and the integrated amount of dewatered water y is obtained with respect to the square root of time x.
  • slope a hydraulic conductivity
  • a regression line represented by the following formula (B) is calculated by the least squares method from a scatter diagram in which the square root of time x is plotted on a graph with the cumulative dehydration amount y on the vertical axis, and the slope a of formula (B) is the permeability coefficient.
  • y ax+b (B)
  • y is the cumulative dehydration amount (g)
  • x is the square root of the time (minutes) elapsed from the start of pressurization
  • a and b represent the slope and intercept of the regression line, and 0 ⁇ x ⁇ 2 be.
  • pressurized dehydrator examples include Fann Instrument's "HPHT Filter Press 500CT” (trade name).
  • x is the square root of the time (minutes) elapsed from the start of pressurization
  • y is the cumulative amount of dehydrated water (g).
  • a and b are the slope and intercept of the regression line.
  • the slope a represents the flowability of water in the dispersion of the diverting agent
  • the intercept b is a variable determined by the slope a, and is a value that serves as a measure of the dehydration amount at 0 minutes from the start of pressurization.
  • the slope a representing the hydraulic conductivity is more preferably 45 or less, more preferably 40 or less, and the smaller the value of the slope a (the closer it is to 0), the better, and the lower limit is not particularly limited.
  • the diverting agent of the present invention enters into cracks and crevices generated in wells and temporarily closes the cracks and crevices when hydraulic fracturing is used in drilling for oil, natural gas, or the like. can be done. Therefore, new cracks and fissures can be formed while the cracks are temporarily blocked by the diverting agent of the present invention.
  • the diverting agent of the present invention may be introduced into the cracks by fluid flow in the wellbore. As a result, it is possible to temporarily seal the cracks to be closed.
  • the diverting agent of the present invention is both hydrolyzable and biodegradable, it is quickly hydrolyzed and removed after use, and since it is biodegradable, non-hydrolyzed residues remain. It is very useful because it can reduce the environmental load even in cases.
  • test methods for the resin moldings and diverting agents obtained in the examples below are as follows.
  • tensile modulus of resin molding As a tensile tester, a precision universal testing machine Autograph "AG-IS" manufactured by Shimadzu Corporation was used. A strand-shaped resin molding (diameter 2.6 mm) extruded from the extruder is fixed to a fixing jig adjusted to a chuck-to-chuck distance of 100 mm, pulled at a tensile speed of 10 mm / min, and the resin at 23 ° C. and 50% RH The elastic modulus (MPa) of the molded body was measured. The tensile modulus was calculated from the slope of the stress/strain curve corresponding to the two strain points of 0.5% and 1.0% or the slope of the regression line.
  • the bag-shaped mesh containing the resin molded body is immersed in the glass container, left to stand for 1 day or 14 days in a constant temperature machine at 80°C, then the bag-shaped mesh containing the resin molded body is removed from the glass container, and heated to 140°C. After drying for 3 hours, the mass of the bag-like mesh containing the resin molding was measured. The mass of the resin molded body remaining in the bag-like mesh was calculated from the mass before immersion, and the residual rate of the resin molded body was calculated by the following formula (A).
  • the dispersion liquid is pressurized and dehydrated at a pressure of 0.4 MPa using the above pressurized dehydrator equipped with a drainage part having a slit with a width of 2 mm, and the integrated amount of dehydrated water y is obtained with respect to the square root of time x.
  • a regression line represented by the following formula (B) is calculated by the method of least squares from a scatter diagram in which the square root of time x is plotted on a graph with the cumulative dehydration amount y on the vertical axis, and the slope a of formula (B) is calculated. It was obtained as a permeability coefficient.
  • y ax+b (B) (In formula (B), y is the cumulative dehydration amount (g), x is the square root of the time (minutes) elapsed from the start of pressurization, a and b represent the slope and intercept of the regression line, and 0 ⁇ x ⁇ 2 be.)
  • Comparative example 1 2000 g of polylactic acid (PLA, “Ingeo” manufactured by Nature Works) was melt-kneaded and extruded with a twin-screw extruder, and then cut into cylindrical raw materials having a diameter of 2.6 mm and an axial length of 3.0 mm. A decomposable resin-containing resin molding (pellet) was obtained. 70 parts of the obtained resin molding and 30 parts of powder (average particle size 450 ⁇ m) obtained by freeze-pulverizing polybutylene adipate terephthalate (PBAT, “ecoflex” manufactured by BASF) were mixed to obtain a diverting agent. got
  • Example 5 2000 g of polybutylene succinate (PBS, MFR: 5 g/10 min (190° C., 2.16 kg)) was melt-kneaded and extruded with a twin-screw extruder, cut into 2.6 mm diameter, axially A columnar biodegradable resin-containing resin molding (pellet) having a length of 3.0 mm was obtained. 70 parts of the obtained resin molding and 30 parts of powder (average particle size 450 ⁇ m) obtained by freeze-pulverizing polybutylene adipate terephthalate (PBAT, “ecoflex” manufactured by BASF) were mixed to obtain a diverting agent. got
  • Example 6 1,800 g of polybutylene succinate (PBS, MFR: 5 g/10 min (190° C., 2.16 kg)) and 200 g of mixed-group dibasic acid ester (ester-based plasticizer, “DAIFATTY-101” manufactured by Daihachi Chemical Industry Co., Ltd.) was melt-kneaded and extruded by a twin-screw extruder, and then cut to obtain a cylindrical biodegradable resin-containing resin molding (pellet) having a diameter of 2.6 mm and an axial length of 3.0 mm.
  • Example 7 Example except that 1,600 g of polybutylene succinate (PBS) and 400 g of mixed-group dibasic acid ester were used, and the mass ratio of polybutylene succinate (PBS): mixed-group dibasic acid ester was set to 80:20.
  • PBS polybutylene succinate
  • a biodegradable resin-containing resin molding (pellet) and a diverting agent were obtained in the same manner as in 6.

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Abstract

La présente invention concerne un agent de déviation qui est hautement efficace dans le remplissage de fractures et qui présente une solubilité dans l'eau pour être rapidement retiré après l'écoulement d'une certaine période de temps. Cet agent de déviation comprend une résine façonnée présentant un diamètre de particule de 1000 µm ou plus, la résine façonnée comprenant une résine biodégradable et présentant un module de traction à 23°C de 2200 MPa ou moins.
PCT/JP2022/019185 2021-04-28 2022-04-27 Agent de déviation et procédé de remplissage d'une fracture de descente par celui-ci WO2022230962A1 (fr)

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Citations (5)

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Publication number Priority date Publication date Assignee Title
WO2013052252A1 (fr) * 2011-10-04 2013-04-11 Halliburton Energy Services, Inc. Procédés de réduction de perte de fluide, de déviation et d'étanchéification utilisant des matières particulaires déformables
WO2016153750A1 (fr) * 2015-03-23 2016-09-29 Schlumberger Technology Corporation Dégradation contrôlée d'élastomères et utilisation dans des applications de champ pétrolifère
WO2018231236A1 (fr) * 2017-06-15 2018-12-20 Halliburton Energy Services, Inc. Matériaux de dérivation plastifiés à base d'alcool polyvinylique
WO2019131939A1 (fr) * 2017-12-28 2019-07-04 三菱ケミカル株式会社 Agent de déviation et procédé de colmatage de fissures dans un puits utilisant celui-ci
WO2021002471A1 (fr) * 2019-07-03 2021-01-07 三菱ケミカル株式会社 Agent de déviation et procédé de colmatage de fissures dans un puits l'utilisant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013052252A1 (fr) * 2011-10-04 2013-04-11 Halliburton Energy Services, Inc. Procédés de réduction de perte de fluide, de déviation et d'étanchéification utilisant des matières particulaires déformables
WO2016153750A1 (fr) * 2015-03-23 2016-09-29 Schlumberger Technology Corporation Dégradation contrôlée d'élastomères et utilisation dans des applications de champ pétrolifère
WO2018231236A1 (fr) * 2017-06-15 2018-12-20 Halliburton Energy Services, Inc. Matériaux de dérivation plastifiés à base d'alcool polyvinylique
WO2019131939A1 (fr) * 2017-12-28 2019-07-04 三菱ケミカル株式会社 Agent de déviation et procédé de colmatage de fissures dans un puits utilisant celui-ci
WO2021002471A1 (fr) * 2019-07-03 2021-01-07 三菱ケミカル株式会社 Agent de déviation et procédé de colmatage de fissures dans un puits l'utilisant

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