CN116063051A - Inorganic gel sand control material and preparation method thereof - Google Patents

Inorganic gel sand control material and preparation method thereof Download PDF

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Publication number
CN116063051A
CN116063051A CN202111290824.3A CN202111290824A CN116063051A CN 116063051 A CN116063051 A CN 116063051A CN 202111290824 A CN202111290824 A CN 202111290824A CN 116063051 A CN116063051 A CN 116063051A
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sand control
control material
component
inorganic gel
gel sand
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赵益忠
陈刚
李常友
梁伟
王勇
陈雪
贾维霞
贾培锋
吕超
张雨晨
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China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering Shengli Co
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China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering Shengli Co
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/06—Aluminous cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/32—Aluminous cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • 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
    • C09K8/57—Compositions based on water or polar solvents
    • C09K8/572—Compositions based on water or polar solvents containing inorganic compounds
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02—Subsoil filtering
    • E21B43/025—Consolidation of loose sand or the like round the wells without excessively decreasing the permeability thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/40—Porous or lightweight materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention relates to a sand control material for an oil field, in particular to an inorganic gel sand control material and a preparation method thereof. The raw materials comprise A, B components, wherein the component A is prepared by firing bauxite, limestone, anhydrite or dihydrate gypsum; the component B is as follows: an inorganic raw material of the same particle size as component A. Mixing the component A and the component B according to a certain proportion, grinding and screening particles with 10-20 meshes, stirring for 0.25-0.5 hour under the condition of 100-500 r/min, and then drying at 60-80 ℃ to obtain the composite material. The inorganic gel sand control material has high permeability and good sand control effect, the solidified body after solidification can resist high temperature, raw materials are easy to obtain and cheap, the steps required for preparation are fewer, and the defects of the existing sand control material are overcome.

Description

Inorganic gel sand control material and preparation method thereof
Technical Field
The invention relates to a sand control material for an oil field, in particular to an inorganic gel sand control material and a preparation method thereof.
Background
Most foreign heavy oil reservoirs belong to integral reservoirs, have good physical properties and high input-output ratio, and do not need to adopt a side drilling small well hole mode to meet the economic development requirement. Conventional thermal recovery development wells of wellbores mostly adopt two modes of chemical sand prevention and mechanical sand prevention, wherein a low-cost sand fixation method is focused abroad, and Texaco corporation researches a technology of injecting a chemical agent mixture and steam into a stratum together for sand fixation, wherein the temperature resistance can reach 370 ℃, but the overall consolidation strength is low, and the effective period is short. The mechanical sand prevention mainly aims at oil reservoirs and geological conditions of the first round, and ensures the sand prevention effect of the multi-round steam injection well in terms of screen pipe strength, corrosion resistance, construction parameter optimization, construction quality control and the like.
The domestic thermal recovery development oil reservoir mainly comprises loose sandstone, sand is seriously produced, the relation of oil-water layers is complex, the sidetrack casing is mainly 7in, the sidetrack directional well is mainly used for well cementation perforation completion, and the horizontal well is mainly used for open hole sand filtering pipe completion. The sand control process adopts common sand filtering pipe sand control or chemical sand control, and has a plurality of limitations: the difficulty of filling sand prevention is high, and the steam throughput causes the stratum sand to repeatedly move and wash out the screen pipe, so that the screen pipe is easy to fail; the resin sand-fixing agent has lower consolidation strength (4 MPa), poor wet heat resistance (200 ℃) and short effective period, and cannot meet the high-speed and high Wen Yeliu impact of a thermal production slim hole.
The Chinese patent No. 101270278B discloses a net-shaped sand control material which mainly comprises auxiliary materials and sand fixing materials, wherein the auxiliary materials adopt one or more of mica mineral materials, plastic fibers, wood, bamboo and walnut shell materials, and the weight parts of the auxiliary materials are 1.0-20; the sand fixing material adopts one or more of organic silicon resin, epoxy resin, phenolic resin, amino resin and furan resin, and the dosage is as follows: 20-80 parts by weight; the sand fixing material comprises additives H-1, Y-1 and Y-2, wherein the additive H-1 adopts polyvinyl butyral, polyvinyl acetal or polyvinyl formal, and the dosage is as follows: 1-10 parts by weight; the additive Y-1 adopts: one or more of gamma-aminopropyl triethoxysilane, gamma-aminopropyl trimethoxysilane, methyl triethoxysilane, propyl trimethoxysilane, gamma-mercaptopropyl triethoxysilane, gamma-mercaptopropyl methyl diethoxysilane, vinyl trimethoxysilane, trifluoropropyl trimethoxysilane, isocyanic acid propyl triethoxysilane, gamma- (methacryloyloxy) propyl trimethoxysilane, gamma- (methacryloyloxy) propyl methyl dimethoxy silane, 2- (3, 4-epoxycyclohexyl) ethyl trimethoxysilane, gamma-glycidoxy propyl methyl dimethoxy silane, and the dosage is as follows: 1-10 parts by weight;
the additive Y-2 adopts: one or more of hydroxymethyl cellulose and methyl ethyl ketone peroxide, and the dosage is as follows: the weight portion is 0.1-1 portion. The net-shaped sand control material has more complex components.
Chinese patent application CN111574762a discloses a method for preparing a filling-free self-adaptive sand control material, wherein rubber and additives are prepared by plasticating, banburying, mixing, extruding and vulcanizing; wherein, the weight portion of the rubber is 32-40, and the components comprise hydrogenated nitrile rubber; the additive comprises the following components in parts by weight: 30.2 to 32.8 portions of liquid-absorbing high polymer material; 9.1 to 9.4 portions of reinforcing penetrating agent; 1.5 to 2.0 portions of foaming agent; 1.4 to 2.0 portions of curing agent; 0.4 to 1.0 percent of accelerator; 1.1 to 1.9 portions of oil-water mutual soluble dispersing agent; 0.6 to 1.0 percent of anti-aging agent; zinc oxide 1.2-2.2; 0.5 to 0.8 percent of magnesium oxide. The method has the advantages of multiple preparation steps and complex components.
The Chinese patent No. 101942296B discloses a fiber composite sand control material and a preparation method thereof, wherein the fiber composite sand control material comprises a propping agent, a coating layer on the surface of the propping agent and fibers, the coating layer comprises resin and water inhibiting materials, the mass of the fibers is 1% -5% of that of the propping agent, the mass of the resin is 3% -10% of that of the propping agent, and the mass of the water inhibiting materials is 5% -15% of that of the resin. The fiber composite sand control material contains more resin.
The heavy oil reservoir is an important production area of an oil field, and the utilization reserve is 9.43 hundred million tons and accounts for 19.7 percent. The development mode is divided into thermal recovery and water flooding, wherein the thermal recovery thickened oil accounts for 59 percent. At present, a heavy oil reservoir for thermal recovery generally enters a multi-pass huff-puff stage, is greatly influenced by the heat-dissolution ratio of a stratum, has a heating radius which is difficult to break through 50m, is difficult to effectively utilize residual oil between wells, and a window-opening sidetrack of an old well becomes an effective means for excavating the residual oil in the later stage of multi-pass huff-puff of thermal recovery. Aiming at the problems of high occurrence of pipe channeling and casing damage and short service life faced in the sidetracking application and the problem that the existing well completion mode influences the implementation of the later layered sand control and layered steam injection process, the development of an inorganic chemical sand control system is developed, and the method has important significance for improving the application effect of sidetracking, recovering the capacity of the old well, digging and submerging the residual oil and improving the quality and efficiency of the heavy oil reservoir.
Disclosure of Invention
The invention mainly aims to provide an inorganic gel sand control material and a preparation method thereof, and the inorganic gel sand control material has higher permeability and good sand control effect, and the solidified body after solidification can resist high temperature, so that the defects of the existing sand control material are overcome.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides an inorganic gel sand control material, which comprises A, B two components, wherein component A comprises SiO 2 、Al 2 O 3 、Fe 2 O 3 、CaO、CaSO 3 The method comprises the steps of carrying out a first treatment on the surface of the The component B is as follows: an inorganic raw material of the same particle size as component A.
Further, the component A accounts for 60% -70% of the total weight of the sand control material; the component B accounts for 30-40% of the total weight of the sand control material.
Further, the component A is obtained by grinding bauxite, limestone and anhydrite or dihydrate gypsum, sintering at high temperature, crushing and screening, wherein SiO 2 Mass percent is less than 15%, al 2 O 3 Mass percent is more than 60%, fe 2 O 3 Less than or equal to 10 percent, caO mass percent less than 50 percent, caSO 3 The mass percentage is less than or equal to 38 percent.
Further, the material is obtained by crushing and screening after sintering at 1300-1400 ℃.
Further, the component A is formed by crushing and screening particles with the granularity of 10-20 meshes after high-temperature sintering.
Further, the component B is natural pumice particles with 10-20 meshes.
The inorganic gel sand control material is carried by water added with a certain additive as sand carrying fluid to squeeze into a stratum, and an artificial rock body with higher compressive strength and a certain permeability can be formed through two processes of hydration reaction and cementation hardening under water environment, so that a sand blocking barrier for blocking stratum sand and allowing fluid to pass through is realized.
The main hydration reaction:
3CaO·3Al 2 O 3 ·CaSO 4 +2(CaSO 4 ·2H 2 O)+34H 2 O→3CaO·Al 2 O 3 ·3CaSO 4 ·32H 2 O+2(Al 2 O 3 ·3H 2 O)(gel)2CaO·SiO 2 +2H 2 O→CaO-SiO 2 -H 2 O(Ⅰ)+Ca(OH) 2
the setting and hardening process comprises the following steps: hydration progresses from the surface of the particles to a deep portion, and colloidal particles entering the water from the particles rapidly increase, and crystals begin to interconnect and flocculate gradually into a gel structure. The impurities which do not hydrate in the particles and the cementing particles which do not enter the water form an artificial rock stratum framework together with the added aggregate; the gel is filled in the contact position of the framework to be solidified primarily.
The hydration process further develops, a large amount of crystals are separated out and connected with each other, so that the colloid is compact, the consolidation strength is obviously increased, the cement stone solid cementing body which is gradually hardened into a micro-crystallization structure and contains a large amount of pore spaces is formed, and the porous material artificial rock stratum with higher strength is formed.
The invention also provides a preparation method of the inorganic gel sand control material, which comprises the following steps:
mixing the component A and the component B according to a certain proportion, grinding and screening the particles with the particle size of 10-55 meshes, stirring for 1-5 hours under the condition of 500-1000 rpm, and then drying at the temperature of 60-80 ℃ to obtain the composite material.
The invention also provides a use method of the inorganic gel sand control material, which comprises the steps of injecting the inorganic gel sand control material and sand-carrying fluid into a target horizon according to the mass ratio of 5-50%, solidifying, establishing an artificial well wall, and producing an oil well after drilling and plugging.
The inorganic gel sand control material of the invention has a sand control mechanism: the inorganic granular cementing material is carried by sand-carrying liquid and extruded into a sand-producing stratum, hydrated and solidified into a whole in water environment to form an artificial porous stratum with certain strength and permeability, which can make up the defect of an oil layer entity, prevent the stratum from collapsing, and simultaneously has tortuous pore passages, so that fluid can smoothly pass through, and loose sand grains of the stratum are blocked outside the pore passages, so that stratum sand cannot enter a shaft, and the aim of preventing the stratum from producing sand is fulfilled.
Compared with the prior art, the invention has the following advantages:
the inorganic gel sand control material has wide range of applicable cementing and curing temperature, and can realize cementing and curing under the water environment condition of 20-120 ℃; the inorganic gel sand control material has the characteristics of early strength and high strength, and can be subjected to post-operation after 24-48 hours of consolidation; the inorganic gel sand control material consolidated body has higher compression resistance and better permeability, so that the inorganic gel sand control material consolidated body has good sand control performance, can resist high temperature, and can resist high temperature of 350 ℃ without damage.
The inorganic gel sand control material takes inorganic minerals as main raw materials, is easy to obtain and low in cost, has few preparation steps, and greatly saves production cost.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a diagram of a sample of an inorganic gel sand control material and consolidation according to an embodiment of the present invention, A is inorganic gel sand control material particles; b is a consolidated body.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular forms also are intended to include the plural forms unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, and/or combinations thereof.
In order to enable those skilled in the art to more clearly understand the technical scheme of the present invention, the technical scheme of the present invention will be described in detail with reference to specific embodiments.
Example 1
An inorganic gel sand control material comprises the following raw materials in percentage by mass:
60% of component A and 40% of component B.
The component A is obtained by mixing bauxite, limestone and anhydrite, grinding, sintering at 1300 ℃, crushing and screening; wherein SiO is 2 10% by mass of Al 2 O 3 60% by mass of Fe 2 O 3 1 percent by mass, 15 percent by mass of CaO and CaSO 3 The mass percentage is 10%;
the clinker after high-temperature sintering is crushed and screened to form the component A with 10-mesh granularity particles.
The component B is natural pumice particles with the particle size of 10 meshes.
The preparation method of the inorganic gel sand control material comprises the following steps:
after mixing component A and component B in proportion, stirring in a stirring cup at 500 rpm for 10 minutes.
Uniformly mixing the obtained inorganic gel sand control material with sand-carrying fluid according to the mass ratio of 50%, putting the mixture into a glass tube with phi of 2.5cm multiplied by 20cm, putting the glass tube into a constant-temperature water bath with the temperature of 30, 45 and 60 ℃ for solidification for 48 hours, taking out the glass tube, and knocking the glass tube out the solidified sand; then the compressive strength of the consolidated sand is measured, and the compressive strength of the consolidated body measured at 30, 45 and 60 ℃ is respectively more than or equal to 4Mpa, more than or equal to 6.5Mpa and more than or equal to 7.8Mpa; the permeability of the consolidated body formed under the conditions of 30, 45 and 60 ℃ is respectively more than or equal to 15, more than or equal to 35 and more than or equal to 40 darcy.
Example 2
An inorganic gel sand control material comprises the following raw materials in percentage by mass:
70% of component A and 30% of component B.
The component A is obtained by mixing bauxite, limestone and dihydrate gypsum, grinding, sintering at 1350 ℃ and crushing and screening; wherein SiO is 2 10% by mass of Al 2 O 3 65% by mass of Fe 2 O 3 2 mass percent and 10 mass percent of CaO and CaSO 3 The mass percentage is 10%.
The component A is formed by crushing and screening particles with 20 meshes of granularity after high-temperature sintering.
The component B is natural pumice particles with the particle size of 20 meshes.
The preparation method of the inorganic gel sand control material comprises the following steps:
after the component A and the component B are mixed according to the proportion, the mixture is stirred in a stirring cup for 15 minutes at the speed of 500 revolutions per minute for later use.
Uniformly mixing the obtained inorganic gel sand control material with sand-carrying fluid according to the mass ratio of 50%, putting the mixture into a glass tube with phi of 2.5cm multiplied by 20cm, putting the glass tube into a constant-temperature water bath with the temperature of 30, 45 and 60 ℃ for solidification for 48 hours, taking out the glass tube, and knocking the glass tube out the solidified sand; then, the compressive strength of the consolidated sand was measured (the compressive strength of the consolidated body measured at 30, 45, 60 ℃ C. Was 5.5MPa or more, 7.2MPa or 8.2MPa, respectively, and the permeability of the consolidated body formed at 30, 45, 60 ℃ C. Was 13 or more, 25 or more, 35 darcy or more, respectively).
Example 3
An inorganic gel sand control material comprises the following raw materials in percentage by mass:
65% of component A and 35% of component B.
The component A is obtained by mixing bauxite, limestone and dihydrate gypsum, grinding, sintering at 1400 ℃ and crushing and screening; wherein SiO is 2 15 mass percent of Al 2 O 3 60 mass percent of Fe 2 O 3 4 mass percent, 10 mass percent of CaO and CaSO 3 The mass percentage is 10%.
The component A is formed by crushing and screening particles with 15 meshes of granularity after high-temperature sintering.
The component B is natural pumice particles with the particle size of 15 meshes.
The preparation method of the inorganic gel sand control material comprises the following steps:
after the component A and the component B are mixed according to the proportion, the mixture is stirred in a stirring cup for 15 minutes at the speed of 500 revolutions per minute for later use.
Uniformly mixing the obtained inorganic gel sand control material with sand-carrying fluid according to the mass ratio of 50%, putting the mixture into a glass tube with phi of 2.5cm multiplied by 20cm, putting the glass tube into a constant-temperature water bath with the temperature of 30, 45 and 60 ℃ for solidification for 48 hours, taking out the glass tube, and knocking the glass tube out the solidified sand; then the compressive strength of the consolidated sand is measured, the compressive strength of the consolidated body measured at 30, 45 and 60 ℃ is respectively more than or equal to 5.0Mpa, more than or equal to 6.8Mpa and more than or equal to 7.8Mpa, and the permeability of the consolidated body formed at 30, 45 and 60 ℃ is respectively more than or equal to 14 darcy, more than or equal to 27 darcy and more than or equal to 40 darcy.
Example 4
An inorganic gel sand control material comprises the following raw materials in percentage by mass:
75% of component A and 25% of component B.
The component A is obtained by mixing bauxite, limestone and anhydrite, grinding, sintering at 1300 ℃, crushing and screening; wherein SiO is 2 10% by mass of Al 2 O 3 60% by mass of Fe 2 O 3 1 percent by mass, 15 percent by mass of CaO and CaSO 3 The mass percentage is 10%;
the clinker after high-temperature sintering is crushed and screened to form the component A with 10-mesh granularity particles.
The component B is natural pumice particles with the particle size of 10 meshes.
The preparation method of the inorganic gel sand control material comprises the following steps:
after mixing component A and component B in proportion, stirring in a stirring cup at 500 rpm for 10 minutes.
Uniformly mixing the obtained inorganic gel sand control material with sand-carrying fluid according to the mass ratio of 50%, putting the mixture into a glass tube with phi of 2.5cm multiplied by 20cm, putting the glass tube into a constant-temperature water bath with the temperature of 30, 45 and 60 ℃ for solidification for 48 hours, taking out the glass tube, and knocking the glass tube out the solidified sand; then the compressive strength of the consolidated sand is measured, and the compressive strength of the consolidated body measured at 30, 45 and 60 ℃ is respectively more than or equal to 4Mpa, more than or equal to 6.5Mpa and more than or equal to 7.8Mpa; the permeability of the consolidated body formed under the conditions of 30, 45 and 60 ℃ is respectively more than or equal to 15, more than or equal to 35 and more than or equal to 40 darcy.
The rock sample solidified by the inorganic gel sand control material in the embodiment 1 is tested by high-pressure mercury, the proportion of the pore distribution large pore canal is large, the pore distribution large pore canal is mainly distributed between 7 and 104 mu m and accounts for 51% of the total number of pores, the average pore radius of the group of samples is between 58.24 and 66.99 mu m, and the average pore radius of the group of samples is 62.52 mu m. From this, the group of samples has more large pore channels and more uniform pore distribution, i.e. has higher permeability and good sand prevention effect.
The inorganic gel sand control material of example 1 has strong hydrophilicity in the consolidated body formed by consolidation of the material according to the effective permeability and wettability measurement, so that the oil flowing through the consolidated body is facilitated, and the water shutoff performance is achieved.
The inorganic gel sand control material of the embodiment 1 is subjected to a rib medium corrosion resistance experiment, and the result shows that: the strength and the permeability of the rock core are not greatly influenced by stratum water and clear water; the diluted hydrochloric acid can reduce the strength of the rock core and improve the permeability; the alkali solution slightly reduces the strength of the core, but the permeability is greatly improved.
The oil extraction high-temperature high-pressure reaction kettle tests the concretion body of the inorganic gel sand control material in the embodiment 1, after 5 days at 350 ℃, the concretion body is not deformed, the tested permeability and the compression strength are greatly improved, the compression strength is reduced by about 15%, but the material has a special property, namely, the material has a certain repairing capability when the material is restored to a low-temperature water environment at a high temperature, even the restored strength exceeds the original strength, thereby laying a basic function for high-temperature sand control.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.

Claims (8)

1. An inorganic gel sand control material is characterized in that the raw materials comprise A, B two components, and the component A comprises SiO 2 、Al 2 O 3 、Fe 2 O 3 、CaO、CaSO 3 The method comprises the steps of carrying out a first treatment on the surface of the Component BThe method comprises the following steps: an inorganic raw material of the same particle size as component A.
2. The inorganic gel sand control material of claim 1 wherein component a comprises 60% to 70% of the total weight of the sand control material; the component B accounts for 30-40% of the total weight of the sand control material.
3. The inorganic gel sand control material of claim 1, wherein component A is obtained by grinding bauxite, limestone, anhydrite or dihydrate gypsum, sintering at high temperature, crushing and screening, wherein SiO 2 Mass percent is less than 15%, al 2 O 3 Mass percent is more than 60%, fe 2 O 3 Less than 10 percent of CaO, less than 50 percent of CaSO 3 The mass percentage is less than or equal to 38 percent.
4. The inorganic gel sand control material of claim 3, wherein the inorganic gel sand control material is obtained by crushing and screening after sintering at 1300-1400 ℃.
5. The inorganic gel sand control material of claim 3 or 4, wherein the component A is formed by crushing and screening particles with the granularity of 10-20 meshes after high-temperature sintering.
6. The inorganic gel sand control material of claim 1 or 2 wherein component B is 10-20 mesh natural pumice particles.
7. The method for preparing an inorganic gel sand control material according to any one of claims 1 to 6, comprising the steps of:
mixing the component A and the component B according to a certain proportion, grinding and screening the particles with the particle size of 10-55 meshes, stirring for 1-5 hours under the condition of 500-1000 rpm, and then drying at the temperature of 60-80 ℃ to obtain the composite material.
8. The method for using the inorganic gel sand control material according to any one of claims 1 to 6, which is characterized in that the inorganic gel sand control material and sand carrying fluid are injected into a target horizon according to the mass ratio of 5 to 50 percent, after solidification, an artificial well wall is established, and then the oil well is put into production after drilling and plugging.
CN202111290824.3A 2021-11-02 2021-11-02 Inorganic gel sand control material and preparation method thereof Pending CN116063051A (en)

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