CN113307586A - Preparation and application method of inorganic gelled oil-water well plugging material - Google Patents
Preparation and application method of inorganic gelled oil-water well plugging material Download PDFInfo
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- CN113307586A CN113307586A CN202110671269.2A CN202110671269A CN113307586A CN 113307586 A CN113307586 A CN 113307586A CN 202110671269 A CN202110671269 A CN 202110671269A CN 113307586 A CN113307586 A CN 113307586A
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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
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- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00293—Materials impermeable to liquids
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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
- 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
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
- C04B2111/00706—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like around pipelines or the like
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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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
- 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
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to the field of oil and gas field development, and relates to a preparation and application method of an inorganic gelled oil-water well plugging material, which is a gelled material system formed by mixing inorganic powder, external addition materials with the same powder and a certain additive: the main material is the main mineral SiO2、Al2O3、Fe2O3、CaO, and SO3The main component is prepared by high-temperature firing, the auxiliary material is high-strength powdery granular material with the density similar to that of the main component and certain activity after being ground and processed into proper grain size, and the auxiliary material is mixed to form a plugging agent material system. The plugging agent material is carried by water and extruded into a stratum of a leakage part, and can form a plugging agent with higher compressive strength and certain impermeability by two processes of hydration reaction and cementing hardening in a water environmentThe artificial rock body with the property and the bonding strength achieves the purposes of plugging the waste layer and blocking formation sand and fluid outside the casing from flowing into a shaft by the leakage hole, thereby ensuring the normal production of the oil-water well.
Description
Technical Field
The invention relates to an inorganic gelled leaking stoppage material, in particular to an inorganic powdery gelled material.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
In the development process of foreign oil and gas fields, generally, oil well cement or modified oil well cement is adopted to perform leaking stoppage aiming at the problem of casing leakage of old oil and water wells, and the success rate is low and is between 1/5 and 1/2 due to the defect of the self-gelling property; there are also cases of using organic resin materials for plugging, which have the advantage of high bonding strength, but have the disadvantages of difficult operation and great accident-oil-water well abandonment caused by operation error.
In domestic oil and gas fields, particularly old oil and gas fields in the later development period of high water content, the phenomena of casing damage, casing breakage and casing leakage frequently occur due to the long service period of an oil-water well, so that normal production is seriously influenced and great economic loss is caused. For the serious casing damage and casing breakage problem, casing replacement or casing patching operation is generally adopted, and the cost is relatively high. For the problems of casing leakage and waste layer plugging, oil well cement is generally adopted for plugging, and the problem of low success rate also exists.
The development of a high-efficiency inorganic chemical plugging agent system is carried out, so that the normal production of oil-gas fields is ensured, and the economic benefit of petroleum enterprises is improved.
Disclosure of Invention
In order to overcome the problems, the invention provides an inorganic gelling plugging material with a wider temperature range and a preparation method thereof.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
in a first aspect of the present invention, there is provided an inorganic gelled oil-water well plugging material comprising: the component A is an inorganic gelling system consisting of aluminate, sulphoaluminate and silicate, and the component B is natural volcanic rock.
The inorganic cementing material is mainly divided into an air-setting system and a water-setting system, but the air-setting system is not suitable for the characteristics of the petroleum industry, so that the water-setting system is required to be selected, and the characteristics of early strength, high strength and high temperature resistance are required to be selected in consideration of the performance requirements, so that the inorganic cementing system such as aluminate, sulphoaluminate and silicate with the functions is determined to be preferred as a main research object; on the other hand, the strength, impermeability and low density of the consolidated body and the adhesion to other solid surfaces are the main index parameters, so that high-performance auxiliary materials capable of effectively adjusting the parameters have to be studied in depth, and the invention better solves the problem in the aspect.
The invention relates to a preparation process of a plugging material, which comprises the following steps: 1) preparing raw material components; 2) firing high-temperature clinker; 3) grinding and screening; 4) and (5) optimizing the proportion of main materials and auxiliary materials.
The invention relates to an inorganic gelled leaking stoppage material, in particular to an inorganic powdery gelled material.
The material is a gelled material system which is formed by mixing inorganic powder with external charging material of the same powder and adding a certain additive according to a certain proportion: wherein the main material is SiO which is a main mineral2、Al2O3、Fe2O3、CaO, and SO3The main component is prepared by high-temperature firing, the auxiliary material is a high-strength powdery granular material which has a density similar to that of the main component and certain activity and is selected and ground into a proper grain size, and the two materials are mixed according to a certain proportion to form a plugging agent material system. The plugging agent material is squeezed into a stratum of a leakage part by water, and a low-density artificial rock body with higher compressive strength and certain impermeability and bonding strength can be formed by two processes of hydration reaction and cementing hardening under a water environment, so that the aim of plugging a waste layer and a leakage hole to prevent stratum sand and fluid outside a casing from flowing into a shaft is fulfilled, and the normal production of an oil-water well is guaranteed.
It should be noted that, the research of the present application finds: compared with other high-strength powdery particle materials, the natural volcanic rock has low density, can be well fused with the main materials, does not generate rejection, and simultaneously, the formed artificial rock has high compressive strength, good impermeability and good bonding strength.
The main hydration reactions are:
3CaO·3Al2O3·CaSO4+2(CaSO4·2H2O)+34H2O
3CaO·Al2O3·3CaSO4·32H2O +2(Al2O3·3H2O)(gel)
2CaO·SiO2+2H2O
CaO-SiO2-H2O(Ⅰ)+ Ca(OH)2
and (3) setting and hardening processes: hydration develops from the surface of the particles to the depth, colloidal particles increase rapidly from the particles into the water, and crystals begin to interconnect, gradually flocculating into a gel structure. Impurities which are not hydrated in the particles, cementing particles which do not enter water and added aggregates form an artificial rock stratum framework together; the gel is filled in the contact part of the skeleton to be primarily solidified.
The hydration process is further developed, and then 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 crystals are gradually hardened into a micro-crystal structure and a cement solid cementing body with higher impermeability is contained, and the purposes of effectively plugging a waste layer and leaking holes are achieved.
The plugging mechanism is as follows: the inorganic powdery cementing material is stirred into slurry by using water with a certain proportion and an additive for adjusting the solidification performance, the slurry is pumped into a leakage section for plugging a stratum or a shaft, the slurry is hydrated and consolidated into a whole in a water environment to form an artificial concrete rock stratum with certain strength, impermeability and bonding strength.
The second aspect of the invention provides a preparation method of an inorganic gelled oil-water well plugging material, which comprises the following steps:
uniformly mixing the component A and the component B to form a plugging agent material system;
and (3) uniformly mixing the plugging agent material system and the additive, adding water, and uniformly mixing to obtain the inorganic gelled oil-water well plugging material.
(1) The pore structure analysis is carried out by utilizing a rock sample consolidated by a 100-mesh material system, and the method is characterized in that: the total porosity is low (less than 15 percent); secondly, the average pore diameter is small, most of the pores have the pore diameter smaller than 30nm, and pores with the diameter of about 1.8nm account for a large proportion; the shape of the hole is mostly the ink bottle hole, and the structure of the hole is the key for forming the excellent performances of the solidified body of the material system, such as impermeability, corrosion resistance, dry shrinkage and the like.
(2) Through the determination of wettability, the consolidation body formed by the consolidation of the material has strong hydrophilicity, so the material has certain water plugging performance.
(3) The results of the medium corrosion resistance experiment show that: the formation water and the clear water have no great influence on the strength of the rock core; the strength of the core is slightly reduced by dilute hydrochloric acid, and the strength of the core is slightly reduced by strong alkaline solution.
(4) Through the test of the high-temperature high-pressure reaction kettle on the consolidated body, after 5 days at 350 ℃, the consolidated body is not greatly deformed in integral installation, and the compressive strength is reduced by about 15%, but the material also has a special property, namely although the strength is reduced at high temperature, if the material is restored to a low-temperature water environment, the material has certain restoration capability, and even the restored strength exceeds the original strength, a basic function is established for high-temperature application.
(5) The plugging agent is filled into a steel pipe, consolidated and split, and then the bonding strength between the plugging agent and the pipe wall is checked to be good, as shown in figure 2. In a third aspect of the invention, the application of any one of the inorganic gelled oil-water well plugging materials in oil-gas field development is provided.
The invention has the beneficial effects that:
(1) the cementing curing can be realized in the water environment from the normal temperature to 120 ℃;
(2) the early strength and high strength concrete has the characteristics of early strength and high strength, the initial setting is adjustable within 60-180 minutes, the final setting is adjustable within 120-240 minutes, and the subsequent operation can be carried out after the concrete is solidified for 24-48 hours generally;
(3) the consolidation body has the compression resistance of over 30Mpa, and the formed consolidation body has the characteristics of low porosity and small pore diameter, so that the material has higher impermeability.
(4) The consolidation body can resist the high temperature of 300 ℃ without being damaged; the bulk density of the inorganic gelled oil-water well plugging material is 1.2-1.3g/cm3The specific gravity of the mixed mortar is adjustable within 1.4-1.6.
(5) The performance of the material can be further adjusted by a certain additive, so that the application range is expanded.
(6) The operation method is simple, low in cost, universal and easy for large-scale production.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 shows the inorganic gel plugging agent material and its consolidation body.
FIG. 2 is a schematic view of the bonding cut surface of the inorganic cement of the present invention to a steel pipe.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. 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 invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and 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, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
An inorganic plugging material comprises A, B two components, wherein the component A is: inorganic gelling systems such as aluminates, sulphoaluminates and silicates; the component B is as follows: adding the same powdery inorganic material outside.
In some embodiments, component a comprises 40% to 60% of the total mass fraction; the component B is composed of natural volcanic rock which is ground into proper particle size and accounts for 40-60 percent of the total mass fraction.
In some embodiments, the component a is SiO2、Al2O3、Fe2O3、CaO、SO3The basic minerals are mixed according to a certain proportion (SiO)2＜8.5%，Al2O3＞60%，Fe2O3=2~6%，CaO＜20%，SO3Grinding 10-20% of the powder, mixing, and sintering at high temperature (1350 +/-50 ℃)Grinding the clinker sintered at high temperature to form a powdery system with the grain diameter of 3-80 mu m to form a component A, wherein the component A accounts for 40-60% of the total mass fraction; the component B is formed by grinding natural volcanic rock into the same powdery system, and the mass ratio is 40-60%.
In some embodiments, one or more of the aluminate, thioaluminate, and silicate salts; the inorganic external charging material with the same grain diameter is inorganic low-activity powdery material with the density close to the density of A.
In some embodiments, component a employs sulfoaluminate clinker, the mineral composition of which belongs to different systems and thus has its own unique mineral species and match. Compared with other clinkers, the sulphoaluminate clinker has less CaO content and lower temperature for forming main minerals. SiO in sulphoaluminate clinker, in contrast to aluminates2The allowable content of (A) is larger, thereby enlarging the range of raw materials. Waste bauxite and pyrite slag can be utilized.
In some embodiments, component a is prepared by the process of: SiO basic mineral2、Al2O3、Fe2O3、CaO、SO3Grinding and mixing the raw materials according to a certain proportion, firing the mixture at a high temperature of 1350 +/-50 ℃ by using bituminous coal as fuel through a rotary kiln, grinding the fired clinker to form a component A,
in some embodiments, the component A and the component B are uniformly mixed according to a certain mass ratio to form a basic plugging agent material system, the plugging agent can be used for casing pipe plugging construction of an oil-water well under the regulation of a certain additive and water-cement ratio, the curing temperature in the oil-water well is 30-120 ℃, and the consolidation time is 24-48 hours. The inorganic cementing plugging material for the oil field is obtained.
The main implementation method of the inorganic gelled plugging material comprises the following steps:
(1) firstly, clear water or local sewage is used for preparing mixed slurry by using an additive.
(2) Injecting the plugging material into a target layer according to a certain water-cement ratio by a pump truck, and reserving a proper plugging surface;
(3) and a certain waiting time is given by the self-performance of the material, and the oil-water well can be put into production after the artificial well wall is established and the plug is drilled.
(4) Because the adaptive temperature range is wide, the solidification time is reasonably controlled for different formation temperatures, or the solidification time is adjusted by a certain additive, so that a good plugging effect is achieved.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
In the following examples, the compressive strength: the test is carried out by adopting the national standard GB/T10238-.
The permeability is measured by a QTS-2 gas permeability tester.
The component A adopts high-iron sulphoaluminate clinker, the component B is natural volcanic rock, and the specific indexes are as follows:
table 1 chemical composition table of high-iron sulphoaluminate clinker:
table 2 mineral composition table of high iron sulphoaluminates:
example 1:
mixing the component A and the component B according to a ratio of 1:5, processing the mixture into a finished product with 80-120 meshes by a grinding and powder selecting machine, stirring the mixture for 10 minutes under the condition of a rotating speed of 200 revolutions per minute, then drying the mixture at 80 ℃ to obtain an inorganic gelling plugging material, uniformly mixing the inorganic gelling plugging material and hydroxypropyl trimethyl ammonium chloride powder according to a mass ratio of 1000:5, adding water into a glass tube with the diameter of 2.5cm multiplied by 20cm, setting the glass tube in a constant-temperature water bath with the water-cement ratio of 0.8 at 30, 45 and 60 ℃ for consolidation for 48 hours, taking out the consolidated sand, and breaking the glass tube to take out the consolidated sand; the compressive strength, permeability and bulk density of the consolidated sand were then determined.
The experimental results of the above examples are shown in table 3,
TABLE 3 compressive Strength and Permeability of consolidated sands prepared at different temperatures
The bulk density of the inorganic gelled oil-water well plugging material prepared under the experiments (30, 45 and 60 ℃) is 1.2 to 1.3g/cm3The specific gravity of the mixed mortar is adjustable between 1.4 and 1.6.
And (3) testing the bonding property: after the inorganic gel plugging agent prepared at 40 ℃ in the embodiment is filled into a steel pipe with d =2.5cm for consolidation and splitting, as shown in fig. 2, the bonding strength of the gel plugging agent is good, and the gel plugging agent cannot fall off in the pressing process.
Example 2
Mixing the component A and the component B according to a ratio of 1:5, processing the mixture into a finished product with 80-120 meshes by a grinding and powder selecting machine, stirring the mixture for 10 minutes under the condition of a rotating speed of 200 revolutions per minute, then drying the mixture at 80 ℃ to obtain the inorganic gelling plugging material, uniformly mixing the material and hydroxypropyl trimethyl ammonium chloride powder according to a mass ratio of 1000:5, adding water into a glass tube with the diameter of 2.5cm multiplied by 20cm, and placing the glass tube with the water-cement ratio of 0.6 in a constant-temperature water bath with the temperature of 30, 45 and 60 ℃ for consolidation for 48 hours, and then taking out the glass tube.
Example 3
Mixing the component A and the component B according to a ratio of 1:5, processing the mixture into a finished product with 80-120 meshes by a grinding and powder selecting machine, stirring the mixture for 10 minutes under the condition of a rotating speed of 200 revolutions per minute, then drying the mixture at 80 ℃ to obtain the inorganic gelling plugging material, uniformly mixing the material and hydroxypropyl trimethyl ammonium chloride powder according to a mass ratio of 1000:5, adding water into a glass tube with the diameter of 2.5cm multiplied by 20cm, placing the glass tube with the water-cement ratio of 1.0 in a constant-temperature water bath with the temperature of 30, 45 and 60 ℃ for consolidation for 48 hours, and taking out the product.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the foregoing embodiments, or equivalents thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An inorganic gelled oil-water well plugging material is characterized by comprising: the component A is an inorganic gelling system consisting of aluminate, sulphoaluminate and silicate, and the component B is natural volcanic rock.
2. The inorganic gelling oil-water well plugging material of claim 1, wherein the inorganic gelling system comprises SiO2、Al2O3、Fe2O3、CaO、SO3The mineral is ground, sintered and ground again.
3. The inorganic gelling oil-water well plugging material as claimed in claim 2, wherein in the A component, SiO is2＜8.5%，Al2O3＞60%，Fe2O3=2~6%，CaO＜20%，SO3＝10~20%。
4. The inorganic gelled oil-water well plugging material of claim 2, wherein the sintering temperature is 1300 ℃ to 1400 ℃.
5. The inorganic gelling oil-water well plugging material as claimed in claim 1, wherein the mass ratio of the component A to the component B is 4-6: 4-6.
6. The inorganic gelling oil-water well plugging material as claimed in claim 1, wherein the particle size range of the component A and the component B is 3 to 80 μm.
7. The inorganic gelling oil-water well plugging material as claimed in claim 1, wherein the raw materials of the inorganic gelling oil-water well plugging material further comprise additives and water.
8. The preparation method of the inorganic gelled oil-water well plugging material is characterized by comprising the following steps:
uniformly mixing the component A and the component B to form a plugging agent material system;
and (3) uniformly mixing the plugging agent material system and the additive, adding water, and uniformly mixing to obtain the inorganic gelled oil-water well plugging material.
9. The method for preparing the inorganic gelling oil-water well plugging material as claimed in claim 8, wherein the mass ratio of the plugging agent material system to the additive is 200: 1 to 2.
10. Use of the inorganic gelled oil-water well plugging material of any one of claims 1 to 7 in oil and gas field development.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115960585A (en) * | 2022-11-08 | 2023-04-14 | 中石大蓝天(青岛)石油技术有限公司 | Sand-seal channeling-prevention plugging agent and method for nano inorganic composite cementing material |
| CN116063051A (en) * | 2021-11-02 | 2023-05-05 | 中国石油化工股份有限公司 | Inorganic gel sand control material and preparation method thereof |
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2021
- 2021-06-17 CN CN202110671269.2A patent/CN113307586A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116063051A (en) * | 2021-11-02 | 2023-05-05 | 中国石油化工股份有限公司 | Inorganic gel sand control material and preparation method thereof |
| CN115960585A (en) * | 2022-11-08 | 2023-04-14 | 中石大蓝天(青岛)石油技术有限公司 | Sand-seal channeling-prevention plugging agent and method for nano inorganic composite cementing material |
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