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Plugging agent for improving pressure bearing capacity and preparation method of plugging agent

A plugging agent and content technology, applied in chemical instruments and methods, drilling composition, sustainable waste treatment, etc., can solve the problems of low pressure bearing capacity, increased cost, unstable performance, etc. The effect of pressure capacity and rapid sealing performance

Active Publication Date: 2018-04-06
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, the above-mentioned conventional bridge plugging technology has a series of problems such as unstable performance and low pressure bearing capacity in the application of deep and ultra-deep wells. As a result, it will become more difficult to deal with accidents once malignant leakage occurs in deep and ultra-deep well drilling. , the cost is greatly increased, so finding a plugging agent suitable for malignant leakage in deep and ultra-deep wells has become an urgent problem to be solved at this stage

Method used

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  • Plugging agent for improving pressure bearing capacity and preparation method of plugging agent

Examples

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preparation example Construction

[0043] Another aspect of the present invention provides a method for preparing a plugging agent, wherein the method is to sequentially mix the water, the bridging particles, the filling particles and the cementing material under stirring conditions.

[0044] According to the preparation method of the present invention, the method comprises sequentially mixing the water, the bridging particles, the filling particles, the cementing material and the barite under stirring conditions.

[0045] According to the preparation method of this method, the stirring conditions include: the stirring rate is 7000-10000 rpm, preferably 8000-9000 rpm.

[0046] The plugging agent provided by the present invention can improve the pressure bearing capacity of the formation when drilling and plugging. Materials such as bridging particles, filling particles and barite in the suspension form a stable structure, and then intertwine in the leakage channel to form a network bridging structure, which can...

Embodiment 1

[0053] This example is used to illustrate the plugging agent of the present invention and its preparation method.

[0054] Add 100 parts by weight of clear water into the enamel measuring cup, start the stirrer to stir at a constant speed, and then add:

[0055] 4 parts by weight of quartz sand A, the particle diameter of quartz sand A is 68 microns;

[0056] 6 parts by weight of quartz sand B, the particle diameter of quartz sand B is 21 microns;

[0057] 15 parts by weight of filler particles, wherein the filler particles contain a mixture of walnut shells, shells and nuts, and the weight ratio of the amount of walnut shells, shells and nuts is 1:0.5:0.5, and the particle diameter of walnut shells, shells and nuts Respectively 8 microns, 14 microns, 16 microns;

[0058] 9 parts by weight of bio-glue fiber material mixed processed product, wherein, the bio-glue fiber material mixed processed product is processed by mixing 3 parts by weight of bio-glue and 6 parts by weight ...

Embodiment 2

[0061] This example is used to illustrate the plugging agent of the present invention and its preparation method.

[0062] Add 100 parts by weight of clear water into the enamel measuring cup, start the stirrer to stir at a constant speed, and then add:

[0063] 4 parts by weight of quartz sand A, the particle diameter of quartz sand A is 68 microns;

[0064] 6 parts by weight of quartz sand B, the particle diameter of quartz sand B is 21 microns;

[0065] 15 parts by weight of filler particles, wherein the filler particles contain a mixture of walnut shells, shells and nuts, and the weight ratio of the amount of walnut shells, shells and nuts is 1:0.5:0.5, and the particle diameter of walnut shells, shells and nuts Respectively 8 microns, 14 microns, 16 microns;

[0066] 9 parts by weight of bio-glue fiber material mixed processed product, the mixed processed product of bio-glue fiber material contains 3 parts by weight of bio-glue and 6 parts by weight of fiber material mi...

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Abstract

The invention relates to the field of oil and gas well reagents, and discloses a plugging agent for improving pressure bearing capacity and a preparation method of the plugging agent. The plugging agent contains the following materials: water, bridging particles, filling particles and a cementing material; and based on 100 parts by weight of water, the content of the bridging particles is 3-15 parts by weight, the content of the filling particles is 5-23 parts by weight, and the content of the cementing material is 4-11 parts by weight. The plugging agent provided by the invention can improvethe pressure bearing capacity of a stratum when well drilling and leakage plugging are performed, is suitable for the shielding temporary plugging technology of severe losses in drilling of ultra-deepwells, has the performance of high efficiency and rapid plugging, and is particularly suitable for severe loss conditions which happen at a stratum with a well depth of exceeding 3,000m and are difficult to treat by a conventional plugging agent.

Description

technical field [0001] The invention relates to the field of oil and gas well reagents, in particular to a plugging agent for improving pressure bearing capacity and a preparation method thereof. Background technique [0002] The technical mechanism of conventional bridge plugging to improve the pressure bearing capacity of the formation is generally to compound a variety of bridge plugging materials into plugging slurry, and use high pressure to squeeze it into the leakage position of the formation. Hanging, bridging, and filling, the formed packing layer will have greater friction with the wall of the crack or hole without being pushed away, and then use the thin, smooth, varicose and deformable sheet-like substance in the plugging slurry to fill, Then, the tension bars of plant fibers are connected in series to form a dense packing layer to achieve the purpose of plugging holes, eliminating leakage, and improving the pressure bearing capacity of the formation. Its mechan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/504C09K8/514
CPCC09K8/5045C09K8/514C09K2208/04C09K2208/08C09K2208/18C04B28/02C09K8/426Y02W30/91C04B14/06C04B14/28C04B14/368C04B14/38C04B16/06C04B18/24C04B20/008C04B24/38C04B20/0048C04B22/10C04B22/142C04B24/34C04B24/383
Inventor 罗平亚梁大川王平全邓明毅黄进军白杨
Owner SOUTHWEST PETROLEUM UNIV