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A kind of acid pressure temporary plugging agent and its application

A technology of temporary plugging agent and acid fracturing, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of less application, and achieve the effect of increasing the discharge volume, improving the reconstruction volume, and good compatibility

Active Publication Date: 2021-10-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the degradable fiber temporary plugging agent has achieved good temporary plugging effect in acidizing reservoirs with strong heterogeneity and natural fractures, it is mostly used in drilling and fracturing construction. fewer applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This implementation is used to illustrate the acid pressure temporary plugging agent of the present invention.

[0032] The formula of the acid fracturing temporary plugging agent includes: 1.0% temporary plugging fiber, 0.1% non-expandable temporary plugging ball A, 0.1% expansion type temporary plugging ball B, 0.3% ceramsite (30-50 mesh), 0.05% sodium dodecylsulfonate, and the balance is hydrochloric acid of 20% mass concentration. Mix the raw materials of the above formula and stir evenly to obtain the temporary plugging agent for acid fracturing.

Embodiment 2

[0034] This implementation is used to illustrate the acid pressure temporary plugging agent of the present invention.

[0035] The formula of the acid pressure temporary plugging agent includes: 2.0% temporary plugging fiber, 0.5% non-expandable temporary plugging ball A, 0.3% expansion type temporary plugging ball B, 0.5% ceramsite (30-50 mesh), 0.05% OP-10, the balance is hydrochloric acid with 10% mass concentration. Mix the raw materials of the above formula and stir evenly to obtain the temporary plugging agent for acid fracturing.

Embodiment 3

[0037] This implementation is used to illustrate the acid pressure temporary plugging agent of the present invention.

[0038] The formula of the acid pressure temporary plugging agent includes: 0.5% temporary plugging fiber, 0.05% non-expandable temporary plugging ball A, 0.1% expansion type temporary plugging ball B, 0.1% ceramsite (30-50 mesh), 0.05% SP-80, the balance is hydrochloric acid with 20% mass concentration. Mix the raw materials of the above formula and stir evenly to obtain the temporary plugging agent for acid fracturing.

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Abstract

The invention belongs to the field of petroleum development, and specifically provides an acid pressure temporary plugging agent and application thereof. The formula of the acid fracturing temporary plugging agent includes: 0.1-3% of temporary plugging fiber, 0.05-3% of non-expandable temporary plugging ball A, 0.1-3% of expansive temporary plugging ball B, and 0.1-1% of support sand in terms of weight percentage. %, dispersant 0.05-1%, and the balance is carrier liquid. The acid fracturing temporary plugging agent has good compatibility with formation fluid, good chemical stability, high plugging rate, and complete dissolution, and is suitable for high-temperature carbonate reservoirs.

Description

technical field [0001] The invention belongs to the field of petroleum development, and in particular relates to an acid-fracturing temporary plugging agent and its application in high-temperature carbonate rock reservoirs. Background technique [0002] Acid fracturing technology is one of the leading technologies for increasing production and stabilizing production of carbonate reservoir development wells. Among them, acid fracturing temporary plugging technology is to inject acid liquid and degradable (dissolving) temporary plugging agent into the reservoir in general. Through the temporary plugging of the high-permeability layer in the reservoir, the high-permeability layer is used as the main means to reduce the permeability of the high-permeability layer, increase the seepage resistance of the high-permeability layer, and allow the acid solution to enter the middle and low-permeability layer. The post-temporary plugging material can be fully degraded or dissolved withou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508
CPCC09K8/508C09K2208/08
Inventor 崔佳张汝生林鑫张锁兵苏建政赵梦云史爱萍王连生唐萍
Owner CHINA PETROLEUM & CHEM CORP
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