High-water-loss curing plugging agent for plugging fissures

A technology of plugging agent and high water loss, applied in the field of plugging agent, can solve the problems of not easy to dissolve blockage by acid, high price, etc., and achieve the effect of easy blockage removal, low cost and good effect.

Active Publication Date: 2013-03-20
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] All of the above-mentioned plugging agents contain elastic expansion materials, which are all polymers, which are expensive and not easy to be dissolved by acid after plugging.

Method used

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  • High-water-loss curing plugging agent for plugging fissures

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Each component and parts by weight of forming the plugging agent:

[0032] 50 parts of main material, 9 parts of filter aid, 23 parts of curing agent, 10 parts of fiber material and 8 parts of bridging material;

[0033] Wherein, the main material is calcium oxide;

[0034] The filter aid is calcium carbonate (purchased from Lingshou Aoke Petroleum Auxiliary Co., Ltd.);

[0035] The curing agent is magnesium sulfite (purchased from Tianjin COSL Chemical Co., Ltd.);

[0036] The fibrous material is wood chips;

[0037] The bridging material consists of walnut shells (purchased from Lingshou Aoke Petroleum Auxiliary Co., Ltd.), mica (purchased from Lingshou Aoke Petroleum Auxiliary Co., Ltd.) and rubber particles (Beijing Zhongke Risheng Technology Co., Ltd., model : PF-SGL) is mixed according to the mass ratio of 3:2:2, and the walnut shell is composed of coarse walnut shell with a particle size greater than 3.35mm, medium walnut shell with a particle size of 1.68-3.3...

Embodiment 2

[0042] Components and parts by weight of the plugging agent: 60 parts of main material, 10 parts of filter aid, 15 parts of curing agent, 8 parts of fiber material and 7 parts of bridging material;

[0043] Wherein, the main material is magnesium oxide;

[0044] The filter aid is calcium carbonate (purchased from Lingshou Aoke Petroleum Auxiliary Co., Ltd.);

[0045] The curing agent is sodium sulfite (purchased from Tianjin Anqing Fine Chemical Co., Ltd.);

[0046] The fibrous material is paper scraps;

[0047] The bridging material is made by mixing walnut shells, mica and rubber particles in a mass ratio of 3:2:2. The walnut shells are composed of coarse walnut shells with a particle size greater than 3.35mm and medium walnut shells with a particle size of 1.68-3.35mm. It is mixed with fine walnut shells with a particle size of 0.38-1.68mm at a mass ratio of 1:1:1; mica is composed of medium mica with a particle size of 0.38-0.8mm and fine mica with a particle size of les...

Embodiment 3

[0053] Components and parts by weight of the plugging agent: 70 parts of main material, 10 parts of filter aid, 10 parts of curing agent, 5 parts of fiber material and 5 parts of bridging material;

[0054] Among them, the main material is alumina;

[0055] The filter aid is calcium carbonate (purchased from Lingshou Aoke Petroleum Auxiliary Co., Ltd.);

[0056] The curing agent is sodium hypophosphite (purchased from Tianjin Zhengan Chemical Trade Co., Ltd.);

[0057] The fibrous material is a mixture of wood chips and paper chips;

[0058] The bridging material is made by mixing walnut shells, mica and rubber particles in a mass ratio of 3:2:2. The walnut shells are composed of coarse walnut shells with a particle size greater than 3.35mm and medium walnut shells with a particle size of 1.68-3.35mm. It is mixed with fine walnut shells with a particle size of 0.38-1.68mm at a mass ratio of 1:1:1; mica is composed of medium mica with a particle size of 0.38-0.8mm and fine mi...

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Abstract

The invention relates to a high-water-loss curing plugging agent for plugging fissures. The high-water-loss curing plugging agent comprises the following components in parts by weight: 50-70 parts of main materials, 7-15 parts of filter aid, 10-25 parts of curing agent, 5-10 parts of fiber materials and 5-10 parts of bridging materials. The curing plugging agent has the advantages of fast plugging, good effect, high acid solubility, easiness in unplugging, low cost and less environmental pollution.

Description

technical field [0001] The invention relates to a leak-stopping agent, in particular to a high-water-loss solidified leak-stopping agent for sealing cracks. Background technique [0002] The earliest plugging material used at home and abroad is bridging plugging material, which is used in bridge plugging technology. The bridge plugging technology is well-received for its safety, economy and simple operation process, and it is widely used in the field. However, since the opening size of leaky seams in the formation cannot be accurately grasped, the leak plugging plan can only be formulated based on the limited data analysis and experience on site. There are often problems of stopping leaks after one block and repeated leaks after one cycle, resulting in huge manpower, material and financial resources. loss. Therefore, it is very necessary to explore new methods of plugging. [0003] Chinese patent 201110261289.9 relates to a high water loss, hardenable, plugging agent. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/42
Inventor 张伟申威苗海龙何瑞兵徐同台陈俊生
Owner CHINA NAT OFFSHORE OIL CORP
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