Green and environment-friendly drilling plugging agent and using method thereof

A technology of green environmental protection and plugging agent, applied in chemical instruments and methods, drilling composition and other directions, can solve problems such as large shrinkage of cement, water leakage, and inappropriate plugging.

Inactive Publication Date: 2021-04-23
中煤地一七三勘探队涿州有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, based on cement leakage plugging, phase separation often occurs before sealing cracks and leaking layers, and even the cement particles with a large specific gravity tend to separate from water, resulting in dehydration. In addition, due to the poor retention of cement slurry in the formation Good, often leaking into the bottom layer without sealing the leaky layer, and the cement shrinks greatly, and the surrounding water often leaks. Cement-based leak-stopping agents have poor elasticity due to rapid coagulation and low flexural strength, so they are not suitable for some dynamic joints. leak

Method used

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  • Green and environment-friendly drilling plugging agent and using method thereof
  • Green and environment-friendly drilling plugging agent and using method thereof
  • Green and environment-friendly drilling plugging agent and using method thereof

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Embodiment 1

[0024] Raw materials: 100 parts of cement, 10 parts of nano silicon oxide, 10 parts of nano calcium carbonate, 10 parts of hollow microspheres, 30 parts of elastic sponge particles, 10 parts of flexible graphite, 40 parts of asbestos fiber, 3 parts of retarder, fluid loss reducer 3 parts, 30 parts of sodium hydroxide;

[0025] Among them, the cement is 42.5 Portland cement; the pore density of elastic sponge particles is 10PPI, and the particle size is less than 5mm; the particle size of flexible graphite is 100-200 mesh; the retarder is iron chromium salt; the fluid loss reducer is carboxymethyl cellulose; The fiber is composed of short asbestos fibers of 1-5mm and long asbestos fibers of 5-10mm according to the mass ratio of 2:1.

Embodiment 2

[0027] Raw materials: 200 parts of cement, 5 parts of nano-silica, 15 parts of nano-calcium carbonate, 5 parts of hollow microspheres, 40 parts of elastic sponge particles, 5 parts of flexible graphite, 80 parts of asbestos fiber, 5 parts of retarder, fluid loss reducer 5 parts, 50 parts of sodium hydroxide;

[0028] Among them, the cement is 42.5 Portland cement; the pore density of elastic sponge particles is 10PPI, and the particle size is less than 5mm; the particle size of flexible graphite is 100-200 mesh; the retarder is iron chromium salt; the fluid loss reducer is carboxymethyl cellulose; The fiber is composed of short asbestos fibers of 1-5mm and long asbestos fibers of 5-10mm according to the mass ratio of 2:1.

Embodiment 3

[0030] Raw materials: 150 parts of cement, 8 parts of nano-silica, 12 parts of nano-calcium carbonate, 8 parts of hollow microspheres, 30 parts of elastic sponge particles, 8 parts of flexible graphite, 60 parts of asbestos fiber, 3 parts of retarder, fluid loss reducer 3 parts, 40 parts of sodium hydroxide;

[0031] Among them, the cement is 42.5 Portland cement; the pore density of elastic sponge particles is 10PPI, and the particle size is less than 5mm; the particle size of flexible graphite is 100-200 mesh; the retarder is iron chromium salt; the fluid loss reducer is carboxymethyl cellulose; The fiber is composed of short asbestos fibers of 1-5mm and long asbestos fibers of 5-10mm according to the mass ratio of 2:1.

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Abstract

The invention relates to the technical field of petroleum and natural gas, in particular to a green and environment-friendly drilling plugging agent and a using method thereof. The green and environment-friendly drilling plugging agent is prepared from cement, nano silicon oxide, nano calcium carbonate, hollow microspheres, elastic sponge particles, flexible graphite, asbestos fibers, a retarder, a fluid loss agent and sodium hydroxide; according to the inorganic gel plugging agent taking the inorganic gel material cement as the main raw material provided by the invention, a three-dimensional network structure taking a nano material as a core is generated, and meanwhile, a bridging effect is generated through the elastic sponge particles and the asbestos fibers, so that the technical problem of poor plugging effect of a cement-based material plugging agent in the prior art is solved; the plugging agent is an environment-friendly plugging agent material.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas, in particular to a green and environment-friendly drilling leak plugging agent and a using method thereof. Background technique [0002] In the process of oil drilling, hard and brittle mud shale formations and fractured formations are often encountered. Such formations are prone to block and collapse, resulting in complex accidents such as difficulty in drilling and tripping, and pipe sticking. In order to prevent solid particles from entering the formation Migration, the most direct and effective method is to add a plugging agent to the drilling fluid to seal the pores and cracks on the wellbore rock, thereby reducing or eliminating the loss of the drilling fluid to the formation. [0003] The existing drilling fluid plugging agents mainly include asphalt products, including emulsified asphalt, oxidized asphalt, natural asphalt, sulfonated asphalt, etc. These products have goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03C09K8/42C09K8/467
CPCC09K8/03C09K8/426C09K8/467C09K2208/10C09K2208/08C09K2208/18
Inventor 张滕滕孙海龙韩长明邢春华吴昊天张剑李继强马晓进
Owner 中煤地一七三勘探队涿州有限责任公司
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