Plugging agent and plugging liquid for drilling fractured leakage

A plugging agent and drilling technology, applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of long thickening time of lost circulation, long thickening time of lost circulation, poor compatibility of drilling liquid, etc. , to avoid drilling fluid pollution, reduce treatment time, and achieve good compatibility

Active Publication Date: 2020-04-10
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The first object of the present invention is to provide a plugging agent for drilling fractured loss, to solve the problems of long thickening time, poor compatibility with drilling fluid, polluted drilling fluid, and low strength of existing plugging agents
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Method used

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  • Plugging agent and plugging liquid for drilling fractured leakage
  • Plugging agent and plugging liquid for drilling fractured leakage

Examples

Experimental program
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Effect test

Embodiment 1

[0045] The lost circulation agent for drilling fracture loss in this embodiment is composed of the following components by weight: 100 parts of water slag, 20 parts of floating beads, 10 parts of silica fume, 5 parts of sodium hydroxide, and 2 parts of sodium carbonate , 2.5 parts of XJL-2, 3 parts of XJQ-2, 1 part of XJH-2, 1 part of sodium carboxymethyl cellulose, 2 parts of asbestos fiber with a length of 2 mm, 3 parts of glass fiber with a length of 6 mm, granules of water slag The diameter is 28-50 μm, the particle size of floating beads is 30-287 μm, and the particle size of micro-silicon powder is 0.312-11.197 μm.

Embodiment 2

[0047] The lost circulation agent for drilling fracture loss in this embodiment consists of the following components by weight: 100 parts of water slag, 15 parts of perlite, 15 parts of microsilica, 5 parts of sodium hydroxide, and 3 parts of sodium carbonate , 2.5 parts of XJL-2, 3 parts of XJQ-2, 1.3 parts of XJH-2, 1 part of polyacrylamide potassium salt, 3 parts of asbestos fiber with a length of 2mm, 3 parts of glass fiber with a length of 6mm, the particle size of water slag 28-50μm, the particle size of perlite is 60-400μm, and the particle size of micro-silica is 0.312-11.197μm.

Embodiment 3

[0049] The lost circulation agent for drilling fracture loss in this embodiment is composed of the following components by weight: 100 parts of water slag, 10 parts of glass microspheres, 15 parts of silica fume, 6 parts of sodium hydroxide, and 3 parts of carbonic acid Sodium, 1 part of sodium silicate, 2.5 parts of XJL-2, 3 parts of XJQ-2, 1.2 parts of XJH-2, 0.5 parts of sodium carboxymethylcellulose, 0.5 parts of potassium polyacrylamide, asbestos fibers with a length of 3 mm 2 Parts, 3 parts of glass fiber with a length of 6 mm, the particle size of water slag is 30-50 μm, the particle size of glass beads is 20-35 μm, and the particle size of micro-silica powder is 0.312-11.197 μm.

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Abstract

The invention relates to a plugging agent and plugging liquid for drilling fractured leakage. The plugging agent mainly comprises the following components in parts by weight: 100 parts of water granulated slag, 10-20 parts of a lightening admixture, 10-15 parts of silica fume, 7-10 parts of an activator, 1.5-3 parts of a fluid loss agent, 2-4 parts of a reinforcing agent, 1-2 parts of a retarder,0.5-2 parts of a tackifier and 3-6 parts of fibers. The plugging agent disclosed by the invention has the following advantages for drilling fractured leakage that the formula is simple and adjustable,the usage amount of the water granulated slag is greatly increased, pollution of solid waste to the environment is reduced, the strength is moderate compared with cement paste plugging, the plug sweeping efficiency is high, good compatibility with potassium-ammonium-based drilling fluid and silicate drilling fluid is achieved, performance changes of the drilling fluid are small, and the problem that the drilling fluid is polluted after cement paste plugging is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of drilling compositions, and in particular relates to a plugging agent and a plugging fluid for drilling fractured leakage. Background technique [0002] During the construction of oil and gas wells in the petroleum industry, complex leakage problems are generally faced. The leakage of cementing not only causes insufficient return of working fluid, but also affects the improvement of displacement efficiency, resulting in poor cementing quality, which is not conducive to the continuous drilling of oil and gas wells, and brings hidden dangers to the protection of freshwater layers and the safe implementation of oil and gas well stimulation. Well quality and faster drilling cycle, research on various cementing leak prevention and plugging technologies have attracted much attention. [0003] At present, the common leak plugging methods include bridge plug plugging, cement slurry plugging, bridge plug and cemen...

Claims

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Application Information

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IPC IPC(8): C09K8/42C09K8/03
CPCC09K8/426C09K8/03C09K2208/08C09K2208/18
Inventor 刘福韩婧张再华蒋新立宋文宇李明忠李季王亚青
Owner CHINA PETROCHEMICAL CORP
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