Organic silicon plugging agent and preparation method thereof

A technology of silicone adhesive and plugging agent, which is applied in the field of oil and gas wells, can solve the problems of unguaranteed retention, low success rate of plugging, and easy leakage of leaky layers, etc., to achieve better plugging effect and good sealing Plugging performance, colloidal strength increase effect

Active Publication Date: 2021-07-16
BEIJING DADE GUANGYUAN PETROLEUM TECH SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing plugging agents for oil and gas wells mainly include inorganic plugging agents and organic plugging agents. Although inorganic plugging agents have good strength and strong plugging and pressure-bearing capabilities, they are easy to leak in the leaking zone. Near the oil and gas well wall, the retention cannot be guaranteed, and the success rate of plugging is not high

Method used

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  • Organic silicon plugging agent and preparation method thereof

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Effect test

Embodiment 1

[0029] Organosilicon leak-stopping agent comprises the following components in parts by weight:

[0030] 55 parts of methyl silicone resin, 25 parts of phenyl silicone resin, 10 parts of KH-CL crosslinking agent silicon nitrogen crosslinking agent, 15 parts of dibutyl phthalate, 15 parts of room temperature vulcanized silicone rubber adhesive.

[0031] The preparation method of organosilicon leak-stopping agent comprises the steps:

[0032] Step 1. Synthesis of silicone resin: use methylchlorosilane, methyltriethoxysilane and hydroxyl silicone oil as raw materials to synthesize methyl silicone resin with methyl / Si=2.0 through hydrolysis and polycondensation; use phenylchlorosilane, Phenyltriethoxysilane and hydroxy silicone oil are used as raw materials to synthesize phenyl silicone resin with phenyl / Si=2.0 through hydrolysis and condensation;

[0033] Among them, the viscosity of hydroxy silicone oil is 80-90mPa·s, the mass ratio of methyl chlorosilane and hydroxy silicone o...

Embodiment 2

[0038] Organosilicon leak-stopping agent comprises the following components in parts by weight:

[0039] 60 parts of methyl silicone resin, 25 parts of vinyl silicone resin, 10 parts of KH-CL crosslinking agent silicon nitrogen crosslinking agent, 20 parts of dioctyl phthalate, 20 parts of room temperature vulcanized silicone rubber adhesive.

[0040] The preparation method of organosilicon leak-stopping agent comprises the steps:

[0041] Step 1. Synthesis of silicone resin: use methylchlorosilane, methyltriethoxysilane and hydroxyl silicone oil as raw materials to synthesize methylsilicone resin with methyl / Si=2.0 through hydrolysis and polycondensation; use vinylchlorosilane, Vinyl triethoxysilane and hydroxy silicone oil are used as raw materials to synthesize vinyl silicone resin with vinyl / Si=2.0 through hydrolysis and polycondensation;

[0042] Among them, the viscosity of hydroxy silicone oil is 80 ~ 90mPa s, the mass ratio of methyl chlorosilane to hydroxy silicone o...

Embodiment 3

[0047] Organosilicon leak-stopping agent comprises the following components in parts by weight:

[0048] 60 parts of methyl silicone resin, 15 parts of propyl silicone resin, 6 parts of KH-CL crosslinking agent silicon nitrogen crosslinking agent, 15 parts of dibutyl phthalate, 15 parts of room temperature vulcanized silicone rubber adhesive.

[0049] The preparation method of organosilicon leak-stopping agent comprises the steps:

[0050] Step 1. Synthesis of silicone resin: use methylchlorosilane, methyltriethoxysilane and hydroxyl silicone oil as raw materials to synthesize methylsilicone resin with methyl / Si=2.0 through hydrolysis and polycondensation; use propylchlorosilane, Propyl triethoxysilane and hydroxy silicone oil are used as raw materials to synthesize propyl silicone resin with propyl / Si=2.0 through hydrolysis and polycondensation;

[0051] Among them, the viscosity of hydroxy silicone oil is 80 ~ 90mPa s, the mass ratio of methyl chlorosilane and hydroxy silic...

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Abstract

The invention discloses an organic silicon plugging agent which comprises the following components in parts by weight: 75-85 parts of silicon resin, 6-10 parts of a KH-CL cross-linking agent (a silicon-nitrogen cross-linking agent), 15-20 parts of a toughening agent and 10-20 parts of an organic silicon adhesive. The invention also discloses a preparation method of the organic silicon plugging agent, and the organic silicon plugging agent with excellent plugging performance is prepared by adopting a multi-layer compounding method. The organic silicon plugging agent provided by the invention has a special structure, good adhesiveness and good compression resistance, and is not easy to be washed away by flowing water to be lost in a leakage layer after being pumped into a well, so that the retention in a gap of the leakage layer is ensured, and therefore, the organic silicon plugging agent has good plugging performance.

Description

technical field [0001] The invention relates to the field of oil and gas wells. More specifically, the invention relates to a low-expansion organic silicon lost circulation agent used in oil and gas well operations and a preparation method thereof. Background technique [0002] Oil and gas reservoirs are mainly sedimentary rock reservoirs, and sedimentary rocks are further divided into clastic rock and carbonate rock reservoirs. Most of the reservoirs in the world's major oil and gas bearing areas are clastic rock reservoirs, which include various types of sandstone, conglomerate, conglomerate and mudstone. Clastic reservoirs are widely distributed and have good physical properties, and are the main reservoir rocks. Among them, clastic rock reservoirs are composed of complex mineral clastics, rock clastics and a certain amount of cement. The storage space is mainly the intergranular pores between the clastic particles. The arrangement, particle size and mineral compositio...

Claims

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Application Information

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IPC IPC(8): C09K8/42C09K8/44C08G77/20C08G77/06
CPCC09K8/426C09K8/44C08G77/20C08G77/06C08G77/80
Inventor 孟虎孙晓东王良超谷团宁金华李渔刚马成龙韩昊天
Owner BEIJING DADE GUANGYUAN PETROLEUM TECH SERVICE
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