A kind of plugging and anti-collapse treatment agent for shale formation and preparation method thereof

Abstract

The invention relates to a plugging and anti-collapse treatment agent for shale formations in the field of chemicals for shale formation drilling and a preparation method thereof; the plugging and anti-slump treatment agent for shale formations comprises oil-soluble resin, polyethylene Components including diol, silicone modifier, and cross-linking modifier are used as raw materials, dissolved in an organic solvent, and under the action of a catalyst, through temperature-controlled reaction, solvent recovery, and dry crushing to obtain the shale formation. Plugging and anti-slump treatment agent; the plugging and anti-slump treatment agent for shale formations has the functions of adsorption and film formation, wetting reversal, bonding and wall strengthening, etc., and at the same time uses its own size to plug and bond to bridge cracks and prevent hydration It can reduce the filtration loss of drilling fluid and improve the plugging ability of drilling fluid, which can effectively solve the problems of fluorescence and foaming of existing plugging and anti-slump materials, and effectively improve the stability of wellbore walls in shale formations. The process is simple, the production cost is low, and the product quality is stable, so it is worth popularizing and applying.

Description

technical field [0001] The invention relates to the field of chemicals for drilling wells in shale formations, and more particularly relates to a plugging and anti-collapse treatment agent for shale formations and a preparation method thereof. Background technique [0002] The commercial exploitation of shale gas resources in North America has achieved great success. The proportion of unconventional natural gas in the energy supply of North America is getting higher and higher, which basically changed the energy supply and demand structure in Canada and the United States, and also stimulated the upsurge of shale gas resource development in my country. . my country's shale gas resources are abundant and widely distributed, with broad prospects for development. However, bedding and micro-fractures are developed in shale formations, and the invasion of drilling fluid can easily cause the dispersion and peeling of shale rock mass, resulting in block loss and collapse. The size ...

AI Technical Summary

Problems solved by technology

However, polymeric alcohol plugging materials have poor temperature resistance and unstable cloud point, which affects the stability of pump pressure. There are also defects such as short residence time, fixed and uncontrollable material size, and prominent foaming problems.

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