Environment-friendly degradable well drilling fluid anti-collapse blocking agent and method for preparing same

Abstract

The invention relates to the technical field of petroleum well drilling fluid blocking agents, and discloses an environment-friendly degradable well drilling fluid anti-collapse blocking agent and a method for preparing the same. Raw materials for the environment-friendly degradable well drilling fluid anti-collapse blocking agent include vegetable pitch, sodium silicate, sodium hydroxide, ligniteand span-80. The method includes mixing and dissolving the vegetable pitch, the span-80 and water with one another to obtain materials A; carrying out mixed reaction on the sodium silicate, the sodium hydroxide, lignite powder and water to obtain materials B; uniformly mixing the materials A and the materials B with one another to obtain the environment-friendly degradable well drilling fluid anti-collapse blocking agent. The environment-friendly degradable well drilling fluid anti-collapse blocking agent and the method have the advantages that the environment-friendly degradable well drilling fluid anti-collapse blocking agent is low in fluorescence and good in blocking performance and is non-toxic, environmentally friendly and biodegradable as compared with the traditional petroleum pitch anti-collapse blocking agents; the raw materials for the environment-friendly degradable well drilling fluid anti-collapse blocking agent can come from extensive sources, and the method is simple and convenient and is free of byproducts or environmental pollution.

Description

technical field [0001] The invention relates to the technical field of oil drilling fluid plugging agent, and relates to an environment-friendly and degradable drilling fluid anti-collapse sealing agent and a preparation 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. The most important solution is drilling fluid Add anti-slump plugging agent. At present, the most important anti-slump and plugging agents for drilling fluids are asphalt products, including emulsified asphalt, oxidized asphalt, natural asphalt, sulfonated asphalt, etc. These products have good anti-slump and plugging effects, but have high fluorescence levels and are difficult to degrade. Exploratory wells and environmental protection applications are li...

AI Technical Summary

Problems solved by technology

[0003] The invention provides an environmentally friendly and degradable drilling fluid anti-slump plugging agent and a preparation method thereof, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of high fluorescence level and difficulty in conventional petroleum asphalt anti-slump plugging agents. Degradation, toxicity and environmental problems

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