Preparation method of salt-tolerant and stable type starch-based fluid-loss-resistant agent material

A stable, starch-based technology, used in chemical instruments and methods, drilling compositions, etc., can solve problems such as poor salt tolerance and inability to meet demand, and achieve improved salt tolerance, improved filtration performance, The effect of strong thermal stability
CN108018031AInactive Publication Date: 2018-05-11李竑靓
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
李竑靓
Publication Date
2018-05-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method of a salt-tolerant and stable type starch-based fluid-loss-resistant agent material and belongs to the technical field of fluid-loss-resistant agent materials. Cationic gel is prepared from methacrylamide propyl trimethyl ammonium chloride by polymerization, electrostatic adsorption can be formed between the gel and clay through cationic groups, actingforce of electrostatic adsorption is stronger than that formed by hydrogen bonds, fast adsorption can be realized even in a saline and high-temperature system, clay particle surfaces are wrapped withthe gel, so that specific surface area and the negative charges on the surface of the clay are reduced greatly, water sensitivity of the clay is weakened, functions of stabilizing the clay, suppressing dispersion and reducing fluid loss are achieved, and the fluid loss reduction performance of the material is improved effectively.
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Description

technical field

[0001] The invention relates to a preparation method of a salt-tolerant and stable starch-based anti-fluid loss agent material, and belongs to the technical field of fluid loss control agent materials. Background technique

[0002] In recent years, with the increase of oil demand year by year, the exploration and development of oil and gas fields have gradually turned to deep formations and offshore oil and gas reservoirs with harsh environments. Therefore, various complex situations will be faced when drilling. becomes even more important. The filtration of drilling fluid refers to the process that water will enter the formation through the well wall due to the pressure difference near the well wall. When the drilling fluid is circulating, it is necessary to ensure that the fluid loss of the drilling fluid is within a reasonable range. If the fluid loss becomes too large, the formation rock will expand due to hydration, and the distance between the drill pi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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