Preparation method of thickening agent copolymerization association compound

The technology of an associate and a tackifier is applied in the field of preparation of polymers for drilling fluids, which can solve the problem of no obvious improvement in salt resistance and calcium resistance, and achieve the effects of high shear force, temperature resistance and salt resistance.
CN106608972AActive Publication Date: 2017-05-03CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2017-05-03

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Abstract

The invention discloses a preparation method of a thickening agent copolymerization association compound. The copolymerization association compound contains a structural unit A, a structural unit B and a structural unit C, the structural unit A is acrylamide, the structural unit B is amphoteric monomer N-methyldiallyl propanesulfonate (MAPS), and the structural unit C is an ion association body of the structural unit B and cationic polyamine; and based on the total amount of the copolymerization association compound, the content of the structural unit A is 10-75wt%, the total content of the amphoteric monomer is 8-55wt%, and the content of the cationic polyamine is 1-50wt%. Temperature resistance of the thickening agent prepared by the method can reach 200 DEG C, anti-NaCl concentration is saturated, and the anti-CaCl2 concentration reaches 20%; and meanwhile, excellent shale inhibition performance and filtrate loss controllability are furthermore achieved.
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Description

technical field

[0001] The invention relates to a preparation method of a polymer used in drilling fluid during petroleum drilling, in particular to a high-temperature-resistant viscosifier used in drilling fluid and a preparation method thereof. Background technique

[0002] During the drilling process, in order to ensure that the drilling fluid has a high viscosity and good rheology under low solid phase, it is usually necessary to add a viscosifier to increase the viscosity of the drilling fluid. Drilling fluid viscosifiers are all water-soluble high molecular polymers with long molecular chains. In addition to the viscosifying effect, viscosifiers often also serve as shale inhibitors (coating agents), fluid loss reducers and flow control agents. type improver, etc. Therefore, the use of viscosifiers is often beneficial to improving the rheological properties of drilling fluids, and is also beneficial to the stability of wellbore walls.

[0003] Drilling fluid viscosifi...

Claims

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