China University of Petroleum

Taotao Luo

Guancheng Jiang

Xianzhu Wu

Yang Xuan

Junbin Chen

Wei Ouyang

Xi Wang

Lan Jun Wang

Ranran Song

Wei Ou Yang

The present invention provides a biomimetic polymer for stabilizing wellbore, a method for preparation of the biomimetic polymer, and a drilling fluid. The polymer contains carboxymethyl chitosan that serves as a backbone and dopamine-derived groups grafted on the backbone. The polymer provided in the present invention can improve the strength of shale in the wellbore, seal the shale pores and reduce the filter loss of drilling fluid, and thereby attains an effect of stabilizing the wellbore in shale formation in drilling process.

Biomimetic polymer for stabilizing wellbore and method for preparation of the same and drilling fluid

Method for preparation of biomimetic polymer for stabilizing wellbore and drilling fluid

The present subject matter relates to an amphiphilic reservoir protecting agent, including structural units denoted by the following formula (1), (2), (3) and (4). The present subject matter further provides a method for preparation of an amphiphilic reservoir protecting agent. The present subject matter further provides a drilling fluid that contains the amphiphilic reservoir protecting agent. The amphiphilic reservoir protecting agent and drilling fluid obtained in the present subject matter have high reservoir protection property and high shale inhibition property. 

Amphiphilic reservoir protecting agent and preparation method thereof and drilling fluid

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Chengdu, China

Taotao Luo