A Polymer-based Drilling Fluid with High Temperature, Salt and Calcium Resistance Property

4th International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Dai, Zhiwen^1 ; Sun, Jinsheng^1 ; Wang, Yan^1

Department of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong

266580, China^1

关键词: Drilling fluid systems;    Filtration experiments;    Filtration loss;    High temperature;    Resistance properties;    Salt resistance;    Saturated salts;    Temperature resistances;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/237/5/052058/pdf
DOI  :  10.1088/1755-1315/237/5/052058

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Filtrate reducer is facing higher requirements and challenges in temperature and salt resistance. A novel polymer filtrate reducer was synthesized by free radical polymerization in aqueous solution. By filtration experiments, the results show that the polymer has good filtration loss performance under high temperature and saturated salt. Through the optimization with filtrate reducer and inhibitor, the optimum components of drilling fluids are water, 4.0wt% bentonite, 0.3wt% Na2CO3, 2.0wt% DAADS, 3.0wt% SMP-II, 3.0wt% SPNH, 3.0wt% SMC, 1.0wt% SDJA and 2.0wt% RH-3. The drilling fluid system has temperature resistance up to 220°C, salt resistance to saturation and calcium resistance up to 1.0%. The API fluid loss of the drilling fluids with the addition of saturated NaCl and 1wt% CaCl2 respectively after aging at 220°C was 6.0 mL and 4.4 mL.