钻井液与完井液2023，Vol.40Issue(5)：622-628,7.DOI:10.12358/j.issn.1001-5620.2023.05.011
高密度废弃水基钻井液电破胶条件的响应曲面法
Using RSM to Determine Electric Gel Breaking Conditions for Waste High Density Water Based Drilling Fluids
摘要
Abstract
As oil and gas wells are drilled deeper and deeper,higher formation pressures need to be balanced with high density drilling fluids,and this leads to another problems:the treatment of more and more high density waste muds.Waste muds are generally treated with chemical flocculants and problems such as high treatment cost,poor universality and potential secondary pollution are the norm.In a study an electric field was applied to treat a high density waste mud.Based on the results of a single-factor experiment,the effects of three factors,i.e.,current intensity,time of gel breaking and the distance between two electrodes,as well as the interaction of the three factors on the Zeta potential and particle size distribution of the drilling fluid were studied using response surface methodology(RSM).It was found that an optimum gel breaking can be obtained when the electric current intensity = 8 A,the time of gel breaking = 10 min,and the distance between two electrodes = 3 cm.After gel breaking,the Zeta potential of the drilling fluid was increased by 38.29%,reaching-26.2 mV,and the particle size distribution factor D90 reached 562.5 μm,indicating that the gel stability of the waste drilling fluid was broken,and this provided a powerful support to the subsequent recovery of the useful mud components as well as the treatment of the waste portion of the waste drilling fluid.关键词
水基钻井液/电破胶/Zeta电位/粒径分布Key words
Water based drilling fluid/Electric gel breaking/Zeta potential/Particle size distribution分类
能源科技引用本文复制引用
王潇辉,王旭东,姜春丽,师浩林,薛迦文,徐加放..高密度废弃水基钻井液电破胶条件的响应曲面法[J].钻井液与完井液,2023,40(5):622-628,7.基金项目
中石化胜利工程公司"高密度钻井液电场破胶与重晶石回收方法研究"项目(SKG2111) （SKG2111）
中石油集团公司关键核心技术重大科技攻关项目"抗温240℃以上的环保井筒工作液新材料"联合资助(2020A-3913). （2020A-3913）
