一种环保非水基钻井液体系的构建及其性能评价  

Preparation and Performance Evaluation of an Environmental Protection Non-water Based Drilling Fluid System

作　　者：刘雪婧[1,2] 耿铁 刘卫丽[1,2] 陈翔宇 郭志娟[1,2] LIU Xuejing;GENG Tie;LIUWeili;CHEN Xiangyu;GUO Zhijuan(China Oilfield Services Limited,Langfang,Hebei 065201,P R of China;CNOOC Key Laboratory of Offshore Drilling Fluids and Cementing,Langfang,Hebei 065201,P R of China)

机构地区：[1]中海油田服务股份有限公司,河北廊坊065201 [2]中国海洋石油集团有限公司海上钻完井液与固井重点实验室,河北廊坊065201

出　　处：《油田化学》2023年第4期571-577,共7页Oilfield Chemistry

摘　　要：为满足日益严苛的环保要求,通过测试乳化剂、内相盐、基液等的生物毒性及降解性,研究植物油酸及其酯类衍生物类乳化剂BIO-EMUL与BIO-COAT复配乳化剂溶液与BIO-OIL形成的油包水乳液的电稳定性、乳化效率以及BIO-EMUL与BIO-COAT复配乳化剂溶液与BIO-OIL间的界面张力和界面流变性,以BIO-EMUL和BIO-COAT为基础,结合基液BIO-OIL以及乙酸钠溶液,构建了一种环保非水基钻井液体系,并研究了该钻井液的基本性能和抗污染能力。结果表明,BIO-EMUL、BIO-COAT能有效降低油/水界面张力,形成破乳电压达350V,乳化效率达95%的油包水乳液。该体系的LC_(50)为28 200 mg/L,BOD_(5)/COD_(Cr)>0.25,是生物毒性低,降解性良好的环境友好型油包水乳液。配制的钻井液体系适用密度范围广,抗污染能力强,为今后环保非基钻井液体系及材料的研究提供了基础。In order to satisfy the increasingly stringent requirements for environmental protection,the biological toxicity and degradability of several emulsifiers,internal phase salts and base fluids were tested,and then an environment-friendly non-water-based drilling fluid system was constructed on the basis of plant oleic acid and its ester derivative BIO-EMUL and BIO-COAT,combining with base fluid BIO-OIL and sodium acetate solution by measuring the electrical stability,emulsifying efficiency of water-in oil emulsion and oil/water interfacial tension,interfacial rheology between BIO-EMUL+BIO-COAT solutions and BIO-OIL.The fundamental performance and anti-contamination ability of the drilling fluid was evaluation.The results showed that BIO-EMUL and BIO-COAT could effectively reduce the interfacial tension of oil/water and form water-in-oil emulsions with demulsification voltage up to 350 V and emulsifying efficiency up to 95%.The LC_(50) of the water-in-oil emulsion system was about 28200 mg/L,and the BOD_(5)/COD_(Cr) was greater than 0.25,indicating that it was an environment-friendly system with low biological toxicity and good degradability.The prepared drilling fluid system had a wide range of applicable density and strong anti-contamiation ability,which provided a foundation for the future study of environmental protection non-water-based drilling fluid system and materials.

关 键 词：环保 降解 油包水乳液 非水基钻井液 

分 类 号：TE254[石油与天然气工程—油气井工程]