陇东油区水基钻井液压滤废液循环利用技术  

Hydraulic Filtrate Waste Recycling Technology for Water-Based Drilling Fluids in Longdong Oil Block

作　　者：邵斌 罗平亚[2,3] 兰军 刘鹭[2,4] 常军利 杨震 SHAO Bin;LUO Pingya;LAN Jun;LIU Lu;CHANG Junli;YANG Zhen(Changqing Industrial Group Co.,Ltd.,Xi'an 430048,Shaanxi,China;Petroleum Engineering School,Southwest Petroleum University,Chengdu 610500,Sichuan,China;State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,Sichuan,China;National Engineering Research Center of Oil&Gas Drilling and Completion Technology,Chengdu 610500,Sichuan,China)

机构地区：[1]长庆实业集团有限公司,陕西西安430048 [2]西南石油大学石油与天然气工程学院,四川成都610500 [3]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [4]油气钻完井技术国家工程研究中心,四川成都610500

出　　处：《新疆石油天然气》2025年第1期24-31,共8页Xinjiang Oil & Gas

基　　金：国家重点研发计划课题“井筒稳定性闭环响应机制与智能调控方法”(2019YFA0708303);国家自然科学基金联合基金项目“深层页岩气水平井井壁岩石结构强化及调控机理研究”(U23A2026);四川省科技计划项目苗子工程项目“深层页岩气油基钻井液刺激逆转控制及机理研究”(2025JDRC0076)。

摘　　要：陇东油区要求全面落实钻井液不落地技术,促进钻井废液循环利用。针对钻井现场压滤废液再利用配制水基钻井液性能不达标及影响因素不明确的问题,利用乙二胺四乙酸(EDTA)滴定法、细菌平皿计数法和原子吸收光谱法(AAS)开展了提高压滤废液重复利用率关键技术研究。通过实验明确了钙镁离子、细菌和重金属含量高为导致压滤废液配制水基钻井液性能差的主要原因。研发了改性聚凝沉淀型络合剂Ⅱ、聚醚类破乳剂JX和絮凝剂ZY-Ⅰ、ZY-Ⅱ,结合杀菌剂完成絮凝沉淀杀菌处理,钙镁离子去除率平均达95.5%,腐生菌(TGB)杀菌率达96.54%,硫酸盐还原菌(SRB)杀菌率达100%,重金属含量小于2.31μg/L。完成陇东油区6口井压滤废液循环利用及配制水基钻井液室内实验。形成陇东油区压滤废液循环利用新技术,该技术在陇东油区5口井进行现场应用,压滤废液循环利用配制水基钻井液性能符合工程设计要求,保障钻进顺利进行,有效保护了环境节约了水资源,应用和推广前景较好。Longdong Oil Block requires the full implementation of drilling fluid non-landing technology to promote the recycling of waste drilling fluid.In order to solve the problem that the performance of water-based drilling fluids prepared using on-site hydraulic filtrate waste cannot meet the standards and the influencing factors are not clear,the ethylene diamine tetraacetic acid(EDTA)titration,bacterial plate counting method and atomic absorption spectrometry(AAS)were used to investigate the key techniques to improve the reuse rate of hydraulic filtrate waste.The experiments show that the high content of calcium and magnesium ions,bacteria,and heavy metals are the main reasons for the poor performance of water-based drilling fluids prepared using hydraulic filtrate waste.Correspondingly,the modified coagulation and precipitation complexing agent II,polyether demulsifier JX,and flocculants ZY-I,ZYII have been developed to perform the flocculation-precipitation-sterilization treatment together with the sterilizing agent.The resultant average removal rate of calcium and magnesium ions is 95.5%,the sterilization rates of saprophytic bacteria(TGB)and sulfatereducing bacteria(SRB)are 96.54%and 100%respectively,and the heavy metal content is less than 2.31μg/L.The laboratory tests of recycling of hydraulic filtrate waste and water-based drilling fluid preparation have been completed for 6 wells in Longdong Oil Block.Longdong Oil Block waste drilling fluid hydraulic filtrate recycling technology has been formed and applied in 5 wells of this block.The waterbased drilling fluids prepared using the recycled hydraulic filtrate waste presents a performance in line with the drilling engineering design requirements,facilitating the smooth drilling process,effectively protecting the environment and saved water resources,demonstrating good prospects for application promotion.

关 键 词：钻井废液 压滤液 絮凝 循环利用 鄂尔多斯盆地 

分 类 号：TE254[石油与天然气工程—油气井工程]