高效环保型水基钻井液体系的性能评价与应用  

Performance Evaluation and Application of Efficient and Environmentally Friendly Water-Based Drilling Fluid System

作　　者：延雄[1] 黄鑫 YAN Xiong;HUANG Xin(Dingbian Oil Production Plant,Yanchang Oilfield Co.,Ltd.Yulin Shaanxi 718699,China)

机构地区：[1]延长油田股份有限公司定边采油厂,陕西榆林718699

出　　处：《当代化工》2024年第10期2325-2329,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:53304059)。

摘　　要：设计了一种高效环保型水基钻井液体系,结合化学手段优选了其降滤失剂及各单剂的加量与配比,通过实验对其热稳定、抗污染及耐盐等性能进行了评价,并进行了现场应用测试。结果表明:降滤失剂HH-8的最佳制备条件为温度60℃、单体丙烯酰胺、邻苯二甲酸酐与十二烷基苯磺酸钠质量配比5∶3∶2,引发剂质量分数为12%、pH=9。封堵剂B类的失水量响度较小,且其与磺化处理剂存在协同效应。HHC体系耐温性能、抗污染能力及抑制性能良好,其在540 min时的页岩膨胀率约为3.42%,仅为纯水体系的1/3。水基钻井液HHC体系在300μm的人工裂缝块中依然能承压5 MPa且在15 min内未发生滤失,尽管实验过程中有部分钻井液浸入岩心至1/2,但其始终未突破岩心。盐水体积分数对体系的润滑系数及黏滞系数影响甚微。25%的盐水体积分数为HHC体系的性能劣化上限。A highly efficient and environmentally friendly water-based drilling fluid system was designed,and its filtrate reducer and the dosage and ratio of each individual agent were optimized by chemical means.Its thermal stability,anti pollution,and salt resistance were evaluated through experiments,and field application tests were conducted.The results showed that the optimal preparation conditions for the filtrate reducer HH-8 were a temperature of 60℃,a mass ratio of monomer acrylamide,phthalic anhydride,and sodium dodecylbenzenesulfonate of 5:3:2,an initiator mass fraction of 12%,and pH=9.The water loss volume of the blocking agent B was relatively low,and it had a synergistic effect with the sulfonation treatment agent.The HHC system has good temperature resistance,anti pollution ability,and inhibition performance.Its shale expansion rate at 540 minutes is about 3.42%,which is only one-third of that of the pure water system.The water-based drilling fluid HHC system can still withstand a pressure of 5 MPa in a 300μm artificial fracture block without filtration within 15 minutes.Although some drilling fluid was immersed in the core to 1/2 during the experiment,it never broke through the core.The volume fraction of saltwater has little effect on the lubrication coefficient and viscosity coefficient of the system.25%saline volume fraction is the upper limit of performance degradation for the HHC system.

关 键 词：表面活性剂 化学反应 石油 回收 吸收 聚合物 

分 类 号：TQ031[化学工程] TE122.1[石油与天然气工程—油气勘探]