修井液用新型油溶性暂堵剂DFA的室内性能评价  

Laboratory evaluation on a new oil-soluble temporary plugging agent DFA for workover fluid

作　　者：李蔚萍 向兴金 舒福昌 胡墨杰 冼以红 

机构地区：[1]湖北汉科新技术股份有限公司

出　　处：《钻井液与完井液》2005年第2期24-25,28,共3页Drilling Fluid & Completion Fluid

摘　　要：为解决渤海湾海上油田渗透性漏失'能堵不能解'的技术难题,研制出新型油溶性暂堵剂DFA.DFA为有机低分子量化合物,不溶于水,但极易溶于煤油,在煤油中的油溶率高达99.9%,而且对原油粘度基本无影响.试验表明,在堵漏修井液(海水+(1.0%～1.2%)增粘剂DFZ+2.0%粘土稳定剂HCS)中加入3%～5%的DFA暂堵剂,流变性能满足工程泵送需要,能在渗透性砂床上形成有效封堵,堵漏层承受的最大压力达到7.0 MPa;也能自行解堵,2 h内渗透率恢复值在92%以上.To solve permeable loss problem in Bohai Gulf oilfield, a new oil-soluble temporary plugging agent DFA for workover fluid was worked out. DFA is a low molecule organic compound, with the oil solution ratio as high as 99.9%. At the same time, it plays no role in the viscosity development of crude oil. Test data showed that, when 3%~5% DFA was added into the plugging workover fluid (the formulation includes seawater, 0.1%~1.2% viscofier DFZ, 2.0%clay stabilizing agent HCS), the rheological property satisfied the engineering requirements; it sealed the permeable sands effectively with the maximum bearing pressure reaching 7.0 MPa; and the barrier broke down automatically, resulting in the permeability recovery ratio reached as high as 92% in 2 h.

关 键 词：暂堵剂 修井液 室内性能评价 原油粘度 粘土稳定剂 解堵 油溶性 新型 流变性能 增粘剂 

分 类 号：TE254[石油与天然气工程—油气井工程] TE358