高密度甲酸盐钻井液配方优选及其性能评价  

Formulation Optimizing and Performance Evaluation of High-density Formate Drilling Fluid.

作　　者：叶艳[1] 安文华[2] 尹达[2] 赵姗姗[1] 梁红军[2] 卢虎[2] 李磊[2] 

机构地区：[1]中国石油大学(北京) [2]中国石油塔里木油田分公司

出　　处：《钻井液与完井液》2014年第1期37-39,43,共4页Drilling Fluid & Completion Fluid

基　　金：国家科技重大专项:大型油气田及煤层气开发"塔里木盆地库车前陆冲断带油气开发示范工程"(2011ZX05046);国家自然科学人才基金-创新研究群体科学基金项目"复杂油气井钻井与完井基础研究"(51221003)

摘　　要：针对超深井复杂井高温高压高矿化度等"三高"苛刻井下环境,在饱和盐水磺化钻井液基础之上,综合各种单因素的影响,优选出高密度甲酸钾饱和盐水磺化钻井液体系。该钻井液由高浓度甲酸钾基液、抗高温抗盐磺酸盐复合共聚物D300、复合磺化处理剂、pH值缓冲剂、磺化沥青以及表面活性剂等组成。该体系能够抵抗160~180℃高温,密度在2.2 g/cm3以上,抑制性远强于常用无机盐钻井液,润滑性良好,抗盐至饱和、抗钙达800~1 000 mg/L,还可循环利用。评价实验结果表明,该体系的综合性能优良,能显著降低循环压耗,可以适应深井、超深井、巨厚复合盐层以及盐下储层的钻井。Based on saturated brine sulfonated drilling fluid and in view of variety of single factors,the formulation was composed of high-density potassium formate,resistance to high temperature and salt resistance composite sulfonate copolymer D300,composite sulfonation treatment agents,pH buffering agents,sulfonated asphalt and the surface active agent,in order to resolve complex borehole problems at high temperature,high pressure and high salinity in the ultra-deep complex wells.The drilling fluid system is able to resist the high temperature of 160-180℃ with density more than 2.2 g/cm^3,and the anti-pollution capability is as good as to tolerate12%NaCl brine,3%gypsum and 15%cuttings individually or integrate.The experimental results showed the performances of the system were excellent that can significantly reducing circulating pressure loss,which can be used to the deep,ultra-deep,thick salt bed formation and subsalt reservoir wells.

关 键 词：甲酸盐钻井液 高密度钻井液 高温稳定性 抑制性 润滑性 抗固相污染 

分 类 号：TE254.3[石油与天然气工程—油气井工程]