钻井液高温封堵剂的实验方法研究  

Experimental Study on High Temperature Plugging Agent for Drilling Fluid

作　　者：王宇[1] 罗平亚[2] 谢刚[2] 田甜 张金晶 李博 罗凡 WANG Yu;LUO Ping-ya;XIE Gang;TIAN Tian;ZHANG Jin-jing;LI Bo;LUO Fan(School of Oil and Gas Engineering,Southwest Petroleum University,Sichuan Chengdu 610500;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,SouthwestPetroleum University,Sichuan Chengdu 610500,China)

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500 [2]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

出　　处：《广州化工》2019年第3期36-38,共3页GuangZhou Chemical Industry

基　　金：2018年国家级创新创业训练计划项目"插层吸附抑制作用行为与插层剂分子结构关系研究"(201810615009);西南石油大学第十七期(2017-2018年度)大学生课外开放实验校级重点项目"插层吸附抑制作用行为与插层剂分子结构关系研究"(KSZ17001)

摘　　要：当钻井遇到地层岩石裂缝时,就要求钻井液的添加剂能封堵地层裂缝。为此应提出一套高温封堵剂封堵能力的评价方法,以此来鉴定高温封堵剂在作用于地层裂缝时的作用效果。通过对比研究用10～20目沙粒、20～40目沙粒、40～60目沙粒和100～140目沙粒两两等质量混合的评价效果,最后筛选出用10～20目沙粒和20～40目沙粒等质量混合沙床模拟地层条件然后用此沙床测试加入封堵剂前后渗透率的变化来评价封堵剂的封堵能力的方法。应用此方法,在80℃时封堵率达到99. 34%。When drilling meets formation rock fracture, the additive of drilling fluid is required to block formation fracture. Therefore, a set of evaluation method of plugging ability of high temperature plugging agent should be put forward to evaluate the effect of high temperature plugging agent on formation fracture. The evaluation effects of the mixed quality of sand grains of 10~20, 20~40, 40~60 and 100~140 mesh were studied. A method of evaluating plugging ability by using mixed sand bed of 10~20 mesh and 20~40 mesh sand grain to simulate the formation conditions and then using this sand bed to test the change of permeability before and after the addition of plugging agent was presented. By using this method, the plugging rate can reach 99.34 at 80 ℃.

关 键 词：裂缝 封堵剂 封堵能力 评价方法 

分 类 号：TE254[石油与天然气工程—油气井工程]