钻井液与完井液2025，Vol.42Issue(6)：748-755,8.DOI:10.12358/j.issn.1001-5620.2025.06.006
抗高温气滞塞体系构建及滞气机理
Formulation of High Temperature Gas-Kick Preventer and Its Mechanism of Blocking Gas Cut
摘要
Abstract
In high temperature reservoir operations,oil/gas cut causes drilling accidents such as well kick and even well blowout.Conventional polymer gels,though can be used to prevent gas channeling from occurring,have poor high temperature resistance.In this study,a high temperature gas-kick preventer was prepared using a high temperature polymer AP-9,a crosslinking agent(polyethyleneimine and aluminum citrate in a ratio of 1∶1)and thiourea.Laboratory experiments were conducted to find the effect of the concentration of each component on the thermostability of the high temperature gas-kick preventer.As a result of the experiments,an optimal composition was determined as:0.5%AP-9+0.4%crosslinking agent+0.25%thiourea.Laboratory evaluation results show that at 160℃a gel formulated with 25 000 mg/L Na+saltwater and the high temperature gas-kick preventer has viscosity of 7120 mPa·s after gelling,indicating that the high temperature gas-kick preventer has good salt resistance.After heating for 72 h,the viscosity of the saltwater gel still reaches 3328 mPa·s,and the pressure bearing strength of the saltwater gel is 0.23 MPa/m.The results of this study provide a technical support for effectively preventing gas kick in a high temperature well,they are helpful for achieving whole-process underbalanced drilling,and are of great importance to improving the safety and efficiency of drilling operation.关键词
高温储层/聚合物凝胶/耐高温气滞塞体系/滞气性能Key words
High temperature reservoir/Polymer gel/High temperature gas-kick preventer/Gas-kick prevention performance分类
能源科技引用本文复制引用
张震,尹达,苏晓明,冯魏..抗高温气滞塞体系构建及滞气机理[J].钻井液与完井液,2025,42(6):748-755,8.基金项目
中国石油天然气股份有限公司塔里木油田分公司科技攻关项目"耐170℃以上高性能气滞塞研发"(671023115030). （671023115030）
