摘要
针对苏里格气田部分井压裂施工过程中出现的天然气窜槽问题,通过实验优选出性能良好的胶乳与外加剂,研发出防气窜高强度水泥浆体系。室内评价结果表明,该体系在不同温度下游离液低、流变性能好,水泥石抗折强度较常规水泥石提高了10%左右,48 h最大抗压强度29.5 MPa。现场试验3口井,储层段第一界面优质率100%,第二界面优质率大于94%,压裂施工中压力正常,未出现环空窜流,满足了苏里格气田分层压裂对环空水泥石完整性的要求。
In view of gas channeling in the course of fracture construction in Sulige Gas Field,a gas channeling prevention and highstrength cementation slurry has been researched to the enterprise by experiment optimized latex and cement additives.Experiment in labshows that the slurry has low free fluid and good rheological property,the flexural strength increased about ten percents,the maximumcompressive strength reach 29.5 MPa in 48 hours,It has passed through 3 wells test,the first interface merit factor of one hundred percentand the second interface merit factor more than 94%.The construction pressure is normal,gas channeling is not appeared,meet thestratification of Changqing gas field fracturing of annular cement stone integrity requirements.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2013年第4期51-54,共4页
Oil Drilling & Production Technology
基金
中国石油集团(股份)公司重大科技专项"致密气藏开发重大工程技术研究"课题三"致密气藏钻完井技术研究"(编号:2010E-2303)部分成果
关键词
苏里格气田
分层压裂
固井
防气窜
水泥浆
Sulige gasfield
separate layer fracturing
well cementing
gas channeling prevention
cement slurry
