石油钻采工艺2017，Vol.39Issue(1)：57-60,4.DOI:10.13639/j.odpt.2017.01.011
焦石坝工区页岩气整体固井技术
Overall cementing technologies used for shale gas wells in Jiaoshiba block
摘要
Abstract
The marine shale gas wells in Jiaoshiba block is now the focus of SINOPEC'S exploration and development. In this block, caverns, pores and fractures are developed and associated with shallow gas in the upper strata. In the lower strata, micro-fracture permeable circulation loss happens and gas layers are active, so the conflict between circulation loss and pressure stabilization is obvi-ous. It is difficult to guarantee the cementing quality of long horizontal sections in the surroundings of oil-based drilling fluids. And wellhead pressure is induced for set cement is seriously damaged during large-scale fracturing. To deal with these difficulties, a series of overall cementing technologies suitable for Jiaoshiba block were established by optimizing the setting depth of conductors, developing high-intensity low-density cement slurry system and tough cement slurry system, adopting controllable gel plugging technology and ap-plying well cementing technologies (e.g. circulation loss prevention, pressure stabilization and displacement efficiency improvement). And consequently cementing quality is improved, satisfying the development requirements of Jiaoshiba block. The research results can be used as the reference for well cementing of the same type.关键词
焦石坝/页岩气/韧性水泥浆/固井/可控胶凝堵漏剂Key words
Jiaoshiba/shale gas/tough cement slurry/well cementing/controllable gel plugging agent分类
能源科技引用本文复制引用
马小龙..焦石坝工区页岩气整体固井技术[J].石油钻采工艺,2017,39(1):57-60,4.基金项目
中石化先导项目"丁山及涪陵地区页岩气固井集成技术应用研究"(编号:SG1305-15X(14)). （编号:SG1305-15X(14）
