焦石坝工区页岩气整体固井技术

发布时间：2018-04-02 16:47

本文选题：焦石坝　切入点：页岩气　出处：《石油钻采工艺》2017年01期

【摘要】：焦石坝工区海相页岩气井现已成为中石化勘探开发的重点,该工区上部地层溶洞裂缝发育,并伴随有浅层气,下部为微裂缝渗透性漏失且气层活跃,井漏和压稳矛盾突出,油基钻井液条件下长水平段固井质量不易保证以及大型压裂对水泥石破坏严重易造成井口带压。通过优化导管下入深度,研发高强低密度水泥浆体系和韧性水泥浆体系,使用可控胶凝堵漏技术,应用防漏、压稳、提高顶替效率等固井工艺,形成了焦石坝工区整体固井技术,提高了固井质量,满足了焦石坝工区开发的需要,为同类井固井提供了一定的借鉴作用。
[Abstract]:Marine shale gas wells in Jiaoshiba area have become the focus of exploration and development in Sinopec. The karst cave fractures in the upper formation of this area have been developed, accompanied by shallow gas, with micro-fracture permeability leakage and active gas formation in the lower part, and the contradiction between well leakage and pressure stability is prominent.The cementing quality of long horizontal section under the condition of oil base drilling fluid is not easy to be guaranteed, and large scale fracturing is easy to cause serious damage to cement stone and lead to wellhead pressure.By optimizing the penetration depth of the pipe, developing the high strength and low density cement slurry system and the ductile cement slurry system, using the controlled cementing and plugging technology, applying the cementing techniques such as preventing leakage, pressing steady, improving displacement efficiency, etc.The integral cementing technology of Jiaoshiba working area has been formed, the cementing quality has been improved, and the development needs of Jiaoshiba working area have been met, which has provided some reference for the same well cementing.
【作者单位】：中石化中原石油工程有限公司固井公司;中国石油大学(华东)石油工程学院;
【基金】：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))
【分类号】：TE256

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