摘要
滇东北地区二叠系茅口组灰岩地层十分破碎,存在井漏、塌孔、钻具放空等事故风险。在该地区以往钻井施工过程中采取套管护壁方法进行处理,成本较高、劳动强度大。在页岩气调查井云大地4井施工过程中试验应用X-A成膜钻井液体系,对茅口组灰岩地层掉块、坍塌、地层压力失衡等情况起到很好的抑制和平衡护壁作用,有效地解决了可能出现的各类工程风险,岩心采取率大大提高。
According to the stratigraphic data of Northeast Yunnan,the limestone of Maokou formation of Permian in this area is very broken,and there are risks of well leakage,hole collapse and drilling tool blow‑off.Casing wall protection method was adopted in the past drilling construction in this area,which has high cost and labor intensity.The introduction of X-A film‑forming mud system during the construction of Yundi-4 well has a good effect on restraining and balancing the retaining wall of Maokou limestone formation such as loss of block,collapse and imbalance of formation pressure.All kinds of possible engineering risks are effectively solved and good economic benefits are obtained.
作者
吕文军
童俊涛
曾令
陈明
LÜWenjun;TONG Juntao;ZENG Ling;CHEN Ming(No.290 Research Institution CNNC,Shaoguan Guangdong 512000,China)
出处
《钻探工程》
2023年第S01期223-226,共4页
Drilling Engineering
关键词
页岩气调查井
破碎地层
坍塌掉块
压力失衡
X-A成膜钻井液体系
shale gas survey well
broken formation
collapse and fall off blocks
pressure imbalance
X-A film forming mud system
