鄂西渝东地区气体钻井气液快速转换技术  

FAST CONVERSION TECHNOLOGY OF LIQUID AND GAS IN GAS DRILLING IN HUBEI YUDONG AREA

作　　者：张良万[1] 

机构地区：[1]中国石化江汉石油管理局钻井公司

出　　处：《钻采工艺》2010年第5期11-14,21,共5页Drilling & Production Technology

基　　金：中国石化集团公司先导项目"鄂西渝东海相深井钻井技术研究"(编号:JKZ0306005);中国石化集团公司项目"南方海相超深井钻井技术研究"(编号:JKZ0306005);中国石化集团公司项目"分支井钻井技术先导试验"(编号:SG0984)

摘　　要：气体钻井与常规钻井液钻井相比具有速度快、周期短、综合成本低等优点,但气体钻井结束后井眼在由气体介质转换成液体介质过程中,由于转换的钻井液性能不适应干燥的井下条件、转换工艺技术不合理,易出现复杂情况或事故,使得转换时间长,气体钻井优势没有充分体现出来。为解决鄂西渝东地区气体钻井结束后转换成钻井液钻井的井壁稳定、井眼畅通和防塌等问题,在总结多年气体钻井现场实践经验的基础上,提出了气体钻井后转换为钻井液体系和气液转换工艺及井眼清洁的工艺技术措施。目前在该区块已经完井40多口,避免了井喷失控,保障了钻井工程的安全、质量和速度,保护了资源和环境,为同类气井的钻井施工提供了可借鉴的经验。Compared with conventional drilling fluid drilling,gas drilling has the advantages of fast speed,short cycle and low cost.But after the gas drilling finished,for the performance of drilling fluid couldn't meet dry downhole conditions and the conversion technology was unreasonable during the transforming gas medium into liquid medium,the downhole complex or accident were often occurred.To solve the sidewall stability,borehole flow and anti-collapse and other issues in Hubei Yudong area during transforming gas drilling into drilling fluid,the gas /fluid conversion technology and hole cleaning measures were proposed.The gas /fluid conversion technology has been applied in 40 wells,avoiding the hole blow,ensuring the drilling safety,quality and speed,and protecting the resources and the environment.

关 键 词：气体钻井 气液转化 钻井液 步骤 

分 类 号：TE242.6[石油与天然气工程—油气井工程]