摘要
在中深部井段实施气体钻井作业时,需用气体将钻井液置换出井筒,因受注气设备额定工作压力限制,常常采用分段气举方式,耗时长,时效低。针对中深井气举现状,提出了基于气液两相流的充气气举工艺技术,建立了充气气举压降计算模型,通过现场应用表明,该模型计算结果与实际情况较符合,可用以指导现场实践。充气气举工艺能缩短气举时间,提高气体钻井时效,在中深部井段气体钻井中得到广泛应用,已成为气体钻井重要的配套技术之一。
The first step operation is gas-lifting in air drilling, because gas lift pressure is higher than rated working pressure of booster compressor in medium-deep well, multistage gas lift often has been used, which is lower time efficiency. According the gas lift status quo and based on two-phase flow theory, the aeration gas lift technology has been formed, the pressure drawdown calculation model of aeration gas lift was establish. The application results indicated that the calculation results of the model were in agreement with practical situation and the aeration gas lift technology could shorten gas lift time and improve gas lift time efficiency. At present, the technology has been applied widely in air drilling of medium-deep well.
出处
《钻采工艺》
CAS
北大核心
2013年第2期34-36,7,共3页
Drilling & Production Technology
基金
国家科技重大专项"大型油气田及煤层气开发"课题"碳酸盐岩
火成岩及酸性气藏高效安全钻井技术"(2011ZX05021-002)
川庆钻探公司计划项目"充气钻井参数优化设计软件开发与应用"(2011-18(L215-11B00018))部分研究成果
关键词
两相流
充气气举
压降模型
气体钻井
two-phase flow, aeration gas lift, pressure drawdown model, air drilling
