摘要
四川盆地上三叠统须家河组气藏经历了50多年的勘探开发,存在着"储量大、采出低"的难题。工厂化井作业是降低钻完井、井场建设成本,提高作业效率的重要手段。为此,基于北美地区工厂化钻完井作业成功实施的案例,综合分析了四川盆地金秋区块须家河组非常规天然气资源的特点,提出了以下工厂化井作业模式:①采用小井眼结构及单井场最多布36口井,井间地下间距650m的井眼数量优选方案;②采用单排、多井丛且有备用井眼(井丛)的丛式井布局模式;③采用3项交叉作业(钻井+完井+生产)模式,缩短井交付周期;④柔性井场布局设计可以有效地避开地形的限制;⑤选用定制钻机和修井机来完成特定作业目的;⑥作业过程中合理设计离线作业以提高钻完井效率;⑦采用批量完井压裂工厂化模式。这种工厂化井作业可为非常规天然气资源高效、低成本开发提供技术思路和实现手段。
Although after being explored and developed over the past five decades, the Upper Triassic Xujiahe Fm gas reservoirs in the Sichuan Basin are still facing with the problem of high reserves but low production. The factory like practice of well production is one of the important means to reduce the cost in drilling and completion 8c well site construction and improving the operation efficien- cy. Therefore, based on many successful case histories of factory-like drilling and completion work in the North America, this paper made an integrated analysis of the characteristics of unconventional natural gas resources in the Xujiahe Fm in the Jinqiu Block, Si chuan Basin, and then recommended this factory-like practice of well production for this block. First, an optimal scheme of well structure and well numbers will be adopted： slim-hole structure, 36 wells at the most in a single well pad, and a distance o{ 650 m between wells. Second, a cluster well pattern was laid out： a single row, multiple wells with back up holes （cluster）. Third, the simultaneous operation （SIMOP） mode will be performed in drilling, completion and production to shorten the well＇s drilling cycle. Fourth, the flexible layout at a well site will avoid being restricted by the landform. Fifth, special operations will be performed by use of the customized drilling and workover rigs. Sixth, drilling and completion efficiency will be improved by an optimal design of off-line operation. Seventh, the factory-like volume production mode will be used in completion and fracturing processes. This study provides a new idea and a reliable technological means to achieve the high-efficiency and low-cost exploitation of unconventional natu ral gas resources.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2013年第6期54-59,共6页
Natural Gas Industry
关键词
四川盆地
金秋区块
工厂化钻井
丛式井
批量钻井
交叉作业
离线作业
欠平衡钻井
低成本开发
Sichuan Basin, Jinqiu Block, factory-like drilling, cluster well, batching drilling, cross operation, off-line operation, underbalanced drilling, low-cost exploitation
