川渝地区东部废弃井挖潜方法探讨  

DISCUSSION ON TAPPING POTENTIAL METHOD OF ABANDONED WELLS IN EAST OF SICHUAN AND CHONGQING AREAS

作　　者：张明文[1] 熊兰琼[1] 农冬蕾[1] 马廷虎[1] 

机构地区：[1]四川石油管理局川东开发公司

出　　处：《天然气勘探与开发》2005年第4期30-33,共4页Natural Gas Exploration and Development

摘　　要：川渝地区东部目前已完钻井中,废弃井有400多口,占总井数的47.6%。这些井分布广泛,有的位于构造轴部,有的位于构造翼部或边部,也有的处在单独裂缝系统。为有效合理地开采地下天然气资源,提高气田采收率。针对川渝地区东部废弃井,开展了再利用的研究工作。将这些废弃井分别进行报废原因归类,潜力分析,潜力层评价。在此基础上,制定潜力层挖潜方法,优选可供挖潜层位的潜力井,分期分批实施。3年来,先后对15口废弃井进行了挖潜实施,成功率100%,新增井口产能30.5×104m3/d,新增各类储量20.8×108m3。对废弃井挖潜有所突破,为今后川渝地区东部废弃井再利用,提供了重要的参考价值。There are more than 400 abandoned wells among the drilled wells in the east of Sichuan and Chongqing areas,which account for 47.6% of the total wells.The abandoned wells are distributed widely.Some of them lie at the axis of structures.Some lie at the wings or edges of structures.Some lie at the separated fracture system.To recover the underground gas resources effectively and reasonably and improve the recovery factor of gas fields,aiming at the abandoned wells in the east of Sichuan and Chongqing areas,the study is conducted to re-utilize the wells.First,the wells are classified respectively by the reasons why they are abandoned.Their potentials are analyzed.And their potential pays are evaluated.Then,the tapping potential method is made for the potential pays.The potential wells with potential pays are optimized.They are rehabilitated by stages and in groups.For the last 3 years,the tapping potential is conducted for 15 abandoned wells early or late.The success ratio reaches 100%.The productivity at wellhead increases 305,000 m^3/d.The reserves of various classes increase 2080 MCM.It makes breakthrough for tapping potential of abandoned wells and provides important reference for re-utilization of abandoned wells in the east of Sichuan and Chongqing areas in the future.

关 键 词：川渝地区 废弃井 潜力 挖潜 

分 类 号：TE377[石油与天然气工程—油气田开发工程]