长宁区块龙马溪组龙一_(1)^(4)小层先导试验井试井曲线特征分析  

Analysis on well test curve characteristics of pilot test well in Long 114 of Longmaxi formation,Changning block

作　　者：钟思存 袁翠平 陈佳 陈满 刘若林 王滢 ZHONG Sicun;YUAN Cuiping;CHEN Jia;CHEN Man;LIU Ruolin;WANG Ying(Geological Exploration and Development Research Institute,CNPC Chuanqing Drilling Engineering Company Limited.Chengdu,Sichuan 610051,China;Sichuan Hengyi Petroleum Technology Service Company Limited.Chengdu,Sichuan 610051,China;Sichuan Yuesheng Oil&Gas Field Technical Service Company Limited.Chengdu,Sichuan 610051,China;Sichuan Changning Natural Gas Development Company Limited.Chengdu,Sichuan 610051,China)

机构地区：[1]中国石油川庆钻探工程有限公司地质勘探开发研究院,四川成都610051 [2]四川恒溢石油技术服务有限公司,四川成都610051 [3]四川越盛油气田技术服务有限公司,四川成都610051 [4]四川长宁天然气开发有限责任公司,四川成都610051

出　　处：《油气井测试》2023年第5期74-78,共5页Well Testing

基　　金：中国石油集团川庆钻探工程有限公司科技攻关项目“基于小微裂缝闭合过程的页岩气产气机理及合理生产制度研究”(CQ2023B-24-1-4)。

摘　　要：NH5井为龙马溪组龙一_(1)^(4)小层立体开发先导试验井,该区域已投产水平井箱体主要位于龙一_(1)^(1~2)小层,龙一_(1)^(4)小层动态资料缺乏,生产动态特征及渗流规律不明确,投产1年半,产能低于1~2小层井。在NH5井开展压力恢复试井,对比4小层与1~2小层水平井体积压裂后渗流特征差异,总结4小层储层特征。结果显示,NH5井双对数曲线整体靠上,解释渗透率为0.001 mD,低于1~2小层平均渗透率0.002~0.025 mD,反映出4小层井压裂后SRV区域内综合渗流能力差于1~2小层井,分析原因为4小层脆性矿物含量66.4%,低于1~2小层,导致储层不易压碎、裂缝复杂程度偏低。该分析指出了4小层产能差异原因,为落实井区上部气层产能,进一步提高纵向储量动用率和气田采收率提供技术支持。Well NH5 is a pilot test well for three-dimensional development of Long 1_(1)^(4)in the Longmaxi Formation.The horizontal well boxes that have been put into production in this area are mainly located in Long 1_(1)^(1-2).The dynamic data of Long 1_(1)^(4)are lacking,and the production dynamic characteristics and flow rules are unclear.After one and a half years of production,the productivity of Long 1_(1)^(4)in Well NH5 is lower than that of Long 1_(1)^(1-2).Pressure recovery testing was conducted in Well NH5 to compare the differences in flow characteristics in horizontal wells after volume fracturing between Long 1_(1)^(4)and Long 1_(1)^(1-2),and to summarize the reservoir characteristics of Long 1_(1)^(4).The results show that the log-log curve of Well NH5 is overall upward,indicating a permeability of 0.001 mD,which is lower than the average permeability of 0.002~0.025 mD in Long 1_(1)^(1-2).This reflects that after fracturing,the comprehensive flow capacity of Long 1_(1)^(4)within the SRV region is lower than that of Long 1_(1)^(1-2).The analysis suggests that Long 1_(1)^(4)has a brittle mineral content of 66.4%,which is lower than that of Long 1_(1)^(1-2),making the reservoir less prone to fracturing and resulting in lower complexity of fractures.This analysis identifies the reasons for the difference in production capacity in Long 1_(1)^(4),which provides a technical support for realizing the productivity of the upper gas layers in the well area,for further increasing the vertical reserve utilization rate,and enhancing recovery in gas filed.

关 键 词：长宁区块 试井解释 页岩气 水平井 立体开发 龙一_(1)^(4)小层 压恢试井 渗流特征 

分 类 号：TE353[石油与天然气工程—油气田开发工程]