摘要
针对致密砂岩气藏水平井整体开发中后期提高采收率对策不明确的问题,以长岭气田登娄库组气藏为例,借助地质建模和数值模拟技术,应用基于气体组成差异的产量劈分方法,在历史拟合基础上,开展气藏精细描述,划分剩余气分布类型,优化加密井型,优选采出程度和经济效益最佳的调整方案。研究结果表明:剩余气分布类型为连片集中展布型、点状局部富集型和边部分散型,剩余储量占比分别为80.3%、4.2%和15.5%;对于正对式、交错式水平井网,直井均为最优的加密井型;“补孔侧钻+加密+增压”方案采出程度最高;选取“补孔侧钻+加密”为最终的开发调整方案,预测期末采出程度可提高约5.5%。
In terms of the problem of lacking effective measures to enhance gas recovery(EGR)in the middle and later period of the overall development of tight sandstone gas reservoirs by using horizontal wells,taking the gas reservoir in Denglouku formation of Changling gasfield as an example,the fine description of the gas reservoir was carried out based on the history production data fitting of the gas reservoir using 3D geological modeling and numerical simulation technology and the output splitting method based on gas composition difference in two reservoir,and the remaining gas distribution is classified.Subsequently,the type of infilling wells is selected,and the optimal adjustment scheme is determined through comparing the gas recovery and economic efficiency.The results show that the remaining gas distribution can be classified into three types,continuous concentrated distribution,local enrichment and edge scattered distribution.The proportion of remaining gas in three distribution types is 80.3%,4.2%and 15.5%,respectively.For parallel and interleaved well patters,optimal infilling well type is vertical well.The combination adjustment scheme of patching holes,sidetracking,infilling and boosting can get the highest recovery,while the adjustment scheme of patching holes,sidetracking and infilling has the best economic benefits.Finally,the scheme of patching holes,sidetracking and infilling with vertical wells is utilized.At the end of prediction period,the gas recovery can be increased by 5.5%comparing with basic scheme.
作者
胡纳川
何东博
郭建林
孟凡坤
李忠诚
张国一
HU Nachuan;HE Dongbo;GUO Jianlin;MENG Fankun;LI Zhongcheng;ZHANG Guoyi(Gas Field Development Institute,Research Institute of Petroleum Exploration & Development of CNPC,Beijing 100083,China;School of Petroleum Engineering,Yangtze University,Wuhan,Hubei 430100,China;Research Institute of Exploration & Development,PetroChina Jinlin Oilfield Company,Songyuan,Jilin 138000,China)
出处
《西安石油大学学报（自然科学版）》
北大核心
2021年第5期55-63,共9页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
“十三五”国家科技重大专项“深层碳酸盐岩气藏高效开发技术”(2016ZX05015-003)。
关键词
开发调整
井网加密
水平井
整体开发
提高采收率
致密砂岩气藏
well pattern infilling
horizontal well
integral exploitation
EOR
tight sandstone gas reservoir
