普光气田长兴组礁滩体精细刻画及认识  

Fine characterization and understanding of reef-shoal bodies in Changxing Formation of Puguang Gas Field

作　　者：付东阳[1] 汪功怀[1] 彭鑫岭[2] 杜浩坤 刘忠亮[1] 张渊[1] 程杨[1] 李娜[1] FU Dongyang;WANG Gonghuai;PENG Xinling;DU Haokun;LIU Zhongliang;ZHANG Yuan;CHENG Yang;LI Na(Geophysical Research Institute,Zhongyuan Oilfield Company,SINOPEC,Puyang 457001,China;Puguang Branch,Zhongyuan Oilfield Company,SINOPEC,Dazhou 635000,China)

机构地区：[1]中国石化中原油田分公司物探研究院,河南濮阳457001 [2]中国石化中原油田普光分公司,四川达州635000

出　　处：《断块油气田》2023年第6期975-981,共7页Fault-Block Oil & Gas Field

基　　金：中国石化集团公司科研项目“普光复杂山地高精度地震勘探技术研究”(P21003)。

摘　　要：针对普光气田长兴组礁滩体分布规律认识不清楚、台缘礁气水关系复杂的问题,开展了长兴组礁滩体地震识别及台缘礁内幕精细刻画工作。通过井震精细标定,明确了礁滩体储层地震响应特征,利用多属性分析等手段对长兴组礁滩体进行宏观识别,结合最新古地貌恢复结果分析了礁滩体平面展布规律;利用瞬时相位与波阻抗反演结果对台缘生物礁群的内幕结构进行了精细刻画,并结合生产动态资料分析了单礁体储层的连通性。结果表明:长兴组发育台缘礁群与台内礁滩复合区2类礁滩体,礁滩复合区的分布受到台缘礁间水道控制,宽水道对应礁滩复合区面积大,窄水道对应礁滩复合区面积小,平面上呈近似扇形分布;台缘礁群在长兴组中上部可识别2期次50个单礁体,呈现5类不同的叠加发育模式,并且2期次的单礁体储层互不连通,同一期次侧向叠置的单礁体储层普遍连通。研究结果对普光气田长兴组下步勘探及开发具有一定指导意义。In order to solve the problems of unclear distribution law of reef-shoal bodies and complex gas and water relationship in platform margin reefs in Changxing Formation of Puguang Gas Field,seismic identification of reef-shoal bodies and fine characterization of platform margin reefs are carried out.Through fine well-seismic calibration,the seismic response characteristics of reef-shoal bodies are defined,and the reef-shoal bodies in Changxing Formation is identified macroscopically by means of multi-attribute analysis,and the plane distribution law of reef-shoal bodies is analyzed based on the latest paleo-geomorphology recovery results.The inner structure of the platform edge reef group was described by instantaneous phase and wave impedance inversion,and the connectivity of the single reef was analyzed based on the dynamic production data.The results show that there are two types of reef-shoal bodies in Changxing Formation,namely the platform edge reef group and intra-platform reef-shoal complex area.The distribution of reef-shoal complex area is controlled by the channel between the reef and the platform edge.The wide channel corresponds to a large reef-shoal complex area,while the narrow channel corresponds to a small reef-shoal complex area,wihch shows fan-shaped distribution in plane.A total of 50 single reefs in two stages can be identified in the middle and upper part of Changxing Formation,showing 5 types of different superimposed development patterns.And the single reef reservoirs in two stages are not connected,while the single reef reservoirs superposed laterally in the same stage are generally connected.The research results have certain guiding significance for the next exploration and development of Changxing Formation in Puguang Gas field.

关 键 词：古地貌 台地边缘 生物礁 储层连通性 长兴组 普光气田 

分 类 号：TE132.14[石油与天然气工程—油气勘探]