滴南凸起中段河道砂体识别方法研究

Identification Method of Channel Sandbody in the Middle Segment of Dinan Uplift

准噶尔盆地腹部油气资源丰富,目前较明显的构造型圈闭已经很难发现,勘探的主要目标集中在寻找岩性圈闭上,而河道砂体又是地层-岩性圈闭的重要类型。如何快速、准确识别河道砂体是勘探研究工作的难题之一。河道砂体以储层薄、横向变化快为特点,常规方法难以识别。以三维地震、钻井及生产动态等资料为依据,通过对三维地震资料提高分辨率的优化处理,利用三维地震能量相干属性等分析技术手段,识别出该区一系列河道目标群,再经过目标优选,落实了勘探目标;并总结出适用于滴南凸起中段曲流河道砂体识别的技术序列,同时该技术方法序列在准噶尔盆地具有一定的推广意义。

Oil and gas resources in the abdomen of Junggar Basin were rich,more obvious structural traps were hard to be found out,so the main exploration goals focused on looking for lithologic traps,and channel sand body was an important type of formation-lithologic trap.How to quickly and accurately identify the channel sand body was one of the challenges faced by the exploration research workers.Channel sand body was characterized by thin reservoir and fast lateral changes,thus it was hard to be identified by conventional methods.Based on three-dimensional seismic,drilling and production performance data,through improving resolution for threedimensional seismic data,coherent energy gradient technology was used to identify the series of channel target groups.After target optimization,the exploration targets are determined.A set of channel sand body identification technologic series suitable for Dinan Area are summarized,at the same time,the technical methods are valuable for popularization in Junggar Basin.