流体超压对西部凹陷天然气分布的控制作用  

Effect of Fluid Overpressure on the Natural Gas Distribution in the West Depression

作　　者：张宇[1] Zhang Yu(PetroChina Liaohe Oilfield Company,Panjin,Liaoning 124010,China)

机构地区：[1]中国石油辽河油田分公司,辽宁盘锦124010

出　　处：《特种油气藏》2018年第3期28-31,共4页Special Oil & Gas Reservoirs

基　　金：中国石油科技重大专项"复杂地质条件物探关键技术研究与应用"(2012E-34-11)

摘　　要：针对辽河坳陷西部凹陷不同地区天然气分布差异性较大的问题,在钻井和试井资料分析的基础上,运用声波时差方法对该区泥岩流体超压层分布规律进行研究。研究结果表明,西部凹陷存在多套泥岩流体超压封盖层,并以古近系沙三上段和沙一中段为主,具有很强的封盖能力,是控制西部凹陷天然气分布和富集关键因素。该研究有效地指导了辽河坳陷天然气勘探方向。In view of the large differences in the natural gas distribution of different regions in the West Depression of Liaohe Depression,the acoustic time difference is sued to identify the distribution pattern of mudstone fluid overpressure seals based on drilling and well test data.Research indicates that there are multiple sets of mudstone fluid overpressure seals in the West Depression,which mainly distribute in the Paleogene upper Sha3 Member and middle Sha1 Member.These seals with strong sealing capacity are considered as a key factor controlling the natural gas distribution and enrichment in the West Depression.This research could provide certain guidance for the further natural exploration in the Liaohe Depression.

关 键 词：西部凹陷 天然气 盖层 泥岩流体超压封盖层 分布规律 辽河坳陷 

分 类 号：TE121.3[石油与天然气工程—油气勘探]