伊通盆地莫里青地区双阳组第一段储层特征

摘要

This paper discusses the reservoir properties of Member 1 of Paleogene Shuangyang Formation of the Moliqing region in Yitong basin to provide the foundation for the further exploration. It analyses the petrology, diagenesis, reservoir properties, the relationship of Four Characteristics and other the basic characteristics of this member and establishes the logging recognition standard of water, gas and oil. The analysis and comparison of the single well sand body show that there develops fan delta sand body and sublacustrine fan sand body in Sublayer 2 and 3 of Member 1 of Shuangyang Formation in Moliqing area. In Sublayer 1 and Sand set I, the sand bodies do not develop and develop less upward. The sandstone reservoirs in the plane contiguously develop, they are mainly distributed over the Jianshan tectonic belt in the east of the study area, the fault-fold belt on the northwest margin, and the Xiaogushan slopes in the southwest. The trend of the plane distribution of porosity and permeability is in accord with that of the sandstone reservoir thickness. The Jianshan tectonic zone (Well Yi-6 area) in the northeast of the study area, and the Xiaogushan slope zone (Well Yi-52 area) in the southwest should be the favorable exploration zones of Member 1 of Shuangyang Formation in the Moliqing area and Sublayer 3 and 2 of Sand group Ⅱ are the favorable exploration horizons.%探讨伊通盆地莫里青地区古近系双阳组第一段储层特征,为勘探选区提供依据.对储层的岩石学、成岩作用、储集物性等基本特征及储层“四性”关系进行分析,确立了莫里青地区双阳组第一段测井油气水识别标准.单井砂岩对比分析表明,莫里青地区双阳组第一段Ⅱ砂组第3小层和第2小层发育扇三角洲砂体和湖底扇砂体,第1小层和Ⅰ砂组砂体发育较少,砂体沉积在纵向上不断减少；砂岩储层在平面上连片发育,主要分布于东部的尖山构造带、西北缘断褶带、西南部的小孤山斜坡带；孔隙度和渗透率平面展布与砂岩储层厚度平面展布的趋势相一致.研究区东北部的尖山构造带(伊6井区)和西南部的小孤山斜坡带(伊52井区)是勘探的有利区带,Ⅱ砂组的第3小层和第2小层是有利勘探层位.