砂砾岩体内幕岩性识别方法初探——以东营凹陷盐家油田盐22断块砂砾岩体为例  

Preliminary Study of the Lithologic Identification Methods of the Inside of Sand-Gravel Rock Body Reservoirs: An Example from Sand-Gravel Rock Body of Yan 22 Block in Yanjia Oilfield of Dongying Sag

作　　者：杨勇[1,2] 牛拴文[2] 孟恩[3] 张红贞[3] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国石油化工股份有限公司胜利油田分公司东辛采油厂,山东东营257094 [3]中国地质大学能源学院,北京100083

出　　处：《现代地质》2009年第5期987-992,共6页Geoscience

摘　　要：东营坳陷盐家油田砂砾岩体为近物源、快速堆积的近岸水下扇沉积,扇体厚度大,横向变化快。巨厚砂砾岩体内部的精细地层划分对比一直是制约该区进一步勘探开发的难点。根据该区盐22断块砂砾岩体的沉积特征,首先运用测井曲线重构方法划分出砂砾岩体的砂砾岩段、泥岩段,剔去明显的非储层;其次运用聚类分析方法识别砂砾岩段的岩性构成。砂砾岩体内幕岩性划分结果与岩心资料比较吻合率为96.6%,与成像资料比较吻合率为96.2%。该方法为该区厚层砂砾岩体内部地层精细划分与对比提供了可靠的地质依据。Sand-gravel rock body in Yanjia oilfield of Dongying sag is a kind of nearshore sub-sea apron deposit with characteristics of close source, quick accumulation, heavy thickness and rapid lateral variation. The technology for correct division and comparison of the strata was inadequate and immature in the past, the subdivision and comparison of the inside of the thick sand-gravel rock body is a difficulty for oil geologic research of such reservoirs. According to sedimentary characteristics of sand-gravel rock body of Yan 22 block in Yanjia oilfield, firstly, sand-gravel rock intervals and mudstone intervals are subdivided by logs reconstruction method, which can get rid of the sharp nonreservoirs. Secondly, lithologic constituent of sand-gravel rock intervals is identified by cluster analysis method. Compared with core and FMI, the match rate of the results of reconstructive logs and cluster analysis is 96.6% and 96. 2% respectively, which provides a geologic foundation for the subdivision and comparison of such reservoirs.

关 键 词：东营凹陷 盐家油田 砂砾岩体 测井曲线重构 聚类分析 岩性识别 地层划分 

分 类 号：TE121.34[石油与天然气工程—油气勘探]