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.
出处
《现代地质》
CAS
CSCD
北大核心
2009年第5期987-992,共6页
Geoscience
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
Dongying sag
Yanjia oilfield
sand-gravel rock body
logs reconstruction
cluster analysis
lithologic identification
stratigraphic division
