摘要
通过研究济阳坳陷不整合结构地质特征,并结合已发现地层油藏油气输导过程剖析,分析不整合的油气输导方式及性能。结果表明:陆相断陷盆地不整合结构层主要由砂、泥岩组成并各具特征,不整合面上下砂泥岩对接组合可分为砂/砂、砂/泥、泥/砂、泥/泥等4种型式,这些组合型式在平面上具有一定的分布规律;不同的组合型式控制着不整合的油气输导方式,其中砂/砂型控制着不整合的垂向输导方式,砂/泥型、泥/砂型则控制着不整合的横向输导方式;不整合结构中的渗透层横向连续性差,使得不整合横向输导油气范围具有较大的局限性;对一些圈源距离较远的地层油藏进行预测,要特别重视不整合结构型式及其与断层、骨架砂体等的配合作用。
Based on the geologic characteristics of unconfomlity structure in Jiyang depression and the oil and gas transportation process of hydrocarbon reservoir for the found formation, oil and gas transportation way and ability of unconformity were analyzed. The results show that unconformity structure layers with different characteristic are mainly composed of sand and mudstone in continental rifted basin. Sand-mud combination of unconformity surface can be divided into four kinds of types ： sand/ sand, sand/mud, mud/sand and mud/mud. Their distributions have some regularities in the plane. Different combination type controls transportation way of oil and gas of unconformity, in which sand/sand type controls the vertical way, sand/mud, mud/ sand types control the horizontal way. As a result of facies fast changing and non-permeable of mudstone both before and after weathering in rifted basin, poor horizontal continuity of permeable formation of unconformity structure seriously limits horizontal oil and gas transportation extent of unconformity. It is important to particularly concern matching between unconformity structural type and fault, cage sand body for forcasting stratigraphic reservoir with ulterior trap-source distance.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第4期44-48,共5页
Journal of China University of Petroleum(Edition of Natural Science)
基金
中石化重大科技攻关项目(06012)
关键词
石油地质学
地质特征
不整合
输导方式
输导性能
陆相断陷盆地
petroleum geology
geologic characteristic
unconformity
transportation way
transportation ability
continentaltiffed-basin
