摘要
非均质性是地质体的基本特点,尤其是低渗透油气层的显著特点。在普遍低渗的背景下,可能存在局部的相对富集区块,这些区块往往油气产量较高,预测这些区块分布规律一直是石油地质学家追求的目标。笔者等从沉积相带-孔隙特征-油气运移聚集这样一个油气成藏系统出发,提出一种预测方法,并对鄂尔多斯盆地庆华地区延长组低渗油气层的局部富集区块进行预测,经勘探实践验证,取得了一定的成功。
The characteristics of low-permeability reservoirs are lower porosity,lower permeability and in homogeneity.But there are some probable favorable higher-permeability blocks against the background of widespread low permeability because inhomogeneity.In this case,these higher-permeability blocks probably form petroleum-gathering blocks locally if petroleum is enough. Proceeding from the petroleum-accumulation system of sedimentary facies pore feature-petroleum migration and accumulation,the author has proposed a method of prediction and predicted of the local petroleum gathering blocks in the low-permeability reservoirs of the Yanchang Formation in the Qinghua area,Ordos basin.Exploration has verified that a certain success has been achieved in the prediction.
出处
《地质论评》
CAS
CSCD
北大核心
1996年第S1期242-246,共5页
Geological Review
关键词
低渗油气层
局部富集区块
成藏系统
庆华地区
low-permeability reservoir
petroleum-gathering block
petroleum-accumulation system
Qinghua area
