红层岩石物理特征与储层预测技术研究——以东营凹陷纯化地区为例  

A Study of Redbed Rock Physical Features and Reservoir Forecasting Techniques

作　　者：才巨宏[1] 

机构地区：[1]中国石化集团胜利石油管理局石油开发中心,山东东营257000

出　　处：《工程地球物理学报》2012年第3期306-310,共5页Chinese Journal of Engineering Geophysics

摘　　要：在孔店—沙四下沉积时期,在东营凹陷的纯化地区发育了以冲积为特点的红色碎屑岩地层,紫红色泥岩与砂岩呈互层分布。砂岩单层厚度薄,砂体侧向叠置,埋深较大,预测难度大;红层储层具有层速度大、密度高、低伽马等特征。研究分析表明,声波阻抗难以有效区分储层与围岩,泊松比与密度的乘积能较好反映砂岩特征,利用叠前弹性反演技术对研究区储层进行了预测,取得较好效果。Red clastic rock strata beds are developed in the Chunhua area of Dongying sag, where mudstones and sands distribute interbeddedly. The sand body with the single bed is thin,the lateral sand body is overlaying, the buried depth is big and the prediction is difficult. The redbed reservoir has the characteristics with big velocity, high density and low gamma. In this paper, the study shows that it is difficult for acoustic wave impedance to distinguish reservoirs and surrounding rocks, but the arithmetic product of Poisson ratio and density can demonstrate the features of the sand rock very well. So the prestack elastic inversion technique is applied to predicting the reservoir in the research area and good result is achieved.

关 键 词：红层 泊松比乘密度 叠前波阻抗反演 

分 类 号：P631[天文地球—地质矿产勘探]