白家海凸起侏罗系有效储层地震属性响应研究

The seismic attribute response to the effective reservoir of Jurassic in Baijiahai arch

地震属性分析已成为油气勘探领域的一种重要的方法与技术手段,其在储层预测中也发挥越来越重要的作用。根据地震属性分析技术的基本原理和方法流程,提取了三维地震资料的平均波谷振幅属性,并结合沉积相对白家海凸起侏罗系齐古组有效储层进行了预测,推断出了有效储层的有利发育带。研究表明,有效储层表现为上部泥岩小波阻抗、下部砂岩大波阻抗的特征,波谷振幅特征显著;有效储层的地震剖面表现为不连续的强振幅反射,在平均波谷振幅属性上表现为高振幅值的特征,所预测的有效储层区与沉积相匹配。

The seismic attribute analysis has become an important means of oil and gas exploration,especially in playing an increasingly important role in the exploration of the subtle reservoir.This article is based on the basic principles and method processes of seismic attributes technology,extracted average trough amplitude attribute in three-dimensional seismic data,predicted Jurassic Qigu effective reservoir distribution combined with sedimentary facies on Baijiahai arch,inferred the favorable zones for the development of effective reservoir.study shows:The characteristics of effective reservoir showed that wave impedance is Smaller on the upper mudstone and larger on the lower sandstone,the trough amplitude characteristics is significant;Seismic profiles showed discontinue high amplitude reflection;The average trough amplitude attribute performance high amplitude value;Based on distribution of high amplitude value of average trough amplitude attribute,speculated effective reservoir from known well field to unknow well field,final sketched out effective reservoir,and compared with sedimentary facies characteristics,shows good results.