【摘要】 为预测盐城凹陷含气砂岩的分布范围,利用AVO正演模拟和流体替换等工作取得本地区含气储层的AVO响应特征,并通过该地区关键产气井实际地震资料的AVO分析结果进行验证,再以Zoeppritz方程的Shuey近似表达式为基础,计算出P(截距)和G(梯度)等AVO属性,并通过PG属性进行含气储层的识别,刻画出该区含气砂岩横向和纵向展布特征,结果与实际情况相符。更多还原

【Abstract】 To predict the distribution range of gas- bearing sandstone in Yancheng Sag,the AVO responding characteristics of gas- bearing reservoir were obtained by AVO forword modeling and fluid replacement. And the AVO analysis results of the actual seismic data from the key gas producing wells were verified. Based on the Shuey approximate expression for the Zoeppritz equation,it was calculated that AVO attributes including P( intercept),G( gradient),and so on. Finally,based on identification of gas reservoirs by PG attribute,the lateral and longitudinal distribution characteristics of the gas-bearing sandstone were described in this area.更多还原