摘要
由于苏里格气田苏75区块东、西部沉积特征不同,导致地震资料特征、气层位置、AVO特征不同,利用AVO技术获得的单一参数以及烃类指示属性难以获得满意的储层预测结果。为此,文中通过对地震资料的CMP道集分析、气层理论模型正演及井旁道气层模型正演,发现不论气层顶、底界面的AVO响应的极性如何,反射振幅的绝对值均随着炮检距的增大而增大,利用AVO技术可以有效检测目的层段中较厚的气层。本次研究利用拟泊松比及拟横波反射系数较好地检测了苏75区块气层的分布特征,检测结果与井资料吻合程度较高,为该区的油气开发提供了技术支持。
Sedimentary difference between the eastern and western of Block Su-75in Sulige Gasfield causes characteristic differences in seismic data,gas reservoirs position,and AVO response.It is difficult to predict reservoir using single parameter and hydrocarbon indictor attributes obtained from AVO analysis.Based on CMP gathers analysis, forward modeling of gas-reservoirs theoretical model and gas-reservoirs actual model passing through a well,the absolute amplitude value of reflections from gas reservoirs increases with the offset no matter what AVO response polarity is from the reservoir top and bottom.So AVO can be used to detect effectively the thicker gas-bearing.Our research identifies the gas bearing distribution in Block Su-75using pseudo poissons ratio and pseudo shear wave reflective coefficient.The result is highly consistent with the well drilling data,which provides a strong support for the future oil and gas exploitation in the area.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2013年第A01期109-114,202-203+9,共6页
Oil Geophysical Prospecting
关键词
CMP道集
AVO
拟泊松比
拟横波反射系数
含气性检测
CMP gathers,AVO,pseudo poisson's ratio,pseudo shear wave reflection coefficient,hydrocarbon detection
