摘要
AVO是研究地震CRP道集振幅变化规律(随炮检距)的技术,能够从叠前地震数据中获取与地层岩性和含油气性相关的地震属性体,进而进行含气预测,是一门适应勘探开发发展需要的地震技术。传统的"亮点"技术适合检测Ⅲ类AVO含气异常,对于中、深层含气砂岩表现出来的Ⅰ类AVO现象无法识别。某油气田气藏富集,同时含水层也广泛分布,各类AVO现象共存。以某油气田A井为例,通过利用AVO技术,结合流体替换,寻找差异,可以有效识别深层Ⅰ类AVO含气砂岩。
AVO is a technology which is used to study the change of seismic CRP gather amplitude（with offset）.Through applying AVO to exploring oil and gas,it can obtain the seismic attribute volumes related to lithology and hydrocarbon from prestack seismic data and then predicts the gas.The traditional ＂bright spots＂ technology is useful to predict the AVO anomaly of Class Ⅲ,but it cannot recoganize the AVO anomaly of Class I of the deep gas-bearing sand.Taking well A of an oil field as a case study,this paper applies AVO and fluid replacement technology to finding the difference between gas and water and identifies the deep gas-bearing sand of class I.
出处
《工程地球物理学报》
2011年第3期279-283,共5页
Chinese Journal of Engineering Geophysics
关键词
AVO
CRP道集
炮检距
岩性
含气预测
流体替换
气层
AVO
CRP gathers
offset
lithology
gas-bearing prediction
fluid replacement
gas layer
