地震属性分析与岩性油气藏勘探

Seismic attributes analysis and lithological reservoir exploration

(1.清华大学工程力学系，北京100084；2.中国石油勘探开发研究院西北分院，甘肃兰州730020)

Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

在岩性油气藏勘探阶段，地震属性分析在很大程度上应用于储集体储集性能和含油气性评价。通过地震属性分析，一方面可以验证地震反演—储层预测的可靠性，确定储集体的储集性能，另一方面通过与已知含油气区对比和属性交会、映射等，预测目标的含油气性。通过在吐哈盆地胜北洼陷和江汉盆地潜江凹陷的应用表明，地震数据体的选择、提取属性时窗大小的确定、顶底约束层位的解释、地震属性的优选、地震属性地质含义的确定等构成地震属性应用的关键，同时应加强波阻抗、测井参数反演、分频、波形分类等非常规数据体属性的应用。

In lithological reservoir exploration stage, the seismic attributes analysis mainly focuses on the storage capability and oil-gasbearing possibility. The seismic attributes analysis may verify the reliability of seismic inversion, reservoir prediction, and, at the same time, it may predict the possibility of oil-gas bearing of the target area according to the comparison with the known oil-gas bearing area and the seismic attributes matrix. The application of this method in Shengbei Sag of Turpan-harmy basin and Qianjiang Sag of Jianghan basin shows that the keys for seismic attributes analysis are the selection of seismic data volume, definition of the size of time windows for attributes extraction, interpretation of the top and bottom constraining horizons, preference of seismic attributes, and identification of geological signification of seismic attributes. More attention should be paid to the application of the seismic attributes for nonroutine data volume, such as impedance, well-log inversion, frequency division, waveform classification etc.