苏里格地区含气储层AVO特征研究

Researching on AVO characteristics of gas bearing reservoirs in Sulige area

AVO技术是一种非常实用有效的地球物理方法,对于寻找天然气藏有着独特的优势。本文以AVO技术的基本理论为基础,结合实际地质情况,应用Zoeppritz方程进行了苏里格地区的正演模拟,并与实际道集资料、分偏移距叠加资料进行对比,结果显示对于分布稳定,厚度较大的含气储层而言,III类AVO为最主要类型,对于厚度较小的储层而言,因受到地震复合反射等因素的影响,也可能出现其他AVO类型。

AVO is a practical and widely used geophysical method to seek gas reservoir with distinctive advantage. A simulation is made in this article by using the Zoeppritz equation based on essential theory and actual geological situation in Sulige gasfield.The comparison between the simulation and practical data proves that type III AVO is mainly existed in steady thickness reservoir, and for the thin stratum, other types can appear in it by the influence of complex reflection.