摘要
海拉尔盆地呼和湖凹陷煤层厚度较大,埋藏深度适中,具有较好的煤层气成藏条件。但由于该区煤层在地震资料上特征不清,如何利用地震资料预测煤层和煤层气分布是急需解决的技术难题。本文首先分析了煤层和煤层气的岩石物理特征,以岩石物理分析为指导,利用波阻抗反演预测了煤层厚度。分析了该区煤层的AVO特征,并利用AVO反演预测了煤层气的分布,初步建立起了一套呼和湖凹陷低阶煤气层的识别方法,可为大庆探区的煤层气勘探提供技术支撑。
Huhehu Depression in Hailar Basin is characterized by thick coal seams at moderate depth, which shows good conditions for coalbed methane reservoir forming.However,coal seam characteristics on seismic sections are not clear.In this paper we propose approaches to predict coal seams and coalbed methane distribution on seismic data. First we analyze petrophysical characteristics of coal seams and coalbed methane,and then we apply impedance inversion to predict coal seam thickness.We also analyze AVO characteristics of coal seams in this area and predict coalbed methane distribution by AVO inversion.Hopefully these approaches will provide necessary preparations for coalbed methane exploration in Huhehu Depression,Hailar Basin.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2013年第A01期58-63,202+7,共6页
Oil Geophysical Prospecting
关键词
煤层气
波阻抗反演
AVO反演
coalbed methane(CBM),wave impedance inversion,AVO inversion
