地球物理含气性预测技术在煤层气中的应用——以沁南东三维区为例

Application of Geophysical Gas-prediction Technology in CBM——Taking the 3D Seismic Block in Southeast Qinshui Basin as an Example

煤层的含气预测对寻找煤层高产富集区以及指导煤层气布井与开采有着至关重要的作用,本文以沁南东为例,将常规油气藏的含气性预测方法包括振幅属性、频率属性与叠前AVO技术应用到煤层气中,通过正演论证了技术方法的可行性,通过与井标定优选出了最适合本地区煤层的含气性预测方法。

The gas-bearing prediction of coal seams is crucial for finding enriched areas and directing well pattern optimization.In this paper,Southeast of Qinshui Basin is selected as an example,and three methods are chosen to predict the gas-bearing of coal seams which include Seismic Attribute,Energy attenuation abnormity,AVO analysis.After forward modeling,the seismic response characteristics and AVO abnormity of the gas-bearing reservoir could be obtained,so that more available method could be used to prediction the gas-bearing of coal seams after calibrate with wells.