煤层气地震解释技术应用及效果——以沁水盆地郑庄区块三维为例

3D seismic interpretation of coalbed methane in Zhengzhuang Block,Qinshui Basin

依托沁水盆地郑庄区块三维资料的解释成果,通过煤层地震地质层位标定、构造特征等方面的研究,并应用模型正演、体曲率、蚂蚁体、方差体等技术对微断裂及陷落柱进行精细刻画;利用测井数据交会分析、波阻抗反演技术预测了煤层厚度;利用高亮体属性预测了煤层气富集区带。通过上述技术的综合应用,优选出7个煤层气有利区,其中7区带已由钻探结果验证为煤层气富集区。

This paper demonstrates an example of 3D seismic interpretation for coalbed methane in Zhengzhuang Block,Qinshui Basin.According to seismic calibration and structural characteristics analysis,we describe micro fractures and Karst collapse columns by forward modeling and seismic cube attributes,such as ant,curvature,and variance.Then,using cross-plot analysis of logging data and the impedance inversion,we calculate coal bed thickness.Finally,we predict enrichment and accumulation areas of coalbed methane by the highlight cube attribute.Seven favorable zones of coalbed methane are proposed.And up to now,Zone No.7 has been proved as an enrichment and accumulation zone of coalbed methane by drilling.