摘要
提高煤层气开采效率的关键在于对煤层气富集区的准确预测。目前,地震勘探是煤层气富集区预测的主要地球物理方法。相干、曲率、蚂蚁体等地震属性对煤层气储层预测较为敏感。通过上述地震属性分析方法研究,可以预测煤层孔渗较好的储气层分布情况,同时可分析裂缝发育方位角,确定区域构造主应力,提供压裂最佳方位角,提高煤层气抽采效率。应用结果表明,地震属性分析技术对裂隙发育预测和提高煤层气开发效率具有较好的适用性。
The critical point of improving CBM drainage efficiency lies in the accurate prediction of CBM enrichment area, and at present, seismic exploration is the main geophysical method for predicting coalbed methane enrichment area. Coherence, curvature, ant body and some other seismic attributes were highly sensitire on CBM reservoir prediction. The above seismic attribute analysis method could predict the distribution of higher porosity and permeability reservoir in seam, analyze fracture development azimuthal angle and regional structure principle stress, achieve fracturing optimal azimuthal angle and improve CBM drainage efficiency. The application results showed that the seismic attribute analysis technology had preferable applicability in predicting fracture development and improving CBM drainage efficiency.
作者
段天柱
Duan Tianzhu(China Coal Technology and Engineering Group Chongqing Research Institute, Jiulongpo, Chongqing 400039, China)
出处
《中国煤炭》
2019年第3期28-32,共5页
China Coal
基金
"十三五"国家科技重大专项示范工程资助项目(2016ZX05067004-006)
关键词
煤层气开发
地震勘探
地震属性分析
富气性预测
井位优选
CBM development
seismic exploration
seismic attribute analysis
rich gas prediction
well location selection and optimization
