【摘要】 研究煤系地层陷落柱特征 ,有助于提高煤层气的勘探效益。陷落柱与区域地层产状、岩性特征不一致 ,岩性杂乱 ,角砾岩发育 ,岩石破碎、易垮塌、井径大 ,地震标准反射波中断或消失 ,出现异常波。根据地层、构造特征和地震反射特征可以识别陷落柱 ,并根据地震资料可以预测陷落柱。陷落柱影响煤系层气的分布 ,陷落柱发育区煤层气含量低更多还原

【Abstract】 The study on the characteristics of karst collapse in coal measure strata is helpful to improve the benefit of coalbed methane exploration. The occurence of formation and lithological composition in karst collapse is different from regional strata. There are many lithological compositions in karst collapse, and the main composition is breccia. The composed rock is crushed, easy to collapse and easy to enlarge the barehole. The seismic standard reflection event discontinues or disappears and abnormal event appears. The karst collapse can be predicted according to the seismic data. Karst collapses influence the distribution of coalbed methane. The content of coalbed methane is low in the karst collapse well developed areas.更多还原