层序地层学在煤层气勘探中的应用

APPLICATION OF SEQUENCE STRATIGRAPHY IN COALBED METHANE EXPLORATION

本文从层序地层学理论角度解释了煤层气一些地质规律 ,认为采用层序划分、对比等层序地层学理论方法来预测煤储层分布、赋存规律 ,研究煤层气生、储条件及其资源等更为科学、可行 ;并在对煤层的有机地化特征、煤岩类型、煤质成分、煤储层的渗透性变化解释上 ,具有理论上的先进性 ;

In the paper,on the basis of studying some cases,it is considered that some geological laws of coalbed methand may be interpreted from the angle of sequence stratigraphy;it is more scientific and feasible to predict the distribution and occurrence laws of coal reservoirs and investigats the generation,storage conditions and resources of coalbed methane through applying these theoretical methods of sequence stratigraphy,such as sequence division and correlation,etc.,the interpretations of the organic geochemical characteristics,coal petrologic type and material composition of coalbeds and the change in permeabilities of coal reservoirs are theoretically advanced;and the enrichment level of coalbed methane in some region may be also predicted by setting up the theoretic relation between the systematic domain and the preservation condition of coalbed methane.