摘要
本文从资源因素、煤储层因素及保存因素三个方面对沁水盆地和顺区块太原组15#煤层气富集规律进行了分析。结果表明:(1)顶板岩性和上覆盖层累厚度对煤层气的保存有一定的控制作用,与含气量相关性强;(2)构造对煤层气富集有较大的影响,距离断层/陷落柱越近,煤层保存条件越差,煤层含气性越差;(3)埋藏深度对渗透率、产能的影响不明显,但对煤层气含气量成明显正相关,反映埋深对煤层气选区评价具有一定程度的正面影响,对埋深单因素的评价标准应适当放宽。
In this paper, three factors-resources, coal reservoir and preservation were analysed on the enrichment regulation of 15# coal seam of Taiyuan formation, Heshun block, Qinshui basin. The study showed that： （1） Roof lithologic character and overlying strata accumulate thickness can control CBM preservation, which strongly rely on gas content. （2） Structures have greater influence on CBM enrichment. The closer the structures from the fault/collapse column are, the worse the the preservation conditions and the gas containing of coal seam are. （3） The influence of burial depth on penetration and capacity is not obvious. Nevertheless, the relationship between burial depth and gas content is obvious positive correlation which give an index to that burial depth has a certain degree of positive influence on CBM constituency evaluation. Evaluation criteria for single factor of burial depth should be relaxed appropriately.
出处
《中国煤层气》
2013年第2期12-15,共4页
China Coalbed Methane
关键词
煤层气
富集
控制因素
和顺区块
Coalbed methane
accumulation
control Law
Heshun block
