水城—纳雍地区构造控制下的煤层气成藏特征  

Characteristics of CBM Reservoir Formation under Tectonic Control in Shuicheng-Nayong Area

作　　者：窦新钊[1] 俞显忠 胡广青[1] 赵志义[1] 易小会[1] 朱建刚[1] 

机构地区：[1]安徽省煤田地质局勘查研究院,安徽合肥230088

出　　处：《非常规油气》2015年第2期5-9,共5页Unconventional Oil & Gas

基　　金：国家自然科学基金项目(40730422;40672101);国家重大科技专项项目(2011ZX05034)

摘　　要：贵州省煤层气资源丰富,水城—纳雍地区是研究煤层气成藏特征的有利区域。本文在系统分析煤层气成藏地质背景的基础上,结合构造埋藏史和生烃演化史数值模拟研究,探讨水城—纳雍地区煤层气成藏特征及构造对成藏的控制作用。结果表明,在煤田勘探资料约束下,数值模拟结果可信,过程合理,较好地反映了水城—纳雍地区上二叠统煤层的构造埋藏史和生烃演化史。在构造作用控制下,水城—纳雍地区具有如下煤层气成藏特征:向斜控气;中新生代构造抬升剧烈,气藏埋深小;多期生烃作用,煤层气含量高;成藏过程复杂且分异明显。There are rich coalbed methane （CBM） resources in Guizhou Province, and Shuicheng-Nayong area is favorable for study on CBM reservoir forming characteristics. So, based on the system analysis of geologic setting of CBM reservoir forming, combined with the modeling study of tectonic burial history and mature evolution history, the reservoir forming characteristics of CBM and its tectonic control of reservoir forming in Shuicheng-Nayong area were discussed. The research showed that the results of numerical simulation were reliable, and process was rational under the constraints of coal, exploration data, tectonic burial history and mature evolution history of upper Permian coal seams in Shuicheng-Nayong area were reflected well. CBM reservoir formation under tectonic control in Shuicheng-Nayong area has the following features： it is characterized by syncline-controlled gas; the scope of tectonic uplift is large in Mesozoic-Cenozoic, and the depth of CBM reservoir is small ; CBM content is high for multiple phases of hydrocarbon generation ; the process of CBM reservoir formation is complex and fractionation in different zone is clear.

关 键 词：水城—纳雍地区 煤层气 成藏特征 构造控制 数值模拟 

分 类 号：P618.13[天文地球—矿床学]