摘要
根据页岩气发育条件及富集机理,结合油气资源评价方法的基本原则,系统归纳并建立了适合于不同地质及资料条件下的页岩气资源量与储量评价方法体系,包括:类比法(规模类比法、聚集条件类比法、综合类比法等)、成因法(产气历史分析法、剩余资源分析法、成因分析法等)、统计法(体积统计法、吸附要素分析法、地质要素分布概率风险分析法、产量分割法等)和综合分析法(蒙特卡洛法、打分法、盆地模拟法、专家赋值法、特尔菲综合法等)。通过对四川盆地川西坳陷页岩气地质条件和富集有利性的分析,优选上三叠统须家河组须五段为该地区页岩气发育且具有经济可采意义的有利层段。结合该地区实际地质条件,分别采用地质类比法、成因分析法和体积法对川西坳陷页岩气资源量进行了计算,运用特尔菲法加权得到该地区页岩气资源总量为1.47×1012～1.68×1012m3,均值为1.58×1012m3。平面上,页岩气勘探研究有利区主要分布于新场—德阳—广汉—新都—温江—大邑一线的成都凹陷。
According to shale gas development conditions and its accumulating mechanism,with the guide of basic principles for hydrocarbon resources assessment,the system of shale gas resources assessment method for different geological and data conditions has been systematically established as follows:analogy method,genetic method,statistical method,comprehensive analytical method,and so on.Based on the analysis of the shale conditions and accumulating profitability in the western Sichuan Depression,the fifth member of Xujiahe Formation has been optimized as the favorable one for shale gas development and its economic recoverable reserves.Considering the specific conditions of the study area,the geological analogy method,genetic analysis method and volume method are adopted to calculate the resources amount of shale gas in the western Sichuan Depression.Through the weighted average of Delphi,the shale gas resources amount in the western Sichuan Depression is estimated as 1.47-1.68 tcm,with the average value of 1.58 tcm.The favorable areas for shale gas exploration mainly are distributed along the line of Xinchang-Deyang-Guanghan-Xindu-Wenjiang-Dayi in the Chengdu sag.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2009年第12期130-134,共5页
Natural Gas Industry
基金
国家自然科学基金项目(编号:40672087
40472073)的资助
关键词
四川盆地西部
晚三叠世
页岩气
资源评价
类比法
成因法
统计法
综合分析法
有利区
Sichuan Basin,west,Late Triassic,shale gas,resource assessment,analogy method,genetic method,statistical method,comprehensive analysis method,favorable area for exploration
