中南大学学报（自然科学版）2016，Vol.47Issue(6)：1973-1980,8.DOI:10.11817/j.issn.1672-7207.2016.06.021
黔北地区志留系下统龙马溪组页岩气成藏潜力
Shale gas accumulation potential of Lower Silurian Longmaxi formation in northern Guizhou
摘要
Abstract
Based on comprehensive analysis of outcrops observation and sample testing,the formation conditions of shale gas in Lower Silurian Longmaxi formation shale of northern Guizhou were analyzed, such as sedimentary characteristics and distribution, geochemical characteristics, burial thermal evolution and reservoir characteristics. The results show that the Longmaxi formation shale in the study area, characterized by extensive distribution (residual area of about 14 600 km2), big thickness (maximum of up to 200 m), fine kerogen type (sapropel type), rich organic matter content (residual total organic carbon mass fraction w(TOC) of 3.92%), high air content (saturated adsorption amount of 2.77%), high thermal evolution (vitrinite reflectance of 2.68%), appropriate depth (a large area of 1−2 km in depth), high brittleness mineral content(average of 43.2%), strong heterogeneity (great changes of brittleness mineral content in horizontal and vertical), low porosity (concentrated in 4%−10%) and low permeability (average of 0.088×10−3 μm2), have good accumulation potential geological and fracturing mining conditions, and Xishui−Renhuai Areas and Daozhen−Wuchuan−Yanhe Areas are the most favorable exploration zones. Longmaxi formation shale in the study area is abundant in shale gas resources, and the values of resources calculated by probability volume should be (3.52−4.69)×1012 m3, which match well with those obtained by geological analogy method.关键词
黔北地区/龙马溪组/页岩气/成藏潜力Key words
northern Guizhou/Longmaxi formation/shale gas/accumulation potential分类
能源科技引用本文复制引用
郭世钊,郭建华,刘辰生,张琳婷,郭祥伟,肖盼..黔北地区志留系下统龙马溪组页岩气成藏潜力[J].中南大学学报（自然科学版）,2016,47(6):1973-1980,8.基金项目
中国地质调查局地质调查工作项目(1212011120976-01)；湖南省自然科学基金资助项目(12JJ4036)(Project (1212011120976-01) supported by the China Geological Survey Geological Survey Project （1212011120976-01）
Project(12JJ4036) supported by the Hunan Provincial Natural Science Foundation of China) （12JJ4036）
