摘要
对湘西北下震旦统陡山陀组页岩气有利层位进行相应的地球化学、物性特性分析，并结合地质保存条件等因素对含气页岩层进行了综合评价，得到区内页岩主要物化指数：TOC为0.52%～6.79%，均值为2.25%；Ro为2.38%～2.87%，均值为2.56%，干酪根类型为Ⅰ型；孔隙度为0.6%～8.7%，平均为3.9%，渗透率均小于0.04×10^-3μm^2，属低孔低渗类型。页岩埋深主要在2000～5000m,且有效厚度基本大于20m，具有页岩气成藏条件，页岩气勘探开发前景良好。
Corresponding geochemical, physical property analyses have been carried out for favorable shale gas horizons in lower Sinian Doushantuo Formation in northwestern Hunan. The comprehensive evaluation on gas-bearing shale strata combined with factors includ-ing geological hosting condition has gotten main physical and chemical indices as follows： TOC 0.52%-6.79%, average 2.25%; Ro 2.38%-2.87%, average 2.56%;kerogen type I;porosity 0.6%-8.7%, average 3.9%;permeability all less than 0.04×10^-3μm^2, thus be-longs to low porosity, permeability type. Buried depth of shale strata is mainly within 2 000~5 000m, effective thickness basically larger than 20m thus provided with shale gas reservoiring condition, and excellent shale gas exploration and exploitation prospect.
出处
《中国煤炭地质》
2014年第6期5-9,共5页
Coal Geology of China
基金
中央地质矿产调查评价专项地勘基金项目(201203084)
关键词
陡山陀组
页岩气
保存条件
埋深
湘西北
Doushantuo Formation
shale gas
hosting condition
TOC
buried depth
northwestern Hunan
