页岩气成藏条件及中国页岩气勘探风险

分析了页岩气的成藏要素（烃源岩有机质丰度、成熟度、储集层孔隙及埋深等条件）及各要素与含气量之间的关系后发现，应在页岩厚度大、有机碳含量高于0.5%、有机质成熟度大于0.4%、有机质生烃形成的孔隙和裂缝较发育的地区寻找有工业价值的页岩气藏。页岩气储集层具有测井曲线自然伽马值高、体积密度值低、电阻率值高等特征。中国页岩气勘探应重点考虑页岩储集层孔隙（裂缝）发育、储集层埋深大和钻采技术薄弱等风险因素。

Hydrocarbon Accumulation Conditions of Shale Gas and Exploration Risks in China

The contributing factors of organic matter abundance, maturity, shale porosity and burial depth in source rocks were analyzed, and their relationships with gas content were determined. It is concluded that the area with thick shale, high total organic content (over 0.5%), moderate thermal maturity (higher than 0.4%) and well?developed pore spaces and fractures should be the next potential prospecting target with commercial values. The shale gas exploration in China should focus on such an area and take into account these risk factors of pore/fracture development, shale burial depth and drilling/production technologies as required