They are deduced to three main types: hot chemical,biogenesis and magma genesises.The distribution of hydrogen sulfide is controlled by sedimentary facies.

• 硫化氢分布受沉积相控制,膏盐岩系和生油岩组合是最有利于生成硫化氢的沉积岩系组合,油源分析对比可间接反映硫化氢来源及成因。