深层油气藏的流体特征及成藏条件

深层油气藏已成为油气发现的重要组成部分。在总结国外深层油气藏勘探开发经验的基础上，阐述了油气的赋存深度和高温高压下的流体特征，以及深部油气成藏的地质条件和形成圈闭的控制因素等。由于良好的盖层封闭和次生成岩作用，深部储层一般具有较大的储集空间和油气储量。对于裂谷盆地，除了构造油气藏外，浊积扇体岩性油气藏亦应作为勘探重点。

Fluid characteristics and reservoir forming condition in deep oil and gas reservoirs

Deep oil and gas reservoir has become the important part of oil - gas discovery. Based on summarizing the exploration and exploitation in abroad deep oil and gas reservoirs,some factors are discussed including hydrocarbon existence depth, fluid characteristics under high temperature and high pressure conditions, and the geologic setting of the deep oil and gas reservoirs andcontrol factors of trap forming. It points out that the deep reservoir commonly has large reservoir space and hydrocarbon reserves due to good cap enclosure and secondary diagenesis. Li thological oil - gas pool of urbidite fan should be regarded as one of the exploration key for the rift basin except for structural hydrocarbon reservoir.