【摘要】 针对塔河南油田三叠系凝析油气藏,探讨了识别气层的方法,划分出气油界面,为油田开发设计方案提供了可靠的依据。从声波时差指示气层的理论出发,提出了用气驱水岩心实验声波时差比与含气饱和度的关系来指示气层,并指出此方法的关键是求准完全含水的声波时差;给出了实验关系式和完全含水地层的时差拟合关系式,并结合声波时差差值法、三孔隙度差值法、三孔隙度比值法和计算的纯水声波时差与实际声波时差重叠等方法来识别气层和划分气油界面。这些方法具有快速、直观的特点,在塔河南油田三叠系解释中取得了很好的效果。更多还原

【Abstract】 In view of the Triassic condensate oil and gas reservoir in the southern Tahe oilfield,the identification method of the reservoir is studied.In the research,the oil/gas interface is discriminated,and this provides a reliable reference for the field development project.The method of using the relation between acoustictime and gas saturation to indicate the gas zone is proposed,and the acoustictime is gained from the core test of gas driving water.It also shows that it is critical to compute the acoustictime of the core filled with water and then give relational expression.Identification of gas zone and demarcation of the GOC could also use the acoustictime difference method,tri-porosity difference method,tri-porosity ratio method and superposition of pure water acoustictime and actual acoustictime.These methods are visual,direct,simple and time-saving and make good results from the interpretation on the Triassic of the Tahe oilfield.更多还原