Preliminary study of reasonable pressure difference including stress sensitivity in well block Shun 9
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摘要: 以塔河油田顺9井区砂岩油藏为例,采用3种不同计算方法,分别计算了低孔、低渗、含微裂缝的油藏应力敏感下合理压差,对比3种计算方法的优缺点,优选出适合顺9井区的计算方法并得出应力敏感下合理压差。结果表明:顺9井区临界压差为22.10 MPa。将此结果应用于顺9CH气举时助排深度计算,建议顺9CH气举助排深度不超过888.53 m。Abstract: Taking the sandstone reservoirs in well block Shun 9 in the Tahe Oil Field as an example, the reasonable pressure difference including stress sensitivity in reservoirs with low porosity, low permeability and microfracture is calculated with 3 different methods. The method which is most favorable for the study area is chosen after comparison. The critical pressure difference in well block Shun 9 is calculated as 22.10 MPa. The result is applied in the gas lift depth calculation in Shun 9CH, that is, under 888.53 m.
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