坪北油田长7-长9油组特低渗透油层解释与应用

坪北油田长7-长9油组特低渗透油层与浅层的长4+5和长6油层有很大的不同,不能沿用老的解释标准。从分析长7-长9油组油藏特征及含油特点入手,研究测井解释模型,建立了孔隙度解释、渗透率解释、含油饱和度等测井解释模型;采用最小孔喉半径法、岩心含油产状法及试油试采法等研究手段,对油层有效厚度物性下限进行研究,确定了油层有效厚度物性下限标准及测井解释标准,以此为基础,进行了老井复查工作,重新解释油层293.6m/81层。

Interpretation of Chang 7 to Chang 9 Oil Set with Ultra-Low Permeability Reservoirs in Pingbei Oilfield

Old interpretation standard cannot be followed to interpret Chang 7 to Chang 9 Oil Set with ultra--low permeability reservoirs which are different from shallow Chang 4＋5 and Chang 6 reservoirs. Starting from the anal- ysis of reservoir features and oil properties of Chang 7 to Chang 9 oil set, this paper studies log interpretation model to establish such models to interpret porosity, permeability and oil saturation and also studies floor physical proper- ties of effective pay thickness by using pore throat radius method, core oil production method and oil test and produc- tion method to determine the floor standard and log interpretation standard. On the basis of the standards, review is made on maturing wells and reinterpretation is made for oil layer 293. 6 m/81 layers.