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鄂尔多斯盆地延长组长101储层是典型的低孔低渗储层,储层的物性研究有助于确定储层含油特征,为确定储层产油能力、有利区优选等方面的研究提供依据。通过建立米产液量和声波时差的对应关系确定声波时差下限,而声波时差是测井系列中能够较准确反映孔隙度的参数,可据声波时差和储层物性之间的相关关系,确定吴起-定边地区长101孔隙度和渗透率下限分别为:8.4%、0.35×10-3μm2。
Chang 101 reservoir of Yanchang Formation in Ordos Basin is a typical low-porosity and low-permeability reservoir. Reservoirs physical properties are helpful to determine the oil-bearing characteristics of reservoirs and provide basis for determining the production capacity of oil and gas reservoirs. The lower limit of acoustic time difference is determined by establishing the relationship between the amount of liquid produced by rice and the time difference of acoustic wave. The acoustic time difference is a parameter that can accurately reflect the porosity in the logging series. According to the correlation between acoustic time difference and reservoir physical properties, - The lower limit of porosity and permeability of Changding 101 is 8.4% and 0.35 × 10-3μm2, respectively.