【摘要】 针对苏里格东区致密气储层受多期不同类型沉积、成岩作用及构造等因素影响,储层孔隙空间小、孔隙类型结构和测井响应复杂,储层具有非均质、非线性分布的特点,利用岩石物理相分类研究致密气储层渗透率参数建模,确定评价储层岩石物理相的多种信息、划分方法及其分类建模技术.通过研究区致密气储层各类测井、岩心和试气资料,在建立不同类别岩石物理相储层渗透率参数解释模型研究中,分类模型数据点分布的拟合具有相对集中分布趋势及其较好的线性关系.特别是分类模型利用拟合度较好的密度、声波时差、自然电位、自然伽马、伽马钾、钍等曲线分别求取渗透率参数,并采用Hodges-Lehmann法综合评估后确定,明显改善和提高了致密气储层渗透率参数的计算精度和效果,有效地克服了致密气储层低信噪比、低分辨力的评价特征,为准确建立致密气储层参数建模提供了有效方法.更多还原

【Abstract】 The tight gas reservoir in the eastern of Sulige is influenced by multi-period sedimentary,diagenesis and structure.And it has small pore space,complex pore structure and complicated log response The reservoir is characterized by heterogeneity and nonlinearity distribution.So petrophysical facies classification can be used for the modeling of permeability in tight gas reservoir in order to determine the various information,division method and classified modeling of evaluating petrophysical facies of reservoir.The interpretation models of different types of permeability parameters which are corresponding to different reservoir petrophysical facies can be established by the use of logging,core and test data in the tight gas reservoir.The distribution fitting of data points in classified models has relatively concentrated distribution trend and a good linear relationship.The classified models which can calculate permeability parameters using the better fitting of density,acoustic,spontaneous potential,natural gamma ray,potassium gamma-rays and thorium and use Hodges-Lehmann method to assess,improve and enhance the accuracy and the effect of tight gas reservoir permeability parameters.It overcomes the characteristics of low signal to noise ratio and low resolution which exist in the tight gas reservoir and provides an effective method to accurately establish the model of the tight gas reservoir parameters.更多还原