【作者】 付红军；

【导师】 孙小洁； 施尚明；

【作者基本信息】 大庆石油学院 ， 矿产普查与勘探， 2009， 硕士

【摘要】 本文针对双河油田核三段Ⅱ油组的区域地质背景、沉积条件和成岩演化特征,应用标志层法、层序地层学、邻井对比等方法将双河油田核三段Ⅱ油组细分为6个小层27个沉积时间单元。并根据测井相模式,联系小层对比结果对沉积微相进行研究。本文在前人的基础上对各口井进行了标准化处理,统一了不同井的不同量纲,对双河油田核三段孔隙度、渗透率又重新统一标准统一解释。储层微观非均质性研究,通过镜下观察分析碎屑颗粒成分,确定了孔隙、喉道的大小、分布、配置及连通性,以及岩石的组分、颗粒排列方式、基质含量及胶结物的类型等来说明储集层微相的非均质性。层内非均质性研究,根据储层岩性及电性特征,将层内夹层划分为三类,统计单砂层内夹层的个数、累积夹层厚度、夹层频率及夹层密度,根据夹层在不同沉积微相砂体内的频率及密度,总结夹层分布特征。并通过不同沉积韵律类型分级及计算砂层内渗透率的变异系数、突进系数以及级差来说明储层的非均质特征。层间非均质性研究,通过分层系数、砂岩密度及重叠系数来描述砂层的发育与分布;采用典型曲线对比法来确定隔层岩性及其厚度并总结隔层的分布特征。平面非均质性研究,根据不同沉积微相砂体统计其几何形态参数;根据每口井的测井解释资料得到了一组反映储层特征在平面上变化的参数,其中包括储层厚度分布、孔隙度以及渗透率,并且成图。基于以上研究,评价双河油田核三段Ⅱ油组的储层非均质性,对油田开发和井网的调整都具有重要的意义。更多还原

【Abstract】 In this paper, about the regional geological setting, depositional conditions and diagenetic evolution features, using the key bed method, sequence stratigraphy and the contrast of adjacent wells, we can divide 2nd oil group He-3 member in Shuanghe oilfield into 6 small layers and 27 depositional time units. And accordding to the electrofacies mode, have studied the sedimentary microfacies lingking the small layer contrasted result.On the basis of our predecessors’ achievements, we have a standardized treatment to all wells in this paper, unifying the different dimension to different wells, and reunit the standard to uniformly interpretate the porosity and permeability of He-3 member in Shuanghe Oilfield.In the reservoir microscopic heterogeneity study, through the analysis of clastic particles composition at the microscope, we can determine the size, distribution, configuration and connectivity of pore and throat, as well as the rock composition, particle arrangement, matrix content and cement type and so on, to illustrate the microfacies reservoir heterogeneity.During on the study in layer heterogeneity, based on lithology and electricity characteristics of reservoir, we can divide the intraformational bed into three types. Through counting the number of interlayer in the single layer, the thickness of accumulation interlayer, frequency and density of interlayer, based on the frequency and density of interlayer in different sedimentary microfacies sandbody, we can summarize the distribution characteristics of interlayer. We can illustrate the reservior heterogeneity by the classifying to different types sedimentary rhythm and counting the permeability variation coefficients, maxmean ratio and level difference in sand layers.To study the interlaminar heterogeneity, we carry the stratification coefficient, sand density and overlap coefficient to descripe the development and distribution of sand; and using typical contrast curve to determine the lithology and thickness of insulating layers and sum up the distribution characteristics of insulation layer.During the studies of graphic heterogeneity, we can count the geometry parameters according to different sedimentary microfacies sandbody. Under the log interpretation data of each well, we get a set of parameters which can reflect the change of the reservoir characteristics in the plane, including reservoir thickness distribution, porosity and permeability, and mapping.Based on the above studies, the evaluation of reservoir heterogeneity, which to 2nd oil group He-3 member in Shuanghe oilfield, have the great significance to oilfield development and the well network adjustion.更多还原