致密砂岩微观孔隙非均质性定量表征及储层意义——以鄂尔多斯盆地X地区山西组为例

发布时间：2018-04-15 13:24

本文选题：孔隙结构 + 微观尺度　；参考：《石油实验地质》2017年04期

【摘要】：以鄂尔多斯盆地东部X地区山西组致密砂岩储层为例,采用Matlab编程,提出铸体薄片图像面孔率提取的新方法,基于面孔率提出非均质系数U定量表征微观孔隙非均质性,并讨论非均质系数U和储层物性关系及微观孔隙非均质性的储层意义。结果表明,X地区致密砂岩储层微观非均质性强烈,微观孔隙分布十分不均匀;非均质系数U与孔隙度和渗透率均为负相关关系,非均质系数U越大,储层非均质性越强,储层物性越差,反之储层物性越好;致密砂岩储层微观非均质性控制着孔隙(储集空间和渗流空间)的微观发育特征,致密砂岩储层非均质系数定量评价有利于指导后期开发、开采中优质层位的圈定。
[Abstract]:Taking the tight sandstone reservoir of Shanxi formation in the eastern part of Ordos Basin as an example, a new method for extracting the face rate of cast thin slice image is proposed by Matlab programming, and the heterogeneity coefficient U is presented to quantitatively characterize the microscopic porosity heterogeneity.The relationship between the heterogeneity coefficient U and reservoir physical properties and the reservoir significance of microscopic pore heterogeneity are also discussed.The results show that the microcosmic heterogeneity of tight sandstone reservoir is very strong and the distribution of microscopic pores is very uneven, the heterogeneity coefficient U is negatively related to porosity and permeability, and the greater the heterogeneity coefficient U is, the stronger the reservoir heterogeneity is.The worse the reservoir physical property is, the better the reservoir physical property is, the microcosmic heterogeneity of tight sandstone reservoir controls the microscopic development characteristics of pore (reservoir space and percolation space), and the quantitative evaluation of heterogeneity coefficient of tight sandstone reservoir is helpful to guide the later development.The delineation of high quality strata in mining.
【作者单位】：中国石油大学(北京)煤层气研究中心;中国石油大学(北京)石油工程学院;中国石油大学(北京)地球科学学院;中国矿业大学资源与地球科学学院;煤层气资源与成藏过程教育部重点实验室;
【基金】：国家“十三五”科技重大专项(2016ZX05066) 煤层气资源与成藏过程教育部重点实验室(中国矿业大学)开放基金项目(2015-007)资助
【分类号】：P618.13

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