低渗透砂岩储层微观孔隙特征研究进展

Advances in Geo-Energy Research, 2018, 2(2): 122-134

原文网址：http://www.astp-agr.com/index.php/Index/Index/detail?id=55

       随着近几年来石油需求量越来越大，低渗、特低渗透储层已经成为油气勘探领域的热点。该类型储层在沉积、成岩以及流体自身物理化学性质的共同影响下，相比常规储层具有更加复杂的微观孔喉特征，以及具有更强的宏观与微观非均质性。从业人员采用多种先进实验手段相结合的方法，分别从直接观察和间接测试这两个角度对低渗、特低渗透储层微观孔隙特征展开研究已经成为主流。

       最近，长庆油田工程师黄胜玉联合西北大学、中国石油大学（北京）等单位的博士研究生，从生产单位的实际需求出发，对近年来发展起来的低渗透砂岩储层微观孔隙特征研究的手段进行了系统的介绍，内容涵盖了扫描电镜、铸体薄片、物性测试手段、高压压汞、恒速压汞、核磁共振的测试手段及其运用成果，并简单的介绍了低渗透砂岩储层研究的发展史，旨在为该领域从业人员在进行研究工作时提供一定的帮助。

Recent advances on microscopic pore characteristics of low permeability sandstone reservoirs

Shengyu Huang, Yiying Wu, Xiaobo Meng, Liwen Liu, Wei Ji

(Published: 2018-03-10)

CorrespondingAuthor and Email: Shengyu Huang, corner090808@163.com

Citation:   Huang, S., Wu, Y., Meng, X., Liu, L., Ji, W. Recent advances on microscopic pore characteristics of low permeability sandstone reservoirs. Advances in Geo-Energy Research, 2018, 2(2): 122-134, doi: 10.26804/ager.2018.02.02

ArticleType: Invited article

Abstract：

    Understanding oil and gas production from low-permeability sandstones requires an understanding of the porosity. This paper reviews the analysis of data from hundreds of cores’ microscopic pore characteristics of low-permeability sandstone reservoirs from Chang 6 reservoir of Ji-yuan oilfield in ordos basin. And this paper is to embody the methods used in the study of low permeable sandstone reservoir in recent years and the results reflected in it. For example, by analyzing the rock of Chang 6 reservoirs, it can be seen that the rock of Chang 6 reservoirs is mostly developed by Feldspar Sandstone, its internal pore types are diverse, the pore size is mainly small pore type, the second is fine pore, and has continuous spectral distribution, and the distribution is single peak shape.

     Different methods have been used to study low-permeability sandstones, including scanning electron microscope, casting thin plate, physical test means, high-pressure mercury, constant velocity mercury, NMR experiments. The results show that the pore-throat combination types of reservoir are mainly small pore-micro-larynx. The main type of reservoir throat is mainly flaky throat. The extremely strong heterogeneity in the layer is the key to the efficiency and effect of water flooding. Therefore, the exploration and development of low permeable sandstone reservoirs can be guided by the analysis of relevant parameters.

Keywords: Microscopic pore characteristics, low permeability, sandstone, mercury, NMR

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