Influence of stress sensitivity on microscopic pore structure and fluid flow in porous media
Influence of stress sensitivity on microscopic pore structure and fluid flow in porous media
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应力敏感性对多孔介质微观孔隙结构和流体流动的影响
DOI：
10.1016/j.jngse.2016.09.061
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发表时间：
2016-11
影响因子：
--
通讯作者：
Yao Jun
中科院分区：
文献类型：
--
作者：
Yang Yongfei;Zhang Wenjie;Gao Ying;Wan Yujin;Su Yunhe;An Senyou;Sun Hai;Zhang Lei;Zhao Jianlin;Liu Lei;Liu Pengfei;Liu Zhihui;Li Aifen;Yao Jun
目前，人们已经在宏观尺度上进行了大量的应力敏感性试验。储层孔隙结构复杂，非常规致密砂岩储层的孔隙结构尤为复杂。因此，应力敏感性对孔隙空间的变化有很大的影响。系统研究孔隙尺度下的应力敏感性对提高原油采收率具有重要意义。本文基于CT扫描技术，可以捕捉岩心样品的真实的孔隙特征，并结合数字岩心和孔隙网络模型，获得了有效应力与孔隙结构之间的关系。首先介绍了数字岩心的构建和基于CT扫描提取孔隙网络模型的理论和方法。通过CT扫描获得岩心的三维图像，经滤波、分割后建立数字岩心。通过对提取的孔隙网络模型进行几何拓扑结构分析，得到岩石结构特征，并通过数值模拟进行流体流动分析。其次，进行了应力敏感性试验和分析。在碳纤维夹芯保持器中进行了应力敏感性实验，并在一系列压力下对芯进行了扫描。获得了一系列压力下的数字岩心和孔隙网络模型，分析了相应的孔隙结构特征和流体流动规律。最后，将这些方法应用于中高渗透砂岩和致密砂岩。获得了这些砂岩的应力敏感性，并进行了比较。本文提出了孔隙尺度下的应力敏感性评价方法，并在油田开发中得到了实际应用。
At present, large quantities of experiments related to stress sensitivities on the macroscale have been conducted. Pore structure is complicated, especially in unconventional reservoirs of tight sandstone. As a result, stress sensitivity has a great influence on changing the pore space. This is of great significance for enhancing oil recovery to systematically study the stress sensitivity at the pore scale. In this paper, based on CT scanning technology, which can capture the real pore space characteristics of the core samples, and combined with a digital core and pore network model, the relationships between the effective stress and the pore structure are obtained. First, the theory and method of constructing the digital core and extracting the pore network model according to CT scanning are introduced. The 3D core image could be obtained after CT scanning, and the digital core is established after filtering and segmentation. The rock structure characteristics are obtained from analyzing the geometry-topology structure of the extracted pore network model, and the fluid flow analysis is conducted by numerical flow simulation. Second, the stress sensitivity experiments and analysis are conducted. Stress sensitivity experiments are performed in the carbon fiber core holder, and the core is scanned under a series of pressures. Digital cores and pore network models under a series of pressures are obtained, and the corresponding pore structure characteristics and fluid flow laws are analyzed. Last, these methods are employed in middle-high permeability sandstone and tight sandstone. The stress sensitivities of these sandstones are achieved and compared. In this paper, the stress sensitivity evaluation method at pore-scale is developed, which has the practical application of oilfield development.
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DOI：
10.2118/894-g
发表时间：
1958-06
期刊：
Journal of Petroleum Technology
影响因子：
--
作者：
A. McLatchie;R. A. Hemstock;J. W. Young
通讯作者：
A. McLatchie;R. A. Hemstock;J. W. Young
DOI：
10.1615/intjmultcompeng.2014010500
发表时间：
2015
影响因子：
1.4
作者：
Jun Yao;Rongrong Hu;Chenchen Wang;Yongfei Yang
通讯作者：
Jun Yao;Rongrong Hu;Chenchen Wang;Yongfei Yang
一种基于数字岩石的体素放大新方法
DOI：
10.1615/intjmultcompeng.2015013447
发表时间：
2015
影响因子：
1.4
作者：
Yang Yongfei;Wang Chenchen;Yao Jun;Gao Ying
通讯作者：
Gao Ying
DOI：
10.1016/0148-9062(82)90888-9
发表时间：
1982-01-01
影响因子：
7.2
作者：
NOORISHAD, J;AYATOLLAHI, MS;WITHERSPOON, PA
通讯作者：
WITHERSPOON, PA
影响因子：
4.7
作者：
H. Vogel;K. Roth
通讯作者：
H. Vogel;K. Roth