Chinese Journal of Magnetic Resonance

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Simulating NMR Responses in Porous Media Based on Reconstructed Digital Rock Image

CHENG Jia-jie,XIAO Li-zhi*,XU Wei,ZHANG Zong-fu,AN Tian-lin,DENG Feng,LIU Hua-bing   

  1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum,  Beijing 102249, China
  • Received:2012-11-14 Revised:2013-01-10 Online:2013-09-05 Published:2013-09-05
  • About author:*Corresponding author: Xiao Li-zhi,Tel:010-89733305,E-mail:xiaolizhi@cup.edu.cn.
  • Supported by:

    国家自然科学基金资助项目(41074102,41130417).

Abstract:

Micro-CT images revealing pore space are widely used in simulation studies of porous media. Compared to three-dimensional (3D) CT images, two-dimensional (2D) thin section images are more readily available. In this paper, a multiple-point statistics (MPS) method was implemented to construct 3D pore space using a stack of 2D thin section images of a rock, assuming the medium is isotropic. A random walk model describing Brownian movement of particles in the rock was then used to simulate the NMR responses. The simulation results obtained with the reconstructed 3D pore space image were found to be similar to those obtained with the true 3D micro-CT image. It is concluded that 3D image reconstructed from 2D thin section images shows similar pore space structure as than revealed by micro-CT images, and thus can be used for pore-scale simulation in porous media.

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