Chinese Journal of Magnetic Resonance >

2017 , Vol. 34 >Issue 2: 206 - 213

DOI: https://doi.org/10.11938/cjmr20170210

NMR On-Line Measurement of Stress Sensitivity of Tight Matrix Limestone Cores in a Karstic Reservoir

  • CHENG Qian ,
  • LIU Nai-gui ,
  • ZHOU Yang ,
  • LIU Zhong-chun ,
  • FANG Tao ,
  • ZHU Tao-tao ,
  • WANG Wei-min
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  • 1. Research Institute of Petroleum Exploration & Production, SINOPEC, Beijing 100083, China;
    2. Institute of Geology & Geophysics, Chinese Academy of Science, Beijing 100029, China;
    3. Institute of Quantum Electronics, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871, China;
    4. School of Geosciences & Technology, China University of Petroleum, Qingdao 266580, China

Received date: 2016-04-07

  Revised date: 2017-04-20

  Online published: 2017-06-05

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Abstract

Compared to the conventional reservoirs, karstic carbonate reservoir has more complex structure, larger difference in the size of fracture cavity, and the property that the fracture functioning mainly as a way for communication. It is difficult to study flow characteristics and distribution in karstic carbonate reservoir with the conventional methods. In this paper, we had built an on-line NMR instrument to test the stress sensitivity of 15 Tahe Oilfield tight matrix limestone cores. The T2 spectrum was measured at each stage. On the basis of the T2 spectra measured, the pore size, porosity and permeability changes of the limestone rocks were determined. It was shown that the on-line NMR measurement technology can be employed in the laboratory tests to provide microscopic information on the changes of core permeability.

Key words： stress sensitivity; T2 spectrum; permeability; low-field NMR; tight matrix limestone

Cite this article

CHENG Qian , LIU Nai-gui , ZHOU Yang , LIU Zhong-chun , FANG Tao , ZHU Tao-tao , WANG Wei-min . NMR On-Line Measurement of Stress Sensitivity of Tight Matrix Limestone Cores in a Karstic Reservoir[J]. Chinese Journal of Magnetic Resonance, 2017 , 34(2) : 206 -213 . DOI: 10.11938/cjmr20170210

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