| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Nuclear Magnetic Resonance Measurements of Original Water Saturation and Mobile Water Saturation in Low Permeability Sandstone Gas |
| GAO Shu-Sheng1,2**, YE Li-You3, XIONG Wei1, GUO He-Kun1, HU Zhi-Ming1
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1Research Institute of Petroleum Exploration and Development-Langfang, Langfang 065007
2School of Energy Resources, China University of Geosciences, Beijing 100083
3Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007
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| Cite this article: |
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GAO Shu-Sheng, YE Li-You, XIONG Wei et al 2010 Chin. Phys. Lett. 27 128902 |
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Abstract We use nuclear magnetic resonance (NMR) and centrifugation to measure the original water saturation and mobile water saturation of cores from the Xujiahe low permeability sandstone gas reservoir, and compare the NMR results with the corresponding field data. It is shown that the NMR water saturation after 300 psi centrifugation effectively represents the original water saturation measured by weighing fresh cores. There is a good correlation between mobile water saturation and the water production performance of the corresponding gas wells. The critical mobile water saturation whether reservoir produces water of the Xujiahe low permeability sandstone gas is 6%. The higher the mobile water saturation, the greater the water production rate of gas well. This indicates that well's water production performance can be forecasted by mobile water saturation of cores.
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| Keywords:
89.20.Bb
93.85.Jk
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Received: 23 June 2010
Published: 23 November 2010
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| PACS: |
89.20.Bb
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(Industrial and technological research and development)
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93.85.Jk
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(Magnetic and electrical methods)
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