EXPERIMENTAL STUDY ON PORE STRUCTURE OF LOW PERMEABILITY CORE WITH NMR SPECTRA

doi:10.3863/j.issn.1674-5086.2010.02.013

Abstract

Abstract:

Both NMR T2 distribution of core and capillary pressure can be used to characterize pore throat structures of rock to a certain extent.Theoretical analysis reveals a correlation between these two sets of data.NMR T2 distribution and capillary pressure of 10 low permeability cores from peripheral low permeability oilfield of Daqing are analyzed.Considering both nonlinear and mercury intrusion saturation is less than 100% to match，a new method that is used for constructing pore structure from NMR T2 distribution is put forward，and experiential expression is derived. The difference between two methods is analyzed.The result shows an improved precision and indicates that this method can provide reliable principle and methodology support for applying T2 distribution for the pore structure evaluation.

Key words: nuclear magnetic resonance, capillary pressure, mercury intrusion saturation, pore structure, low permeability reservoir

CLC Number:

TE311

WANG Xue-wu YANG Zheng-ming LI Hai-bo GUO He-kun. EXPERIMENTAL STUDY ON PORE STRUCTURE OF LOW PERMEABILITY CORE WITH NMR SPECTRA[J]. 西南石油大学学报(自然科学版), 2010, 32(2): 69-72.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.3863/j.issn.1674-5086.2010.02.013

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2010/V32/I2/69

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EXPERIMENTAL STUDY ON PORE STRUCTURE OF LOW PERMEABILITY CORE WITH NMR SPECTRA

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