Petrophysical characterisation of tight sandstone gas reservoirs using nuclear magnetic resonance: a case study of the upper Paleozoic strata in the Kangning area, eastern margin of the Ordos Basin, China

2018 ◽  
Vol 65 (6) ◽  
pp. 863-875 ◽  
Author(s):  
Y. Y. Huyan ◽  
X. Q. Pang ◽  
T. S. Liu ◽  
F. J. Jiang ◽  
X. Z. Chen ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Ordos Basin ◽  
Gas Reservoirs ◽  
Tight Sandstone ◽  
Eastern Margin ◽  
Upper Paleozoic ◽  
The Ordos Basin ◽  
Nuclear Magnetic

scholarly journals Multifractal characteristics of shale and tight sandstone pore structures with nitrogen adsorption and nuclear magnetic resonance

2020 ◽  
Vol 17 (5) ◽  
pp. 1209-1220
Author(s):  
Fu-Yong Wang ◽  
Kun Yang ◽  
Yun Zai
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Specific Surface ◽  
Pore Size ◽  
Ordos Basin ◽  
Tight Sandstone ◽  
Pore Structures ◽  
Pore Size Distributions ◽  
Multifractal Spectra ◽  
Nuclear Magnetic

Abstract Based on the experiments of nitrogen gas adsorption (N2GA) and nuclear magnetic resonance (NMR), the multifractal characteristics of pore structures in shale and tight sandstone from the Chang 7 member of Triassic Yanchang Formation in Ordos Basin, NW China, are investigated. The multifractal spectra obtained from N2GA and NMR are analyzed with pore throat structure parameters. The results show that the pore size distributions obtained from N2GA and NMR are different, and the obtained multifractal characteristics vary from each other. The specific surface and total pore volume obtained by N2GA experiment have correlations with multifractal characteristics. For the core samples with the similar specific surface, the value of the deviation of multifractal spectra Rd increases with the increase in the proportion of large pores. When the proportion of macropores is small, the Rd value will increase with the increase in specific surface. The multifractal characteristics of pore structures are influenced by specific surface area, average pore size and adsorption volume measured from N2GA experiment. The multifractal characteristic parameters of tight sandstone measured from NMR spectra are larger than those of shale, which may be caused by the differences in pore size distribution and porosity of shale and tight sandstone.

scholarly journals A new multi-disciplinary integrated steering technology for horizontal wells in tight sandstone gas reservoirs: A case study of the Ordos Basin

2020 ◽  
Vol 7 (4) ◽  
pp. 328-336
Author(s):  
Shixiang Fei ◽  
Yubin Du ◽  
Yijun Wang ◽  
Nan Chen ◽  
Yang Gao ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Horizontal Wells ◽  
Gas Reservoirs ◽  
Tight Sandstone ◽  
The Ordos Basin
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