Petroleum generation and expulsion in middle Permian Lucaogou Formation, Jimusar Sag, Junggar Basin, northwest China: assessment of shale oil resource potential

2017 ◽  
Vol 52 (6) ◽  
pp. 1032-1048 ◽  
Author(s):  
Liming Zhou ◽  
Xiongqi Pang ◽  
Luya Wu ◽  
Lichun Kuang ◽  
Hong Pang ◽  
...  
Keyword(s):  
Junggar Basin ◽  
Northwest China ◽  
Middle Permian ◽  
Shale Oil ◽  
Resource Potential ◽  
Lucaogou Formation ◽  
Petroleum Generation

Characteristics of Micro/Nano Pores and Hydrocarbon Accumulation in a Continental Shale Oil Reservoir—A Case Study of the Lucaogou Formation in the Jimsar Sag, Junggar Basin, Northwest China

2021 ◽  
Vol 21 (1) ◽  
pp. 262-273
Author(s):  
Jun Jin ◽  
Zhao Yang ◽  
Xuekun Chen ◽  
Lulu Li ◽  
Hongxia Yang ◽  
...  
Keyword(s):  
Junggar Basin ◽  
Ct Scanning ◽  
Northwest China ◽  
Oil Reservoir ◽  
Shale Oil ◽  
Pore Characteristics ◽  
Mercury Analysis ◽  
Lucaogou Formation ◽  
Jimsar Sag ◽  
Intercrystalline Pores

This paper comprehensively studies the micro- and nanometer-scale pore characteristics and structure of the Lucaogou Formation shale oil reservoir in the Jimsar Sag using high-pressure mercury analysis, field emission scanning electron microscopy and nano-CT scanning technology. In addition, the occurrence states of crude oil in pores are analyzed combined with macro–micro characteristics. The results show that there are various reservoir types; the main reservoir pore structure is on the micron and nanometer levels, with other void spaces including intergranular pores, interparticle dissolution pores, intercrystalline pores and microfissures. Nanopores are generally oil-bearing and mostly in the adsorption state, which changes the traditional understanding that micron pores are the only microscopic pores in the reservoir and confirms that shale oil exists in ‘sweet spots’ and mud-shale sections of the Lucaogou Formation.

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