Mineralogy and element geochemistry of salinized lacustrine organic-rich shale in the Middle Permian Santanghu Basin: Implications for paleoenvironment, provenance, tectonic setting and shale oil potential

Liu, Bo; Song, Yu; Zhu, Kai; Su, Peng; Xiang, Yu‐Tao; Zhao, Wanchun

doi:10.1016/j.marpetgeo.2020.104569

Cited by 167 publications

(123 citation statements)

References 76 publications

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“…Unconventional reservoir resources now play an important role in total energy consumption. 1,2 For the unconventional reservoirs with low porosity and permeability, the surface roughness of the pores in a porous media would impact uid ow and heat transfer. 3 During oil production in two-phase ow in the subsurface, the roughness of the pore surface can affect the phase distribution of ow regimes and lead to variations in phase relative permeability.…”

Section: Introductionmentioning

confidence: 99%

Comparison of fractal dimensions from nitrogen adsorption data in shale via different models

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Comparison of fractal dimensions from nitrogen adsorption data in shale via different models

et al. 2021

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“…The discovery of Bakken shale oil in the United States has made the exploration and development of shale oil a hot topic. 1 The geological resources of lacustrine shale oil are huge in China. 1 To promote its industrial and commercial development is one of the important means to ensure national energy security.…”

Section: Introductionmentioning

confidence: 99%

“… 1 The geological resources of lacustrine shale oil are huge in China. 1 To promote its industrial and commercial development is one of the important means to ensure national energy security. At present, there have been many achievements in shale oil-related research, but there are still many unsolved key problems related to shale oil exploitation.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Shale Oil Reservoir and the Oil Enrichment Model for the First Member of the Lucaogou Formation, Western Jimusaer Depression, Junggar Basin, NW China

et al. 2021

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The Lucaogou Formation (Fm) in the Jimusaer depression is the first large-scale development of a terrigenous clastic sedimentary shale oil reservoir in China. Nearly one billion tons of shale oil resources have been discovered. However, the current exploration and development is concentrated in the eastern part of the sag. The limited geological understanding in the western area has restricted the prediction and development of “sweet spots” for shale oil. To help rectify this, we have studied the petrology, geochemistry, oil content, and pore properties of the second part of the first member (Mbr) of the Lucaogou Fm (P 2 l 1 2 ) in a typical well (Ji-X) in the western part of the sag. The results show that P 2 l 1 2 in the Jimusaer sag is a mixed fine-grained sedimentary system composed of sandstone, mudstone, and carbonate, which can be divided into seven types: dolomitic mudstone, calcareous mudstone, mudstone, mixed fine-grained rock, argillaceous limestone, sandstone, and argillaceous dolomite. The organic matter type of P 2 l 1 2 in well Ji-X is dominated by types I and II, and this is the best source rock in the whole exploration area of the Jimusaer sag. The overall oil saturation is relatively high, but the maturity of crude oil is low, and the overall oil quality is heavy, which is mainly controlled by the sedimentary environment and maturity of source rocks. Lithology and reservoir physical properties are the key to control oil content. The high-quality light oil reservoir lithology is argillaceous dolomite and sandstone. The higher the content of macropores and mesopores, the weaker the heterogeneity of the pore structure, and the better the oil content in the reservoir. There are four light oil sweet spots in the upper part (burial depth less than 4366 m), and there are excellent source rocks with high HI and high organic matter content near each sweet spot. This discovery of shale oil enrichment regularity will effectively guide the development of shale oil in continental lacustrine basins in other parts of the world.

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“…Understanding the pore structures is vital to assess the hydrocarbon bearing capacity of unconventional reservoirs, particularly shale formations. The nanometer to micrometer pores in such reservoirs (e.g., shale reservoirs) could act as the flow path for hydrocarbons, deciding the transportation ability during production [1][2][3][4][5][6][7][8]. Due to this, understanding the pore structures can reveal both pore space and flow abilities of the formation.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Particle Size on the Interpretation of Pore Structure of Shale by N2 Adsorption

Lyu

Zhou

et al. 2021

Geofluids

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Gas adsorption experiments are becoming one of the most common methods to quantify and analyze the pore structures of shale samples in the petroleum industry. In this regard, particle size of the specimen plays an important role in the results that could ultimately affect the pore structure interpretation. Hence, in this study, five shale samples at different thermal maturity levels are picked, and all are crushed into different groups of particle sizes: less than 40 mesh (<375 μm), less than 60 mesh (<250 μm), less than 80 mesh (<187.5 μm), and less than 100 mesh (<150 μm). Next, N2 adsorption is used to characterize the pore structures of the samples within different particle sizes. Furthermore, to interpret the data, several attributes such as the pore volume, surface area, fractal dimension (from the fractal analysis), and heterogeneity index (from the multifractal analysis), are studied and compared between the samples and particle size intervals to provide us with the effect that particle size could have on the pore structure analysis. The results showed that as the particle size varies, the pore structures of the shale samples could get affected. Based on the comparison of the results, it is recommended that a suitable particle size for the shale pore structure characterization in N2 adsorption experiments should be less than 60 mesh (<250 μm).

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Mineralogy and element geochemistry of salinized lacustrine organic-rich shale in the Middle Permian Santanghu Basin: Implications for paleoenvironment, provenance, tectonic setting and shale oil potential

Cited by 167 publications

References 76 publications

Comparison of fractal dimensions from nitrogen adsorption data in shale via different models

Comparison of fractal dimensions from nitrogen adsorption data in shale via different models

Evaluation of the Shale Oil Reservoir and the Oil Enrichment Model for the First Member of the Lucaogou Formation, Western Jimusaer Depression, Junggar Basin, NW China

The Effect of Particle Size on the Interpretation of Pore Structure of Shale by N2 Adsorption

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