Differences in source kitchens for lacustrine in-source and out-of-source hydrocarbon accumulations

Zhao, Wenzhi; Zhang, Bin; Wang, Xiaomei; Wu, Songtao; Zhang, Shuichang; Liu, Wei; Wang, Kun; Zhao, Xianzheng

doi:10.1016/s1876-3804(21)60044-7

Cited by 21 publications

(13 citation statements)

References 12 publications

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“…Shales with oil potential mainly contains sapropelic organic matter, with a kerogen type of I or II, which exhibit a high effective organic carbon ratio and good oil generation potential (Chen and Jiang, 2015;Ma et al, 2018;Li M. W. et al, 2019b;Zou et al, 2019b;Zhao W. Z. et al, 2021). The kerogen type in shales exerts apparent control over their oil-bearing properties.…”

Section: Restriction Of Organic Matter Properties On Oil Retentionmentioning

confidence: 99%

“…Maturity affects the shale oil content based on the amount of oil generated and affects the hydrocarbon expulsion ability according to the composition of evolution products. With increasing thermal maturation, the density and viscosity of oil generally decrease, which encourages the flow and expulsion of oil (Wang et al, 2019b;Zhao W. Z. et al, 2021). The adsorptionswelling oil amount per unit of organic carbon is negatively correlated with increasing thermal maturity .…”

Section: Restriction Of Organic Matter Properties On Oil Retentionmentioning

confidence: 99%

“…Microfractures extending only in the interior of a shale increase the shale oil storage space and fluidity, which is more benefit to shale oil enrichment . Therefore, the shale thickness plays a positive role in the oil-bearing capacity (Fan and Shi, 2019;Zhao W. Z. et al, 2021).…”

Section: Influences Of Shale Thickness and Preservation Conditions On Oil Retentionmentioning

confidence: 99%

“…The shale organic matter abundance exerts two impacts on the shale oil mobility. Even considering shale hydrocarbon expulsion, a high TOC is still beneficial to an increase in the shale oil and movable oil contents (Lu et al, 2012;Hu et al, 2021;Zhao W. Z. et al, 2021). However, in shales with the same oil content, an increase in the TOC content suggests a decrease in the movable oil content (Wang et al, 2019b).…”

Section: Influencing Factors Of Movable Oilmentioning

confidence: 99%

“…It has been reported that the proportion of movable oil will increases with increasing burial depth. This phenomenon is related to the decrease in oil viscosity and density due to increasing temperature and light components (Wang et al, 2019b;Scheeder et al, 2020;Zhao W. Z. et al, 2021), which is conducive to a reduction in the oil film thickness and a relative increase in free oil in pores with the same pore size (Liu Y. S. et al, 2021). The increase in thermal maturity also leads to a decrease in the adsorption and swelling capacities of kerogen (Song et al, 2015;Wang et al, 2015b;Wang et al, 2019b reported that the decrease in adsorption capacity could be attributed to the reduction in TOC content with increasing maturity.…”

Section: Influencing Factors Of Movable Oilmentioning

confidence: 99%

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Oil Retention in Shales: A Review of the Mechanism, Controls and Assessment

et al. 2021

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Shale oil is a vital alternative energy source for oil and gas and has recently received an extensive attention. Characterization of the shale oil content provides an important guiding significance for resource potential evaluation, sweet spot prediction, and development of shale oil. In this paper, the mechanism, evaluation and influencing factors of oil retention in shales are reviewed. Oil is retained in shales through adsorption and swelling of kerogen, adsorption onto minerals and storage in shale pores. Quite a few methods are developed for oil content evaluation, such as three-dimensional fluorescence quantitation, two-dimensional nuclear magnetic resonance (2D NMR), solvent extraction, pyrolysis, multiple extraction-multiple pyrolysis-multiple chromatography, logging calculation, statistical regression, pyrolysis simulation experiment, and mass balance calculation. However, the limitations of these methods represent a challenge in practical applications. On this basis, the influencing factors of the oil retention are summarized from the microscale to the macroscale. The oil retention capacity is comprehensively controlled by organic matter abundance, type and maturity, mineral composition and diagenesis, oil storage space, shale thickness, and preservation conditions. Finally, oil mobility evaluation methods are introduced, mainly including the multitemperature pyrolysis, 2D NMR, and adsorption-swelling experiment, and the influencing factors of movable shale oil are briefly discussed. The aim of this paper is to deepen the understanding of shale oil evaluation and provide a basis for further research.

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Section: Restriction Of Organic Matter Properties On Oil Retentionmentioning

confidence: 99%

Section: Restriction Of Organic Matter Properties On Oil Retentionmentioning

confidence: 99%

Section: Influences Of Shale Thickness and Preservation Conditions On Oil Retentionmentioning

confidence: 99%