Oil content in argillaceous dolomite from the Jianghan Basin, China: Application of new grading evaluation criteria to study shale oil potential

Li, Wenhao; Lu, Shuangfang; Xue, Haitao; Zhang, Pengfei; Hu, Ying

doi:10.1016/j.fuel.2014.11.080

Cited by 49 publications

(27 citation statements)

References 10 publications

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“…Oil shale (OS), as an unconventional fossil fuel, attracts more and more attentions in recent years due to its huge reserve and the gradual depletion of petroleum resources [1][2][3]. It contains complex macromolecular organic matter called kerogen which is finely distributed in an inorganic matrix [4].…”

Section: Introductionmentioning

confidence: 99%

Identifying the reaction mechanism of oil-shale self-heating retorting by thermal analysis techniques

Guo

Pei

Wang

et al. 2015

Fuel

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Section: Introductionmentioning

confidence: 99%

Identifying the reaction mechanism of oil-shale self-heating retorting by thermal analysis techniques

Guo

Pei

Wang

et al. 2015

Fuel

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“…Oil-bearing capacity is one of the most fundamental factors considered in investigating shale oil potential (Hakimi et al, 2012;Jarvie, 2008Jarvie, , 2012Li, Lu, et al, 2015;Li, Wang, et al, 2015). Generally, the stronger the oil-bearing capacity of the shale, the higher the enrichment of the shale oil, leading to more favourable shale oil exploration (Lu et al, 2012;Wang, Sherwood, et al, 2015;Wang, Wilkins, et al, 2015).…”

Section: Oil-bearing Capacitymentioning

confidence: 99%

“…This method basically considers regions with great thickness, high TOC values, sapropelic kerogen types, and moderate thermal maturity as favourable shale oil exploration targets (Wang, Kuang, & Yang, 2014); however, considering only these characteristics is highly perilous. This is because aside from the geochemical characteristics, shale's mineralogical, petrophysical, and oil-bearing characteristics are essential for assessing fracability potential, oil storage capability, and shale oil content, all of which are extremely significant in evaluating shale oil potential (Hakimi, Shalaby, & Abdullah, 2012;Jarvie, 2008Jarvie, , 2012Li, Wang, et al, 2015;Li, Lu, Xue, Zhang, & Hu, 2015).…”

mentioning

confidence: 99%

Geochemical and geological characteristics of Permian Lucaogou Formation shale of the well Ji174, Jimusar Sag, Junggar Basin, China: Implications for shale oil exploration

Pang

Wang

et al. 2017

Geological Journal

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Abundant shale oil resources were recently found in the organic‐rich Permian Lucaogou (P2l) Formation shale, Jimusar Sag, Junggar Basin. Although some scholars have conducted some researches on the basic geochemical characteristics of the Lucaogou Formation shale, it is not enough to effectively guide the shale oil exploration in the area. This is because during the exploration process of shale oil, besides the basic geochemical characteristics of shale, its mineral composition, physical properties, and oil‐bearing characteristics are all very important evaluation parameters. To systematically evaluate the favourable shale oil exploration sections in the Lucaogou Formation, 265 pieces of shale cores were sampled from well Ji174 in this study. Besides the basic geochemical characteristics of the 265 pieces of cores, the mineralogical, petrophysical, and oil‐bearing characteristics were also analysed. Results show that the shale has abundant organic matter (average total organic carbon 3.51%, average petroleum generation potential 15.67 mg/g), dominated by Type II1 and Type II2 kerogen, and has entered the early‐mature to mature stage. The Upper Member of the Lucaogou Formation has relatively higher organic matter and organic matter type is relatively more oil prone compared to the Lower Member; however, organic matter thermal maturity is lower. The P2l Formation shale is characterized by high carbonate minerals and low clay minerals, and when considering mineralogical brittleness, both the Upper and Lower members are ideally fracturable in shale oil development. The P2l Formation shale has a wide porosity range (1.1–13.9%), and the Lower Member's porosity is slightly greater. The inversion of shale porosity in the P2l Formation is controlled by the differentiated mineral composition. The oil saturation index values of the Lower Member shale are significantly greater than the Upper Member shale. From the above, the Lower Member of the P2l Formation shale is ideally suited and has greater shale oil potential in the Jimusar Sag, Junggar Basin, especially in the depth intervals of 3,255–3,272, 3,282–3,298, and 3,317–3,334 m in the well Ji174.

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“…The high stratigraphic heterogeneity, high oil density, and low oil fluidity pose significant challenges in the exploration and production of such shale oil. Therefore, it is extremely important to obtain a comprehensive, in-depth understanding of the movability of the retained oil in shale (Liu et al, 2012;Tao et al, 2012;Li et al, 2015;Xie et al, 2015). In this study, core samples of different lithologies were collected from the different strata in well J174 in the Jimsar Sag, Junggar Basin, and then, the samples were subjected to different extraction treatments with n-hexane (nC 6 ) and chloroform (CHCl 3 ), followed by porosity measurements to explore how the extract composition of the component and the rock porosity vary with the extraction treatments and rock types.…”

Section: Introductionmentioning

confidence: 99%

Experimental Methods for the Quantitative Assessment of the Volume Fraction of Movable Shale Oil: A Case Study in the Jimsar Sag, Junggar Basin, China

Zhao

Hou

et al. 2021

Front. Earth Sci.

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Deep insights into the movability of the retained shale oil are of great significance to shale oil. Rock and crude oil samples were collected from well J174 in the Jimsar Sag, Junggar Basin. Rock samples were subjected to different extraction followed by analysis of the component in the extracts, and measurement of porosity in conjunction with nuclear magnetic resonance and high-pressure mercury injection analysis. The results of these analyses were used to establish an experimental method for quantitative assessment of movable shale oil. The extract content of the component varied among different extraction and between mud shale and non-mud shale samples. The saturated hydrocarbon in the extracts of the mud shale was similar to those of the non-mud shale after extraction with CHCl3 alone or after sequential extraction with nC6 + CHCl3. The aromatic hydrocarbon in the extract were significantly lower for the mud shale than for the non-mud shale after extraction with nC6, but the opposite was observed after sequential extraction with nC6 + CHCl3. The contents of the non-hydrocarbon in the extract were significantly lower for the mud shale than for the non-mud shale after extraction with nC6, but the opposite was observed after extraction with CHCl3 or nC6 + CHCl3. The contents of the asphaltene in the extract were not significantly different for the mud shale and non-mud shale after extraction with nC6, but the contents were higher for the mud shale than for the non-mud shale after extraction with nC6 + CHCl3 or CHCl3. The viscosity of the crude oil was negatively correlated with the saturated hydrocarbon, was positively correlated with the aromatic hydrocarbon and non-hydrocarbon, and was not correlated with the asphaltene. For the mud shale and non-mud shale, their porosity after extraction with nC6 or CHCl3 was higher than their original porosity. Moreover, their porosity after extraction with CHCl3 was higher than after extraction with nC6. The movable oil was significantly correlated with the lithology, with sandstone allowing for a higher fluid movability than mud shale and dolomite allowing for a higher fluid movability than siliceous rocks.

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Oil content in argillaceous dolomite from the Jianghan Basin, China: Application of new grading evaluation criteria to study shale oil potential

Cited by 49 publications

References 10 publications

Identifying the reaction mechanism of oil-shale self-heating retorting by thermal analysis techniques

Identifying the reaction mechanism of oil-shale self-heating retorting by thermal analysis techniques

Geochemical and geological characteristics of Permian Lucaogou Formation shale of the well Ji174, Jimusar Sag, Junggar Basin, China: Implications for shale oil exploration

Experimental Methods for the Quantitative Assessment of the Volume Fraction of Movable Shale Oil: A Case Study in the Jimsar Sag, Junggar Basin, China

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