Organic geochemistry of marine source rocks and pyrobitumen-containing reservoir rocks of the Sichuan Basin and neighbouring areas, SW China

Jiang, Xiaodong; Pan, Changchun; Yu, Shuang; Li, Ertin; Wang, Jun; Fu, Xiaodong; Qin, Jianzhong; Xie, Zengye; Zheng, Ping; Wang, Lansheng; Chen, Jianping; Tan, Yuming

doi:10.1016/j.marpetgeo.2014.04.010

Cited by 41 publications

(32 citation statements)

References 50 publications

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“…In summary, the non-TSR altered solid bitumen may have been derived from the P 3 l/P 3 w oil-prone kerogen or sapropelic-dominated source rocks in the Bazhong-Dazhou depression based on 13 C values and biomarkers, supporting the conclusions made by Borjigen et al [4] and Jin et al [3]. 34 S kero values.…”

Section: Correlation Of Solid Bitumen With Kerogen Based Onsupporting

confidence: 82%

“…The geological setting has been published in Cai et al [5], Cai et al (2014), Ma et al [23], and Jin et al [3]. It is a late Mesozoic-Cenozoic foreland basin overlying an Ediacaran-Middle Mesozoic passive margin.…”

Section: Geological Settingmentioning

confidence: 99%

“…Organic matter in these source rocks is primarily type I sapropelic and II 1 humic-sapropelic kerogens and exhibits similar biomarker composition but different 13 C values [1][2][3]. Upper Permian Dalong Fm or Changxing Fm source rocks are dark gray, gray black carbonaceous shale, calcareous mudstone, siliceous mudstone, and silicates with a thickness up to 30 m and TOC up to 13.5% [17].…”

Section: Geological Settingmentioning

confidence: 99%

“…The solid bitumen and associated gases may have mainly derived from Upper Permian Longtan Formation based on correlation of biomarkers and 13 C values of the source rocks and solid bitumen (pyrobitumen) in reservoirs [1][2][3][4]. However, the conclusion may not be effective, based on the consideration of the following two aspects.…”

Section: Introductionmentioning

confidence: 99%

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Biomarkers and C and S Isotopes of the Permian to Triassic Solid Bitumen and Its Potential Source Rocks in NE Sichuan Basin

Cai

et al. 2017

Geofluids

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The potential parent source rocks except from Upper Permian Dalong Formation (P 3 d) for Upper Permian and Lower Triassic solid bitumen show high maturity to overmaturity with equivalent vitrinite reflectance (ER ) from 1.7% to 3.1% but have extractable organic matter likely not contaminated by younger source rocks. P 3 d source rocks were deposited under euxinic environments as indicated by the pyrite 34 S values as light as −34.5‰ and distribution of aryl isoprenoids, which were also detected from the Lower Silurian (S 1 l) source rock and the solid bitumen in the gas fields in the west not in the east. All the solid bitumen not altered by thermochemical sulfate reduction (TSR) has 13 C and 34 S values similar to part of the P 3 l kerogens and within the S 1 l kerogens. Thus, the eastern solid bitumen may have been derived from the P 3 l kerogens, and the western solid bitumen was likely to have precracking oils from P 3 l kerogens mixed with the S 1 l or P 3 d kerogens. This case-study tentatively shows that 13 C and 34 S values along with biomarkers have the potential to be used for the purpose of solid bitumen and source rock correlation in a rapidly buried basin, although further work should be done to confirm it.

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Section: Correlation Of Solid Bitumen With Kerogen Based Onsupporting

confidence: 82%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biomarkers and C and S Isotopes of the Permian to Triassic Solid Bitumen and Its Potential Source Rocks in NE Sichuan Basin

Cai

et al. 2017

Geofluids

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“…Tricyclic terpanes (TT) and tetracyclic terpanes (TeT) from sedimentary organic matter can provide valuable information to assess organic input, maturity, correlation of crude oils (Didyk et al, 1978;Azevedo et al, 1992;Farrimond et al, 1999;Tuo et al, 1999;Nady, 2008;Samuel et al, 2010;Wang et al, 2012;Zhang and Philp, 2012;Jin et al, 2014). The tricyclic terpane series are commonly observed in petroleum samples up to C 29 , but the higher members of the series are often masked by hopanes in the m/z 191 mass chromatogram.…”

Section: Introductionmentioning

confidence: 99%

Geochemical application of tricyclic and tetracyclic terpanes biomarkers in crude oils of NW China

Tao

Wang

et al. 2015

Marine and Petroleum Geology

136

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a b s t r a c tComposition and distribution of tricyclic terpanes, tetracyclic terpanes and hopane in crude oils from Tarim, Turpan, Ordos and Qaidam basins, NW China, were investigated, and some new source dependent parameters were developed and evaluated. C 19 and C 20 tricyclic terpanes are more abundant in terrigenous oils, with C 24 tetracyclic terpane dominant. Relatively higher carbon number tricyclic terpanes, especially C 23 tricyclic terpane, are often the dominant homologues in crude oils from saline lacustrine and marine sources. On the whole, the relative content of C 23 tricyclic terpane of crude oils follow the order of saline lacustrine oils > marine oils > freshwater lacustrine oils > terrigenous oils for C 19e23 tricyclic terpane. Some new parameters based on the tricyclic/hopane and tetracyclic/tricyclic terpane as well as tetracyclic/hopane ratios, could be used to distinguish the oils and source rocks with similar maturity deposited in different sedimentary environments.

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Rare earth elements (REEs) geochemistry of Sinian–Cambrian reservoir solid bitumens in Sichuan Basin, SW China: potential application to petroleum exploration

et al. 2015

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In order to evaluate rare earth elements (REEs) as a potential proxy for solid bitumen classification, we employed traditional correlation approaches, such as carbon isotopes and V/(V + Ni) ratios, to infer the source rocks of Sinian-Cambrian reservoir solid bitumens in the Sichuan Basin and analyse solid bitumens for their REE compositions by inductively coupled plasma-mass spectrometry. Our data suggested that Sinian-Cambrian reservoir solid bitumens were primarily sourced from the lower Cambrian shales deposited under anoxic-euxinic conditions. REE and their associated parameters seemed to be more sensitive to classify solid bitumens than traditional correlation approaches. REE concentrations played a dominant role and fractionation degree between light and heavy REE and played a secondary role in solid bitumen classification. REE concentration and pattern in solid bitumens might be controlled by two processes, including inheritance from source rocks and water-rock interaction. The major factor controlling REE concentrations in solid bitumens was the type of organic matter of source rocks. Authigenic minerals in solid bitumens formed by water-rock interaction appeared to have little influence on REE compositions of solid bitumens because of their trace contents. Overall, REE could be used as a novel complementary approach to solid bitumen classification in complicated petroleum systems.

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Organic geochemistry of marine source rocks and pyrobitumen-containing reservoir rocks of the Sichuan Basin and neighbouring areas, SW China

Cited by 41 publications

References 50 publications

Biomarkers and C and S Isotopes of the Permian to Triassic Solid Bitumen and Its Potential Source Rocks in NE Sichuan Basin

Biomarkers and C and S Isotopes of the Permian to Triassic Solid Bitumen and Its Potential Source Rocks in NE Sichuan Basin

Geochemical application of tricyclic and tetracyclic terpanes biomarkers in crude oils of NW China

Rare earth elements (REEs) geochemistry of Sinian–Cambrian reservoir solid bitumens in Sichuan Basin, SW China: potential application to petroleum exploration

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