Pennsylvanian coal and associated bitumen at Johnson Mills, Shepody Bay, New Brunswick, Canada

Guckert, Kristal D.; Mossman, David J.

doi:10.1016/s0166-5162(02)00181-7

Cited by 8 publications

(2 citation statements)

References 10 publications

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“…The sealed part has an obvious phase boundary with the main mineral. Fluid inclusions represent the geologic fluids retained during the formation of oil and gas in geologic time; filling and evolution history, the accumulation period, and time have important research significance. , Hydrocarbon inclusions in the Permian Wutonggou Formation of well DN8 are mainly distributed in groups, with quartz particles as the primary host . The homogenization temperature of inclusions is between 90 and 120 °C, mainly between 110 and 120 °C.…”

Section: Discussionmentioning

confidence: 99%

Origin and Genesis of the Permain Hydrocarbon in the Northeast of the Dongdaohaizi Depression, Junggar Basin, China

Zhou

et al. 2022

ACS Omega

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Dongdaohaizi area is an important hydrocarbon-rich depression in the Junggar Basin. Early resource evaluation has revealed that it has superior hydrocarbon generation conditions. No major exploration breakthrough has been observed in the hydrocarbon from the Permian Pingdiquan Formation source rocks, which are widely distributed and have a large sedimentary thickness. The unclear recognition of the genesis, the sources, and the hydrocarbon evolution history of the formation seriously restricted further exploration and development. Sixty-four samples were acquired during the study, consisting of 30 source rocks, 13 crude oil samples, and 21 natural gas samples. Studying the geochemical characteristics of the source rock extract and the surrounding structural crude oil in the Dongdaohaizi Depression, the differences in the stable carbon isotope, the biomarker compound, and the molecular relative composition of the three sets of main source rock products in the research fields are summarized. The results reflect that the drying coefficient of natural gas in the study area is generally low, and the fractional distillation value of methane and ethane is 0.32, which is most likely due to the loss of oil and gas migration and the mixing of different types of natural gases. The carbon isotope value is relatively low, with the Pr/Ph being generally less than 3.0. The content of sterane C 29 is the highest in the relative composition of steranes, followed by the content of sterane C 28 , which together account for more than 80% of the total sterane content, and then followed by a lower content of C 27 sterane, accounting for only 5–20% of the total content, which generally conforms to the characteristics of Permian Pingdiquan Formation source rock products. The carbon isotope value of crude oil ranges from −30.94 to −28.31‰, which is different from the characteristics of typical Permian source rocks (values range from −34.49 to −28.21‰), while it is related to typical Carboniferous products (values range from −29.98 to −24.1‰), indicating that small amounts of Carboniferous source rock products were mixed in different degrees in the Dinan fault area. According to the distribution law of oil and gas, the geochemical characteristics and hydrocarbon sources were considered the oil source in the east of the Dongdaohaizi Depression, mainly from the source rocks of the Permian Pingdiquan Formation. The products of the peak period of hydrocarbon generation in the source rocks of the Pingdiquan Formation have not been transported to the high structural positions on a large scale to form reservoirs. They may still exist in the deep part of the Depression and the slope area. The low-amplitude structural and lithologic traps in the slope area of the Dongdahaizi Depression are promising targets for finding the products of the peak period of hydrocarbon generation. This is of great significance to reveal the Permain hydrocarbon evolution in the Junggar Basin ...

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Section: Discussionmentioning

confidence: 99%

Origin and Genesis of the Permain Hydrocarbon in the Northeast of the Dongdaohaizi Depression, Junggar Basin, China

Zhou

et al. 2022

ACS Omega

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“…The asphalt contains a large amount of heavy organic matter that can be analyzed for oil and source comparison and hydrocarbon accumulation by organic and inorganic geochemical methods, such as carbon isotopes, biomarkers, and main and trace elements (Moldowan et al, 1985;Curiale, 1986;Jacob, 1989;Hwang et al, 1998;Guckert and Mossman, 2003;Liao et al, 2015). The asphaltene of crude oils has over 90% of Re and Os elements due to their organophilic characteristics (Mahdaoui et al, 2013) and almost represents the entire crude oil isotopic composition of Re and Os (Selby et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Source and geological significance of Jurassic asphalt in the Ruoqiang Sag of Southeast Depression, Tarim Basin, Northwestern China

Lan,

Bai,

Yang

et al. 2024

Front. Earth Sci.

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The Southeast Depression of the Tarim Basin has a very low petroleum exploration degree, and currently, no industrial oil and gas have been discovered. Many hydrocarbon shows exist in the Ruoqiang Sag, where hydrocarbon sources and accumulation processes are unclear. Only two potential Jurassic hydrocarbon source rocks developed in the Ruoqiang Sag, the Yangye (J2y) lacustrine mudstone of the Middle Jurassic and the Kangsu (J1k) coal-bearing mudstone of the Lower Jurassic. In this study, the Jurassic asphalt found in the QD1 well, combined with the source rocks of drilling cores and outcrops, was used to explore the possible hydrocarbon source and forming process in the Ruoqiang Sag using oil-source correlation and hydrocarbon accumulation geochronology methods. The asphalts have lower light and heavy rare earth fractionation than the J2y mudstone, and the total rare earth element (ΣREE) content, chondrite-normalized curves, and δEu and Y/Ho values are similar to those of the J1k mudstone, especially for the J1k coal. The n-alkane ratios of the carbon preference index and the odd-to-even preference (OEP) of Jurassic asphalts are greater than 1.0, indicating that its source rock has experienced low thermal evolution. All Jurassic samples have similar source-related biomarkers but different maturity-related parameters, and the thermal evolution degree of asphalt is close to the J1k mudstone and coal but slightly higher than the J2y mudstone. Meanwhile, rhenium–osmium isotopes show the asphalts are formed in 192+30/−45 Ma, which is similar to the J1k sedimentation time. The asphalts contain coal macerals and probably derived from the asphaltene precipitated by the J1k coal during the early coalification. The low abundance of 25-norbornanes with a non- or slight petroleum biodegradation degree indicates the asphalt was generated relatively late and migrated into the J2y formation along the faults, possibly accompanied by the striking activities of the Altyn Tagh Fault during the Neotectonics movement. This study provides evidence for the J1k coal-bearing strata serving as the effective source rock in the Ruoqiang Sag and increases confidence for Jurassic petroleum exploration in the Southeast Depression of the Tarim Basin. The structural and lithological traps near hydrocarbon source stoves, where Jurassic strata were deeply buried and far from the Altyn Tagh Range, are favorable oil and gas exploration targets.

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Review and update of the applications of organic petrology: Part 1, geological applications

Suárez‐Ruíz

Flores

Filho

et al. 2012

International Journal of Coal Geology

253

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Pennsylvanian coal and associated bitumen at Johnson Mills, Shepody Bay, New Brunswick, Canada

Cited by 8 publications

References 10 publications

Origin and Genesis of the Permain Hydrocarbon in the Northeast of the Dongdaohaizi Depression, Junggar Basin, China

Origin and Genesis of the Permain Hydrocarbon in the Northeast of the Dongdaohaizi Depression, Junggar Basin, China

Source and geological significance of Jurassic asphalt in the Ruoqiang Sag of Southeast Depression, Tarim Basin, Northwestern China

Review and update of the applications of organic petrology: Part 1, geological applications

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