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Unconventional Oil and Gas: Reservoir Evaluation and Accumulation Mechanism Research—2nd Edition

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "H: Geo-Energy".

Deadline for manuscript submissions: 15 January 2025 | Viewed by 745

Special Issue Editors

State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
Interests: characterization and evaluation of tight oil and gas reservoirs (including shale oil and gas reservoirs); sedimentation and diagenesis of fine-grained sedimentary rocks; genetic mechanism and dolomitization of dolomite reservoirs
Special Issues, Collections and Topics in MDPI journals
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
Interests: sedimentary petrology; reservoir geology; applied sedimentology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to share the success of our Special Issue "Unconventional Oil and Gas: Reservoir Evaluation and Accumulation Mechanism Research" https://www.mdpi.com/journal/energies/special_issues/4D2808X272.

We are now preparing to launch the second volume of this Special Issue, and are pleased to invite you to submit papers to Energies for a Special Issue that will be entirely devoted to “Unconventional Oil and Gas: Reservoir Evaluation and Accumulation Mechanism Research—2nd Edition”.

The Special Issue will expand on reservoir characterization technology, the formation mechanism of high-quality reservoirs, and the accumulation mechanism of unconventional oil and gas reservoirs for improving understandings of unconventional oil and gas reservoirs. This collection of works will serve as an excellent platform for sharing information and findings collected from different studies.

In the last few decades, unconventional resources have attracted significant attention from the petroleum industry, and unconventional oil and gas resources have evolved into an important resource worldwide. The potential for unconventional oil and gas exploration is huge and has broad implications. Although extensive studies have been conducted on unconventional oil and gas reservoirs in recent years, the formation mechanism of high-quality reservoirs and the accumulation mechanism of unconventional oil and gas are still unclear.

Potential topics of interest include, but are not limited to, the following:

  • Novel technologies to characterize shale/tight reservoir pore structure;
  • Organic–inorganic interaction in shale diagenesis;
  • The formation mechanism of high-quality reservoirs;
  • Advanced methods for shale oil mobility evaluation;
  • Mechanisms of accumulation of shale/tight oil.

Dr. Qing Li
Dr. Haitao Sun
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • unconventional resources
  • shale oil and gas
  • tight oil
  • reservoir evaluation
  • accumulation mechanism

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Published Papers (1 paper)

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Research

21 pages, 17427 KiB  
Article
Thermal History and Hydrocarbon Accumulation Stages in Majiagou Formation of Ordovician in the East-Central Ordos Basin
by Hua Tao, Junping Cui, Fanfan Zhao, Zhanli Ren, Kai Qi, Hao Liu and Shihao Su
Energies 2024, 17(17), 4435; https://doi.org/10.3390/en17174435 - 4 Sep 2024
Viewed by 502
Abstract
The marine carbonates in the Ordovician Majiagou Formation in the Ordos Basin have significant exploration potential. Research has focused on their thermal history and hydrocarbon accumulation stages, as these are essential for guiding the exploration and development of hydrocarbons. In this paper, we [...] Read more.
The marine carbonates in the Ordovician Majiagou Formation in the Ordos Basin have significant exploration potential. Research has focused on their thermal history and hydrocarbon accumulation stages, as these are essential for guiding the exploration and development of hydrocarbons. In this paper, we study the thermal evolution history of the carbonate reservoirs of the Ordovician Majiagou Formation in the east-central Ordos Basin. Furthermore, petrographic and homogenization temperature studies of fluid inclusions were carried out to further reveal the hydrocarbon accumulation stages. The results demonstrate that the degree of thermal evolution of the Ordovician carbonate reservoirs is predominantly influenced by the deep thermal structure, exhibiting a trend of high to low values from south to north in the central region of the basin. The Fuxian area is located in the center of the Early Cretaceous thermal anomalies, with the maturity degree of the organic matter ranging from 1 to 3.2%, with a maximum value of 3.2%. The present geothermal gradient of the Ordovician Formation exhibits the characteristics of east–high and west–low, with an average of 28.6 °C/km. The average paleo-geotemperature gradient is 54.2 °C/km, the paleoheat flux is 55 mW/m2, and the maximum paleo-geotemperature reaches up to 270 °C. The thermal history recovery indicates that the Ordovician in the central part of the basin underwent three thermal evolution stages: (i) a slow warming stage before the Late Permian; (ii) a rapid warming stage from the end of the Late Permian to the end of the Early Cretaceous; (iii) a cooling stage after the Early Cretaceous, with the hydrocarbon production of hydrocarbon source rocks weakening. In the central part of the basin, the carbonate rock strata of the Majiagou Formation mainly developed asphalt inclusions, natural gas inclusions, and aqueous inclusions. The fluid inclusions can be classified into two stages. The early-stage fluid inclusions are mainly present in dissolution holes. The homogenization temperature is 110–130 °C; this coincides with the hydrocarbon charging period of 210–165 Ma, which corresponds to the end of the Triassic to the end of the Middle Jurassic. The late-stage fluid inclusions are in the dolomite vein or late calcite that filled the gypsum-model pores. The homogenization temperature is 160–170 °C; this coincides with the hydrocarbon charging period of 123–97 Ma, which corresponds to the late Early Cretaceous. Both hydrocarbon charging periods are in the rapid stratigraphic warming stage. Full article
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