Source rock evaluation and prediction of effective hydrocarbon kitchen distribution of Upper Triassic in Junggar Basin
The Junggar Basin is known for its high potential of petroleum resources, showcasing significant oil and gas discoveries across various layers. However, the potential of utilizing the thick mudstone of the Upper Triassic as a viable source rock in the basin remains uncertain. Therefore, an urgent ne...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Petroleum Geology and Experiment
2024-03-01
|
| Series: | Shiyou shiyan dizhi |
| Subjects: | |
| Online Access: | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202402380 |
| _version_ | 1797234306896101376 |
|---|---|
| author | Fan YANG Zhenglin CAO Hailei LIU Shu TAO Shan LU Deyu GONG Gang CHEN Meng XIAO |
| author_facet | Fan YANG Zhenglin CAO Hailei LIU Shu TAO Shan LU Deyu GONG Gang CHEN Meng XIAO |
| author_sort | Fan YANG |
| collection | DOAJ |
| description | The Junggar Basin is known for its high potential of petroleum resources, showcasing significant oil and gas discoveries across various layers. However, the potential of utilizing the thick mudstone of the Upper Triassic as a viable source rock in the basin remains uncertain. Therefore, an urgent need exists to assess the Upper Triassic source rock across the basin and predict the distribution of effective source rocks. This evaluation is crucial for informing future exploration strategies in this layer. To shed light on the spatiotemporal distribution characteristics and hydrocarbon generation potential of the Upper Triassic source rocks in the Junggar Basin, as well as to determine the hydrocarbon generation intensity within the effective hydrocarbon kitchen's distribution range, a comprehensive evaluation was conducted. This evaluation involved assessing organic matter abundance, type, and maturity of the Upper Triassic source rock across the basin using various geochemical parameters derived from data collection, profile measurement, drill cuttings observation and sampling, and organic geochemistry testing. Key parameters were then selected, and a multi-level fuzzy mathematical evaluation method was employed to map out the development range of the effective hydrocarbon kitchen. The findings indicate that the Upper Triassic source rock exhibits a broad distribution range spanning the entire basin, with considerable thickness (reaching up to 350 m) and significant burial depth in the central region (up to 11 000 m). The total organic carbon (TOC) content of source rocks varies from 0.75% to 8.30%, with an average value of 1.74%. Additionally, the average values of S1+S2 and chloroform asphalt "A" are 2.78 mg/g and 0.354%, respectively. The predominant organic matter types in the area are type Ⅲ and type Ⅱ2, indicating a dominance of terrestrial higher plant inputs. The favorable kerogen types are primarily located from the western sag to the Fukang Sag. The thermal evolution of the organic matter ranges from low-maturity to mature stages, with some areas reaching high to over-maturity levels. As per the evaluation criteria for hydrocarbon generation potential of coal-bearing mudstone in China, the Upper Triassic mudstone generally represents poor to medium-quality source rocks with significant hydrocarbon generation potential, particularly for gas. The key hydrocarbon source kitchens are situated from the western part of the Fukang Sag to the eastern part of the Shawan Sag in the central depression, and in the Huomatu Anticline of the southern margin thrust belt. Within these areas, the Ro value of the source rock exceeds 1.3%, with oil and gas generation intensities reaching 50×104 t/km2 and 3×108 m3/km2, respectively. |
| first_indexed | 2024-04-24T16:29:59Z |
| format | Article |
| id | doaj.art-fd47b060cca34df190e66d7d42329fda |
| institution | Directory Open Access Journal |
| issn | 1001-6112 |
| language | zho |
| last_indexed | 2024-04-24T16:29:59Z |
| publishDate | 2024-03-01 |
| publisher | Editorial Office of Petroleum Geology and Experiment |
| record_format | Article |
| series | Shiyou shiyan dizhi |
| spelling | doaj.art-fd47b060cca34df190e66d7d42329fda2024-03-30T07:53:00ZzhoEditorial Office of Petroleum Geology and ExperimentShiyou shiyan dizhi1001-61122024-03-0146238039210.11781/sysydz202402380sysydz-46-2-380Source rock evaluation and prediction of effective hydrocarbon kitchen distribution of Upper Triassic in Junggar BasinFan YANG0Zhenglin CAO1Hailei LIU2Shu TAO3Shan LU4Deyu GONG5Gang CHEN6Meng XIAO7Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, ChinaResearch Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, ChinaSchool of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, ChinaBeijing Petroleum Machinery Co., Ltd., CNPC Engineering Technology R & D Co., Ltd., Beijing 102206, ChinaThe Junggar Basin is known for its high potential of petroleum resources, showcasing significant oil and gas discoveries across various layers. However, the potential of utilizing the thick mudstone of the Upper Triassic as a viable source rock in the basin remains uncertain. Therefore, an urgent need exists to assess the Upper Triassic source rock across the basin and predict the distribution of effective source rocks. This evaluation is crucial for informing future exploration strategies in this layer. To shed light on the spatiotemporal distribution characteristics and hydrocarbon generation potential of the Upper Triassic source rocks in the Junggar Basin, as well as to determine the hydrocarbon generation intensity within the effective hydrocarbon kitchen's distribution range, a comprehensive evaluation was conducted. This evaluation involved assessing organic matter abundance, type, and maturity of the Upper Triassic source rock across the basin using various geochemical parameters derived from data collection, profile measurement, drill cuttings observation and sampling, and organic geochemistry testing. Key parameters were then selected, and a multi-level fuzzy mathematical evaluation method was employed to map out the development range of the effective hydrocarbon kitchen. The findings indicate that the Upper Triassic source rock exhibits a broad distribution range spanning the entire basin, with considerable thickness (reaching up to 350 m) and significant burial depth in the central region (up to 11 000 m). The total organic carbon (TOC) content of source rocks varies from 0.75% to 8.30%, with an average value of 1.74%. Additionally, the average values of S1+S2 and chloroform asphalt "A" are 2.78 mg/g and 0.354%, respectively. The predominant organic matter types in the area are type Ⅲ and type Ⅱ2, indicating a dominance of terrestrial higher plant inputs. The favorable kerogen types are primarily located from the western sag to the Fukang Sag. The thermal evolution of the organic matter ranges from low-maturity to mature stages, with some areas reaching high to over-maturity levels. As per the evaluation criteria for hydrocarbon generation potential of coal-bearing mudstone in China, the Upper Triassic mudstone generally represents poor to medium-quality source rocks with significant hydrocarbon generation potential, particularly for gas. The key hydrocarbon source kitchens are situated from the western part of the Fukang Sag to the eastern part of the Shawan Sag in the central depression, and in the Huomatu Anticline of the southern margin thrust belt. Within these areas, the Ro value of the source rock exceeds 1.3%, with oil and gas generation intensities reaching 50×104 t/km2 and 3×108 m3/km2, respectively.https://www.sysydz.net/cn/article/doi/10.11781/sysydz202402380source rock evaluationeffective hydrocarbon kitchenupper triassicjunggar basin |
| spellingShingle | Fan YANG Zhenglin CAO Hailei LIU Shu TAO Shan LU Deyu GONG Gang CHEN Meng XIAO Source rock evaluation and prediction of effective hydrocarbon kitchen distribution of Upper Triassic in Junggar Basin Shiyou shiyan dizhi source rock evaluation effective hydrocarbon kitchen upper triassic junggar basin |
| title | Source rock evaluation and prediction of effective hydrocarbon kitchen distribution of Upper Triassic in Junggar Basin |
| title_full | Source rock evaluation and prediction of effective hydrocarbon kitchen distribution of Upper Triassic in Junggar Basin |
| title_fullStr | Source rock evaluation and prediction of effective hydrocarbon kitchen distribution of Upper Triassic in Junggar Basin |
| title_full_unstemmed | Source rock evaluation and prediction of effective hydrocarbon kitchen distribution of Upper Triassic in Junggar Basin |
| title_short | Source rock evaluation and prediction of effective hydrocarbon kitchen distribution of Upper Triassic in Junggar Basin |
| title_sort | source rock evaluation and prediction of effective hydrocarbon kitchen distribution of upper triassic in junggar basin |
| topic | source rock evaluation effective hydrocarbon kitchen upper triassic junggar basin |
| url | https://www.sysydz.net/cn/article/doi/10.11781/sysydz202402380 |
| work_keys_str_mv | AT fanyang sourcerockevaluationandpredictionofeffectivehydrocarbonkitchendistributionofuppertriassicinjunggarbasin AT zhenglincao sourcerockevaluationandpredictionofeffectivehydrocarbonkitchendistributionofuppertriassicinjunggarbasin AT haileiliu sourcerockevaluationandpredictionofeffectivehydrocarbonkitchendistributionofuppertriassicinjunggarbasin AT shutao sourcerockevaluationandpredictionofeffectivehydrocarbonkitchendistributionofuppertriassicinjunggarbasin AT shanlu sourcerockevaluationandpredictionofeffectivehydrocarbonkitchendistributionofuppertriassicinjunggarbasin AT deyugong sourcerockevaluationandpredictionofeffectivehydrocarbonkitchendistributionofuppertriassicinjunggarbasin AT gangchen sourcerockevaluationandpredictionofeffectivehydrocarbonkitchendistributionofuppertriassicinjunggarbasin AT mengxiao sourcerockevaluationandpredictionofeffectivehydrocarbonkitchendistributionofuppertriassicinjunggarbasin |