Geological conditions of natural gas accumulation and new exploration areas in the Mesoproterozoic to Lower Paleozoic of Ordos Basin, NW China
Based on field outcrop investigation, interpretation and analysis of drilling and seismic data, and consulting on a large number of previous research results, the characteristics of ancient marine hydrocarbon source rocks, favorable reservoir facies belts, hydrocarbon migration direction and reservo...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2019-10-01
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| Series: | Petroleum Exploration and Development |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1876380419602466 |
| _version_ | 1818915544608276480 |
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| author | Jinhu DU Xiangbo LI Hongping BAO Wanglin XU Yating WANG Junping HUANG Hongbo WANG Rong WANYAN Jing WANG |
| author_facet | Jinhu DU Xiangbo LI Hongping BAO Wanglin XU Yating WANG Junping HUANG Hongbo WANG Rong WANYAN Jing WANG |
| author_sort | Jinhu DU |
| collection | DOAJ |
| description | Based on field outcrop investigation, interpretation and analysis of drilling and seismic data, and consulting on a large number of previous research results, the characteristics of ancient marine hydrocarbon source rocks, favorable reservoir facies belts, hydrocarbon migration direction and reservoir-forming law in the Ordos Basin have been studied from the viewpoints of North China Craton breakup and Qilian-Qinling oceanic basin opening and closing. Four main results are obtained: (1) Controlled by deep-water shelf-rift, there are three suites of source rocks in the Ordos Basin and its periphery: Mesoproterozoic, Lower Cambrian and Middle-Upper Ordovician. (2) Controlled by littoral environment, paleo-uplift and platform margin, four types of reservoirs are developed in the area: Mesoproterozoic– Lower Cambrian littoral shallow sea quartz sandstone, Middle-Upper Cambrian–Ordovician weathering crust and dolomitized reservoir, and Ordovician L-shape platform margin reef and beach bodies. (3) Reservoir-forming assemblages vary greatly in the study area, with “upper generation and lower storage” as the main pattern in the platform, followed by “self-generation and self-storage”. There are both “upper generation and lower storage” and “self-generation and self-storage” in the platform margin zone. In addition, in the case of communication between deep-large faults and the Changchengian system paleo-rift trough, there may also exist a “lower generation and upper reservoir” combination between the platform and the margin. (4) There are four new exploration fields including Qingyang paleo-uplift pre-Carboniferous weathering crust, L-shape platform margin zone in southwestern margin of the basin, Ordovician subsalt assemblage in central and eastern parts of the basin, and Mesoproterozoic–Cambrian. Among them, pre-Carboniferous weathering crust and L-shape platform margin facies zone are more realistic replacement areas, and Ordovician subsalt assemblage and the Proterozoic-Cambrian have certain potential and are worth exploring. Key words: natural gas exploration area, hydrocarbon accumulation geological conditions, Mesoproterozoic, Neoproterozoic, Lower Paleozoic, Ordos Basin |
| first_indexed | 2024-12-20T00:03:58Z |
| format | Article |
| id | doaj.art-aa6dbd946320472cbaee607f91917065 |
| institution | Directory Open Access Journal |
| issn | 1876-3804 |
| language | English |
| last_indexed | 2024-12-20T00:03:58Z |
| publishDate | 2019-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum Exploration and Development |
| spelling | doaj.art-aa6dbd946320472cbaee607f919170652022-12-21T20:00:43ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042019-10-01465866882Geological conditions of natural gas accumulation and new exploration areas in the Mesoproterozoic to Lower Paleozoic of Ordos Basin, NW ChinaJinhu DU0Xiangbo LI1Hongping BAO2Wanglin XU3Yating WANG4Junping HUANG5Hongbo WANG6Rong WANYAN7Jing WANG8PetroChina Exploration & Production Company, Beijing 100007, ChinaNorthwest Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Lanzhou 730020, China; Corresponding authorResearch Institute of Petroleum Exploration & Development, PetroChina Changqing Oilfield Company, Xi'an 710018, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, ChinaNorthwest Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Lanzhou 730020, ChinaNorthwest Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Lanzhou 730020, ChinaNorthwest Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Lanzhou 730020, ChinaNorthwest Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Lanzhou 730020, ChinaNorthwest Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Lanzhou 730020, ChinaBased on field outcrop investigation, interpretation and analysis of drilling and seismic data, and consulting on a large number of previous research results, the characteristics of ancient marine hydrocarbon source rocks, favorable reservoir facies belts, hydrocarbon migration direction and reservoir-forming law in the Ordos Basin have been studied from the viewpoints of North China Craton breakup and Qilian-Qinling oceanic basin opening and closing. Four main results are obtained: (1) Controlled by deep-water shelf-rift, there are three suites of source rocks in the Ordos Basin and its periphery: Mesoproterozoic, Lower Cambrian and Middle-Upper Ordovician. (2) Controlled by littoral environment, paleo-uplift and platform margin, four types of reservoirs are developed in the area: Mesoproterozoic– Lower Cambrian littoral shallow sea quartz sandstone, Middle-Upper Cambrian–Ordovician weathering crust and dolomitized reservoir, and Ordovician L-shape platform margin reef and beach bodies. (3) Reservoir-forming assemblages vary greatly in the study area, with “upper generation and lower storage” as the main pattern in the platform, followed by “self-generation and self-storage”. There are both “upper generation and lower storage” and “self-generation and self-storage” in the platform margin zone. In addition, in the case of communication between deep-large faults and the Changchengian system paleo-rift trough, there may also exist a “lower generation and upper reservoir” combination between the platform and the margin. (4) There are four new exploration fields including Qingyang paleo-uplift pre-Carboniferous weathering crust, L-shape platform margin zone in southwestern margin of the basin, Ordovician subsalt assemblage in central and eastern parts of the basin, and Mesoproterozoic–Cambrian. Among them, pre-Carboniferous weathering crust and L-shape platform margin facies zone are more realistic replacement areas, and Ordovician subsalt assemblage and the Proterozoic-Cambrian have certain potential and are worth exploring. Key words: natural gas exploration area, hydrocarbon accumulation geological conditions, Mesoproterozoic, Neoproterozoic, Lower Paleozoic, Ordos Basinhttp://www.sciencedirect.com/science/article/pii/S1876380419602466 |
| spellingShingle | Jinhu DU Xiangbo LI Hongping BAO Wanglin XU Yating WANG Junping HUANG Hongbo WANG Rong WANYAN Jing WANG Geological conditions of natural gas accumulation and new exploration areas in the Mesoproterozoic to Lower Paleozoic of Ordos Basin, NW China Petroleum Exploration and Development |
| title | Geological conditions of natural gas accumulation and new exploration areas in the Mesoproterozoic to Lower Paleozoic of Ordos Basin, NW China |
| title_full | Geological conditions of natural gas accumulation and new exploration areas in the Mesoproterozoic to Lower Paleozoic of Ordos Basin, NW China |
| title_fullStr | Geological conditions of natural gas accumulation and new exploration areas in the Mesoproterozoic to Lower Paleozoic of Ordos Basin, NW China |
| title_full_unstemmed | Geological conditions of natural gas accumulation and new exploration areas in the Mesoproterozoic to Lower Paleozoic of Ordos Basin, NW China |
| title_short | Geological conditions of natural gas accumulation and new exploration areas in the Mesoproterozoic to Lower Paleozoic of Ordos Basin, NW China |
| title_sort | geological conditions of natural gas accumulation and new exploration areas in the mesoproterozoic to lower paleozoic of ordos basin nw china |
| url | http://www.sciencedirect.com/science/article/pii/S1876380419602466 |
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