Characteristics of tight oil in Triassic Yanchang Formation, Ordos Basin
By comprehensive study of reservoir and source rock distribution, petrology and geochemistry, the tight oil and its exploration potential was analyzed in the Triassic Yanchang Formation, Ordos Basin. The Triassic Yanchang Formation is rich in low permeability reservoirs. The proved geological reserv...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2013-04-01
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| Series: | Petroleum Exploration and Development |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1876380413600191 |
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| author | Jingli YAO Xiuqin DENG Yande ZHAO Tianyou HAN Meijuan CHU Jinlian PANG |
| author_facet | Jingli YAO Xiuqin DENG Yande ZHAO Tianyou HAN Meijuan CHU Jinlian PANG |
| author_sort | Jingli YAO |
| collection | DOAJ |
| description | By comprehensive study of reservoir and source rock distribution, petrology and geochemistry, the tight oil and its exploration potential was analyzed in the Triassic Yanchang Formation, Ordos Basin. The Triassic Yanchang Formation is rich in low permeability reservoirs. The proved geological reserves of tight oil, with the permeability less than 2×10−3 μm2, is about two billion tons by now. The tight oil mainly occurs in tight sandstone reservoirs of Chang6-Chang8 oil-bearing members which are close to or interbedded with the oil shale layers, without long-distance migration. The large-scale gravity flow sandstone reservoirs of Chang7 and Chang6 oil-bearing members in the center of the lacustrine basin are particularly tight, with the permeability less than 0.3×10−3 μm2 in general. The tight oil in the Yanchang Formation features large scale in sand body complex, tight reservoir, complicated pore throat structure, high content of rigid components, abundant fractures and saturation, good crude property, low fluid pressure and low oil yield. The formation of large-scale superimposed tight oil reservoirs is controlled by the interbeded lithologic combination of extensive source rocks and reservoirs and the strong hydrocarbon generation and expulsion during geological history. This type of pools is an important potential resource for future oil exploration and development. Key words: tight oil, Yanchang Formation, Ordos Basin, potential resource |
| first_indexed | 2024-12-20T06:50:47Z |
| format | Article |
| id | doaj.art-c237ca74c7c54808b2a8b08a8d59943b |
| institution | Directory Open Access Journal |
| issn | 1876-3804 |
| language | English |
| last_indexed | 2024-12-20T06:50:47Z |
| publishDate | 2013-04-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum Exploration and Development |
| spelling | doaj.art-c237ca74c7c54808b2a8b08a8d59943b2022-12-21T19:49:33ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042013-04-01402161169Characteristics of tight oil in Triassic Yanchang Formation, Ordos BasinJingli YAO0Xiuqin DENG1Yande ZHAO2Tianyou HAN3Meijuan CHU4Jinlian PANG5Exploration & Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an 710018, China; National Engineering Laboratory for Exploration and Development of Low-Permeability Oil Fields, Xi'an 710018, China; Corresponding authorExploration & Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an 710018, China; National Engineering Laboratory for Exploration and Development of Low-Permeability Oil Fields, Xi'an 710018, ChinaExploration & Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an 710018, China; National Engineering Laboratory for Exploration and Development of Low-Permeability Oil Fields, Xi'an 710018, ChinaExploration & Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an 710018, China; National Engineering Laboratory for Exploration and Development of Low-Permeability Oil Fields, Xi'an 710018, ChinaExploration & Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an 710018, China; National Engineering Laboratory for Exploration and Development of Low-Permeability Oil Fields, Xi'an 710018, ChinaExploration & Development Research Institute of PetroChina Changqing Oilfield Company, Xi'an 710018, China; National Engineering Laboratory for Exploration and Development of Low-Permeability Oil Fields, Xi'an 710018, ChinaBy comprehensive study of reservoir and source rock distribution, petrology and geochemistry, the tight oil and its exploration potential was analyzed in the Triassic Yanchang Formation, Ordos Basin. The Triassic Yanchang Formation is rich in low permeability reservoirs. The proved geological reserves of tight oil, with the permeability less than 2×10−3 μm2, is about two billion tons by now. The tight oil mainly occurs in tight sandstone reservoirs of Chang6-Chang8 oil-bearing members which are close to or interbedded with the oil shale layers, without long-distance migration. The large-scale gravity flow sandstone reservoirs of Chang7 and Chang6 oil-bearing members in the center of the lacustrine basin are particularly tight, with the permeability less than 0.3×10−3 μm2 in general. The tight oil in the Yanchang Formation features large scale in sand body complex, tight reservoir, complicated pore throat structure, high content of rigid components, abundant fractures and saturation, good crude property, low fluid pressure and low oil yield. The formation of large-scale superimposed tight oil reservoirs is controlled by the interbeded lithologic combination of extensive source rocks and reservoirs and the strong hydrocarbon generation and expulsion during geological history. This type of pools is an important potential resource for future oil exploration and development. Key words: tight oil, Yanchang Formation, Ordos Basin, potential resourcehttp://www.sciencedirect.com/science/article/pii/S1876380413600191 |
| spellingShingle | Jingli YAO Xiuqin DENG Yande ZHAO Tianyou HAN Meijuan CHU Jinlian PANG Characteristics of tight oil in Triassic Yanchang Formation, Ordos Basin Petroleum Exploration and Development |
| title | Characteristics of tight oil in Triassic Yanchang Formation, Ordos Basin |
| title_full | Characteristics of tight oil in Triassic Yanchang Formation, Ordos Basin |
| title_fullStr | Characteristics of tight oil in Triassic Yanchang Formation, Ordos Basin |
| title_full_unstemmed | Characteristics of tight oil in Triassic Yanchang Formation, Ordos Basin |
| title_short | Characteristics of tight oil in Triassic Yanchang Formation, Ordos Basin |
| title_sort | characteristics of tight oil in triassic yanchang formation ordos basin |
| url | http://www.sciencedirect.com/science/article/pii/S1876380413600191 |
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