Geological characteristics and exploration potential of diamictite tight oil in the second Member of the Permian Lucaogou Formation, Santanghu Basin, NW China
Based on the latest exploration data of tight oil, the evaluation of the “seven properties” relation of diamictite tight oil in the second Member of the Permian Lucaogou Formation in Santanghu Basin was carried out. The second Member of the Lucaogou Formation developed a new suit of high-quality hyd...
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| Format: | Article |
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KeAi Communications Co., Ltd.
2015-12-01
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| Series: | Petroleum Exploration and Development |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S187638041530080X |
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| author | Xinning LI Qiang MA Hui LIANG Pin ZHANG Qi ZHANG Xueli JIA Zhenshan PU Ligang YAN Yuanlin MENG |
| author_facet | Xinning LI Qiang MA Hui LIANG Pin ZHANG Qi ZHANG Xueli JIA Zhenshan PU Ligang YAN Yuanlin MENG |
| author_sort | Xinning LI |
| collection | DOAJ |
| description | Based on the latest exploration data of tight oil, the evaluation of the “seven properties” relation of diamictite tight oil in the second Member of the Permian Lucaogou Formation in Santanghu Basin was carried out. The second Member of the Lucaogou Formation developed a new suit of high-quality hydrocarbon source rocks, which are characterized by wedging distribution, big thickness, high organic content and good organic type, and the overall being in the oil-generating window. Complex in lithology, the second Member of the Lucaogou Formation is a set of laminated structure diamictite combination composed of detrital material of terrigenous origin, dust fall, carbonate rock in variable proportions. With low natural gamma and high electrical resistivity, strong heterogeneity, micropores as main matrix porosity, it has features of ultra-low porosity and extra-low permeability; the fractures in it provide some reservoir space, and make great contribution to permeability. The Member has good oiliness (oil saturation from conventional core analysis is 15%−80%), high content of brittle minerals (80%−90%), clay mineral content of less than 10% in general; core sensitivity test shows that it varies widely in water sensitivity and velocity sensitivity, and is weak in acid sensitivity. Through evaluating the “seven properties” relation, it is concluded that the main control factors of the tight oil layer are the maturity of hydrocarbon source rock and reservoir physical property. The “sweet spots” of diamictite tight oil in the second Member of the Lucaogou Formation were selected, that is, the areas with favorable reservoir physical properties in the mature hydrocarbon source rock of the sag. Key words: Santanghu Basin, Permian Lucaogou Formation, tight oil, diamictite, geological characteristics, exploration potential |
| first_indexed | 2024-12-17T21:40:37Z |
| format | Article |
| id | doaj.art-8374b16005f3400aae15656b7881694d |
| institution | Directory Open Access Journal |
| issn | 1876-3804 |
| language | English |
| last_indexed | 2024-12-17T21:40:37Z |
| publishDate | 2015-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum Exploration and Development |
| spelling | doaj.art-8374b16005f3400aae15656b7881694d2022-12-21T21:31:38ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042015-12-01426833843Geological characteristics and exploration potential of diamictite tight oil in the second Member of the Permian Lucaogou Formation, Santanghu Basin, NW ChinaXinning LI0Qiang MA1Hui LIANG2Pin ZHANG3Qi ZHANG4Xueli JIA5Zhenshan PU6Ligang YAN7Yuanlin MENG8Exploration and Development Institute of PetroChina Tuha Oilfield Company, Tuha 839009, China; Corresponding authorExploration and Development Institute of PetroChina Tuha Oilfield Company, Tuha 839009, ChinaExploration and Development Institute of PetroChina Tuha Oilfield Company, Tuha 839009, ChinaExploration and Development Institute of PetroChina Tuha Oilfield Company, Tuha 839009, ChinaExploration and Development Institute of PetroChina Tuha Oilfield Company, Tuha 839009, ChinaExploration and Development Institute of PetroChina Tuha Oilfield Company, Tuha 839009, ChinaExploration and Development Institute of PetroChina Tuha Oilfield Company, Tuha 839009, ChinaExploration and Development Institute of PetroChina Tuha Oilfield Company, Tuha 839009, ChinaCollege of Geosciences, Northeast Petroleum University, Daqing 163318, ChinaBased on the latest exploration data of tight oil, the evaluation of the “seven properties” relation of diamictite tight oil in the second Member of the Permian Lucaogou Formation in Santanghu Basin was carried out. The second Member of the Lucaogou Formation developed a new suit of high-quality hydrocarbon source rocks, which are characterized by wedging distribution, big thickness, high organic content and good organic type, and the overall being in the oil-generating window. Complex in lithology, the second Member of the Lucaogou Formation is a set of laminated structure diamictite combination composed of detrital material of terrigenous origin, dust fall, carbonate rock in variable proportions. With low natural gamma and high electrical resistivity, strong heterogeneity, micropores as main matrix porosity, it has features of ultra-low porosity and extra-low permeability; the fractures in it provide some reservoir space, and make great contribution to permeability. The Member has good oiliness (oil saturation from conventional core analysis is 15%−80%), high content of brittle minerals (80%−90%), clay mineral content of less than 10% in general; core sensitivity test shows that it varies widely in water sensitivity and velocity sensitivity, and is weak in acid sensitivity. Through evaluating the “seven properties” relation, it is concluded that the main control factors of the tight oil layer are the maturity of hydrocarbon source rock and reservoir physical property. The “sweet spots” of diamictite tight oil in the second Member of the Lucaogou Formation were selected, that is, the areas with favorable reservoir physical properties in the mature hydrocarbon source rock of the sag. Key words: Santanghu Basin, Permian Lucaogou Formation, tight oil, diamictite, geological characteristics, exploration potentialhttp://www.sciencedirect.com/science/article/pii/S187638041530080X |
| spellingShingle | Xinning LI Qiang MA Hui LIANG Pin ZHANG Qi ZHANG Xueli JIA Zhenshan PU Ligang YAN Yuanlin MENG Geological characteristics and exploration potential of diamictite tight oil in the second Member of the Permian Lucaogou Formation, Santanghu Basin, NW China Petroleum Exploration and Development |
| title | Geological characteristics and exploration potential of diamictite tight oil in the second Member of the Permian Lucaogou Formation, Santanghu Basin, NW China |
| title_full | Geological characteristics and exploration potential of diamictite tight oil in the second Member of the Permian Lucaogou Formation, Santanghu Basin, NW China |
| title_fullStr | Geological characteristics and exploration potential of diamictite tight oil in the second Member of the Permian Lucaogou Formation, Santanghu Basin, NW China |
| title_full_unstemmed | Geological characteristics and exploration potential of diamictite tight oil in the second Member of the Permian Lucaogou Formation, Santanghu Basin, NW China |
| title_short | Geological characteristics and exploration potential of diamictite tight oil in the second Member of the Permian Lucaogou Formation, Santanghu Basin, NW China |
| title_sort | geological characteristics and exploration potential of diamictite tight oil in the second member of the permian lucaogou formation santanghu basin nw china |
| url | http://www.sciencedirect.com/science/article/pii/S187638041530080X |
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