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| Main Controlling Factors and Accumulation Model of Chang 9 Reservoir in Northwest Ordos Basin, China |
| Zhang Weigang1,2, Chen Gang1 |
1. Department of Geology, Northwest University;
2. Oil Production Plant No.8, Changqing Oilfield Company |
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Abstract In northwestern Ordos Basin, the Triassic reservoir Chang 9 has favorable reservoir forming conditions, extensive reservoir development, and huge potential for oil exploration and exploitation. Studying the main controlling factors and accumulation model of Chang 9 reservoir in this area can provide a basis for the production targets, and assist in formulating reasonable development technology policy. In this paper, to explore and summarize the hydrocarbon accumulation model, the Chang 9 reservoir were analyzed from the aspects of oil source, fracture, oil migration, structure, lithology and reservoir physical properties for the main controlling factors in this area. Organic geochemical and geological comprehensive analysis that the oil-source of the Chang 9 reservoir in the northwest of Ordos Basin is derived from Chang 7 hydrocarbon source rocks. The fractures provide a sound channel for the "vertical multi-point filling" of the oil source from Chang 7 to Chang 9. The crude oil migrates vertically from Chang 7 to Chang 9, then expands horizontally to form a reservoir. Structures play an important role in controlling the distribution of reservoirs, the control by sand in small layer and physical property is also obvious. This paper creatively establishes the reservoir accumulation model of Chang 9 in northwest of Ordos Basin, which is characterized by Vertical multi-point filling, horizontal expansion becomes oil pool. It reveals the genetic mechanism of the development of Chang 9 multi-reservoir in the study area, which provides guidance for exploration and evaluation deployment.
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Published: 05 November 2022
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| [1] |
. TotalEnergies in China[J]. China Oil & Gas, 2022, 29(3): 29-35. |
| [2] |
. Growing Along with the Myanmar-China Oil and Gas Pipeline[J]. China Oil & Gas, 2022, 29(3): 59-60. |
| [3] |
Dou Lirong, Yuan Shengqiang, Liu Xiaobing. Overseas Oil and Gas Exploration of Chinese Oil Companies:Challenges and Solutions[J]. China Oil & Gas, 2022, 29(2): 3-8. |
| [4] |
Wang Zhen, Ma Jie. Challenges and Opportunities Facing China's Oil and Gas Industry[J]. China Oil & Gas, 2022, 29(2): 9-15. |
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2019, Vol. 26 
