基于地球物理和地球化学数据的页岩油甜点区综合预测:以泌阳凹陷核三段5号页岩层为例

尚飞; 解习农; 李水福; 陆永潮

doi:10.3799/dqkx.2018.249

Volume 43 Issue 10

Oct. 2018

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Article Navigation > Earth Science > 2018 > 43(10): 3640-3651

Shang Fei, Xie Xinong, Li Shuifu, Lu Yongchao, 2018. Comprehensive Prediction of Shale Oil Sweet Spots Based on Geophysical and Geochemical Data: A Case Study of the Paleogene Hetaoyuan Formation, Biyang Depression, China. Earth Science, 43(10): 3640-3651. doi: 10.3799/dqkx.2018.249

Citation:

Shang Fei, Xie Xinong, Li Shuifu, Lu Yongchao, 2018. Comprehensive Prediction of Shale Oil Sweet Spots Based on Geophysical and Geochemical Data: A Case Study of the Paleogene Hetaoyuan Formation, Biyang Depression, China. Earth Science, 43(10): 3640-3651. doi: 10.3799/dqkx.2018.249

Citation:

Shang Fei, Xie Xinong, Li Shuifu, Lu Yongchao, 2018. Comprehensive Prediction of Shale Oil Sweet Spots Based on Geophysical and Geochemical Data: A Case Study of the Paleogene Hetaoyuan Formation, Biyang Depression, China. Earth Science, 43(10): 3640-3651. doi: 10.3799/dqkx.2018.249

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Comprehensive Prediction of Shale Oil Sweet Spots Based on Geophysical and Geochemical Data: A Case Study of the Paleogene Hetaoyuan Formation, Biyang Depression, China

doi: 10.3799/dqkx.2018.249

1.
Key Laboratory of Tectonics and Petroleum Resources of China University of Geosciences, Ministry of Education, Wuhan 430074, China
2.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
3.
College of Marine Science and Technology, China University of Geosciences, Wuhan 430074, China

Received Date: 2018-05-22
Publish Date: 2018-10-20

Abstract

Abstract

Shale oil and gas exploration and development in China makes substantive progress, and is likely to be an important successor for oil and gas resources in the future. And the key to improve the drilling encounter rate and oil and gas yield of shale oil is prediction and evaluation of sweet spot.In this paper, taking the 5th organic-matter-rich interval (ORI 5) in the third Member of the Paleogene Hetaoyuan Formation in the Biyang Depression, the key performance indicators are applied to map out sweet spots across the deep depression by comprehensive analysis of various geophysical and geochemical methods. The key indicators are based on a limited number of shale properties, such as lithofacies, oil content, reservoir conditions, and formation pressure. The results show that:(1) The content of brittle minerals is generally larger than 50%, and the calcareous shales and argillaceous shales with silty shales interlayers are advantageous lithofacies for shale oil storage; (2) The indexes of OSI values >200 mg/g TOC and △S₁ values < -2 mg/g Rock indicate the higher content of free shale oil; (3) The interlayer is mainly developed in the periphery of the deep depression, and microfracture is more developed in the derived fracture controlled zones and overlapping areas controlled by faults; (4) Overpressure may have greater impact on the small scale migration and enrichment of shale oil; (5) Shale reservoirs are evaluated based on threshold values of various indicators, and three types of sweet spots are predicted. This paper provides a valid example for comprehensive evaluation and identification of continental shale oil sweet spots using multi-parameters, and has important practical significance for guiding the shale oil exploration.
- sweet spot,
- continental shale oil,
- organic-rich shale,
- Hetaoyuan Formation,
- Biyang Depression,
- petroleum geology

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References(55)

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Comprehensive Prediction of Shale Oil Sweet Spots Based on Geophysical and Geochemical Data: A Case Study of the Paleogene Hetaoyuan Formation, Biyang Depression, China

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