Comparison of Chang 7 Member of Yanchang Formation in Ordos Basin with Bakken Formation in Williston Basin and Its Significance

Abstract

Abstract:

Since the tight oil of Bakken Formation in north America developed successfully in industry，the tight oil has become a hot spot in the exploration and development of unconventional oil and gas resources，and the Chang 7 Member of Yanchang Formation in Ordos Basin has already got a great breakthrough to some extent in this hot area. Based on geological background，lithofacies features，oil-generating conditions and reservoir characteristics，this paper compared the mechanism of petroleum accumulation and the rule of enrichment of the tight oil in Bakken Formation with that in the Chang 7 Member of Yanchang Formation. The results show that the two formations are quite similar in geological background，disposition of source and reservoir rock，characteristics of source rock and reservoir. The only difference is that the average thickness of the shale in Yanchang Formation is thicker than that in the Bakken Formation. The comparison results indicate that the Yanchang Formation in Ordos Basin has a good exploration prospect.

Key words: Ordos Basin, Williston Basin, Bakken Formation, Chant 7 Member of Yanchang Formation, tight oil

CLC Number:

ZHANG Ni-ni，LIU Luo-fu，SU Tian-xi，WU Kang-jun，ZHAO Yuan-yuan. Comparison of Chang 7 Member of Yanchang Formation in Ordos Basin with Bakken Formation in Williston Basin and Its Significance[J]. Geoscience, 2013, 27(5): 1120-1130.

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Comparison of Chang 7 Member of Yanchang Formation in Ordos Basin with Bakken Formation in Williston Basin and Its Significance

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