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Academic Journal of Environment & Earth Science, 2023, 5(2); doi: 10.25236/AJEE.2023.050203.

Sedimentary Characteristics of Chang 81 Sub-Member of Yanchang Formation in M Area of the Ordos Basin


Lin Li

Corresponding Author:
Lin Li

School of Geoscience, Yangtze University, Wuhan, China


The Ordos Basin is a significant oil and gas basin. Region M is located southwest of the Ordos Basin. Its Chang 81 sub-member is primarily delta front, with abundant oil, and is the primary exploration and development target series. Deep research into the sedimentary facies of the Chang 81 sub-member has implications for oil and gas exploration. The study area is primarily delta facies, which is further subdivided into four microfacies: underwater distributary channel microfacies, underwater distributary channel inter-facies, estuarine bar microfacies, and sheet sand microfacies, based on core observation, logging interpretation results, and other data, combined with previous understanding and regional sedimentary background and other research results. During the Chang81 period, the entire area is dominated by multi-phase underwater distributary channel sand that is superimposed vertically and distributed in nearly east-west strips.


The Ordos Basin, Yanchang Formation, Sedimentary Characteristics

Cite This Paper

Lin Li. Sedimentary Characteristics of Chang 81 Sub-Member of Yanchang Formation in M Area of the Ordos Basin. Academic Journal of Environment & Earth Science (2023) Vol. 5 Issue 2: 15-21. https://doi.org/10.25236/AJEE.2023.050203.


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