TITLE:
The Basic Characteristics and Four-Relationship of the First Reservoir of the Sangonghe Formation in the Mosuowan Area
AUTHORS:
Jing Liu, Ze Zhao
KEYWORDS:
Mosuowan Area, A Section of the Sangonghe Group, Reservoir Characteristics, Four-Sex Relationship
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.13 No.9,
September
26,
2025
ABSTRACT: The Mosuowan area in the Junggar Basin is surrounded by oil source depressions and is characterized by abundant oil and gas resources. Based on a clear understanding of the reservoir’s basic characteristics, an in-depth analysis of the reservoir’s four relationships was conducted. The primary lithologies of the first section of the Sangonghe Formation reservoir include fine sandstone and medium-fine sandstone. Oil leaching is predominantly observed in medium-fine sandstone, whereas fluorescence is more common in fine sandstone. The average porosity and permeability are 10.2% and 2.18 mD, respectively, indicating the presence of low to ultra-low porosity and permeability reservoirs. Among the lithologies, unequal-grained sandstone exhibits the best physical properties, followed by medium-fine sandstone. The oil content shows a negative correlation with both acoustic wave travel time and resistivity. The reservoir characteristics indicate that coarser lithologic grain sizes generally correspond to better physical properties, and better physical properties are associated with higher oil content grades. Clarifying the four relationships of the reservoir enhances the scientific rigor and reliability of reservoir evaluation and provides fundamental theoretical support for the efficient development of oil and gas resources.