TITLE:
Reservoir Characterization of Special Dolomite Rock of Fengcheng Formation in Junggar Basin, China
AUTHORS:
Famu Huang, Yun Liu, Chenhao Pan, Duocai Wang, Ping Zhang, Yaping Fu, Hong Zhang, Haibo Su, Jun Lu, Zhi Zhong, Bin Wei
KEYWORDS:
Junggar Basin, Fengcheng Formation Section II, Paragenesis, Dolomitic Tuff, Fracture
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.11 No.9,
September
28,
2023
ABSTRACT: Dolomites and eruptive rocks are well-developed in the Permian Fengcheng
Formation in Junggar Basin in China, in which oil and gas are accumulated
extensively. Until now, high-yield industrial oil and gas flows have been obtained
in the dolomitic tuff of the second unit of the Fengcheng Formation, which
demonstrates the huge exploration potential of the thick layer of massive dolomitic
tuff. The lithology of the second unit of the Fengcheng Formation in this area has gradually transformed from the dolomite, dolomitic tuff to siltstone from east to west. Moreover, the well
testing shows that the reservoir is
oil-saturated, and the production rate mainly depends on the reservoir’s physical properties and fracture development. In this study, different types of
data including core data, well log and seismic data are used cooperatively to characterize the sedimentary, structure and
fracture features of the Fengcheng Formation, and then characterize the promising target zone in the study area. The result indicates that hydrocarbons
are most accumulated along the deep fault
in the Wu-Xia fault zone, which will be the favorable zone for the next progressive exploration.