Characteristics and favorable area prediction of Ordovician buried-hill carbonate reservoirs in the Bozhong 21-2 tectonic belt, Bohai Bay Basin, China

Based on core data, thin section and logging, this study investigates the basic characteristics and occurrence regularities of the Ordovician buried-hill carbonate reservoir in the Bozhong 21-2 tectonic belt. Results show that the reservoir lithology is primarily limestone, followed by dolomite, dol...

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Bibliographic Details
Published in:Petroleum science and technology 2018-09, Vol.36 (17), p.1374-1381
Main Authors: Ren, ChangQing, Gao, XianZhi, Jiang, Haishen, Li, JiuMei, He, FuGui
Format: Article
Language:English
Subjects:
Bozhong 21-2 tectonic belt
carbonate
karstification
Ordovician
reservoir space
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Summary:Based on core data, thin section and logging, this study investigates the basic characteristics and occurrence regularities of the Ordovician buried-hill carbonate reservoir in the Bozhong 21-2 tectonic belt. Results show that the reservoir lithology is primarily limestone, followed by dolomite, dolomitic limestone or limey dolomite, and silty mudstone. The reservoir spaces are primarily composed of secondary porosity. These reservoirs can be divided vertically into weathered-crust karst reservoirs and inner dissolution-type reservoirs. The distribution of reservoirs is controlled chiefly by karstification. The high karst units in the study area are favorable for the development of the two reservoir types.
ISSN:1091-6466
1532-2459
DOI:10.1080/10916466.2018.1474222