The Differential Genetic Mechanism and Model of the Lower Paleozoic Carbonate Buried Hill Reservoirs in the Western Bohai Sea
Hua Xiaoli
Li Huiyong
Xu Peng
Sun Zhe
Xia Yu
Abstract：Drilling of carbonate buried hills in the Lower Paleozoic in the western Bohai Sea has confirmed that finding thick and high-quality reservoirs is the key to buried hill exploration.According to drilling,there are great differences in the characteristics and distribution of the Lower Paleozoic reservoirs,which reflects the essential differences in the genesis of the reservoirs.Based on the analysis of fault development and tectonic evolution,two types of carbonate buried hills in the western Bohai Sea,denudation residual hill type and denudation fault block type,are established for the first time in this paper.The results show that the residual hill type buried hills form karst reservoirs.The more developed the karst paleo-water system is under the control of micro-paleomorphology,the greater the degree of development of karst reservoirs,and the development pattern of dendritic reservoirs is formed;Fault-block buried hills form fracture-melt reservoirs.In the multi-phase tectonic stress superposition area,effective fractures are more developed and the reservoir thickness is larger,forming a fractured reservoir development model.Identifying the different genesis and patterns of carbonate reservoirs of different buried hill types in the western Bohai Sea has certain guiding significance for the next step of hydrocarbon exploration in carbonate rock areas.
Keywords：western Bohai Seacarbonate buried hilldifferential genesispaleowater systemtectonic stresspetroleum geology
Publication Date：2025-02-14
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 494-503 )