Depositional system and hydrocarbon accumulation in Gubei slope zone, Zhanhua Depression, Bohai Bay Basin, eastern China
| Autor: | Chaochao Jia, Kurt O. Konhauser, Ling Guo |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Bohai bay
Renewable Energy Sustainability and the Environment 020209 energy Eastern china Geochemistry Energy Engineering and Power Technology 02 engineering and technology Structural basin 010502 geochemistry & geophysics 01 natural sciences Sedimentary depositional environment Fuel Technology Nuclear Energy and Engineering Depression (economics) Oil production 0202 electrical engineering electronic engineering information engineering Geomorphology Geology 0105 earth and related environmental sciences |
| Zdroj: | Energy Exploration & Exploitation. 34:810-827 |
| ISSN: | 2048-4054 0144-5987 |
| DOI: | 10.1177/0144598716665015 |
| Popis: | The Zhanhua Depression is a hydrocarbon-rich, fault-generated depression in Bohai Bay Basin, eastern China. Gubei slope zone, located in eastern Zhanhua Depression, is an important oil production region. Drilling cores, logging data, and 3D seismic data were used to identify several depositional system infilling the slope zone, including braided-delta, sublacustrine fans, and deep/semi-deep lake fine-grained deposits and turbidite, all of which are associated with a lacustrine succession belonging to the 3rd member of Shahejie Formation (Es3). Sedimentary rock of Es3 are composed of mudstone, silty mudstone, fine sandstone, coarse sandstones, and conglomeratic sandstones with various structures including massive bedding, parallel bedding, scour-fill structures, graded bedding, and deformed structures. Sandstone distributed in braided-delta front subfacies, lacustrine fans and some turbidite are favorable reservoir facies. Fault system was an important hydrocarbon migration pathway and sometimes a sealing geologic unit, which played an important role in the formation of commercial oil reservoirs in Gubei slope zone. The commercial oil reservoir is dominantly distributed in ridge-like structures in Gubei slope zone, which give an inspiration that ridge-like structure was probably a very favorable area for hydrocarbon exploration in continental basin slope zone. |
| Databáze: | OpenAIRE |
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