Fault-fracture mesh petroleum plays in the Zhanhua Depression, Bohai Bay Basin: Part 1. Source rock characterization and quantitative assessment

Wang, Yongshi; Li, Maowen; Pang, Xiongqi; Zhang, Shanwen; Shi, Dishi; Dongxia,

doi:10.1016/j.orggeochem.2004.08.003

Cited by 52 publications

(24 citation statements)

References 7 publications

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“…The source rock of the Gubei Sag is distributed mainly within the Shahejie Formation, and coal-bearing rock series in Mesozoic and upper Palaeozoic stratum also provided some hydrocarbon (Wang et al., 2005; Yang et al., 2008). Previous studies have been confirmed that grey/black mudstone developed in Es 3 and Es 4 in this area are very good hydrocarbon source rocks (Wang et al., 2012).…”

Section: Discussionmentioning

confidence: 99%

Depositional system and hydrocarbon accumulation in Gubei slope zone, Zhanhua Depression, Bohai Bay Basin, eastern China

Guo

Jia

Konhauser

2016

Energy Exploration & Exploitation

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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 (Es 3 ). Sedimentary rock of Es 3 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.

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Section: Discussionmentioning

confidence: 99%

Depositional system and hydrocarbon accumulation in Gubei slope zone, Zhanhua Depression, Bohai Bay Basin, eastern China

Guo

Jia

Konhauser

2016

Energy Exploration & Exploitation

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“…Major elements were determined by X-ray fluorescence spectrometry (XRF). Samples were prepared as glass chips using a Rigaku desktop fusion machine, formed by mixing 0.5000 g of rock powder (dried at Wang et al, 2005). 100°C) with 4.0000 g of lithium tetraborate for 15 minutes at 1200°C in 95% Pt-5% Au crucibles.…”

Section: Sampling and Analytical Methodsmentioning

confidence: 99%

“…The upper Ng 1 consists mainly of red, purple, grayish and green-coloured mudstone, siltstone and fine-grained sandstone interbeds. The proportion of argillaceous component becomes gradually high toward the top, indicating the shrinkage of the sedimentary basin (Wang et al, 2005). The Pliocene Minhuazhen Fm.…”

Section: Geological Setting and Stratigraphymentioning

confidence: 99%

Geochemistry of Neogene sedimentary rocks from the Jiyang basin, North China Block: The roles of grain size and clay minerals

et al. 2008

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Major and trace element compositions of 83 fine-grained sedimentary rocks (including 14 fine-grained sandstones, 24 siltstones and 45 mudstones) from the Zhanhua Sag of Jiyang basin in the North China Block were analyzed to investigate the effects of sedimentary processes (e.g., source provenance, mineral assemblage, grain size and chemical weathering etc.) on the bulk chemical compositions. Compared with the average upper continental crust (UCC), these rocks have higher TiO 2 , Al 2 O 3 , Fe 2 O 3 , Ba, Th, U, Nb, Ta, Zr, Hf, Y and REE, but lower SiO 2 , MnO, MgO, CaO, K 2 O, Na 2 O, P 2 O 5 , Cr, Co, Ni and Sr. From sandstones, siltstones to mudstones, there exist systematic increase in Rb, Cs, V, Cr, Co, Ni, Nb, Ta, Th, U and REE, and decrease in SiO 2 , K 2 O, Na 2 O and Ba. Such variation trends reflect a predominant role of grain size effect on the geochemistry of these sediments. K 2 O, Na 2 O, Ba, Zr and Hf positively correlate with SiO 2 and negatively correlate with Al 2 O 3 , whereas other elements generally show negative correlations with SiO 2 and positive correlations with Al 2 O 3 , suggesting that clay minerals are major hosts for most elements, while quartz and feldspar exert a dilution effect. The accessory heavy minerals exert a minor control on the bulk REE composition of the sediments, e.g., the contribution of heavy minerals (apatite, zircon, sphene, monazite etc.) to the bulk REE concentrations is less than 20%. Our results show that grain size and clay minerals are the two most important factors to control the bulk chemical compositions of the Zhanhua Sag sediments, and probably terrestrial fine-grained sediments in general.

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“…This suggests that source rock-connecting deep faults may play a vital role in vertical oil migration. This was the mechanism proposed to explain the occurrence of deep sourced oils in the shallow conventional reservoirs in the adjacent Zhanhua Depression Wang et al, 2005;Shi et al, 2005). Similar mechanisms were also suggested in other Tertiary rifted basins (Hwang et al, 2002;Li et al, 2006aLi et al, , 2006bLi et al, , 2008.…”

Section: Revised Models For Oil Charging In Subtle Petroleum Trapsmentioning

confidence: 96%

Molecular and isotopic evidence for mixed-source oils in subtle petroleum traps of the Dongying South Slope, Bohai Bay Basin

Li¹,

Pang²,

Jin³

et al. 2010

Marine and Petroleum Geology

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Fault-fracture mesh petroleum plays in the Zhanhua Depression, Bohai Bay Basin: Part 1. Source rock characterization and quantitative assessment

Cited by 52 publications

References 7 publications

Depositional system and hydrocarbon accumulation in Gubei slope zone, Zhanhua Depression, Bohai Bay Basin, eastern China

Depositional system and hydrocarbon accumulation in Gubei slope zone, Zhanhua Depression, Bohai Bay Basin, eastern China

Geochemistry of Neogene sedimentary rocks from the Jiyang basin, North China Block: The roles of grain size and clay minerals

Molecular and isotopic evidence for mixed-source oils in subtle petroleum traps of the Dongying South Slope, Bohai Bay Basin

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