Fault-fracture mesh petroleum plays in the Zhanhua Depression, Bohai Bay Basin: Part 2. Oil-source correlation and secondary migration mechanisms

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

doi:10.1016/j.orggeochem.2004.09.003

Cited by 46 publications

(15 citation statements)

References 12 publications

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“…In the central part of the depression, an oil reservoir which locates in igneous intrusions and their aureoles was discovered at the depth of about 3050–3300 m and has been being exploited in past decade (Liu et al ., ). Two contiguous doleritic sills were identified in the middle of Es 3 source rock: the upper sill is about 120‐m thick and the lower one is about 110 m. As the middle part of Es 3 (Es 3 M ) consists of thick dark mudstones, and the lower part (Es 3 L ) is composed of oil shales (Shi et al ., ), the contact between the two layers can be opened due to the magma‐induced tensile stress, or the stiffer Es 3 M in relation to Es 3 L may stop the penetration of the dyke. As a result, the magma intruded parallel to the formation and form sills between Es 3 M and Es 3 L .…”

Section: Geological Settingmentioning

confidence: 99%

Numerical modelling of the hydrocarbon generation of Tertiary source rocks intruded by doleritic sills in the Zhanhua depression, Bohai Bay Basin, China

Wang

Meng

et al. 2011

Basin Research

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An igneous hydrocarbon reservoir had been found in the Zhanhua depression, Bohai Bay Basin, eastern China. Two doleritic sills successively intruded into the immature source rock of the third member of the Shahejie Formation (Es3). The heat released from the magma changed the mineral composition of wall rocks and accelerated the maturity of organic matter. Thin hornfels and carbargilite zones were found next to the sills. The vitrinite reflectances (%R o ) of these heated wall rocks increased to at least 1.4% near the contacts (<50 m), and accumulation of oil was found in the hornfels zone and dolerite bodies. With the aim of understanding the influence of the sills on the hydrocarbon generation process, a complex heat conduction model was used to simulate the thermal history of the organic-rich wall rocks, in which both the latent heat of crystallization of intrusions and vapourization heat of pore water in wall rocks were considered. The simulation results suggested that the cooling of each sill continued for about 0.1 Ma after its emplacement and the temperature of wall rocks was considerably raised. The peak temperature (T peak ) that wall rocks experienced can reach 460-650°C in the region of 10 m away from the contacts. The thermal model was qualitatively verified by comparing the experimental data of vitrinite reflectances and mineral geothermometers of the wall rocks with the simulation results. Furthermore, we modelled the hydrocarbon generation of the source rocks based on the simulated thermal history. In the region of about 100 m from the contacts, the organic matter was heated and partially transformed into hydrocarbon within only a few 1000 years, which was significantly faster than the normal burial generation process.

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Section: Geological Settingmentioning

confidence: 99%

Numerical modelling of the hydrocarbon generation of Tertiary source rocks intruded by doleritic sills in the Zhanhua depression, Bohai Bay Basin, China

Wang

Meng

et al. 2011

Basin Research

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“…2). The potential source rocks are considered located in the upper Es 4 , Es 3 , and Es 1 members (Shi et al 2005;Song and Men 2019). The lower Es 4 comprises mudstone with anhydrate and salt while the upper Es 4 contains laminated oil shale and lime mudstone with carbonate, interpreted as saline lake deposits during lake contraction (Liu 2017;Song and Men 2019).…”

Section: Geological Settingsmentioning

confidence: 99%

“…However, the origin of oil and gas has remained as the focus. In previous geochemical studies of oil-source correlations in Zhanhua (e.g., Shi et al 2005;Wang 2011;Song and Men 2019), compoundspecific isotopic data was rarely reported compared to the biomarker. This study investigates both biomarkers and stable carbon isotopic compositions of n-alkanes from oils in Zhanhua Depression.…”

Section: Introductionmentioning

confidence: 99%

Organic geochemical characteristics of Eocene crude oils from Zhanhua Depression, Bohai Bay Basin, China

et al. 2020

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Geochemical studies of crude oil and source rock play an important role in future exploration in Zhanhua Depression. In this study, thirty-one oil samples collected from Shahejie Formation in Zhanhua Depression, Bohai Bay Basin, NE China have been geochemically analyzed and their organic geochemical characteristics have been applied to differentiate groups of oils. These oil samples can be classified into two families based on multiple biomarker proxies and stable carbon isotopic values. Family I is characterized by a low ratio of pristane over phytane (Pr/Ph \ 0.7), a relatively high ratio of phytane over n-C 18 (Ph/n-C 18 ), varying ratios of gammacerane over C 30 hopane (Ga/C 30 H) and C 22 /C 21 tricyclic terpane, and a low ratio of C 19 /C 23 tricyclic terpane. Family II is marked by a relatively high Pr/Ph ratio (0.7-1.6), relative low ratios of Ph/n-C 18 and C 22 /C 21 tricyclic terpane, and avarying ratio of C 19 /C 23 tricyclic terpane. Both families I and II within these crude oils can be subdivided into two families based on different values of stable carbon isotopic composition of individual n-alkanes. Moreover, the potential source rocks of oil samples in Family I and Family II were likely derived from the upper Es 4 member and Es 3 member, respectively, based on the correlation of organic geochemical characteristics of the oils and source rocks. The results of oil-source rock correlation provide insight into the process from oil generation to migration and to final accumulation, providing a better understanding of factors controlling oil-gas distribution for prediction of sweet spots.

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“…Extensional stress along three mantle uplift belts caused rifting and subsidence and led to the development of a series of grabens and half grabens (Allen et al., 1997; Hao et al., 2007; Huang and Pearson, 1999; Luo et al., 1999). The Zhanhua Depression with an area of 3610 km 2 is one of the half grabens within the Bohai Bay Basin, and it is formed by events in late Jurassic and early Tertiary (Shi et al., 2005). The Zhanhua Depression is bounded by the Wuhaozhuang-Changdi uplift in the east, Chenjiazhuang and Kendong uplift in the south, and the Yihezhuang and Chengdong uplift in the north (Figure 1a).…”

Section: Geological Settingmentioning

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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Fault-fracture mesh petroleum plays in the Zhanhua Depression, Bohai Bay Basin: Part 2. Oil-source correlation and secondary migration mechanisms

Cited by 46 publications

References 12 publications

Numerical modelling of the hydrocarbon generation of Tertiary source rocks intruded by doleritic sills in the Zhanhua depression, Bohai Bay Basin, China

Numerical modelling of the hydrocarbon generation of Tertiary source rocks intruded by doleritic sills in the Zhanhua depression, Bohai Bay Basin, China

Organic geochemical characteristics of Eocene crude oils from Zhanhua Depression, Bohai Bay Basin, China

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

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