The origin and distribution of crude oil in Zhu III sub-basin, Pearl River Mouth Basin, China

Quan, Yongbin; Liu, Jianzhang; Zhao, Dijiang; Hao, Fang; Wang, Zhenfeng; Tian, Jinqiang

doi:10.1016/j.marpetgeo.2015.07.015

Cited by 42 publications

(21 citation statements)

References 38 publications

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“…The northern uplift zone, northern sub-basin zone, and central uplift zone are in the shallow-water area of PRMB and the other two tectonic zones are the deep-water area (Mi et al, 2018). Many petroleum reservoirs have been discovered in the Zhu I and Zhu III sub-basins, and most of the oil is originated from the Wenchang Formation source rocks (Hu et al, 2015;Quan et al, 2015;Peng et al, 2017).…”

Section: Geological Backgroundmentioning

confidence: 99%

“…A series of oil reservoirs has been discovered in the shallow-water area of PRMB and the oil is normal crude oil, with densities from 0.8 to 0.95 g/cm 3 (Hu et al, 2015;Peng et al, 2016b). According to oil-source correlation, most of these oil reservoirs were derived from Wenchang Formation source rocks (Hu et al, 2015;Quan et al, 2015;Peng et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Petroleum Migration Characteristics in the Northeastern Part of the Baiyun Depression, Pearl River Mouth Basin, South China Sea

Zeng

Wang

Guo³

et al. 2021

Acta Geologica Sinica (Eng)

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This paper investigates the origin and migration characteristics of petroleum in the northeastern part of the Baiyun Depression, Pearl River Mouth Basin (PRMB). The discovered petroleum in the study area is mainly located in the Lower Zhujiang Member (N 1 z 2) and mainly originated from the Enping Formation source rocks in the eastern sag. Active faults (vertical migration) and N 1 z 2 sandstones (lateral migration) acted as the petroleum migration systems. The fault activities in the Dongsha event controlled the episodic petroleum migration. Fractures in the fault zones provided effective conduits, and overpressure was the driving force. The vertical migration could not cross the fault zones laterally. The petroleum injection areas in the carrier beds were the contact zones of petroleum-migration faults and carrier beds. The lateral migration was steady-state migration, and buoyancy was the driving force. The migration pathways in the carrier beds were controlled by the structural morphology. Secondary petroleum migration in the study area could be divided into two parts: vertical migration along the fractures in the fault zones and lateral migration through preferential petroleum migration pathways (PPMPs) in the carrier beds. The petroleum migration behaviors, including migrating direction, driving force, and migration pattern, in the faults and sandstone carrier beds were quite different. This study provides a typical example for comprehending secondary migration processes and has great importance for determining future exploration targets in the deep-water area of the PRMB.

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Section: Geological Backgroundmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Petroleum Migration Characteristics in the Northeastern Part of the Baiyun Depression, Pearl River Mouth Basin, South China Sea

Zeng

Wang

Guo³

et al. 2021

Acta Geologica Sinica (Eng)

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“…The eastern part of the basin includes Zhu I Superdepression, Zhu II Superdepression, Dongsha Uplift, and Panyu Uplift, while the western part is mainly composed of Zhu III Superdepression and Shenhu Uplift (Wang et al., 2017; Figure 1). The Zhu III Superdepression is further divided into seven tectonic units in the NE–SW direction by the secondary basement fault, namely, the Qionghai Depression and Yangjiang Depression in the north, the Qionghai Uplift and Yangjiang Low Uplift in the middle, and the Wenchang Depression, with the largest area and the deepest sedimentation in the south (the Wenchang A and B Sags are the main units discussed in this study) (Cheng et al., 2013b; Quan et al., 2015; Figure 1). Furthermore, the Wenchang 5, 6, 9, 10, and 14 subsags form the Wenchang A Sag, while the Wenchang B Sag is composed only of the Wenchang 19 subsag.…”

Section: Geological Settingmentioning

confidence: 99%

“…As a secondary tectonic unit, the Wenchang Depression has a similar sedimentary and tectonic evolutionary process to the entire Zhu III Superdepression (Cheng et al., 2013a; Quan et al., 2015).…”

Section: Geological Settingmentioning

confidence: 99%

“…The Wenchang Depression, primarily the Wenchang A and B Sags, consists of two sets of source rocks: the Wenchang Formation (E 2 w) and E 3 e (Cui et al., 2009; Quan et al., 2015). A previous study divided the source rocks into three types: medium-deep lacustrine source rocks of E 2 w in the Wenchang A and B Sags, shallow lake source rocks of E 2 w distributed in an similar area to the former, and lacustrine swamp source rocks of E 3 e developed only in the Wenchang A Sag (Xie et al., 2012; Zhu et al., 1999).…”

Section: Introductionmentioning

confidence: 99%

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Quality, hydrocarbon generation, and expulsion of the Eocene Enping Formation source rocks in the Wenchang Depression, western Pearl River Mouth Basin, South China Sea

Chen

Chang

et al. 2020

Energy Exploration & Exploitation

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Recently, increasing numbers of oil and gas reservoirs have been discovered in the Wenchang Depression, western Pearl River Mouth Basin, South China Sea, revealing prospects for hydrocarbon exploration. The Enping Formation (E3e) is a key target layer for the development of source rocks. However, previous work has only focused on lacustrine swamp source rocks of E3e in the Wenchang A Sag, without a systematic study of shallow lacustrine source rocks. In this study, the quality of E3e shallow lacustrine source rocks is reevaluated, and the hydrocarbon generation and expulsion characteristics are analyzed using relevant geological data and constructing a conceptual model. The results show that the E3e2 source rocks have greater thickness (50–600 m) and similar organic matter abundance (0.5–2.5%) compared with the E3e1 source rocks (50–500 m and 0.5–2.5%). On the whole, the E3e source rocks were deposited in the continental environment and are dominated by Type II and Type III kerogen. Meanwhile, the E3e source rocks of the Wenchang A Sag are in the stage of mature to over mature, while those of the Wenchang B Sag are in the stage of low mature. Vertically, the hydrocarbon generation potential of the E3e2 source rocks is greater than E3e1. Also, the cumulative hydrocarbon production of steep slope in the Wenchang A Sag is larger than that in the Wenchang B Sag. In addition, the corresponding vitrinite reflectances of hydrocarbon expulsion threshold and peak are 0.72 and 0.96%, respectively. Horizontally, four hydrocarbon generation and expulsion centers were mainly concentrated in different subsags of the Wenchang A and B Sags for E3e. The maximum values of hydrocarbon generation and expulsion intensity for E3e1 are 1500 × 104 t/km2 and 1000 × 104 t/km2, respectively, while those for E3e2 are 1800 × 104 t/km2 and 1200 × 104 t/km2, respectively, with the expulsion efficiency of 75%.

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Geochemical characteristics and origin of crude oil and natural gas in different areas of Wenchang-A Sag, Pearl River Mouth Basin, South China Sea

Fu,

Chen,

et al. 2024

Front. Earth Sci.

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The origin and distribution of crude oil in Zhu III sub-basin, Pearl River Mouth Basin, China

Cited by 42 publications

References 38 publications

Petroleum Migration Characteristics in the Northeastern Part of the Baiyun Depression, Pearl River Mouth Basin, South China Sea

Petroleum Migration Characteristics in the Northeastern Part of the Baiyun Depression, Pearl River Mouth Basin, South China Sea

Quality, hydrocarbon generation, and expulsion of the Eocene Enping Formation source rocks in the Wenchang Depression, western Pearl River Mouth Basin, South China Sea

Geochemical characteristics and origin of crude oil and natural gas in different areas of Wenchang-A Sag, Pearl River Mouth Basin, South China Sea

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