Characteristics of source rock controlling hydrocarbon distribution in Huizhou Depression of Pearl River Mouth Basin, South China Sea

Jiang, Hang; Pang, Xiongqi; Chen, Di; Peng, Huijie; Qiu-hua, YU; Zhang, Xue

doi:10.1016/j.petrol.2018.08.031

Cited by 10 publications

(8 citation statements)

References 14 publications

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“…The Wenchang and Enping Formations are the important source rocks in the PRMB (Hu et al, 2015;Jiang et al, 2015Jiang et al, , 2018Quan et al, 2015;Peng et al, 2016aPeng et al, , 2017Peng et al, , 2018. Because the Baiyun Depression is located in the deep-water area of the PRMB and the Wenchang and Enping Formations are deeply buried, there are few published studies about the source rocks in the Baiyun Depression.…”

Section: Characteristics Of the Source Rocksmentioning

confidence: 99%

“…The Wenchang Formation in the Zhu III sub-basin contains much oilprone organic matter, and the Enping Formation has high terrestrial-plant debris and produces mainly gas (Quan et al, 2015). The Wenchang Formation in the Huizhou Depression (a depression in the Zhu I sub-basin) was deposited in a semi-deep to deep lacustrine environment and contains mainly type II kerogen (Jiang et al, 2015(Jiang et al, , 2018Peng et al, 2016aPeng et al, , 2017. The Enping Formation in the Huizhou Depression was derived from terrigenous plant material.…”

Section: Characteristics Of the Source Rocksmentioning

confidence: 99%

“…The Enping Formation in the Huizhou Depression was derived from terrigenous plant material. The kerogen is mainly type II 2 to III (Jiang et al, 2018;Peng et al, 2018). As the Enping mudstone samples from the deeper sags have rarely been obtained and the Enping Formation may contribute some of the oil in the Huilu area of the PRMB, the Enping Formation source rocks from the deeper sags may contain some oilprone organic matter (Peng et al, 2018).…”

Section: Characteristics Of the Source Rocksmentioning

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: Characteristics Of the Source Rocksmentioning

confidence: 99%

Section: Characteristics Of the Source Rocksmentioning

confidence: 99%

Section: Characteristics Of the Source Rocksmentioning

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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“…Few studies are documented about the deep-water area. The previous studies indicate that the Wenchang Formation is the dominant source rocks of hydrocarbon reservoirs in the shallow-water area of the PRMB. − ,, However, the petroleum in the deep-water area is likely to come from the source rocks in the Enping Formation. ,,,− Because the petroleum in the deep-water area of PRMB is different from that in the shallow-water area, there may be distinct differences between the source rocks in the deep-water area and those in the shallow-water area. Besides, the Baiyun Depression is one of the most important deep-water exploration areas in China. ,,, Therefore, the geological characteristics and hydrocarbon potential of the Eocene source rocks in the Baiyun Depression are needed to be comprehensively studied.…”

Section: Introductionmentioning

confidence: 99%

“…The Eocene strata are primary source rocks of the PRMB. − The previous studies indicate that the Wenchang Formation is semideep to deep lacustrine black mudstone and the Enping Formation is shallow lacustrine to deltaic swamp-plain dark-gray mudstone. , However, that research mainly focuses on the source rocks in the shallow-water area of the PRMB. Few studies are documented about the deep-water area.…”

Section: Introductionmentioning

confidence: 99%

Geological Characteristics and Hydrocarbon Potential of the Detachment Basin in the Baiyun Depression, Pearl River Mouth Basin, South China Sea

et al. 2019

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Hydrocarbon exploration in the deep-water area of the South China Sea is increasingly important. However, the Eocene strata, which are the primary source rock in the deep-water area of the Pearl River Mouth basin (PRMB), are poorly understood. This article studied the geological characteristics and hydrocarbon potential of the Eocene source rocks in the Baiyun Depression, which is the biggest and most important depression in the deep-water area of the PRMB. In the Eocene, the Baiyun Depression was an asymmetric rift basin that was controlled by the north-dipping detachment faults. A big freshwater lake existed in the study area and a huge delta developed in the northern gentle slope. The delta source rocks had higher total organic carbon and were greatly controlled by terrigenous organic matter input. They were type III kerogen and were likely to produce gas during maturation. The lacustrine source rocks were widely distributed in the center and south and had a higher hydrogen index (HI). They had both terrigenous and aquatic organic matter inputs. The kerogen was type II to III. They could produce both oil and gas during maturation. The Eocene source rocks were widely distributed in the Baiyun Depression. They had a huge thickness and high organic matter abundance. The organic matter had enough maturity to generate hydrocarbon from 18.5 Ma to the present. Therefore, the Eocene source rocks can provide sufficient hydrocarbon resources for deep-water petroleum accumulations and gas hydrate formations in the deep-water area of the PRMB.

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Natural gas potential of Neogene source rocks in the Yiliping area, Qaidam Basin: Using an improved hydrocarbon generation and expulsion model based on least‐squares Monte Carlo

Shao

et al. 2023

Geological Journal

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The Neogene petroleum system in the Yiliping area of the Qaidam Basin presents great prospects for natural gas exploration. However, its natural gas potential, including the source rock characteristics, is insufficient. Due to a lack of geological constraints, the hydrocarbon generation and expulsion (HGE) model, which is widely used in resource potential evaluation, may be unable to obtain optimal parameters. Here, we propose an improved HGE model based on least‐squares Monte Carlo to assess the HGE characteristics and natural gas resource potential of the Neogene source rocks in the Yiliping area by combining geological and geochemical investigations. The findings show that the Neogene source rock is effective and has significant potential for natural gas generation. Algae and bacteria, which were deposited in a saline and anoxic environment, are the primary sources of organic matter in Neogene source rock (primarily Type II and Type III). Modelling work suggests that Type II and III kerogen of Neogene source rock reach hydrocarbon generation threshold (HGT) at Ro = 0.38% and Ro = 0.49% and reach hydrocarbon expulsion threshold (HET) at Ro = 0.45% and Ro = 0.55%. The maximum HGE intensities are 3400 × 104 and 3378 × 104 t/km2. The extra‐source natural gas and shale gas resource potentials are predicted to be 2.05 × 1012 m3 to 4.11 × 1012 m3 and 7.03 × 1012 m3. The findings will guide future Neogene natural gas exploration in the Yiliping area of the Qaidam Basin.

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Characteristics of source rock controlling hydrocarbon distribution in Huizhou Depression of Pearl River Mouth Basin, South China Sea

Cited by 10 publications

References 14 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

Geological Characteristics and Hydrocarbon Potential of the Detachment Basin in the Baiyun Depression, Pearl River Mouth Basin, South China Sea

Natural gas potential of Neogene source rocks in the Yiliping area, Qaidam Basin: Using an improved hydrocarbon generation and expulsion model based on least‐squares Monte Carlo

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