Tectono-sedimentary signature of the second rift phase in multiphase rifts: A case study in the Lufeng Depression (38–33.9 Ma), Pearl River Mouth Basin, south China sea

Ge, Jiawang; Zhu, Xiaomin; Zhao, Xiaoming; Liao, Jijia; Ma, Bingshan; Jones, Brian G.

doi:10.1016/j.marpetgeo.2020.104218

Cited by 30 publications

(14 citation statements)

References 51 publications

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“…The PRMB is made up of roughly NE‐SW trending, alternating structural highs and lows, and is comprised of a proximal, a hyper‐extended, and a distal domain. Two main rifting phases were recorded in the PRMB in relation to the opening of the SCS, an initial one characterized by NNW‐SSE extension in the early to middle Eocene, and a late one with nearly N‐S extension from the Late Eocene to the early Oligocene (Ge et al., 2020; Ye, Mei, Shi, Shu et al., 2018; Ye et al., 2020; Zhu et al., 2016). The syn‐rift stratigraphic units associated with these two rifting phases are separated by three major horizons: the Tg, T80, and T70.…”

Section: Geological Settingmentioning

confidence: 99%

3‐D Structure and Development of a Metamorphic Core Complex in the Northern South China Sea Rifted Margin

梅

Da-peng

et al. 2022

JGR Solid Earth

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A metamorphic core complex (MCC) is a domed structure that results from the process of lithospheric extension and subsequent isostatic readjustment, during which process, the brittle upper crust breaks and is displaced along an extensional detachment fault, while ductile crustal materials (or even upper mantle) ascend from deeper levels and become exhumed in the footwall of the detachment fault (e.g., Brun et al., 2018;Ring, 2014;Whitney et al., 2013). The extensional detachment that bounds the MCC on its top typically displays a low-angle (<30°), domed morphology and soles into the deep ductile crustal layer, although it is usually considered to initiate within the brittle upper crust at steeper angles (e.g., Little et al., 2019;Mizera et al., 2019;Webber et al., 2020). The detachment fault finally places the upper crustal rocks and the low-grade or unmetamorphosed sedimentary sequences in the hanging-wall against the metamorphic or plutonic rocks exhumed from the brittle-ductile

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Section: Geological Settingmentioning

confidence: 99%

3‐D Structure and Development of a Metamorphic Core Complex in the Northern South China Sea Rifted Margin

梅

Da-peng

et al. 2022

JGR Solid Earth

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“…1(c)). Meanwhile, in the thermal subsidence stage, the Lufeng Depression experienced Baiyun tectonic movement and Dongsha tectonic movement with weakened tectonic intensity (Ge et al, 2020) (Fig. 1(c)).…”

Section: Geological Settingmentioning

confidence: 99%

Hydrocarbon dynamic ﬁeld division and its relevance to oil and gas exploration for Paleogene reservoir in Lufeng Depression

Pang

Zhang

et al. 2022

Adv. Geo-Energy Res.

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Significant breakthroughs have been achieved in the exploration of Paleogene reservoirs in the Lufeng Depression. However, as drilling depth is becoming greater, the discovered oil and gas reservoirs show signs of transition from conventional to unconventional accumulations, and the identification of conventional and unconventional reservoir boundaries is of particular significance. Herein, the hydrocarbon dynamic field boundaries in the Lufeng Depression are comprehensively identified by the geological drilling result method, the sandstone pore throat radius critical value discrimination method and the dry layer drilling rate variation method; then, the hydrocarbon dynamic field is divided and the characteristics and differences of hydrocarbon accumulations in each hydrocarbon dynamic field are compared. The results show that the buoyancy-driven hydrocarbon accumulation depth in the Lufeng Depression is between 3,500-4,000 m, and the hydrocarbon accumulation depth limit is about 5,800 m. The focus of research on Paleogene oil and gas exploration in the Lufeng Depression should be placed on conventional oil and gas reservoirs in the free dynamic field and tight oil reservoirs in the reformed dynamic field. As for the Enping Formation and Upper Wenchang Formation, efforts should concentrate on conventional oil and gas reservoir exploration, and the tight reservoir of Lower Wenchang Formation should be explored in the high fracture density area in C-4 and C-8 well blocks and the west of C-8 well block of the Lufeng 13 sag. The research results of this paper are of great value in further increasing oil and gas production and the explorarion of sreserves in the Lufeng Depression.

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“…The sediment thickness of the Enping and Wenchang Formations exceeds 4,500 m (Ge et al, 2020), of which the former can be subdivided into four subsections, and the latter can be subdivided into six subsections. These two formations experienced a complete set of sedimentary cycles.…”

Section: Location and Geological Settingmentioning

confidence: 99%

Criteria and favorable distribution area prediction of Paleogene effective sandstone reservoirs in the Lufeng Sag, Pearl River Mouth Basin

Wang

Chen

et al. 2022

Adv. Geo-Energy Res.

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As the focus of conventional oil and gas exploration is changing from shallow to deep layers, the identification of deep effective reservoirs is crucial to exploration and development. In this paper, based on the geological anatomy of oil and gas reservoirs, a new discriminatory criterion and evaluation method for effective reservoirs is proposed in combination with the analysis of reservoir formation dynamics mechanism. The results show that the hydrocarbon properties of the reservoir vary with the ratio of the capillary force between the sandstone reservoir and its surrounding rock. The effective reservoir is discriminated and the reservoir quality is evaluated based on the capillary force and depth of the surrounding media and the sandstone reservoir for adjacent plates. When the capillary force ratio is greater than 0.6, fewer effective reservoirs are developed. The effective reservoir is determined by the capillary force ratio of the sandstone reservoir and the surrounding rock medium to mechanically explain the geological phenomenon that low-porosity reservoirs can also accumulate hydrocarbons. Our findings have significant guiding value for Paleogene oil and gas exploration in the Zhu I depression of Pearl River Mouth Basin.

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Tectono-sedimentary signature of the second rift phase in multiphase rifts: A case study in the Lufeng Depression (38–33.9 Ma), Pearl River Mouth Basin, south China sea

Cited by 30 publications

References 51 publications

3‐D Structure and Development of a Metamorphic Core Complex in the Northern South China Sea Rifted Margin

3‐D Structure and Development of a Metamorphic Core Complex in the Northern South China Sea Rifted Margin

Hydrocarbon dynamic ﬁeld division and its relevance to oil and gas exploration for Paleogene reservoir in Lufeng Depression

Criteria and favorable distribution area prediction of Paleogene effective sandstone reservoirs in the Lufeng Sag, Pearl River Mouth Basin

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