Study on variously dolomitized reservoir reef at platform margin of Changxing Formation in northeastern Sichuan Basin, southwestern China

Li, Mintong; Lin, Xiubin; Tian, Jie; Peng, ShunFeng; Xu, Liang; Lin, Songyi

doi:10.1007/s13146-018-0429-y

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…The eruption of the Emeishan basalt primarily occurred between the Maokou and Wujiaping stages, resulting in a brief sedimentary hiatus and a shortened period of uplift and erosion for the Maokou Formation. The erosion of the Maokou Formation, along with the constraints imposed by the Wujiaping Formation, suggests that prior to the Emeishan basalt eruption, a rapid crustal uplift formed a significant dome uplift [7,9]. Consequently, the structural pattern of the Sichuan Basin exhibits higher elevations in the southwest and lower elevations in the northeast [10,26].…”

Section: Stratigraphy and Sedimentary Environmentmentioning

confidence: 99%

“…The southern and western regions of Sichuan primarily harbor natural gas reservoirs within the Middle Permian [6]. Currently, the focus of exploration lies in the domain of platform-edge reefs, predominantly situated on the eastern side of the Kaijiang-Liangping shelf, the western side of the Chengkou-E'xi deepwater shelf, and the peripheral zones of the central platform depression [7][8][9]. Platform shoals, including the Changxing Formation, Feixianguan Formation, and Jialingjiang Formation, are also under exploration [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Sedimentary Facies, Paleogeography, and Depositional Models of the Middle–Late Permian in the Sichuan Basin, Southwest China

Deng,

Zhao,

Lin

et al. 2023

Minerals

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This study focuses on the analysis of the sedimentary facies of the Middle–Late Permian, including the Qixia, Maokou, Wujiaoping/Longtan, and Changxing/Dalong Formations, in the Sichuan Basin, southwest China. Integrating drilling data and field outcrop data, various sedimentary facies indicators were employed to define eight sedimentary facies types in the Sichuan Basin during the Middle–Late Permian, namely, mixed tidal flat, tidal flat, restricted platform, open platform, platform margin, slope, basin, and volcanic facies. Detailed facies analysis was conducted on selected well logs, and sedimentary facies distribution maps were compiled for different time intervals, establishing depositional models. During the Qixia to Maokou stages, an extensive open platform was developed in the Sichuan Basin, accompanied by shallow intra-platform shoals. Towards the west along the Dayi–Ya’an line, platform margins were developed, followed by slope facies and basin facies in a northwest direction. During the Changxing stage, the Kaijiang–Liangping fault block subsided, forming the “Kaijiang-Liangping” paleochannel, which controls reef–shoal deposition in the region. This study provides comprehensive insights into the sedimentary facies characteristics and depositional environments of the Middle–Late Permian in the Sichuan Basin, contributing to the understanding of the regional sedimentary history and geological evolution.

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Section: Stratigraphy and Sedimentary Environmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sedimentary Facies, Paleogeography, and Depositional Models of the Middle–Late Permian in the Sichuan Basin, Southwest China

Deng,

Zhao,

Lin

et al. 2023

Minerals

Self Cite

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“…Although the dolomite reservoir in E 2 s is nearly 4000 m deep, its residual primary porosity is still greater than 30% [19]. Most dolomite reservoirs form in marine environments [20][21][22][23][24]; most are intercrystalline pore reservoirs that formed by dolomitization [25,26]; and some formed as karst caves or are related to hydrothermal solution and the thermochemical sulfate reduction (TSR) [27][28][29][30][31][32][33][34]. However, the reservoir space of the dolomite reservoir in E 2 s is largely composed of primary pores, residual primary pores, and moldic pores [19,35].…”

Section: Introductionmentioning

confidence: 99%

Carbon and Oxygen Isotopic Composition of Saline Lacustrine Dolomite Cements and Its Palaeoenvironmental Significance: A Case Study of Paleogene Shahejie Formation, Bohai Sea

Meng

Zhang

et al. 2018

Minerals

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The dolomite reservoirs in the Paleogene Shahejie Formation in the Bozhong area of the Bohai Bay Basin contain a large amount of dolomite cement. Petrologic and mineralogic studies have shown that the dolomite cements can be divided into three types according to their occurrence: coating dolomite (CD), pore-lining dolomite (LD), and pore-filling dolomite (FD). The laser microsampling technique was used to analyze the C and O isotopes in the carbonate minerals. This method is an effective way to produce CO2 gas from a particular carbonate structure in a thin section, and it has a spatial resolution of 20–50 µm and an optimal precision of approximately ±0.22σ for δ13C and δ18O in carbonate standard materials. The carbon and oxygen isotopic compositions and the oxygen isotopic geothermometer results showed that the dolomitization fluid is mainly low temperature fluid, the lake basin environment is relatively closed, and the salinity index Z value is greater than 120, which indicates the invasion of seawater. CD and early-stage LD crystals were mainly very fine crystals with faint cathodoluminescence, which indicates the early formation of diagenesis. The high temperatures of late-stage LD and FD measured by oxygen isotope thermometers indicates that they formed at a deeper depth. The dolomite cements in the study area may have formed in two stages: seepage-reflux dolomitization during the penecontemporaneous period and burial dolomitization.

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Paleoenvironmental and diagenetic evolution of the Aptian Pre-Salt succession in Namibe Basin (Onshore Angola)

Moragas

Baqués

Martín‐Martín

et al. 2023

Marine and Petroleum Geology

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Study on variously dolomitized reservoir reef at platform margin of Changxing Formation in northeastern Sichuan Basin, southwestern China

Cited by 3 publications

References 11 publications

Sedimentary Facies, Paleogeography, and Depositional Models of the Middle–Late Permian in the Sichuan Basin, Southwest China

Sedimentary Facies, Paleogeography, and Depositional Models of the Middle–Late Permian in the Sichuan Basin, Southwest China

Carbon and Oxygen Isotopic Composition of Saline Lacustrine Dolomite Cements and Its Palaeoenvironmental Significance: A Case Study of Paleogene Shahejie Formation, Bohai Sea

Paleoenvironmental and diagenetic evolution of the Aptian Pre-Salt succession in Namibe Basin (Onshore Angola)

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