Tectonic Evolution and Sequence Filling of Paleocene in Lishui Sag, East China Sea Shelf Basin

Liu, Jin Shui; Zhang, Ming; Zhang, Jin Liang; Wang, Chun Yan; Zhang, Peng Hui

doi:10.4028/www.scientific.net/amr.807-809.2244

Cited by 9 publications

(5 citation statements)

References 3 publications

(3 reference statements)

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“…Lishui Sag is located in the southwest edge of the East China Sea shelf basin, the west and south of which is the NNE-trending Minzhe Uplift structural belt, the east is the Yandang Ridge, and the north is adjacent to the Jiaojiang Sag, with a total area of 13,785 km 2 , and a general trend of the NNE [20,[29][30][31]. The geological structure of the Lishui West Sag is characterized by an eastern fault and a western overlap, with a relatively gentle slope at the western edge of the basin.…”

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

“…Overall, the Lishui Sag is divided into two subsags, east and west, separated by the Lingfeng Ridge of the central buried hill drape structural belt. Further division allows the Lishui Sag to be classified into five sub-structural units: Lishui West Sag, Lishui East Sag, Lishui South Sag, Lingfeng Ridge, and Lishui South Ridge [18][19][20]27,29,32] (Figure 1B). The Lishui West Sag is the main sag of the Lishui Sag, with an area of approximately 15,000 km 2 and a maximum sedimentary thickness of up to 12,000 m. The subsidence center of the Lishui Sag is mainly located on the descending plate of the Lingfeng Fault in the eastern part of the Lishui West Sag, and the sedimentary thickness of the Lishui Sag is controlled by the segmented activity of the Lingfeng Fault, with uneven filling characteristics (Figure 1C).…”

Section: Geological Settingmentioning

confidence: 99%

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Quantitative Evaluation of Paleocene Reservoir Diagenetic Facies by Logging in Lishui West Sag, East China Sea Basin

Teng,

Fu,

Qin

et al. 2023

Minerals

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Exploration in the Lishui West Sag of the East China Sea Basin is limited by the scarcity of offshore drilling sites, and the prediction of deep, high-quality reservoirs is challenging using only geophysical methods. This study introduces a quantitative approach to diagenetic facies division in individual wells based on logging data, providing a new method and perspective for the prediction of deep, high-quality reservoirs. We employed comprehensive data from core, logging, thin-section casting, cathodoluminescence, scanning electron microscopy, and X-ray diffraction analyses from five wells to study the petrology, physical properties, diagenetic types and strength, and diagenetic minerals of the Paleocene sandstone reservoirs in the Lishui West Sag. Apparent compaction rate, apparent cementation rate, and other quantitative characterization parameters were used to calculate the comprehensive diagenetic coefficient (Cg), and the diagenetic facies were divided into compaction, cementation, and dissolution facies. A logging calculation model for the comprehensive diagenetic coefficient (Cg) and a quantitative identification method for diagenetic facies in individual well reservoirs were established through a fitting analysis between Cg and logging curve parameters. Continuous quantitative identification of vertical diagenetic facies in the five wells in the study area showed that the high-quality reservoirs in wells L1, L2, and L3 within the L1 gas field are characterized by extensive development of dissolution facies, while wells L4 and L5 are dominated by compaction and cementation facies, with poor reservoir properties and no industrial gas flow output. The results demonstrate the reliability of the model method. The establishment of this quantitative characterization method for diagenetic facies using logging data provides guidance for the prediction of favorable reservoirs.

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Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

See 1 more Smart Citation

Quantitative Evaluation of Paleocene Reservoir Diagenetic Facies by Logging in Lishui West Sag, East China Sea Basin

Teng,

Fu,

Qin

et al. 2023

Minerals

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“…Local islands such as Diaoyu Island are exposed to the sea level. The Okinawa Trough is a young postarc rift basin in the tensional (expansion) stage, with intense fault activity and intrusion of magmatic rocks in the trough [25][26][27].…”

Section: Study Area Overviewmentioning

confidence: 99%

Analysis of Engineering and Geological Conditions of International Submarine Optical Fiber Cable Routing in the East China Sea Section

Zhang

Fan

Nan³

et al. 2022

Geofluids

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The East China Sea section of the Chinese international submarine optical fiber cable generally starts from the Shanghai coast, crosses the East China Sea shelf and continental slope to the east, and intersects with the international optical fiber cable system in Okinawa Trough. In this paper, the regional tectonic, seismic, and other environmental conditions of the East China Sea section of the international submarine optical cable are briefly described based on the previous data. Additionally, the geological engineering conditions of the international optical cable routing in the East China Sea area will be analyzed based on the field investigation data such as multibeam, side-scan sonar, shallow stratigraphic profile, sediment sampling, and cone penetration test (CPT). It is found that the main geological factors in the East China Sea shelf area are submarine scouring, sandwave, shallow gas, and hard seabed; in the land slope area are steep slope, submarine valley, rock, landslide, and shallow gas (pockmark); and in the Okinawa Trough area are gully, sea mound/seamount, rock, shallow gas, fault, and hard strata outcrop. This paper briefly analyzes the impact of each geological disaster factor on the submarine cable project and proposes solutions for providing essential information and some scientific basis for designing, constructing, operating, and maintaining international submarine optical fiber cables in the East China Sea area.

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“…The Lishui Sag has low petroleum discovery due to the lithologic complexity of its potential reservoirs. Numerous studies on the source rock and reservoir have been performed in the Lishui Sag, mainly focused on the tectonic evolution and hydrocarbon-forming processes [3][4][5][6][7][8][9]. The main hydrocarbon generation period occurred during the Late Paleocene [7,10].…”

Section: Introductionmentioning

confidence: 99%

3D-Basin Modelling of the Lishui Sag: Research of Hydrocarbon Potential, Petroleum Generation and Migration

Zhang

Guo

Liu³

et al. 2019

Energies

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The Lishui Sag is located in the southeastern part of the Taibei Depression, in the East China Sea basin, where the sag is the major hydrocarbon accumulation zone. A three dimensional modelling approach was used to estimate the mass of petroleum generation and accumulated during the evolution of the basin. Calibration of the model, based on measured maturity (vitrinite reflectance) and borehole temperatures, took into consideration two main periods of erosion events: a late Cretaceous to early Paleocene event, and an Oligocene erosion event. The maturation histories of the main source rock formations were reconstructed and show that the peak maturities have been reached in the west central part of the basin. Our study included source rock analysis, measurement of fluid inclusion homogenization temperatures, and basin history modelling to define the source rock properties, the thermal evolution and hydrocarbon generation history, and possible hydrocarbon accumulation processes in the Lishui Sag. The study found that the main hydrocarbon source for the Lishui Sag are argillaceous source rocks in the Yueguifeng Formation. The hydrocarbon generation period lasted from 58 Ma to 32 Ma. The first period of hydrocarbon accumulation lasted from 51.8 Ma to 32 Ma, and the second period lasted from 23 Ma to the present. The accumulation zones mainly located in the structural high and lithologic-fault screened reservoir filling with the hydrocarbon migrated from the deep sag in the south west direction.

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Tectonic Evolution and Sequence Filling of Paleocene in Lishui Sag, East China Sea Shelf Basin

Cited by 9 publications

References 3 publications

Quantitative Evaluation of Paleocene Reservoir Diagenetic Facies by Logging in Lishui West Sag, East China Sea Basin

Quantitative Evaluation of Paleocene Reservoir Diagenetic Facies by Logging in Lishui West Sag, East China Sea Basin

Analysis of Engineering and Geological Conditions of International Submarine Optical Fiber Cable Routing in the East China Sea Section

3D-Basin Modelling of the Lishui Sag: Research of Hydrocarbon Potential, Petroleum Generation and Migration

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