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Sedimentary characteristics of lacustrine deep-water gravity flow in the third member of Paleogene Shahejie Formation in Dongying Sag,Bohai Bay Basin,China

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Frontiers of Earth Science 2023年第2期17卷 487-504页

作者： Yuanpei ZHANG Chuanhua LI Xuecai ZHANG Xuqing FANG Yong WANG Jinliang ZHANG Jun XIE Jinkai WANG College of Earth Science and Engineering Shandong University of Science and TechnologyQingdao 266590China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China Sinopec Shengli Oilfield Co. Dongying 257000China Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China

Many types of sedimentary systems occur in the middle of the third member of the Shahejie Formation(E_(2)S_(3)^(2))of the Paleogene in the Dongying Sag east of the Bohai Bay Basin.Due to the topography and material supply,traction and gravity flow depositions are intertwined in this area,and the sand body types are complex and diverse,making it challenging to improve the accuracy of their description and prediction and restricting oil reservoir exploration and development.Therefore,this paper documents our systematic study of the sedimentary characteristics of the southern slope of Dongying Depression,the formation mechanism of different sand body types,and the prediction of sand body distribution.First,according to the coring well’s single-well facies and vertical rock sequence,nine single lithofacies types and five lithofacies association types were identified.Combined with the well logging facies marks of all wells,the depositional models of delta and gravity flow depositional systems were established in the study area.Then,the gravity flow was divided into slip,collapse,debris flow,and turbidity flow according to its development mechanism.Finally,the distribution law of the gravity flow sedimentary facies type was predicted.gravity flow sliding deposits are primarily distributed near the delta front,slump and clastic flow deposits are distributed near the far slope,and turbidity current deposits are distributed at the far slope.With the gradual shrinkage of the water body in the north-west direction and the continuous advancement of the river delta,the gravity flow sand body gradually disappears in the late E_(2)S_(3)^(2) and transits to delta plain deposition.

关键词： Dongying Sag gravity flow sedimentary characteristics Bohai Bay Basin

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gravity flow on Slope and Abyssal Systems in the Qiongdongnan Basin,Northern South China Sea

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Acta Geologica Sinica(English Edition) 2011年第1期85卷 243-253页

作者： SU Ming XIE Xinong LI Junliang JIANG Tao ZHANG Cheng HE Yunlong TIAN Shanshan ZHANG Cuimei Key Laboratory of Tectonics and Petroleum Resources （China University of Geosciences） Ministry of Education Wuhan 430074 China CAS Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Department of Technology Zhanjiang Branch of CNOOC Zhanjiang 524057 China

The study of new seismic data permits the identification of sediment gravity flows in terms of internal architecture and the distribution on shelf and abyssal setting in the Qiongdongnan Basin （QDNB）. Six gravity flow types are recognized：（1） turbidite channels with a truncational basal and concordant overburden relationship along the shelf edge and slope, comprising laterally-shifting and vertically-aggrading channel complexes; （2） slides with a spoon-shaped morphology slip steps on the shelf-break and generated from the deformation of poorly-consolidated and high water content sediments; （3） slumps are limited on the shelf slope, triggered either by an anomalous slope gradient or by fault activity; （4） turbidite sheet complexes （TSC） were ascribed to the basin-floor fan and slope fan origin, occasionally feeding the deep marine deposits by turbidity currents; （5） sediment waves occurring in the lower slope-basin floor, and covering an area of approximately 400 km2, were generated beneath currents flowing across the sea bed; and （6） the central canyon in the deep water area represents an exceptive type of gravity flow composed of an association of debris flow, turbidite channels, and TSC. It presents planar multisegment and vertical multiphase characteristics. Turbidite associated with good petrophysical property in the canyon could be treated as a potential exploration target in the QDNB.

关键词： gravity flow slope and abyssal system Qiongdongnan Basin South China Sea

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Sedimentary Characteristics and Model of gravity flow Depositional System for the First Member of Upper Miocene Huangliu Formation in Dongfang Area, Yinggehai Basin, Northwestern South China Sea

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Journal of Earth Science 2014年第3期25卷 506-518页

作者： Ming Sun Hua Wang Jihua Liao Huajun Gan Jun Xiao Jinfeng Ren Shu'e Zhao Key Laboratory of Tectonics and Petroleum Resources Ministry of Education China University of Geosciences Guangzhou Marine Geological Survey Faculty of Earth Resources China University of Geosciences CNOOC Research Institute

The gravity flow deposit were mainly developed in the lowstand systems tract（LST） of the first member of Upper Miocene Huangliu Formation（Ehl1） in Dongfang area, Yinggehai Basin, has become a valuable target for gas exploration and production. The gravity flow sedimentary characteristics of lithofacies associations, sedimentary texture, seismic facies and logging facies were described in detail on the basis of integrated analysis of cores, logging and seismic data. The sedimentary microfacies types composed of neritic sandbar, continental shelf mud, main channel, bifurcated or cross-cutting distributary channel, overspill, and natural levee are revealed under the constraint of high resolution sequence stratigraphic framework in the Ehl1. The gravity flow deposit system in the LST is divided into three evolution stages corresponding to periods of three parasequence sets. The gravity flow deposit was induced in the early LST, expanded rapidly in the middle LST and decreased slightly in the late LST. But its developing scale decreased sharply in the transgression systems tract（TST） and finally vanished in the highstand systems tract（HST）. This spatial evolution rule is constrained by the integrated function of sediments supply of the Vietnam Blue River in the LST, the development of local gradient change in sea floor（micro-topography, i.e., flexure slope break）, and the fall in relative sea level. On the basics of the deep study of the coupling relationship among the three main control factors, the sedimentary model is established as an optimal component of ＂source-channel-sink＂ for shallow marine turbidite submarine fan.

关键词： Yinggehai Basin Dongfang area the first member of Upper Miocene Huangliu Formation（Ehl1） sedimentation characteristics gravity flow sedimentary model.

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Origin of submarine canyon-channel systems along the middle segment of West Mariana Ridge,Philippine Sea

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Journal of Oceanology and Limnology 2023年第3期41卷 881-896页

作者： Guangxu ZHANG Shuang LI Wei LI Xiujuan WANG Duanxin CHEN Dongdong DONG Wenlong WANG Key Laboratory of Marine Geology and Environment&Center for Ocean Mega-Science Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources National Laboratory for Marine Science and TechnologyQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China CAS Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Lab of Submarine Geosciences and Prospecting TechniquesMOE and College of Marine GeosciencesOcean University of ChinaQingdao 266100China

Submarine canyon-channel systems have been documented in the Parece Vela Basin,West Mariana Ridge;however,the mechanism of the formation and controlling factors remain poorly understood.Based on high-resolution multibeam bathymetric data and two-dimensional(2D)seismic profiles,we identified and mapped the submarine canyon-channel system along the middle segment of West Mariana Ridge in the Philippine Sea.These submarine canyon-channels show a main W-E orientation at depth of 2000–4500 m.They are approximately 72–128 km in length and 1.3–15 km in width,and their canyon heads are adjacent to the seamounts with several branches.The upper reaches of submarine canyon-channels are characterized by deeply incised,narrow,V-shaped thalwegs,suggesting the powerful erosion of gravity flows.The distinguished sediment waves are suggested to be resulted from the interaction of turbidity currents and seafloor.Our observations demonstrate that gravity flows originated from the collapses of seamount flanks plays a vital role in developing the submarine canyonchannel system along the West Mariana Ridge.This work provides better understanding of erosion,transport,and deposition of sediments from subducting ridges to deep-water basins,and also new insights into the origin and evolution of submarine canyon-channel systems along subducting ridges.

关键词： submarine canyon-channel system gravity flow subducting ridges West Mariana Ridge

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Types,characteristics and geological significance of event deposits of Chang 9 Member of Triassic Yanchang Formation in southwestern Ordos Basin,NW China

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Petroleum Exploration and Development 2023年第3期50卷 588-602页

作者： WANG Ziye MAO Zhiguo YUAN Xuanjun DENG Xiuqin HUI Xiao ZHANG Zhongyi CUI Jingweil PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China National Energy Tight Oil&Gas Research&Development Center Beijing 100083China Key Laboratory of Oil and Gas Reservoir CNPCBeijing 100083China Research Institute of Exploration and Development PetroChina Changqing Oilfield CompanyXi'an 710018China

Through core observation,thin section identification,and logging and testing data analysis,the types and characteristics of event deposits in the ninth member of Yanchang Formation of Triassic(Chang 9 Member)in southwestern Ordos Basin,China,are examined.There are 4 types and 9 subtypes of event deposits,i.***.earthquake,gravity flow,volcanic and anoxic deposits,in the Chang 9 Member in the study area.Based on the analysis of the characteristics and distribution of such events deposits,it is proposed that the event deposits are generally symbiotic or associated,with intrinsic genetic relations and distribution laws.Five kinds of sedimentary microfacies with relatively developed event deposits are identified,and the genetic model of event deposits is discussed.Seismites are mainly developed in the lake transgression stage when the basin expands episodically,and commonly affected by liquefaction flow,gravity action and brittle shear deformation.gravity flow,mainly distributed in the high water level period,sandwiched in the fine-grained sediments of prodelta or semi-deep lake,or creates banded or lobate slump turbidite fan.It is relatively developed above the seismites strata.The volcanic event deposits are only seen in the lower part of the Chang 9 Member,showing abrupt contact at the top and bottom,which reflects the volcanic activity at the same time.Anoxic deposits are mostly formed in the late stage of lake transgression to the highstand stage.Very thick organic-rich shales are developed in the highstand stage of Chang 9 Member,and the event deposits in the depositional period of these shales are conducive to potential reservoirs.

关键词： event deposit seismite gravity flow anoxic event Triassic Yanchang Formation Ordos Basin

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Diversity of depositional architecture and sandbody distribution of sublacustrine fans during forced regression: A case study of Paleogene Middle Sha 3 Member in Dongying Sag, Bohai Bay Basin, East China

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石油勘探与开发:英文版 2023年第4期50卷 894-908页

作者： WU Qianran XIAN Benzhong GAO Xianzhi TIAN Rongheng ZHANG Haozhe LIU Jianping GAO Yukun WANG Pengyu State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China College of Geosciences China University of Petroleum(Beijing)Beijing 102249China School of Petroleum Engineering Chongqing University of Science and TechnologyChongqing 401331China

Currently, the differences in gravity flow deposits within different systems tracts in continental lacustrine basins are not clear. Taking the middle submember of the third member of Paleogene Shahejie Formation(Sha 3 Member) in the Shishen 100 area of the Dongying Sag in the Bohai Bay Basin as an example, the depositional architecture of sublacustrine fans during forced regression and the impact of the fourth-order base-level changes on their growth were investigated using cores, well logs and 3D seismic data. Sublacustrine fans were mainly caused by hyperpycnal flow during the fourth-order base-level rise, while the proportion of slump-induced sublacustrine fans gradually increased during the late fourth-order base-level fall. From rising to falling of the fourth-order base-level, the extension distance of channels inside hyperpycnal-fed sublacustrine fans reduced progressively, resulting in the transformation in their morphology from a significantly channelized fan to a skirt-like fan. Furthermore, the depositional architecture of distributary channel complexes in sublacustrine fans changed from vertical aggradation to lateral migration, and the lateral size of individual channel steadily decreased. The lobe complex's architectural patterns evolved from compensational stacking of lateral migration to aggradational stacking, and the lateral size of individual lobe steadily grew. This study deepens the understanding of depositional features of gravity flow in high-frequency sequence stratigraphy and provides a geological foundation for the fine development of sublacustrine fan reservoirs.

关键词： Bohai Bay Basin Dongying Sag Paleogene Shahejie Formation sublacustrine fan hyperpycnal flow gravity flow base-level depositional architecture

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Mass transport deposits and processes in the north slope of the Xisha Trough,northern South China Sea

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Acta Oceanologica Sinica 2015年第9期34卷 117-125页

作者： QIN Zhiliang WU Shiguo WANG Dawei LI Wei GONG Shaojun MI Lijun SPENCE George Tianjin Research Institute for Water Transport Engineering Ministry of Transport Laboratory of Marine Geophysics and Deep Sea Georesource Sanya Institute of Deep-sea Science and EngineeringChinese Academy of Sciences Tianjin Exploration Center of Marine Geology Department of Exploration China National Offshore Oil Corporation School Earth & Ocean Sciences University of Victoria

Triple mass-transport deposits （MTDs） with areas of 625, 494 and 902 km^2, respectively, have been identified on the north slope of the Xisha Trough, northern South China Sea margin. Based on high-resolution seismic reflection data and multi-beam bathymetric data, the Quaternary MTDs are characterized by typical geometric shapes and internal structures. Results of slope analysis showed that they are developed in a steep slope ranging from 5° to 35°. The head wall scarps of the MTDs arrived to 50 km in length （from headwall to termination）. Their inner structures include well developed basal shear surface, growth faults, stepping lateral scarps, erosion grooves, and frontal thrust deformation. From seismic images, the central deepwater channel system of the Xisha Trough has been filled by interbedded channel-levee deposits and thick MTDs. Therefore, we inferred that the MTDs in the deepwater channel system could be dominated by far-travelled slope failure deposits even though there are local collapses of the trough walls. And then, we drew the two-dimensional process model and three- dimensional structure model diagram af the MTDs. Combined with the regional geological setting and previous studies, we discussed the trigger mechanisms of the triple MTDs.

关键词： South China Sea mass transport deposits submarine slides gravity flow deepwater channel system

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Episodic Carbonate Deposits on the Triassic Continental Slope in Southern China

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Acta Geologica Sinica(English Edition) 1999年第1期73卷 93-103,129页

作者： Bao Zhidong Department of Geosciences,University of Petroleum,Changping District, Beijing,102200 Univ Petr Dept Geosci Beijing 102200 Peoples R China

Abstract Episodic carbonate deposits on the Triassic continental slope in southern China are mainly composed of gravity-flow limestones and contourite limestones. gravity-flow limestones were well developed in the lower and middle Yangtze area in the Early Triassic and in the Yunnan-Guizhou-Guangxi area in the Early and Middle Triassic. Five fundamental types of gravity-flow limestones are recognized: slide limestone, debris-flow limestone, grain-flow limestone, turbidite limestone and rockfall limestone. They form six types of assemblage beds: slide-debris-flow limestones, slide-debris-flow-turbidite limestone, slide-debris-flow-grain-flow-turbidite limestone, rockfall-debris-flow limestone, debris-flow-turbidite limestone, and debris-flow-grain-flow-turbidite limestone. The first two were formed mainly in the Early Triassic slopes. The Middle Triassic slopes were characterized by widespread rockfall limestone. Growth faults, storms, earthquakes and oversteepened slopes are considered to be the probable triggers of the gravity flows.

关键词： continental slope episodic deposition gravity flow contour current Triassic southern China

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A flow chemiluminescence paper-based microfuidic device for detection of chromium(Ⅲ)in water

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Journal of Innovative Optical Health Sciences 2019年第6期 56-71页

作者： Qiuping Shang Peng Zhang Huijie Li Rui Liu Chunsun Zhang MOE Key Laboratory of Laser Life Science&Institute of Laser Life Science College of Biophotonics South China Normal University Guangzhou 510631P.R.China

In this work,a solely gravity and capillary force-driven flow chemiluminescence(GCF-CL)paper-based microfuidic device has been proved for the first time as a new platforn for inex-pensive,usable,mini mally instrumented dynamic chemiluninescence(CL)detection of chromium(Ⅲ)[Cr(Ⅲ)],where an appropriate angle of inclination between the loading and detection zones on the paper produces a rapid flow of CL prompt solution through the paper charnel.For this study,we use a cost-effective paper device that is manufactured by a simple wax screen-printing method,while the signal generated from the Cr(Ⅲ)-catalyzed oxidation of luminol by H_(2)O_(2) is recorded by a low-cost and luggable CCD camera.A series of GCF-CL affecting factors have been evaluated carefully.At optimal conditions,two linear relationships between GCF-CL intensities and the logarithms of Cr(Ⅲ)concentrations are obtained in the concentration mnges of 0.025-35 mg/L and 50-500 mg/L separately,with the detection limit of 0.0245mg/L for a les than 30s assay,and relative standard deviations(RSDs)of 38%,4.5%and 2.3%for 0.75,5 and 50 mg/L of Cr(Ⅲ)(n=8).The above results indicate that the GCF-CL paper-based microfluidic device possesses a receivable sensitivity,dynamic range,storage stability and reproducibility.Finally,the developed GCF-CL is utilized for Cr(Ⅲ)detection in real water samples.

关键词： Paper-based microfuidics gravity flow cherniluminescence capillary flow wax screen-printing detection of chromium(Ⅲ)

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