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Control of slope-pattern on the deposition of fan-delta systems:a case study of the Upper Karamay Formation,Junggar Basin

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Frontiers of Earth Science 2024年第2期18卷 384-399页

作者： Mingxuan GAO xinghe yu Shunli LI Wenmiao ZHANG Songhao HU Menglu ZHANG School of Energy Resource China University of GeosciencesBeijing 100083China Key laboratory of marine reservoir evolution and hydrocarbon enrichment mechanism(Ministry of Education) China University of GeosciencesBeijing 100083China College of Geosciences China University of PetroleumBeijing 102249China No.1 Oil Production Plant Xinjang Oilfield CompanyKaramay 834099China

The Mesozoic fan deltas in the north-west margin of the Junggar Basin,as important petroleum reservoirs,exhibited complex facies change and internal structures with strong heterogeneity which were controlled by the transformation of slope-patterns,bringing great challenges to the study of sedimentary *** Upper Karamay Formation at north-west margin of the Junggar Basin was the objective in this paper which attempts to clarify the mechanism of sedimentary response and sand-body distribution of fan delta systems under the control of slope-pattern *** on a data set of cores,well logs and seismic,two types of slope-pattern were identified in the study area,which include steep-to-gentle in the south and gentle-to-steep in the *** control of difference slope-patterns on the sand-body distribution was clarified based on the analysis of the sedimentary dynamics,facies characteristics,and depositional evolution of the fan *** study shows that the transport mechanism of sediments on the steep-slope was dominated by debris flows,developing coarse-grained,thick-bedded lobes with poor structural maturity of *** the gentle-slope,the deposition was dominated by hyperconcentrated-traction currents,forming relatively fine-grained,thin-bedded lobes with increased sandy *** sand-bodies show frequent bar-channel transformation and channel down-cutting under the steep slope setting,which exhibit migration of isolated river channels on the gentle *** the steep-to-gentle pattern,the coase-grained sediments were mainly accumulated at slope toe,generally developed equiaxial ***,the coarse-grained clasts were preserved both at proximal and distal lobes on the gentle-to-steep slopes,showing obvious lateral extension of the fan *** slope patterns controlled sedimentary respond rates of the fan deltas during lake level *** comparing the modern cases of fan systems worldwide,the control of slope patterns on deposit

关键词： fan delta slope-pattern sedimentary characteristics the Upper Karamay Formation

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扇三角洲流体类型转换及控制因素分析——以青海希里沟扇三角洲为例

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沉积学报 2024年第2期42卷 643-660页

作者：冯烁李顺利于兴河付超高明轩刘倩中国地质大学(北京)能源学院北京100083 中海油研究总院北京100028

【目的】扇三角洲广泛发育于沉积盆地边缘及内部,具有规模庞大、类型多样、生储盖配置良好等特点,蕴藏着巨大的油气资源勘探潜力。然而,其流体类型转换和控制因素、沉积过程与特征仍尚不清晰。【方法】以青海希里沟扇三角洲为研究对象,... 详细信息

【目的】扇三角洲广泛发育于沉积盆地边缘及内部,具有规模庞大、类型多样、生储盖配置良好等特点,蕴藏着巨大的油气资源勘探潜力。然而,其流体类型转换和控制因素、沉积过程与特征仍尚不清晰。【方法】以青海希里沟扇三角洲为研究对象,基于野外露头和探槽剖面的精细刻画描述,综合利用14C测年、粒度分析等方法,对希里沟扇三角洲不同时期沉积物粒度、结构、沉积构造等方面特征进行研究。【结果与结论】通过野外露头探槽剖面的精细刻画描述共划分出9类岩相及7种垂向组合序列,识别出碎屑流、片状洪流和牵引流共3种流体类型。根据AMS14C定年标定沉积界面、沉积物粒度、结构等方面特征,将希里沟湖三角洲划分为SI、SII和SIII共3个阶段,其中SI期为碎屑流粗粒沉积期,SII为片状洪流改造沉积期,SIII期为牵引流改造沉积期。通过沉积物粒度敏感组分分析,在希里沟湖扇三角洲平面识别出3期朵叶。结合希里沟三角洲沉积地形坡度和青海湖15 ka以来孢粉浓度变化,证实了希里沟扇三角洲流体类型转换受控于沉积坡度与气候的变化,明确了扇三角洲上平原以碎屑流主导,发育碎屑流主水道、片状洪流沉积为主要的构型单元,扇三角洲下平原以片状洪流主导,发育以辫状水道、辫流坝以及洪漫沉积为主要的构型单元,扇三角洲前缘以牵引流主导,发育以水下分流河道、河口坝以及席状砂为主要的构型单元。

关键词：扇三角洲沉积过程流体类型气候变化控制因素

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Sedimentary Microfacies and Porosity Modeling of Deep-Water Sandy Debris Flows by Combining Sedimentary Patterns with Seismic Data： An Example from Unit I of Gas Field A, South China Sea

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Acta Geologica Sinica(English Edition) 2016年第1期90卷 182-194页

作者： LI Shengli yu xinghe JIN Jianli The Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism Ministry of EducationChinaSchool of Energy ResourcesChina University of Geosciences(Beijing)Beijing 100083China

Sandy debris flow deposits are present in Unit I during Miocene of Gas Field A in the Baiyun Depression of the South China Sea. The paucity of well data and the great variability of the sedimentary microfacies make it difficult to identify and predict the distribution patterns of the main gas reservoir, and have seriously hindered further exploration and development of the gas field. Therefore, making full use of the available seismic data is extremely important for predicting the spatial distribution of sedimentary microfacies when constructing three-dimensional reservoir models. A suitable reservoir modeling strategy or workflow controlled by sedimentary microfacies and seismic data has been developed. Five types of seismic attributes were selected to correlate with the sand percentage, and the root mean square （RMS） amplitude performed the best. The relation between the RMS amplitude and the sand percentage was used to construct a reservoir sand distribution map. Three types of main sedimentary microfacies were identified： debris channels, fan lobes, and natural levees. Using constraints from the sedimentary microfacies boundaries, a sedimentary microfacies model was constructed using the sequential indicator and assigned value simulation methods. Finally, reservoir models of physical properties for sandy debris flow deposits controlled by sedimentary microfacies and seismic inversion data were established. Property cutoff values were adopted because the sedimentary microfacies and the reservoir properties from well-logging interpretation are intrinsically different. Selection of appropriate reservoir property cutoffs is a key step in reservoir modeling when using simulation methods based on sedimentary microfacies control. When the abnormal data are truncated and the reservoir properties probability distribution fits a normal distribution, microfacies-controlled reservoir property models are more reliable than those obtained from the sequence Gauss simulation me

关键词： sandy debris flow deposit seismic attribute and inversion geological modeling controlled by micro-facies data truncated process

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Strata Architectural Variability and Facies Distribution in a Structural Transfer Zone: A Case Study of Fushan Sag, Northern South China Sea

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Acta Geologica Sinica(English Edition) 2021年第6期95卷 1998-2015页

作者： FU Chao yu xinghe CHEN Weitong REN Guiyuan LIU Desheng School of Energy China University of Geosciences(Beijing)Beijing 100083China Geosciences Rennes Universitede Rennes 1Rennes 35042France CNOOC Research Institute Beijing 100028China South Oil Exploration and Development Company PetroChinaGuangzhou 510640China

Structural transfer zones in a half-graben rift basin play a significant role in controlling sandy sediments and providing a target for hydrocarbon exploration. Previous studies have classified the transfer zone in lacustrine environments into two different patterns: synthetic approaching transfer zones and synthetic overlapping transfer zones. However, the evolution of the depositional pattern and the controlling factors of the above transfer zones are still unclear. In the Fushan Sag, the northern South China Sea, an overlapping transfer zone developed in the early Eocene Epoch, while a synthetic approaching transfer zone developed in the late Eocene, due to tectonic uplift. This evolutionary process provided an opportunity to study the stacking pattern of strata architectural variability and facies distribution in the structural transfer zone of the Eocene lacustrine basin. In this study, following the indications of the oriented sedimentary structures in core samples and heavy mineral assemblages of 18 wells, the evolution of the paleo-hydrodynamic distribution during the early and late Eocene has been reconstructed. The sequence-stratigraphy was then divided and the sand body parameters calculated, according to the seismic data and well log interpretations. During the early Eocene, the lake level was at a low stand, the faults broken displacement in the East block being over 50 m. The prograding delta and turbidites are oriented perpendicular to the structural transfer zone. According to the quantitative analysis of the flow rate and the depositional parameters, we speculate that gravity transportation of the sediment and the sediment-supply are the dominating factors during this period. Up to the late Eocene, the rising lake level and the decreased fault displacement leads the flow to divert to a NE-direction, resulting in it being parallel to the axis of the transfer zone. Thus, we speculate that the accommodation space is predominant in this period. In compa

关键词： strata architectural variability facies distribution synthetic approaching transfer zone overlapping transfer zone evolutionary pattern Beibuwan Basin

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Evolution model of a modern delta fed by a seasonal river in Daihai Lake,North China:determined from groundpenetrating radar and trenches

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Frontiers of Earth Science 2019年第2期13卷 262-276页

作者： Beibei LIU Chengpeng TAN xinghe yu Xin SHAN Shunli LI College of Geosciences China University of PetroleumBeijing 102249China School of Geoscience and Technology Southwest Petroleum UniversityChengdu 610500China Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyState Oceanic AdministrationQingdao 266061China School of Energy Resources China University of Geosciences (Beijing)Beijing 100083China

While deltas fed by seasonal rivers are common in modem sedimentary environments,their characteristics remain unclear as compared to those fed by perennial *** study identifies a small delta discharged by a seasonal stream flowing into Daihai Lake,in northern China,which is driven by ephemeral and high-energy flood *** 3D facies architecture was analyzed using ground-penetrating radar (GPR) and sedimentary logs from outcrop and *** types of radar surfaces,including truncations of underlying inclined strata,weak reflections,and depositional surface of downlap and onlap,were *** radar facies (highangle obliquetangential,low-angle subparallel,gently plane parallel,plane-parallel,chaotic,and continuous strong reflection) were identified based on distinctive reflections,including amplitude,continuity,dip,and termination *** depositional units (Unit A to E) were documented from proximal to distal *** discharge signatures include significant grain-size decrease over short distance,abundant Froude supercritical flow sedimentary structures,poorly developed barforms,and small-scale scour and fill *** of lake-level and sediment budget were evaluated over the past 60 *** highstand stage (1960- 1980),amalgamated channel (Units A and B),and delta front (Unit C) were *** slope stage (1980-1996),the lower deposits (Units A,B,C) were eroded by Unit D with a distinct truncation *** lowstand stage,most eroded sediments bypassed the incised channel and accumulated in the distal part,in which a new depositional unit was formed (Unit E).The model demonstrates that deltas fed by seasonal rivers tend to accumulate large amounts of sediments carried by high magnitude floods within short periods.

关键词： delta evolution seasonal discharge ground-penetrating radar sedimentary architecture Daihai Lake

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Sedimentary characteristics comparison and genesis analysis of the deepwater channel in the hydrate enrichment zones on the north slope of the South China Sea

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Acta Oceanologica Sinica 2019年第3期38卷 103-113页

作者： Chao Fu xinghe yu Yiis Dong yulin He Jinqiang Liang Zenggui Kuang School of Energy Resources China University of Geosciences Institute of Geology and Geophysics Chinese Academy of Sciences Guangzhou Marine Geological Survey Ministry of Land and Nature Resource

Natural gas hydrate(NGH) is one of the important clean energy at present and even in the future. The study of its sedimentary environment and minerogenetic condition has long been a hot issue that has received much concern from geologists all over the world. China has successfully obtained the samples of NGH in Shenhu and Dongsha sea areas in 2007, 2013 and 2015, respectively. From this, the continental slope north of the South China Sea becomes an important test site for the study of NGH sedimentary genesis and minerogenetic condition. NGH has been found in Shenhu, Dongsha and Qiongdongnan areas within the continental slope north of South China Sea,at different depths of water, with different sedimentary characteristics, gas genesis, and minerogenetic *** a seismic sedimentology theory, combining seismic facies results of each facies, sedimentary facies and evolution of each area are documented in turn establishing a sedimentary model by considering palaeogeomorphology, sea level change and tectonic movement. The channel system and MTD(Mass Transport Deposition) system among these three areas were compared focusing on the developing position, appearance and controlling factors. Relative location among three areas is firstly defined that Dongsha area in a nearprovenance steep upper slope, Shenhu area in a normal gentle slope and Qiongdongnan area in an awayprovenance flat plain. Besides, their channel systems are classified into erosional, erosional-aggradational and aggradational channel, and MTD systems into headwall domain, translational domain and toe domain.

关键词： sedimentary characteristics deep-sea channel genesis comparison hydrate enrichment zones

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Classification of mass-transport complexes and distribution of gashydrate-bearing sediments in the northeastern continental slope of the South China Sea

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Frontiers of Earth Science 2020年第1期14卷 25-36页

作者： Chao FU xinghe yu Xue FAN yulin HE Jinqiang LIANG Shunli LI School of Energy Resources China University of GeosciencesBeijing 100083China Zhongyuan Gas Storage Company Limited SINOPECPuyang 400083China Guangzhou Marine Geological Survey Ministry of Land and Nature ResourceGuangzhou 510760China

The drilling areas in Shenhu and Dongsha,South China Sea,studied from 2007 to 2015,reveal great heterogeneity in the spatial distribution of the gas hydrate *** types of mass-transport complexes(MTCs)were developed in the study areas,which served as ideal *** conduct exploration in these areas,it is necessary to study the different types of MTCs and the corresponding gashydrate *** integrating seismic reflection and log coring data,we classified three types of MTCs according to their stress distribution:the tension,extrusion,and shear types,and their corresponding gashydrate accumulation *** results show that the accumulation of the gas-hydrate varies with the type of MTC and stress distribution depending on the MTC’s position(e.g.,in the headwall,translational,or toe areas).Owing to this variance of the MTC’s position,the corresponding kinemics situation in the MTCs also ***,we determined the corresponding location in which the gashydrate develops for various types of *** on the bottom simulating reflectors(BSRs)and the hydrate core and image logging data,the gashydrate reservoir shows an obvious heterogeneity in various types of *** gashydrate in the tension-type MTCs are mostly borne in the toe and the headwall *** extrusion-type MTCs,the translational and toe parts constitute an ideal hydrate *** shear-type MTCs,the headwall and toe parts’coarse-grained sediments show an obviously hydrate *** comparing the gashydrate saturation and MTCs morphology statics data,we were able to quantitatively prove that the main factors determining gashydrate accumulation in the different types of MTCs are the fault displacement,sedimentary rate,and flow erosion rate.

关键词： gas hydrate accumulation pattern masstransport complexes(MTCs) stress distribution South China Sea

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Interaction between Downslope and Alongslope Processes on the Margins of Daihai Lake,North China:Implication for Deltaic Sedimentation Models of Lacustrine Rift Basin

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Acta Geologica Sinica(English Edition) 2012年第4期86卷 932-948页

作者： yu xinghe LI Shunli CHEN Bintao TAN Chengpeng XIE Jing HU Xiaonong China University of Geosciences Florida State University Department of EarthOcean and Atmospheric SciencesTallahasseeFL 32306USA

Daihai Lake, a modern lacustrine rift basin, located in Inner Mongolia, North China, serves as an important modern analog for understanding deltaic depositional processes in an active rift setting. Two of the deltas （yuanzigou delta and Bulianghe delta） on the margins of Daihai Lake were surveyed to compare and contrast stacking patterns using aerial photographs, field trenching and sediment sampling. Shallow cores and trench data collected from the margins of Daihai Lake indicate that a variety of depositional processes have been active since Daihai Lake formed. Two 3-D sedimentation models which employ chronostratigraphic correlation technique were generated. The chronostratigraphic sedimentation models predict and represent the architectures and sand-body continuity of sediments. Stratigraphical coincidence of the broad sheeted drifts and channel erosion suggests a coupling between downslope and alongslope processes. Distributary mouth bars are prevalent in the front of deltas on steeper slopes due to the dominance of down-slope flows. On the contrary, the along-slope currents favor the development of distal bar deposits with sheeted sandbodies on gentle depositional slopes. This study provides an insight into the architecture of complex sedimentary facies associated with highlighting key differences between downslope flows and alongslope currents. The distribution of sand within these deltas is of particular interests, with applications in understanding the architecture of hydrocarbon reservoirs formed in lacustrine rift basin.

关键词： downslope flows alongslope currents architectural element spatial extension model Daihai Lake

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Different initial density turbidite sediments with coarse grain injection and their corresponding flow pattern: Additional insights from numerical simulation in a study case of South China Sea

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Petroleum Research 2019年第1期4卷 19-28页

作者： Chao Fu xinghe yu yulin He Jianqiang Liang Zenggui Kuang School of Energy Resources China University of GeosciencesBeijingBeijing100083China Guangzhou Marine Geological Survey Guangzhou510760China

The work presents the sedimentology and depositional results of the turbidity flow from Miocene to Pliocene along the North Slope of South China Sea(SCS).The integration of the core-log-seismic data has enabled us to clarify turbidity flow with different density and characterize their corresponding seismic geomorphic *** on the differences between the initial density and the later,we classified the turbidity flow into two types,namely:low-and high-density flow with coarse grain *** to the hydrodynamic numerical simulation results,we constructed different subcritical turbidity flow models with various density and rebuilt the depositional pattern along the *** to the numerical simulation model,we introduced the erosion rate into the classical full Reynolds-averaged N-S(RANS)equation,which is suitable to the deep-sea slope *** comparison of the above simulation models,the results show that the high-density turbidites with coarse-grained injection are mostly developed with lower vertical erosion rates and higher lateral abrasion *** are characterized with multi-branched and lobe-shaped sedimentary volumes,while low-density turbidites with coarse-grained injection are characterized with higher vertical erosion rates and lower lateral abrasion *** this kind of turbidites can generate single-branched and banding *** addition,the fluctuating sea levels and the varying topographies are important to influence the subcritical turbidity flow models in the deep-water slope.

关键词： Turbidite sedimentation Subcritical turbidity flow Numerical simulation Deep-water slope Flow pattern

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Geochemical constraints on mixed source and hydrocarbon filling process in theYingjisu Sag,Tarim Basin,Xinjiang

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Chinese Journal Of Geochemistry 2009年第3期28卷 308-313页

作者： PANG Lingyun CHANG Xiangchun WANG Mingzhen yu xinghe MA Lixin DUAN yunge College of Energy Resources China University ofGeosciences Beijing 100083 China College of Geo-science and Technology Shandong University of Science and Technology Qingdao 266510 China

The Yingjisu Sag was petroliferous for normal oil, condensate oil, reservoir bitumen and natural gases. Geochemical studies showed that natural gases in the Yingjisu Sag were a gas mixture consisting mainly of Cambrian pyrolysis gas, Jurassic condensate oil in well Yingnan 2 and normal oil in well Tadong 2, reflecting the characteristics of marine-phase gases and oils, while crude oils in well Longkou 1 demonstrated the characteristics of both marine and terrestrial oils, which were derived from lower algae and higher plants. Jurassic oils from wells Longkou 1 and Huayingcan 1 and Cambrian crude oils from well Tadong 2 were derived mainly from Cambrian-Lower Ordovician source rocks. Jurassic and Silurian reservoir bitumens from well Yingnan 2 were biodegradated, suggesting they are of marine and terrestrial origins. The bitumens have similar geochemical characteristics, which are correlated well with Ordovician crude oils from well Tadong 2 and Jurassic condensate oil from well Yingnan 2. Based on the characteristics of tectonic evolution in this area and the analysis of hydrocarbon accumulation, the constraints on the mixed source and hydrocarbon filling process in the Yingjisu Sag were brought forward.

关键词：塔里木盆地英吉苏凹陷地球化学制约油气成藏混合气体油源新疆地球化学特征

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