检索结果-南通市图书馆

Geometry and 3D seismic characterisation of post-rift normal faults in the Pearl River Mouth Basin,northern South China sea

引用

Acta Oceanologica Sinica 2024年第4期43卷 25-39页

作者： Yuanhang Liu Jinwei Gao Wanli Chen Jiliang Wang Umair Khan laboratory of marine geophysics and georesources Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanya 572000China University of Chinese Academy of Sciences Beijing 100049China

Based on high-resolution 3D seismic data acquired in the Pearl(Zhujiang)River Mouth Basin of the northern South China sea,this study investigated the geometry,spatial extension,and throw distribution of the post-rift normal fault through detailed seismic interpretation and fault modeling.A total of 289 post-rift normal faults were identified in the study area and can be classified into four types:(1)isolated normal faults above the carbonate platform;(2)isolated normal faults cutting through the carbonate platform;(3)conjugate normal faults,and(4)connecting normal *** distribution analysis on the fault planes show that the vertical throw profiles of most normal fault exhibit flat-topped *** normal faults above the carbonate platform exhibit roughly concentric ellipses with maximum throw zones in the central section whereas the normal faults cutting through the carbonate platform miss the lowermost section due to the chaotic seismic reflections in the interior of the carbonate *** vertical throws of conjugate normal faults anomalously decrease toward their intersection region on the fault plane whereas the connecting normal faults present two maximum throw zones in the central section of the fault *** to the symmetric elliptical distribution model of fault throw,an estimation was made indicating that normal faults cutting through the carbonate platform extended downward between-1308 s and-1780 s(two-way travel time)in depth and may not penetrate the entire Liuhua carbonate ***,it is observed that the distribution of karst caves on the top of the carbonate platform disaccord with those of hydrocarbon reservoirs and the post-rift normal faults cutting through the carbonate platform in the study *** propose that these karst caves formed most probably by corrosive fluids derived from magmatic activities during the Dongsha event,rather than pore waters or hydrocarbons.

关键词： Post-rift normal faults fault throw Karst caves Corrosive fluids Pearl River Mouth Basin South China sea

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multi-spheric interactions driven differential formation and accumulation of hydrocarbon resources in the North sea Basin

引用

Science China Earth Sciences 2024年第11期67卷 3397-3420页

作者： Rixiang ZHU Shuichang ZHANG Huajian WANG Xiaomei WANG Yuke LIU Wang ZHANG Fang HAO Zhijun JIN Key laboratory of deep Petroleum Intelligent Exploration and Development Institute of Geology and Geophysics Chinese Academy of Sciences State Key laboratory of Enhanced Oil & Gas Recovery Research Institute of Petroleum Exploration and Development China National Petroleum Corporation State Key laboratory of deep Oil and Gas China University of Petroleum (East China) Institute of Energy Peking University

The North sea Basin is the most important oil and gas producing area in Europe and the birthplace of many classic petroleum geological theories. From the perspective of multi-spheric interactions in the Earth, this study investigated the riftforeland-rift evolution process of the North sea Basin, which was controlled by the deep dynamic driving forces of the continental collision orogeny, mantle plume uplift, and intraplate deformation. The North sea Basin was found to have drifted northward since the Carboniferous and passed through the low-latitude Hadley and the mid-latitude Ferrel cells. Two sets of main hydrocarbon source rocks have formed, the coals and coal measures of the Upper Carboniferous Westphalian and the marine shale of the Upper Jurassic Kimmeridge Clay Formation. We propose that the deep processes, tectonic activity, and transgression-climate evolution jointly controlled the types and horizons of the source rocks, reservoirs, and seals in different regions of the North sea Basin. In the southern North sea Basin, a Carboniferous-Lower Triassic gas-rich petroleum system was formed,which is characterized by transitional coal measure source rocks, desert aeolian sandstone reservoirs, and evaporite cap rocks. In the northern North sea Basin, an Upper Triassic-Paleogene oil-rich petroleum system was formed, which is characterized by marine graben-type source rocks, deltaic sandstone and marine limestone reservoirs, and marine tight marl and shale cap *** late tectonic burial and uplift in the North sea Basin further controlled the processes of oil and gas generation and accumulation, ultimately leading to a differential distribution pattern which is oil rich in the northern part and gas rich in the southern part of the basin. In the future, there is an urgent need to re-examine the mechanisms for the petroleum generation and accumulation in large mature exploration areas(e.g., super basins such as the North sea) and low exploration areas(e.g., the O

关键词： North sea Basin Multi-spheric interactions Petroleum system Okhotsk sea region

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Detection of a mud volcano in the Weitan Banks area of the northern South China sea

引用

Journal of Oceanology and Limnology 2024年第5期42卷 1450-1469页

作者： Wei LUO Pin YAN Yanlin WANG Junhui YU Qionghua WAN Zhenbo ZHANG Tao XUE Key laboratory of Ocean and Marginal sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China Southern marine Science and Engineering Guangdong laboratory(Guangzhou) Guangzhou 511458China CNOOC International Energy Services(Beijing)Co. Ltd.Beijing 100028China University of Chinese Academy of Sciences Beijing 100049China Oilfield Engineering Research Institute of geophysics CNOOC Energy Technology and ServicesZhanjiang 524057China

Situated between the petroliferous Cenozoic Zhujiang(Pearl)River Mouth Basin and the mud volcano-rich Mesozoic Dongsha Basin in the middle sector of the northern South China sea,the Weitan Banks area has been previously mapped as a basement high that is composed of Mesozoic magmatic *** this study,we present several favorable indicators for petroleum geology that were detected from geophysical profiling and benthic sampling in the area.A conspicuous hill was discovered,named“Zhongwei Hill”,~80 m high above the~340 m deep seafloor and~1 km broad,in a depression with more than 7 km thick sedimentary *** Zhongwei Hill was seismically imaged with a mushroom-shaped structure and containing a cake-like crown,fluid flow pipes,and an~10 km broad anticline at ***,the hill represents a source-plumbing-eruption *** gas zones linked to deep fracture were found at or near the *** correlation indicates that the deep strata comprise the Jurassic and Paleogene strata,the major hosts of hydrocarbon source *** addition to the hill,there are number of mounds from which three bottom water samples were collected and the samples are rich in dissolved methane with concentrations high up to~900 nmol/L,much higher than the background level(0.5–2 nmol/L).The benthic samples are rich in coarse sediment clastics,authigenic carbonate nodules,and deep-water habitats likely feeding on methanotrophic *** these observations and the context,we propose that the Zhongwei Hill represents a mud volcano,likely thermally driven,that seeps methane from Jurassic and Paleogene source layers,thus poses a favorable clue for significant hydrocarbon generation capacity in transitional zone of the Zhujiang River Mouth Basin and the Dongsha Basin.

关键词： South China sea Zhongwei Hill deep-level anticline mud volcano Mesozoic source layer hydrocarbon generation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sediment Compaction and Pore Pressure Prediction in deepwater Basin of the South China sea: Estimation from ODP and IODP Drilling Well Data

引用

Journal of Ocean University of China 2018年第1期17卷 25-34页

作者： XIE Yangbing WU Tuoyu SUN Jin ZHANG Hanyu WANG Jiliang GAO Jinwei CHEN Chuanxu laboratory of marine geophysics and georesources Institute of Deep-Sea Science and Engineering Chinese Academy of Sciences laboratory for marine Geology Qingdao National Laboratory for Marine Science and Technology Department of Earth and Environment Sciences University of Windsor ON

Overpressure in deepwater basins not only causes serious soft sediment deformation, but also significantly affects the safety of drilling operations. Therefore, prediction of overpressure in sediments has become an important task in deepwater oil exploration and development. In this study, we analyze the drilling data from ODP Leg 184 Sites 1144, 1146, and 1148, and IODP Leg 349 Sites U1431, U1432, U1433, and U1435 to study the sediment compaction and controls in the northern South China sea. Sedimentation rate, sediment content, distribution area, and buried depth are the factors that influence sediment compaction in the deepwater basin of the South China sea. Among these factors, the sediment content is the most important. The fitted normal compacted coefficients and mudline porosity for an interval of 50 m shows disciplinary variation versus depth. The pore pressure predicted from different fitted results shows varying overpressure situations. The normal compaction trend from Site 1144 reflects the porosity variation trend in stable deposition basins in the northern South China sea. The predicted pore pressure shows overpressure at Site 1144, which is attributed to compaction disequilibrium. Nevertheless, the mixed lithology column may influence the predicted overpressure at Site 1148, which is responsible for the confusing result. Above all, we find that sediment compaction should serve as a proxy for pore pressure in the deepwater basin of the South China sea.

关键词： normal compaction pore pressure prediction deepwater basin South China sea

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Post-Rifting Magmatism and the Drowned Reefs in the Xisha Archipelago Domain

引用

Journal of Ocean University of China 2018年第1期17卷 195-208页

作者： WANG Hongli ZHAO Qiang WU Shiguo WANG Dawei WANG Bin Key laboratory of marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences College of Earth Sciences University of Chinese Academy of Sciences Key laboratory of marine Sedimentology and Environmental Geology First Institute of OceanographySOA laboratory for marine Geology Qingdao National Laboratory for Marine Science and Technology laboratory of marine geophysics and deep-sea georesources Institute of Deep-Sea Science and Engineering Chinese Academy of Sciences Hangzhou Institute of Petroleum Geology PetroChina

Fourteen isolated drowned reefs have been identified around the Xisha Uplift by multibeam and seismic data. The drowning processes of these reefs can be divided into three different stages, which correspond to three different accelerated tectonic subsidence periods. The drowning of the Xisha reefs is the result of the combined action of tectonic subsidence and sea level fluctuations, and the tectonic subsidence rate had to remain above 0.2 mm yr^(-1 )for a long time. Three abrupt accelerated tectonic subsidence events that occurred in the late Miocene, Pliocene and early Quaternary in the Xisha Uplift were closely related to the thermal subsidence processes after three stages of post-rifting magmatism. The magmatism of the middle Miocene and the following thermal subsidence resulted in the drowning of reefs in the northwestern Xisha uplift(Zone A). During the early Pliocene, massive magmatic intrusions and volcanic eruptions occurred in the Xisha Uplift. Then, the subsequent thermal subsidence started the drowning process of reefs in the northeastern and western regions of the Xisha Uplift(Zone B and C). During the early Quaternary, large-scale magmatism also occurred in the Xisha Uplift. The subsequent thermal subsidence resulted in a new rapid tectonic subsidence, which caused the reefs in the southern and southeastern regions of the Xisha Uplift to drown(Zone D and E).

关键词： magmatism tectonic subsidence drowned reef Xisha Archipelago

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Leak-Off Mechanism and Pressure Prediction for Shallow Sediments in deepwater Drilling

引用

Journal of Ocean University of China 2018年第1期17卷 65-71页

作者： TAN Qiang DENG Jingen SUN Jin LIU Wei YU Baohua State Key laboratory of Petroleum Resources and Prospecting ChinaUniversity of Petroleum-Beijing Key laboratory of marine georesources and Prospecting (Hainan Province) Institute of Deep-Sea Science and Engineering Chinese Academy of Science

deepwater sediments are prone to loss circulation in drilling due to a low overburden gradient. How to predict the magnitude of leak-off pressure more accurately is an important issue in the protection of drilling safety and the reduction of drilling cost in deep water. Starting from the mechanical properties of a shallow formation and based on the basic theory of rock-soil mechanics, the stress distribution around a borehole was analyzed. It was found that the rock or soil on a borehole is in the plastic yield state before the effective tensile stress is generated, and the effective tangential and vertical stresses increase as the drilling fluid density increases; thus, tensile failure will not occur on the borehole wall. Based on the results of stress calculation, two mechanisms and leak-off pressure prediction models for shallow sediments in deepwater drilling were put forward, and the calculated values of these models were compared with the measured value of shallow leak-off pressure in actual drilling. The results show that the MHPS(minimum horizontal principle stress) model and the FIF(fracturing in formation) model can predict the lower and upper limits of leak-off pressure. The PLC(permeable lost circulation) model can comprehensively analyze the factors influencing permeable leakage and provide a theoretical basis for leak-off prevention and plugging in deepwater drilling.

关键词： deepwater drilling shallow sediments leak-off mechanism leak-off pressure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Well logging evaluation of fine-grained hydrate-bearing sediment reservoirs: Considering the effect of clay content

引用

Petroleum Science 2023年第2期20卷 879-892页

作者： Lin-Qi Zhu Jin Sun Xue-Qing Zhou Qing-Ping Li Qi Fan Song-Lin Wu Shi-Guo Wu laboratory of marine geophysics and georesources of Hainan Province Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanya572000HainanChina laboratory for marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdao266061ShandongChina Southern marine Science and Engineering Guangdong laboratory(Zhuhai) ZhuhaiGuangdong519000China State Key laboratory of Natural Gas Hydrates Beijing100028China China National Offshore Oil Corporation Research Institute Co.Ltd. Beijing100028China

Hydrate reservoirs are different from the host reservoirs of all other fossil energy sources because the characteristics of hydrate reservoirs are generally controlled by deep-sea fine-grained sedimentation. In such reservoirs, the reliability of the classical logging evaluation models established for diagenetic reservoirs is questionable. This study used well W8 in the Qiongdongnan Basin to explore the clay content, porosity, saturation, and hydrate-enriched layer identification of a logging-based hydrate reservoir, and it was found that considering the effect of the clay content on the log response is necessary in the logging evaluation of hydrate reservoirs. In the evaluation of clay content, a method based on the optimization inversion method can obtain a more reliable clay content than other methods. Fine-grained sediment reservoirs have a high clay content, and the effect of clay on log responses must be considered when calculating porosity. In addition, combining density logging and neutron porosity logging data can obtain the best porosity calculation results, and the porosity calculation method based on sonic logging predicted that the porosity of the studied reservoir was low. It was very effective to identify hydrate layers based on resistivity, but the clay distribution and pore structure will also affect the relationship between resistivity, porosity and saturation, and it was suggested that the factors effecting the resistivity of different layers should be considered in the saturation evaluation and that a suitable model should be selected. This study also considered the lack of clarity of the relationships among the lithology, physical properties, hydrate-bearing occurrence properties, and log response properties of hydrate reservoirs and the lack of specialized petrophysical models. This research can directly help to improve hydrate logging evaluation.

关键词： Gas hydrate Well logging Porosity Saturation Shale distribution form

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Slope Instability Analysis of the Qiongdongnan Basin in the Northern Part of the South China sea:Implications for the Risk Evaluation of deepwater Drilling

引用

Journal of Ocean University of China 2023年第2期22卷 393-409页

作者： MA Linwei WU Shiguo LIU Yanrui SUN Jin OUYANG Min LI Qingping QIN Yongpeng WANG Dawei laboratory of marine geophysics and georesources Institute of Deep-Sea Science and EngineeringChinese Academy of SciencesSanya 572000China University of Chinese Academy of Sciences Beijing 100049China College of geophysics Chengdu University of TechnologyChengdu 610059China CNOOC China Limited Zhanjiang BranchZhanjiang 524057China State Key laboratory of Natural Gas Hydrate CNOOC Research Institute Company LimitedBeijing 100028China

The instability of continental slopes damages marine engineering equipment,such as submarine pipelines,resulting in the generation of tsunamis,which endangers the safety of nearshore ***,research on the instability of continental slopes where submarine landslides usually occur is crucial to the risk evaluation of deepwater *** studies were mainly based on simplified 2D and 3D models,which extend the 2D model applied on submarine slopes with complex *** this study,a numerical model with bathymetric data from the Qiongdongnan Basin was ***,3D slope stability analysis and static and dynamic analyses were *** static analysis found two discussions where slopes are most likely to *** the analysis of different seismic forces,the dynamic result showed that an instability area is added to the two positions where the static analysis is *** scatters and transmits seismic waves and controls the accumulation and diffusion of seismic energy.3D calculations and analysis revealed that the direction of slope instability is closely related to terrain inclination,slope,terrain effect,and terrain *** showed that instability situations could not be derived from a single direction or profile *** situations are an important factor in slope stability analysis and are critical to the prediction and evaluation of marine geological disasters.

关键词： South China sea submarine landslide slope instability topography curvature topography slope granite

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Development of the Miocene Guangle Carbonate Platform in the South China sea:Architecture and Controlling Factors

引用

Acta Geologica Sinica(English Edition) 2021年第1期95卷 177-191页

作者： YANG Zhen LI Xuelin HUANG Lei WANG Liaoliang WU Shiguo ZHANG Xinyuan Guangzhou marine Geological Survey China Geological SurveyGuangzhou 510075China Southern marine Science and Engineering Guangdong laboratory(Guangzhou) Guangzhou 511458China laboratory of marine geophysics and Georesource Institute of Deep Sea Science and EngineeringChinese Academy of SciencesSanyaHainan 572000China laboratory for marine Geology Qingdao National Laboratory for Marine Science and TechnologyQingdaoShandong 266061China

This study investigates the evolution of the Miocene Guangle carbonate platform(or Triton Horst)of the northwestern South China sea *** platform is located at a junction area surrounded by Yinggehai basin,Qiongdongnan basin and Zhongjiannan *** and regional geophysical data allow the identification of the morphologic and stratigraphic *** Guangle carbonate platform was initiated on a tectonic uplift during the Early *** early platform was limited at Mesozoic granitic basement,pre-Paleogene sediments localized tectonic uplift and was small extension at the beginning *** during the Middle Miocene,the carbonate buildup flourished,and grow a thrived and thick carbonate succession overlining the whole Guangle *** isolated platforms then united afterward and covered an extensive area of several tens of thousands of square ***,it terminated in the Late *** are the control factors on the initiation,growth and demise of the Guangle carbonate platform?The onset of widespread carbonate deposits largely reflected the Early Miocene transgression linked with early post-rift subsidence and the opening of the South China *** carbonate growth conditions on the Guangle carbonate platform probably resulted from increased inorganic nutrient input derived from the adjacent uplifted mainland,possibly enhanced by deteriorated climatic conditions promoting platform ***,tectonics and terrigenous input could be two main controlling factors on the development of the Guangle carbonate platforms and main evolution stages.

关键词： carbonate platform seismic characteristics tectonic subsidence South China sea

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：