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| 1 | The Development Characteristics and Distribution Predictions of the Paleogene Coal-measure Source Rock in the Qiongdongnan Basin,Northern South China Sea显示文摘There are known to be enormous Cenozoic coal-type oil and gas resources located in the basins of the South China Sea,among which the Paleogene coal-measure source rock are one of the main source rock.In order to more effectively analyze the distribution laws of coal-measure source rock in marginal sea basins and guide coal-type oil and gas explorations,the Oligocene coal-measure source rock in the Qiongdongnan Basin were selected as examples in order to systematically analyze the types,development characteristics,control factors,and distribution prediction methods of coalmeasure source rock in marginal sea basins.The Qiongdongnan Basin is located in the northern region of the South China Sea.Previous explorations of the area have determined that the Oligocene coal-measure source rock in the Qiongdongnan Basin have typical'binary structures',which include coal seams and terrigenous marine mudstone.Among those,the terrigenous marine mudstone has been found to greatly expand the scope of the coal-measure source rock.In addition,the coal seams which have been exposed by drilling have been observed to have the characteristics of thin single layer thickness,many layers,and poor stability.Meanwhile,the terrigenous marine mudstone has the characteristics of large thickness and wide distribution.The development of coal-measure source rock is known to be controlled by many factors,such as paleoclimate and paleobotany condition,paleo-structure and topography,paleo-geography,rise and fall of base level,and so on.In accordance with the comprehensive analyses of various control factors of coal-measure source rock,and the changes in water body energy in sedimentary environments,a genetic model of the'energy belt'for the development and distribution of coal-measure source rock was proposed.Also,the development and distribution characteristics of coalmeasure source rock in different types of energy belts were clarified.Then,based on the development and distribution characteristics of coal-measure source rock and their controlling factors,prediction methods of the distribution ranges of coal-measure source rock were proposed from both qualitative and(semi-)quantitative aspects.That is to say,a method for(semi-)quantitative predictions of the distribution ranges of coal-bearing intervals based on model wave impedance inversion and neural network wave impedance inversion,along with a method for(semi-)quantitative predictions of the distribution ranges of terrigenous marine mudstone based on topographical slopes,were introduced in this study. | WANG Dongdong ZHANG Gongcheng LI Zengxue DONG Guoqi SUN Rui GUO Shuai WU Yue | 2021 | Acta Geologica Sinica(English Edition)2021，95，1： | 3 |
| 2 | Depositional Environments of the Upper Permian Quartzose Sandstone(Shandong Province, North China): Insight from Trace Element Geochemistry显示文摘The depositional environment of the Upper Permian quartzose sandstone(Kuishan sandstone in Shihezi Formation of Upper Permian) in the North China epicontinental basin is controversial. In order to test the previous hypotheses, we analyzed sedimentological characteristics of the Kuishan sandstones in outcrops and boreholes, and carried out trace element geochemical analysis by electron probe microanalyzer. Three lithofacies were recognized, including normal-graded conglomerate(Cng), trough and planar cross-bedded coarse sandstone(CStpc), and planar cross-bedded medium sandstone(MSpc). Normal-graded conglomerate(Cng) formed in the meandering river or deltaic distributary channels. Trough and planar cross-bedded coarse sandstone(CStpc) formed in meandering river or distributary channels of near-source deltaic plain. Planar cross-bedded medium sandstone(MSpc) formed in the siliciclastic beach with high- to moderate-energy conditions. By the petrology and trace elements analysis, three relatively large-scale transgressions were revealed. Each transgression was reflected by the lower content of Ba and ratios of Fe/Mn, and the high content of B and ratios of B/Ga. The ratios of Ni/Co of all samples are all lower than 2, suggesting oxygen-enriched shallower water environment during deposition of the Kuishan sandstones. | Dawei Lü Zengxue Li Jitao Chen Ying Liu Zengqi Zhang Jipo Liang Haiyan Liu | 2015 | Journal of Earth Science2015，26，2： | 2 |
| 3 | Cenozoic giant coal-bearing basin belt discovered in China's sea and its adjacent areas显示文摘Sea area is an important area of oil and gas exploration in China.It has been found that China's sea area mainly consists of coal type oil and gas,and the exploration of coal-bearing series source rocks has become an important part of oil and gas exploration there.Through years of comprehensive geological research in China's sea area,it has been revealed that it has undergone multiple occurrences of tectonic opening and closing movements in varying degrees in the Paleogene,forming 26 Cenozoic sedimentary basins of various types,such as active continental margin,passive continental margin,transitional continental margin and drift rift basins.In the present study,it is observed for the first time that coal type source rocks are mainly developed in 14 continental margin basins in China's sea area,revealing that a very large C-shaped coal-bearing basin group developed there in the Cenozoic.Next,based on the coupling analysis of paleoclimate,paleobotany,paleogeography and paleostructure,it is observed that there are five coal-forming periods in China's sea area,namely the Paleocene,Eocene,early Oligocene,late Oligocene and Miocene-Pliocene,and the coal-forming age is gradually new from north to south.It is also found that the coal seams in the sea area are mainly developed in three coal-forming environments in Cenozoic,namely delta,fan delta and tidal flat-lagoon.The coal seams developed in different environments are characterized by thin thickness,many layers and poor stability.However,the coal-bearing series source rocks in China's sea area have a wide distribution range,very high thickness and large amount,thus forming a material basis for the formation of rich coal type oil and gas. | Gongcheng Zhang Ying Chen Dongdong Wang Zengxue Li | 2023 | Acta Oceanologica Sinica2023，42，3： | 1 |
| 4 | Characteristics of the Permian coal- formed gas sandstone reservoirs in Bohai Bay Basin and the adjacent areas, North China 显示文摘 | Lv Dawei Li Zengxue | 2011 | Journal of Petroleum Science and Engineering2011，，： | 1 |
| 5 | Controlling Factors, Accumulation Model and Target Zone Prediction of the Coal-bed Methane in the Huanghebei Coalfield~ North China显示文摘 | Dawei Lv Jitao Chen Zengxue Li | 2014 | The Society of Resource Geology2014，64，： | 1 |
| 6 | The Characteristics of Coal and Oil Shale In The Coastal Sea Areas of Xuangx- ian Coalfield,Eastern China显示文摘 | LV Dawei LI Zengxue LIU Haiyan | 2015 | Oil Shale2015，32，3： | 1 |
| 7 | A Comparative Study of the Coal-forming Characteristics of Marginal Sea Basins and Epicontinental Sea Basins显示文摘The coal-forming characteristics,as well as the similarities and differences between epicontinental sea basins and continental marginal sea basins developed during different time periods,were analyzed in this study by adopting comparative analysis thoughts and methods.The results obtained in this study revealed that epicontinental basins and marginal sea basins are both characterized by the main development of thin coal seams or extremely thin coal seams.In addition,changes in sea levels were determined to be the main controlling factors for coal formation,and there were similarities in the continent-sea interactions and coal-forming sedimentary systems of the different basins.However,there were also significant differences observed in the sea level change events,basin basement structural characteristics,coal seam stability levels,accumulation and aggregation characteristics,and the migration patterns of coal-forming materials.For example,the marginal sea basins in the South China Sea were found to be characterized by strong tectonic activities,diversity and complexity.The basin structures showed complex patterns of depressions,uplifts and concave or sag uplifts,which tended to lead to greater complexity in the paleogeographic patterns of the coal formations.This had subsequently resulted in complex coal-forming processes and paleogeographic characteristics,in which the coal-forming zones displayed bead-like distributions,and the enrichment areas and centers were scattered.The practical significance of studying the similarities and differences of the coal-forming characteristics between epicontinental basins and marginal sea basins is that the results can potentially be used to guide the predictions of coal-measure coal seam distributions in South China Sea,as well as provide valuable guidance for future explorations of natural gas reservoirs related to coal measures in the South China Sea area. | ZHAO Honggang LI Ying CHANG Xiangchun LI Zengxue LIU Haiyan ZHAO Cunliang | 2021 | Acta Geologica Sinica(English Edition)2021，95，1： | 1 |
| 8 | High Reso- lution Sequence Division And Transgreassive Events Coal Formation In Southern North China Epicontinental Basin显示文摘 | Li Zengxue Wei Jiuchuan Han Meilian Yang Fengjie | 2000 | JOURNAL OF COAL SCIENCE & ENGNEERING(CHI~A)2000，6，1： | 1 |
| 9 | The classification and significance of fine-grained deposits of micro-laminae rich in unconventional oil and gas resources显示文摘In this study,an in-depth analysis of the types,characteristics,and formation mechanisms of microlaminae and microscopic laminae was conducted in order to precisely examine the link or intersection of stratigraphy and petrology.This study was essentially a sedimentary examination of the minuteness-macro and micro-tiny layers between laminae and pore structure,as well as the types of structures and sedimentation.The results of this study bear important basic subject attributes and significance,as well as practical value for the basic theories and exploration applications of unconventional oil and gas geology.The quantitative data were obtained using the following:field macroscopic observations;measurements;intensive sampling processes;XRD mineral content analysis;scanning electron microscopy;high-power polarizing microscope observations;and micro-scale measurements.The quantitative parameters,such as laminae thicknesses,laminae properties,organic matter laminae,and laminae spatial distributions were unified within a framework,and the correlations among them were established for the purpose of forming a fine-grained deposition micro-laminae evaluation system.The results obtained in this research investigation established a basis for the classification of micro-laminae,and divided the micro-laminae into four categories and 20 sub-categories according to the development thicknesses,material compositions,organic matter content levels,and the spatial distributions of the micro-laminae.The classification scheme of the micro-laminae was divided into two categories and 12 sub-categories.Then,in accordance with the comprehensive characteristics of spatial morphology,the micro-laminae was further divided into the following categories:continuous horizontal laminae;near horizontal laminae;slow wavy laminae;wavy laminae;discontinuous laminae;and lenticular laminae.According to the structural properties of the laminae development,the micro-laminae was divided into the following categories:single laminae structures;laminated laminae structures;interlaminar structures;multiple mixed laminae structures;cyclic laminae structures;and progressive laminae structures.The research results were considered to be applicable for the scientific evaluations of reservoir spaces related to unconventional oil and gas resources. | Li DONG Ying LI Dongdong WANG Haiyan LIU Guangzeng SONG Zengxue LI Fanfei KONG Lusheng YIN | 2022 | Frontiers of Earth Science2022，16，3： | 0 |
| 10 | Geological Interpretation and Hydrocarbon Exploration Potential of Three Types of Mound-shaped Reflectors in the Meishan Formation,Southern Qiongdongnan Basin显示文摘Many mound-shaped reflectors with different features and shapes are evident in the Upper Member of the Meishan Formation from seismic profiles taken in the deep-water area of the Southern Qiongdongnan Basin.Based on the drilling,2 D and 3 D seismic data from the study area,descriptions of the seismic reflection characteristics as well as the geometric shape,wave impedance inversion,analogy and comparative analyses are carried out.Taken in conjunction with research on the paleo structure and paleo sedimentary background,we consider that the mound-shaped seismic reflectors are distributed in the Southern Slop belt and the Southern High-rise of the Qiongdongnan Basin,which can be subdivided into three types:reefs,contourite mounds and magmatic diapirs.The first type,reefs,includes patch reefs,platform marginal reefs and pinnacle reefs.Patch reefs present mound-shaped seismic facies with medium frequency and a moderately strong amplitude,being distributed at the uplift of the fault control platform on the Southern Slop belt.The platform marginal reefs have flat mound-shaped seismic facies with strong amplitude and medium frequency,developing at the margin of the carbonate platform in the Southern High-rise.The pinnacle reefs have mound-shaped seismic facies with strong amplitude and medium frequency and are developed on an isolated volcanic cone.The boundaries between individual reefs are clear on the seismic section,with reef ridge and reef ditch developed,the phenomenon of’front product’being visible within,two-way superelevation between wings is developed and they exist visibly as mounds in any viewed direction of the crosssection.They are slightly asymmetrical in the direction perpendicular to the paleodepth the reef body being steep near the deep-water side,while being gentle near the shallow water side.The wave impedance of a patch reef is about 7 kg/m^(3)×m/s,while the wave impedance of a platform marginal reef is about 7.5 kg/m^(3)×m/s.The second type-contourite moundsare mainly developed under the slope break of the southern slope fault control platform’s edge.They are subdivided into two types:conical and flat.The former has mound-shaped seismic facies with medium-strong amplitude and low frequency,the latter having mound-shaped seismic facies with medium amplitude and low frequency.The internal texture of the mounds is not clear on the seismic section,with the boundaries between contourite mounds being blurred.They are mound-shaped only in cross-section,being banded in the extending direction.The upper surface of a single contourite mound is relatively gentle near the deep-water side,while being steep near the shallow water area.The wave impedance of contourite mounds is about 5.8 kg/m^(3)×m/s,which is speculated to represent a marly to calcareous clastic deposit.The third type is the magmatic diapir,which has’roots’.They have a dome-shaped upper boundary,are bottomless,with a chaotic interior.They penetrated multiple formations,opening towards the base.There are two major accumulation assemblages of reefs,one is the platform margin reef accumulation assemblage with distant source rocks and long-distance migration through an unconformity surface in the Southern High-rise,the other is the patch reef accumulation assemblage with twin sources and short distance migration through faults in the Southern Slop belt near the Central Depression zone.The latter is the main exploration targets at present.There are contourite mound accumulation assemblages with nearby source rocks and short distance vertical migration through faults,which are potentially important targets.The magmatic diapirs pierce the overlying strata and form good hydrocarbon traps and migration pathways,thus representing potential prospecting targets. | FENG Yangwei REN Yan LI Zengxue JIN Li | 2021 | Acta Geologica Sinica(English Edition)2021，95，1： | 0 |
| 11 | Schwann cell transplantation downregulates P2X3 receptor expression in trigeminal ganglia in rats with trigeminal neuralgia显示文摘Schwann cells are generally considered to play an important role in nerve repair and have been previously associated with neuropathic pain promoting the formation of the myelin sheath and the direct regeneration of axons.The efficacy of drug treatments is suboptimal making pain management difficult in patients with trigeminal neuralgia. | Li Jiajuan Yang Jiayi Liu Taotao Luo Yunfeng Liu Yiguo Liao Jiayi Chen Baokang Yang Baolin Liu Zengxu | 2021 | 解剖学杂志2021，44，S01： | 0 |
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