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垂向旋回
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     chang8 upgrowth vertical accretion in Xifeng area.
     西峰地区长8段主要发育垂向加积沉积旋回;
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     Metallogeny in Relation to Supercontinent
     超大陆旋回和成矿作用
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     GLOBAL CYCLOSTRATIGRAPHY
     全球旋回地层学
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     Vertical Accretion of Continental Crust
     陆壳的垂向增生
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     THE TRACK OF OIL AND GAS VERTICAL MIGRATION
     油气垂向运移的形迹
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  vertical cycle
Karst subzone division in vertical cycle zone and its significance
      
Vertical cycle karst zone has been studied for more than 100 years, however karst subzones in the zone have never been divided and affected depth of CO2 from rainwater in the zone has never been studied.
      
Deep karst morphology near groundwater level under vertical cycle zone develops better in the middle and late periods of karst process.
      
Determination of pile bearing capacity from the results of tests under vertical cycle loads (in order of discussion)
      
For Kerr-gated RR spectroscopy, samples in a spinning NMR glass tube were moved in a vertical cycle.
      


The sedimentological research on the Cambrian-Ordovician deposits in southwest Jiangxi demonstrates that the rocks are mainly composed of deep-water deposits, in which 5 facies and 5 subfacies are recognized on the basis of the lithology, textures and structures of the rocks: (1) sandstone facies, (2) sandstone-mudstone facies; (3) siltstone-mudstone facies; (4) mudstone (slate) facies; and (5) chert facies. Among them (1)-(4) are of turbidity current origin and (5) and part of (4) are related to pelagic and...

The sedimentological research on the Cambrian-Ordovician deposits in southwest Jiangxi demonstrates that the rocks are mainly composed of deep-water deposits, in which 5 facies and 5 subfacies are recognized on the basis of the lithology, textures and structures of the rocks: (1) sandstone facies, (2) sandstone-mudstone facies; (3) siltstone-mudstone facies; (4) mudstone (slate) facies; and (5) chert facies. Among them (1)-(4) are of turbidity current origin and (5) and part of (4) are related to pelagic and hemipelagic deposits.The Cambrian-Ordivician deposits are inferred to be a type of submarine fans intermediate between the elongate fan and radial fan according to the development of the sedimentary system. The distribution of the facies leads to the classification of facies associations, in which 3 facies associations are formed respectively in the environments of middle fan, lower fan and deep-sea plain. The Cambrian deposits in the studied area belong mainly to middle and lower fan associations, but the Ordo- vician deposits are quite different between the north and south parts of the studied area. The lower part of the Ordovician is characterized by the extensive deep-sea plain association.Three different orders of vertical cycles are distinguished in the stratigraphic sequence, i.e.: the 1st-order cycle with a thickness of thousands of meters the 2nd-order cycle 100-500m thick and the 3rd-order cycle with a thickness of several to tens of meters. They are considered to be controlled by the factors of sea-level variation, basin subsidence and submarine fan progradation.The tectonic setting of the sedimentary basin is interpreted as passive continental margins based on the chemical composition analysis of the sandstone.

赣西南地区的寒武系—奥陶系主要由深水环境沉积组成,可以识别出5个相类型:砂岩相,砂岩-泥岩相,粉砂岩-泥岩相,泥(板)岩相和硅岩相。它们属于浊流沉积和远洋-半远洋沉积。按相的分布,可以分出3个相组合,分别形成于中扇环境、外扇环境和深海平原环境。地层层序中的3级垂向旋回分别由海平面升降变化、盆地沉降和海底扇进积作用因素所控制。砂岩的化学成分反映其大地构造背景为被动大陆边缘。

The sedimentary face of Ng ( 1 + 2 ) sand sets in Gudao oil field is fluvial sediment, which changes sharply in the lateral and the vertical directions. The sand body herein is somewhat difficult to track. Using the method of the architectural elements analysis, and the cycle-thickness correlation method controlled by the index bed and the assist marked bed in this paper, we settle the problem of division/ correlation of the Ng(1 +2) strata. The finding of the assist marked bed in Ng(1 + 2) sand sets offered...

The sedimentary face of Ng ( 1 + 2 ) sand sets in Gudao oil field is fluvial sediment, which changes sharply in the lateral and the vertical directions. The sand body herein is somewhat difficult to track. Using the method of the architectural elements analysis, and the cycle-thickness correlation method controlled by the index bed and the assist marked bed in this paper, we settle the problem of division/ correlation of the Ng(1 +2) strata. The finding of the assist marked bed in Ng(1 + 2) sand sets offered a very important guarantee. According to the analysis of the architectural elements, the characteristic of the lithology and the granularity, the special state of the fluvial sand bodies and the calculation of the channel sinuosity, the vertical cyclicity and the sedimentary mode of the Ng(1 +2) fluvial sediment are well studied. It is quiet clear that the sand sets of the Ng( 1 +2) should be classified into a fine-graded fluvial sediment according to Miall' s 16-kind river classification schedule.

孤岛油田馆(1+2)砂层组属于河流相沉积,其纵向、横向相变迅速,砂体难以大面积追踪,本文利用河流结构单元分析法、标准层与辅助标志层控制下的“旋回—厚度”对比法,很好地解决了馆(1+2)地层的划分对比问题,其中馆(1+2)砂层组内辅助标志层的发现为地层的划分对比提供了重要的保证。根据结构单元分析、砂体的岩性特征、粒度特征、河流砂体的空间展布形态以及河流曲率的计算,对馆(1+2)河流沉积的垂向旋回性及沉积模式进行了研究。对比Miall的16种河流分类方案,孤岛油田馆(1+2)砂层组属于细粒曲流河沉积。

According to the sequence characteristics of well logging sedimentary facies obtained by common logging data,dip logging data and imaging logging data and the litho-facies interpretation by artificial neutral network(ANN),the types,spatial distribution and paleocurrent direction of sedimentary facies in Tazhong area were researched.The results show that detritus tidal flat deposits include sub-tidal sand flat,inter-tidal channel,mixed sand-mud flat,supra-tidal mud flat.The comparison of litho-facies to logging...

According to the sequence characteristics of well logging sedimentary facies obtained by common logging data,dip logging data and imaging logging data and the litho-facies interpretation by artificial neutral network(ANN),the types,spatial distribution and paleocurrent direction of sedimentary facies in Tazhong area were researched.The results show that detritus tidal flat deposits include sub-tidal sand flat,inter-tidal channel,mixed sand-mud flat,supra-tidal mud flat.The comparison of litho-facies to logging data section shows almost no difference.The provenance is mainly located in the northwest of the study area,and secondary provenance is northeastern during the depositional period of lower sandstone paragraph.Based on litho-logies section interpreted by logging data,the sedimentary structure and paleocurrent interpreted by using dip logging with the core correction and treatment results by ANN,the logging data models and deposition models of the key wells of Silurian sedimentary micro facies in Tazhong area were established.These models not only provide sequential and relatively exact litho-facies section for the analysis of relations of vertical cycles overlay of key wells,but also contribute to the research of spatial distribution of sedimentary system in the study region.In addition,the conclusion is also helpful to sequence division and correlation of transitional continental-oceanic facies and to the search for subtle oil and gas reservoirs in Tarim area.

根据常规组合测井、地层倾角测井及成像测井资料的测井相序列特征以及利用神经网络岩相处理结果,对塔中地区志留系沉积相类型及有利沉积相带的空间展布和古水流方向进行了研究。结果表明,将该区潮坪沉积划分为潮下带砂坪、潮间带砂泥坪和潮道、潮上带泥坪4个微相,与其他取心井段(或未取心井段)岩屑录井的对比符合率较高;该区志留系塔塔埃尔塔格组(下砂岩段)主要物源来自西北方向,次要物源来自东北方向。利用常规测井解释的岩性剖面、岩心刻度测井处理解释的沉积学倾角结果(沉积构造和古水流)和神经网络岩相处理解释成果,建立了塔中地区志留系关键井的测井沉积亚、微相解释模型。该模型为工区关键井垂向旋回叠置关系和沉积体系的空间展布特征研究提供了连续的、较准确的岩相剖面,对于海陆过渡相的层序划分对比和在塔里木盆地寻找隐蔽油气藏亦有一定的借鉴作用。

 
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