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  exploration practice
In the 1980s, on the basis of the development in exploration practice, the hypotheses of bio-thermo-catalytic transitional zone gases and early thermogenic gases were proposed.
      
  exploration practices
All areas in the NE Atlantic are coming under threat from increased fishing and commercial exploration practices.
      
While relatively few places in Alberta's boreal forest have local seismic line densities of 8.5?km/km2, forest dissection could increasingly become an issue if current energy exploration practices continue.
      


The subject is treated on the basis of field experiences and large amount of geochemical data. It is proposed that (1) the content and distribution of organic matter in continental source rocks are something related to the types of lake sediments deposited, generally expressed by the presence of organic carbon, chloroform extract asphalt "A" and hydrocarbons content (2) From the study of the types of organic matter by means of chromatogram, infrared spectrum, chromatogrammass spectrogram, it has been found that...

The subject is treated on the basis of field experiences and large amount of geochemical data. It is proposed that (1) the content and distribution of organic matter in continental source rocks are something related to the types of lake sediments deposited, generally expressed by the presence of organic carbon, chloroform extract asphalt "A" and hydrocarbons content (2) From the study of the types of organic matter by means of chromatogram, infrared spectrum, chromatogrammass spectrogram, it has been found that in addition to the above, sedimentary facies zone also plays a part and that the source rocks contain kerogen of many types. ( 3 ) According to the genetic relationship between soluble and insoluble organic matter in the source rocks, coupled with data of kerogen, organic matter in continental source rocks is classified into 5 types: the sapropel type, the humus-sapropel type, the sapropel-humus type, the humus type and kerogen coal.

本文依据陆相石油勘探实践及大量的地球化学分析资料,对陆相生油岩有机质的丰度及类型进行了探讨。研究认为:1.陆相生油岩有机质含量及分布与湖相沉积类型和相带有关。一般采用有机碳、氯仿沥青“A”及烃含量来表示。2.应用色谱、红外、元素、色谱—质谱联用技术、扫描电子显微镜等分析资料,研究了有机质类型认为:陆相生油岩类型及分布受沉积相带的控制。其母质类型除腐殖型外,还发育了大量腐泥型等多类型生油岩。3.依据生油岩中可溶与不溶有机质成因联系,将可溶有机质视为整体有机质的一个“碎片”,结合干酪根等资料,将陆相生油岩有机质类型划分为五种类型即:腐泥型、腐殖-腐泥型、腐泥-腐殖型、腐殖型和腐煤型。

China started its oil electric survey in 1952. The number of electric survey crews reached 36 by the end of 1950's. Because the main prospects changed from the Northwest to the East of China in early 1960's, and later affected by the "culture revolution", the electric survey crews greatly decreased in number and many crew members Changed their profession. 5 electric survey crews were reestablished at the beginning of 1970's. The crews conducted not only conventional electric prospecting but also the experiment...

China started its oil electric survey in 1952. The number of electric survey crews reached 36 by the end of 1950's. Because the main prospects changed from the Northwest to the East of China in early 1960's, and later affected by the "culture revolution", the electric survey crews greatly decreased in number and many crew members Changed their profession. 5 electric survey crews were reestablished at the beginning of 1970's. The crews conducted not only conventional electric prospecting but also the experiment of direct detecting oil. The electric surveyors have studied certain applied theory of electric prospecting and therefore developed a complete set of digital processing programs. We can see from the 30 years'practice that electric survey still plays an important role in making areal reconnaissance, locating local rise of high resistance beds and researching into electric fault plane under specific condition. It is suggested that magnetotelluric sounding, artificial electric field sounding and other electric prospecting methods should be actively developed, and their comprehensive applications emphasized.

我国于一九五二年始,开展了石油电法勘探工作,五十年代末,石油电法队发展到36个。六十年代初,随着石油勘探重点由西北转向东部沿海,以及后来“文革”的影响,电法队大批的压缩和转业。七十年代初重新集结了五个电法队,不仅继续从事石油电法勘探工作,而且还开展了直接找油的试验工作。这一期间还就电法勘探的某些应用理论进行了深入研究,建立了一整套数字处理程序。从三十年来的电法勘探实践可以看到,电法勘探在区域普查、查明局部高阻层隆起以及在特殊条件下对电性断面的研究等方面,仍然能起到重要的作用。今后,要积极发展和研究大地电磁测深、建场测深等其他电勘探方法,加强这些方法的综合应用。

The polygenetic compound ore deposits proposed by professor ChenCuoda have the features of multi metallogenetic stages, various ore sources and Polygenetic types. This new viewpoint has an important practical value to mineral exploration in east Hubei, Based on abundant data accumulated from geological prospecting, the author dis cussed the geological features of the Carboniferous polygenetic compound ore deposits in-east Hubei. Three genetic types have been distinguished: the sedimentary-thermal brine solatlon...

The polygenetic compound ore deposits proposed by professor ChenCuoda have the features of multi metallogenetic stages, various ore sources and Polygenetic types. This new viewpoint has an important practical value to mineral exploration in east Hubei, Based on abundant data accumulated from geological prospecting, the author dis cussed the geological features of the Carboniferous polygenetic compound ore deposits in-east Hubei. Three genetic types have been distinguished: the sedimentary-thermal brine solatlon transformation type, the volcanic sedimentary-magmatic fluid transformation type and the sedimentary-structural transformation type. Finally from the litho logy, facies, position and themetallogenetic model the direction for mineral exploration has been probed.

陈国达教授提出的多因复成矿床,具有多成矿阶段,多物质来源,以及多成因类型的“三多”特点。这一新观点对指导鄂东找矿勘探实践有重要意义。本文根据鄂东地质勘探积累的大量资科,探讨了鄂东石炭系层位的多因复成矿床的地质特征,指出了沉积-热卤水改造、火山沉积-岩浆热液改造和沉积-构造改造等三个成因类型。最后,从层、相、位和“多位一体”的成矿模式探索了找矿方向。

 
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