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long offset
相关语句
  长偏移距
     Long offset transient electromagnetics(LOTEM)is characterized by the fact that the distance between transmitter and receiver is equal to or longer than exploration depth.
     长偏移距瞬变电磁法(LOTEM)的特点是发射器与接收器之间的距离大于或等于勘探深度。
短句来源
     The graben topography is designed to study the influence on the Long Offset Transient Electromagnetic (LOTEM). The effects of the graben topography to the LOTEM responses are detailedly discussed in this paper. It shows that the graben topography has significant influence for all the simulated models whatever the location of source in the graben topography.
     以地堑地形为代表讨论了地堑地形对长偏移距瞬变电磁测深法 (LOTEM)的影响 ,考察了把电偶极子源放在其中不同位置时引起的瞬变电磁响应 ,数值模拟结果表明 ,当把源放在地堑中不同位置时 ,对LOTEM产生的影响程度也不同 ,其中以源放在地堑下坡处影响最大 ,放在上坡处影响最小 ,放在中间 (台地 )的影响介于其间。
短句来源
     The paper presents the trial method and results with Long offset & window Transient Electromagnetic Method (LoTEM) to investigate detailed geological structure in the area covered with carbonatite.
     详述了长偏移距瞬变电磁测深法 (LoTEM )在碳酸盐岩地区进行局部构造落实的试验与效果。
短句来源
     Long offset transient electromagnetic sounding in West Germany
     在联邦德国沃格斯堡地区进行的长偏移距瞬变电磁测深
短句来源
     GRABEN TOPOGRAPHYIC EFFECTS TO THE LONG OFFSET TRANSIENT ELECTROMAGNETIC RESPONSES
     地堑地形对长偏移距瞬变电磁测深的影响研究
短句来源
更多       
  长偏移
     THE PROCESSING OF LONG OFFSET TRANSIENT ELECTROMAGNETIC DATA BASED ON WAVELET TRANSFORMATION
     基于小波变换的长偏移瞬变电磁数据处理
短句来源
  “long offset”译为未确定词的双语例句
     The quantitative calculation results for 4 three layered oil bearing sand models showed that the approximate formula can better approach the precise solution of Zoeppritz equation within 40°,and has better effect than the Aki's,so that is suitable for AVO parameter inversion of long offset data and theoretical study.
     对 4个三层含气砂岩模型的定量计算表明 ,该近似公式所得出的计算结果在入射角小于 4 0°时与由 Zoeppritz方程给出的精确解吻合得很好 ,甚至优于 Aki和 Richards公式的近似效果 ,很适合大入射角的 AVO参数反演和理论研究。
短句来源
     The paper analyzed different NMO methods for long offset seismic data by forward calculating horizontal layered medium model,considering that there is no such thing for NMO correction of long offset seismic data as that the higher the used order in polynomial fitting is,the better the precision of NMO correction is and that shifted hyperbola is not optimum everywhere.
     本文通过水平层状介质模型正演 ,对大炮检距地震资料进行动校正的方法进行比较分析 ,认为对大炮检距地震资料动校正时并不是用的阶数愈高 ,动校正的精度就愈好 ,并且平移双曲线法也不是时时最优。
短句来源
     In a condition of without considering influence of anisotropic medium temporarily,the coefficient of high order terms in polynomial is key factor having impact on NMO correction of long offset seismic data, determining what NMO method should be used in practical processing of long offset seismic data.
     在暂不考虑介质各向异性的影响下 ,多项式高次项系数是大炮检距动校正的关键影响因素 ,它决定实际处理大炮检距地震资料时应采用的动校正方法
短句来源
     This paper analyzes the application status of vertical seismic profile (VSP) technology, and introduces multiple cascade long offset VSP data acquisition technology and joint application of 3-D VSP and 3-D seismic.
     分析了VSP技术的应用现状,介绍了多级长排列VSP采集技术及三维VSP与三维地震联合作业的技术。
短句来源
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  long offset
These results will be applied to select areas for coring (or drilling) and detailed exploration such as 2D seismic survey with long offset or 3D seismic in the future.
      
Stage II of the scheme involves velocity filtering in the common-midpoint domain which is particularly effective at long offset where the moveout difference between primary reflections and reverberations is largest.
      
The AVO analyses on long offset P and PS waves based on synthetic data yield a typical gas hydrate/free-gas response, as the reflectivity increases with incidence angle.
      
In recent years, this problem appears to have been overcome partly by using long offset seismic data.
      
They are different from conventional ones in the following aspects: separation of reflection and refraction waves, long offset NMO and stacking and forward modeling and inversion.
      
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Jia Baocang:VSP processing technique,《OGP》,21(2)1986:169~180 On the basis of VSP principle,the offset VSP processing technique is developed which includes normal moveout correction,static correc- tion,compensation for amplitudes of upgoing and downgoing waves, the separation of upgoing and downgoing wavefields by the combination use of median filtering and 2-D filtering,and VSP—CDP conversion. This technique may be used to process not only the normal well VSP data(fixed long offset or varied offsets)but...

Jia Baocang:VSP processing technique,《OGP》,21(2)1986:169~180 On the basis of VSP principle,the offset VSP processing technique is developed which includes normal moveout correction,static correc- tion,compensation for amplitudes of upgoing and downgoing waves, the separation of upgoing and downgoing wavefields by the combination use of median filtering and 2-D filtering,and VSP—CDP conversion. This technique may be used to process not only the normal well VSP data(fixed long offset or varied offsets)but also the deviated well VSP data. Some new processing programs and some improved surface seismic data processing programs of CYBER 720 computer form this specific VSP processing package. The offset VSP data from two wells were processed,and the pro- cessing results prove the processing technique practical.The correlation between seismic reflections and geologic horizons around the well can be ascertained by integratively analysing the VSP processing results, logging data and surface seismic data.

贾保沧:垂直地震剖面处理方法,《石油地球物理勘探》,21(2)1986:169~180根据垂直地震剖面的基本原理,针对非零井源距(偏移距)观测资料,研究和制定出一套垂直地震剖面处理方法。主要处理过程包括:动校正和静校正;上行波、下行波球面扩散振幅补偿;中值滤波与二维滤波相结合分离上行、下行波场;垂直地震记录变换为共反射点叠加记录(VSP—CDP 变换)。该处理方法适合于比较复杂的非零井源距垂直地震测量资料处理,也适合处理直井或斜井观测资料。通过对赛伯720计算机现有一些地表地震处理软件作了改进,同时又新增加了一些软件,使上述处理方法已模块化。本文还介绍了实际处理的两口井的非零井源距观测资料,其结果表明所使用的处理手段是正确而实用的。利用处理结果,结合测井和地表地震资料,精细地分析了井周围地层与地震反射的对应关系。

The Deep Transient Electromagnetic (DTEM) or Long Offset Transient Electromagnetic (LOTEM) is an active electromagnetic measurement method. It is a very efficient exploration method for reaching large penetration depths of up to 10 km.The DTEM is very useful for hydrocarbon exploration in basins covered or inter-bedded by basalt, valcanic layers, salt and anhydrite.In comparison with other electromagnetic method, DTEM has the advantages of being less sensitive to lateral inhomogenities, having the best...

The Deep Transient Electromagnetic (DTEM) or Long Offset Transient Electromagnetic (LOTEM) is an active electromagnetic measurement method. It is a very efficient exploration method for reaching large penetration depths of up to 10 km.The DTEM is very useful for hydrocarbon exploration in basins covered or inter-bedded by basalt, valcanic layers, salt and anhydrite.In comparison with other electromagnetic method, DTEM has the advantages of being less sensitive to lateral inhomogenities, having the best coupling to the subsoil and measuring in the absence of primary field.This paper provides a briefly summarization of principles and of theory for the DTEM, the technical system in the field, and the data processing and interpretation.

瞬变电磁测深法是一种人工源的电磁方法,适用于寻找火山岩覆盖区以及逆掩推覆体下部的含油气构造、圈定碳酸盐岩地区的低阻和中等电阻的沉积岩系构造。与其它电磁方法比较,有抗干扰能力强、信噪比高、受横向不均匀性的影响小等优点。本文简述了该方法的物理原理、野外测量技术、数据处理及其解释方法。

Long offset transient electromagnetics(LOTEM)is characterized by the fact that the distance between transmitter and receiver is equal to or longer than exploration depth.The grounded dipole transmitter emits square-wave current into the earth.The current step induces eddy current in underground.The receiver records secondary magnetic field generated by eddy current.The recorded signals are processed in the way similar to seismic data processing,thus we obtain the infor- mations about distribution of underground...

Long offset transient electromagnetics(LOTEM)is characterized by the fact that the distance between transmitter and receiver is equal to or longer than exploration depth.The grounded dipole transmitter emits square-wave current into the earth.The current step induces eddy current in underground.The receiver records secondary magnetic field generated by eddy current.The recorded signals are processed in the way similar to seismic data processing,thus we obtain the infor- mations about distribution of underground resistivity. LOTEM test survey was done in West Germany.The processed L8803 profile shows the variation of resistivity of formations under- lying an igneous body.Tests show that LOTEM is helpful to resolv- ing some special exploration problems,for example,discovering the strueture that underlies an igneous body.

长偏移距瞬变电磁法(LOTEM)的特点是发射器与接收器之间的距离大于或等于勘探深度。接地的偶极发射器向地下发射方波电流,阶跃变化的电流在地层中感生出涡流。在接收点接收并记录涡流产生的二次场。对记录的信号进行与地震数据类似的数字处理,从而得到有关地层电阻率分布的信息。在联邦德国沃格斯堡地区进行了 LOTEM 试验,由处理完成的 L8803剖面得到了被火成岩覆盖的下伏地层的电阻率变化情况。试验表明,瞬变电磁法有助于解决一些特殊勘探问题,如寻找火成岩覆盖下的构造等。

 
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