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wave impedance difference
相关语句
  波阻抗差
     A scattered wave field is a function of the incident wave field and the wave impedance difference function.
     散射波场是入射波场与波阻抗差函数的函数。
短句来源
     Under such a pattern, one can get the estimation of the scattered wave field by extracting the incident wave field by shot records and calculating the wave impedance difference function by least square algorithm.
     在这样的模式下 ,由炮集记录提取入射波场 ,进而通过最小二乘法 ,求解波阻抗差函数 ,最终得到散射波场的估计。
短句来源
     On basis of this, from the wave theory, one can build a surface propagating and scattering model and set a function of wave impedance difference on every node of grid surface paralleling surface to approximate the surface nonhomogeneity .
     由波动理论建立近地表传播和散射模型 ,并在平行地表的一个网格面的各个节点上设置波阻抗差函数来近似地表的非均匀性。
短句来源
     Medium has effective wave impedance difference and resistivity difference are preface of applying transient rayleigh wave and high density electrical propecting method.
     介质有较明显波阻抗差和介质存在电阻率差异分别是应用瞬态瑞雷面波法和高密度电法的地球物理前提。
短句来源
     In this region,while the wave impedance of gas-bearing sandbody is smaller than its up-and-down sourrounding rocks,the reflection of its top-and-bottom interfaces shows the characteristics as a negative at top and a positive at bottom,relatively low (apparent) frequency and relatively strong amplitude,i. e,the larger the wave impedance difference between the gas-bearing sandbody and its overlying formation,the stronger the amplitude of reflection wave trough;
     在区内当含气砂体的波阻抗小于其上下围岩 ,其顶底界面的反射呈上负下正、(视 )频率较低、振幅较强的特征 ,即含气砂体与上覆地层的波阻抗差越大 ,则反射波波谷的振幅越强 ;
短句来源
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  波阻抗差异
     Erdos basin is our country gas reserves most areas and our country transport the natural gas from the west to the east most powerful production base, Has the reservoir wave impedance difference to be small but the cap rock to clamp the strong reflection coal bed and so on not to favor the seismic exploration the characteristic.
     鄂尔多斯盆地是我国天然气储量最多的地区和我国西气东输的最强有力生产基地, 具有储层波阻抗差异小而盖层夹强反射煤层等不利于地震勘探的特点。
短句来源
     Propagation of sonic wave and results of ultrasonic imaging logging are affected, in some degree, by these factors, such as working frequency, types of transducers, measuring distances, scanning intervals, tool eccentricity and slope, interface wave impedance difference, etc.
     换能器的工作频率及类型、测量距离、扫描间隔、仪器偏心及倾斜、目的层的波阻抗差异等因素都会不同程度地影响声波的传播 ,最终影响成像效果。
短句来源
     Mabei oilfield in Junggar basin is characterized by favourable geologicalconditions such as thicker oil sand members, great wave impedance difference betweenreservoir and caprock, simple structure, higher quality of logging and 3-D seismic data,providing with the base for transverse prediction of reservoir.
     准噶尔盆地玛北油田具有含油砂组厚度较大、储层与盖层间波阻抗差异大、构造简单等有利地质条件,且测井与三维地震资料质量较好,具备地震储层横向预测的基础。
短句来源
     With the reflect coefficient K deduced from the theory of stress wave one-dimension linear bar, this paper presents wave impedance difference of complicated layers. On this base, this paper analyses the disturbance of complicated layers to pile examination and its reflect wave curve features. A consistency between theory analysis and practice is proved by engineering example.
     复杂地质条件是反射波法判断基桩质量缺陷的主要干扰因素之一 ,利用一维线性杆状体理论推导得到反射系数K ,提出了复杂地质条件下不同地层的波阻抗差异 ,在此基础上分析了复杂地层对基桩检测的干扰及其反射波的曲线特征 ,并通过工程实例证明理论分析的曲线特征与实测结果的一致性
短句来源
     Sedimentary micro-facies reservoirs are mainly composed of delta front sill-like sand,delta front distributary channel sand,estuarine sand bar,and sublacustrine fan sand. The reservoirs typically show low wave impedance and large wave impedance difference with surrounding rocks.
     储层沉积微相以三角洲前缘毯状砂体、三角洲前缘分流河道砂体、河口坝砂体和湖底扇砂体等为主,储层地球物理特性通常表现为低波阻抗特征,与围岩具有良好的波阻抗差异
短句来源
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  “wave impedance difference”译为未确定词的双语例句
     (3)the velocity of gas-bearing sandstone approaches to that of mudstone (small wave impedance difference between gas-bearing sandstone and mudstone).
     ③含气砂岩与泥岩速度相近(含气砂岩与泥岩间的波阻抗差值小)。
短句来源
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Mabei oilfield in Junggar basin is characterized by favourable geologicalconditions such as thicker oil sand members, great wave impedance difference betweenreservoir and caprock, simple structure, higher quality of logging and 3-D seismic data,providing with the base for transverse prediction of reservoir. This panier predicted theporosity of major oil layer formation in Mabei oilfield by using few key well data, strati-graphic correlation, picking up of amplitude, matching step by step, restriction of...

Mabei oilfield in Junggar basin is characterized by favourable geologicalconditions such as thicker oil sand members, great wave impedance difference betweenreservoir and caprock, simple structure, higher quality of logging and 3-D seismic data,providing with the base for transverse prediction of reservoir. This panier predicted theporosity of major oil layer formation in Mabei oilfield by using few key well data, strati-graphic correlation, picking up of amplitude, matching step by step, restriction of She-crikin and reflection coefficient, conversion of porosity in different intervals , and better re-sult is obtained.

准噶尔盆地玛北油田具有含油砂组厚度较大、储层与盖层间波阻抗差异大、构造简单等有利地质条件,且测井与三维地震资料质量较好,具备地震储层横向预测的基础。因此利用少量关键井资料通过地质含义标定、振幅提取、逐步拟合、协克里金与反射系数约束、分区间孔隙度转换等步骤,对玛北油田主力油组的孔隙度进行了预测。后续探井资料表明,沿层振幅进行孔隙度预测方法简便,效果较好。

Based on the propagation theory of the longitudinal wave in the pile, the present paper presents a technique for determining such parameters as back and forth time of reflection wave and apparent reflection coefficient. After some correction of the apparent reflection coefficient, the extent of wave impedance differences of the reflection interfaces can be analysed quantitatively and, on such a basis, the defective position of the pile body can be detected.

本文以纵波在杆中传播的理论为根据 ,介绍一种用于确定反射波往返时及视反射系数等参数的方法。将视反射系数经过一定的校正后 ,可定量分析反射界面的波阻抗差异的大小 ,进而确定桩身缺陷的严重程度 ;反射波往返时则用来推算桩身缺陷的位置

Sichuan Basin has become an important natural gas industry base through an exploration and development for few tens of years and the major oil and gas producing strata are composed of carbonate rocks.By carrying out mountainous area seismic exploration for carbonate reservoirs in Sichuan Basin,abundant achievements have been obtained and many difficulties have been encountered also.These difficulties may be summarized as the following five aspects:①being difficult of seismic data acquisition in exposed carbonate...

Sichuan Basin has become an important natural gas industry base through an exploration and development for few tens of years and the major oil and gas producing strata are composed of carbonate rocks.By carrying out mountainous area seismic exploration for carbonate reservoirs in Sichuan Basin,abundant achievements have been obtained and many difficulties have been encountered also.These difficulties may be summarized as the following five aspects:①being difficult of seismic data acquisition in exposed carbonate rock areas;②being difficult of imaging by reflection at the interfaces of thin carbonate formations and the reservoir beds with little wave impedance differences;③being difficult of laterally forecasting the change of carbonate reservoir beds;④being difficult of forecasting special reservoir bodies;and ⑤ being difficult of distinguishing the oil ,gas and water bearing layers in carbonate reservoirs.In the paper,the reasons of forming these difficulties are analyzed;some thoughts of solving these technical difficulties are proposed;and the relevant theoretic research,deepening high steep structures exploration and field data acquisition,seismic data processing techniques,the development,application and popularization of new techniques and new methods,a synthetic application of multiple disciplines and multiple techniques and enhancing exploration success ratio,etc.,are discussed.

四川盆地经过几十年勘探、开发已成为重要的天然气工业基地 ,碳酸盐岩地层为主要油、气产层。在四川山区针对碳酸盐岩储层开展地震勘探取得丰富成果 ,但也面临诸多技术难点。将其归纳为五点 :①碳酸盐岩出露区地震资料采集难 ;②薄碳酸盐岩地层及波阻抗差微弱的储层界面反射成像难 ;③碳酸盐岩储层横向预测难 ;④特殊油气储集体预测难 ;⑤碳酸盐岩储层含油、气、水判别难。文章分析了这些难点形成的原因 ;提出了解决技术难点的思路 ;讨论了关于理论研究 ;高陡构造深化勘探及野外资料采集 ;地震资料处理技术 ;新技术、新方法的研制、应用和推广 ;多学科、多工种资料的综合应用以及提高勘探成功率等问题。

 
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