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   重力测量 在 石油天然气工业 分类中 的翻译结果: 查询用时:0.537秒
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重力测量
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    odified normalized full gradient De method is applied to process high precision gravity data of DB area in the Shengli oilfield.
    应用改进的重力归一化总梯度法(GH法)对胜利油田DB区的高精度重力测量资料进行了处理。
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  gravity survey
In mountainous area, gravity survey external corrections, including terrain and Bouguer corrections, are the prerequisites for gravity data processing and interpretation.
      
We carried out a high precision gravity survey in the SHJZ structural zone.
      
In this paper we have analyzed precise gravity survey and gravity effects resulted from water loading, crustal deformation, ground water level change and precipitation before and after the water impoundment in the Three Gorges Reservoir.
      
It appears that a combination of both systems would provide an ideal airborne gravity survey system, combining the excellent bias stability of the LCR gravimeter with the higher dynamic range and increased spatial resolution of the strapdown INS.
      
As an example, we estimate the gravity values along the flight-lines from an airborne gravity survey over the Alps and introduce an a priori covariance matrix of the gravity disturbances from a global geopotential model.
      
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Abstract

随着仪器精度的提高、计算机技术的发展和正反演方法的完善,使重、磁这一经典方法在石油勘查中得以广泛应用。利用重、磁方法不仅可以研究与找油有关的基底结构、构造、断裂等地质问题,而且可以直接研究油气藏。高精度重力测量能够通过研究油水之间密度差来找油。密度、磁性界面的反演方法的完善,可使定量解释结果具有较高的精度。本文最后列举了若干应用实例。

odified normalized full gradient De method is applied to process high precision gravity data of DB area in the Shengli oilfield. The three dimensional distribution of normalized full gradient of Bouguer gravity is computed by this method. The closed minima on GH contour map at a depth reflect occurrence and location of the density deficiency or oil reservoir. The number of closed minima of a GH contour map at a depth versus the depth approximately reflects the locanon where the density deficiency occurs. The...

odified normalized full gradient De method is applied to process high precision gravity data of DB area in the Shengli oilfield. The three dimensional distribution of normalized full gradient of Bouguer gravity is computed by this method. The closed minima on GH contour map at a depth reflect occurrence and location of the density deficiency or oil reservoir. The number of closed minima of a GH contour map at a depth versus the depth approximately reflects the locanon where the density deficiency occurs. The GH contour map can be used to choose the direction in which the cross section extends. The closed minima on the cross section map show the shape of the density deficiency and can be used to estimate the depth to the reservoir. Comparison of 3-D distribution of normalized full gradient of gravity anomaly with drilling data shows that the locations of the closed minima on the normalized full gradient contour maps basically coincide with those of the known hydrocarbon accumulation.

应用改进的重力归一化总梯度法(GH法)对胜利油田DB区的高精度重力测量资料进行了处理。计算了GH值在地下的三维分布。某一深度GH平面等值线图中的闭合极小值(GH低)反映了低密度体的存在及其水平位置,而不同深度等值线图中GH低的数目的变化可以近似表示低密度体集中的深度范围。GH平面等值线图还可以为选择GH铅垂断面图的方向提供依据。GH铅垂断面等值线图中的闭合极小值更清楚地显示出低密度体的形态及其近似深度。计算出的GH值的三维分布与钻井资料的比较表明,GH的闭合极小值与已知油气藏在位置上有较明显的相关关系。

 
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