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目前,探区斜井比竖井多,且在斜井中能容易地获得井中地震剖面。 在试图联合地面地震和井中地震时,这些较新的实验要求修改所采用的标准地震方法。 在斜井中,虽然声波测井能精确定位声波边界,但仍无法产生表示走时与声波测井之间差异的雾飘曲线。这些声波边界作为走时反演中的输入参数,能产生非常准确的层速度。 在井中或其周围,为了观测地震波传播,井中地震是最直接的方法。当试图联合地面地震和井中地震时,了解地震波的传播现象是很重要的。 经验表明,不论使用的是何种震源,用下行子波包括所有的浅层反射在内的井中地震反射波进行反褶积是极为有效的。即使在高度倾斜的井中,也是这样的。因此,产生一个或多个参考道或多段参考道是可能的。通过使用这些参考道,来检验地面地震资料的处理质量,并能准确地将多种地震波与在井中观测到的声阻抗比差联系在一起。
At present, there are more deviations in the exploration area than in the shaft, and in-well seismic sections can easily be obtained in the deviated wells. These newer experiments require modification of the standard seismic methods used in attempting to combine ground and well-bore earthquakes. In skewed wells, although sonic logging can pinpoint sonic boundaries, fog drift curves that represent differences between traveltimes and sonic logging can not be generated. These sonic boundaries act as input parameters in traveltime inversion and produce very accurate layer velocities. In or around wells, earthquakes in wells are the most direct way to observe the propagation of seismic waves. When trying to combine ground-based earthquakes and earthquakes, it is important to understand the propagation of seismic waves. Experience has shown that it is very effective to deconviate seismic reflection waves in wells with all the shallow reflections, including the downlink wavelets, regardless of the source used. This is true even in highly inclined wells. Therefore, it is possible to generate one or more reference tracks or multiple reference tracks. These reference paths are used to verify the quality of ground seismic data processing and to accurately correlate the various seismic waves with the observed acoustic impedance ratio differences in the well.