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三维地震法是一种取得和表达地震资料的与常用不同的方法。三维资料不是在剖而线以下来显示,而是将地震上能加以确定的自浅至深的反射层以一种面积图表达出来。野外工作采用相交排列,在每个反射面上将有2000多个均匀分布的深度点。相交排列容许有所变化,可以在野外既得到相同的地下界面覆盖又有取得资料的方便性。由于此法能达到密集覆盖,因此最适合于解决需要最详细研究的问题,例如开发中的一些问题。三维地震资料的通常表达方式,是在4平方哩面积上出现的波前的可见的活动图示,据此能求出到达每一反射面的平均速度以及倾角大小。已经证明这个方法对识辨断层和确定断层的方向特別有用。
Three-dimensional seismic method is a commonly used method to acquire and express seismic data. The 3D data are not shown below the cut line but rather as an area chart of the depth-to-depth reflector that can be determined on earthquakes. Fieldwork is arranged in an intersecting arrangement with more than 2,000 points of depth evenly distributed on each reflecting surface. The permutations and permutations are subject to change so that both the same underground interface coverage and the accessibility of information can be obtained in the field. Because of its dense coverage, this method is best suited to solve problems that require the most detailed study, such as some issues under development. The usual way of expressing 3D seismic data is to show the visible wave front of a 4-square-mile area, from which the average velocity and angle of dip to each reflector can be calculated. This method has proven to be particularly useful in identifying faults and determining the direction of faults.