煤田三维地震勘探中横向覆盖次数的确定及宽方位数据采集的设想
DETERMINATION OF LATERAL COVERING TIMES AND ASSUMPTION OF BROAD AZIMUTHAL DATA ACQUISITION IN 3D COAL FIELD EXPLORATION
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摘要: 提出了线束型三维观测系统横向覆盖次数的一种简易确定方法,详细论述了非纵误差的实质及纵测线方向的选择方法,根据目前煤田三维数据采集现状,提出了宽方位角的设想,以便克服以往三维观测系统中方位角分布不均的弊端。Abstract: An easy method for determining the lateral fold number of 3-D seismic swath is presented.It is described in details that the non vertical time error and selection method of vertical line direction.Based on existing conditions of 3-D seismic data acquisition in coal field,an assumption of 3-D broad azimuth data acquisition is provided to remove the disadvantages of non uniform azimuth distributions from old observation system.