摘要
通过对变速成图中速度进行分析,结合研究区勘探实践,针对该地区的实际地质特点及构造特点,研究出一套针对山前带复杂构造区变速成图的方法:应用叠加速度谱资料建立初步速度场;利用临近井统计,建立区域大层段的地层平均速度,虚拟多口井位,进行初步速度场的校正,提高速度精度;再利用层位、钻井的结合,进行速度场横、纵向约束,提高横、纵向的合理性。有效地提高了速度场建立和变速成图的精度,解决了研究区构造成图问题。
Based on analyzing the speed of varying velocity mapping and combined with the actual geological and the structural features of the study area, a method on the varying-- velocity mapping of the complex structure region in the front--zone of mountains is stud- ied. The stack velocity spectrum is applied to setting up the initial velocity field and the ad- jacent well statistics is used to set up the stratum average velocity of the reginal big layer and the virtual multi--wells. The correction of velocity field is preliminarily made to im- prove the velocity accuracy. Then the layer and drilling are combined to restrain horizontal and vertical of the velocity field, which efficiently improves the establishment of the veloci- ty field and the accuracy of the varying--velocity mapping and solves the problem of struc- tural mapping of the study area.
出处
《工程地球物理学报》
2013年第6期880-884,共5页
Chinese Journal of Engineering Geophysics
关键词
变速成图
山前带
叠加速度谱
速度场
varying-- velocity mapping
front-- zone of mountains
the stack velocity
ve- locity field
