复杂地表区基准面和静校正方法的选择

Adoption of datum planes and statics methods in complex surface areas

Geophysical institute, Research Institute of Petroleum Exploration and Development, Xinjiang Petroleum Exploration Company, Urumchi 830011, China

基于模型观测, 用水平的和浮动的 4种基准面计算静校正值, 分别用两步法和一步法作静校正, 研究复杂地表结构条件下各种基准面和静校正方法的校正精度。试验结果表明, 采用水平基准面两步法静校正, 时间剖面反演深度误差最小; 当基准面远离地表时, 水平基准面一步法静校正也会产生较大的误差。

The precision of different datum planes and statics methods was investigated on model measurements for complex subsurface. Statics quantity was calculated with horizontal and 4 floating datum planes and statics was carried out with two-pass and one-pass methods. The results were as follows. The horizontal datum and two-pass statics method gave minimum depth error on time section. As the datum goes away from the earth surface, the error generated by the horizontal datum and one-pass statics method increased. For non-horizontal datum two-pass statics method or one-pass static method, the depth error increased with the undulation of the datum, sometimes even leading to fake structures.