层析静校正在黄土塬弯宽线资料处理中的应用

Application of tomostatics in data processing from crooked wide line geometry in Loess Tableland

（中国石油化工股份有限公司石油勘探开发研究院南京石油物探研究所，江苏南京210014）

Institute of Geophysical Prospecting, SINOPEC Research Institute of Petroleum Exploration and Development, Nanjing 210014, China

常规层析静校正技术用于黄土塬地区弯宽线资料处理难以达到合理的精度。为此，在假设垂直测线方向上表层速度是随地形起伏的稳定速度结构的情况下，引入“广义速度单元”概念，对三维层析静校正速度反演过程加以改进，使其适合宽、弯线资料观测系统。将采用广义速度单元策略的层析静校正技术用于实际资料处理，并将结果与某处理系统的层析静校正处理结果进行了比较，结果表明这种处理方法是可行的。

Conventional tomostatics cannot reach the reasonable accuracy in processing the data from crooked wide line geometry in Loess Tableland. Therefore, the ‘generalized velocity unit’ was introduced on the assumption that the surface velocity in the direction perpendicular to the line is a steady velocity frame with the topographic relief. The 3-D tomostatics velocity inversion was improved to suit the crooked wide line geometry. The tomostatics technology of the ‘generalized velocity unit’ was applied to actual data processing, and the result was compared to the result obtained from a certain processing system, showing that this method is feasible.