折射静校正在苏里格气田三维处理中的应用

Application of refraction statics in 3-D data processing in Sulige gas field

1. Chengdu University of Technology, Chengdu 610059, China;2. Data Processing Center of Geophysical Research Institute, CNPC Bureau of Geophysical Prospecting, Zhuozhou 072750, China

长庆油田苏里格气田所在地区, 地表为小沙丘, 高差不大。该区近地表存在一条深达80m的古河道, 河道中已冲填了流沙, 造成近地表局部低速层的厚度发生了巨大变化, 引起地震剖面上严重的长、短波长静校正问题。在处理中, 利用本区域折射初至比较清楚的特点, 应用三维折射静校正技术。

Sandy hillocks with small height difference dot in Sulige gas field area, Changqing oilfield. Because an ancient river course of 80m thick filled with sand passes across the area, the thickness of weathering layer changes greatly, leading to serious problems of statics. On account of clear first refraction arrival in this area, 3-D refraction techniques are adopted in data processing. The serious problems of long wavelength and short wavelength statics are solved satisfactorily.