空变V0的折射波静校正技术应用

Spatial variation V_0 refraction wave static correction technique and its application.

在中国西部地区的油气勘探中,由于近地表地震和地质条件极为复杂,地形起伏较大,近地表岩性、低降速带速度和厚度横向变化剧烈,静校正尤其是长波长静校正问题尤为突出。本文针对复杂地表区存在的静校正问题,应用折射波静校正技术,结合野外微测井资料,尝试空变V0的计算方法,使得成像效果得到较大的改善,基本解决了目标区的静校正问题,取得了很好的应用效果。

In oil & gas exploration in western China, static correction, especially long wave length static correction is always a big problem due to the complex near-surface geological & geophysical conditions, the rugged terrain, the large lateral variation in near-surface lithology, velocity and thickness of weathered and sub-weathered zone. Regarding the static correction problem in complex near-surface terrain, refraction wave static correction technique was used along with field uphole survey data and spatial variation V0 algorithm, as a result the imaging results were greatly improved, the static correction problem resolved, and the excellent processing results achieved.