高陡逆掩构造带的地震处理及解释技术

SEISMIC DATA PROCESS AND INTERPRETATION TECHNIQUES FOR STEEP OVERTHRUST BELT

高陡逆掩构造带由于构造复杂,静校正、低信噪比和正确成像归位等成为影响地震勘探效果的关键技术,特别是正确成像技术牵涉到速度场的研究和叠前深度偏移技术。通过对高陡基准面选择、静校正技术、提高数据信噪比的技术与方法、高陡构造垂向变异模型的建立、高陡构造物理模式的建立、和高陡构造偏移方法及偏移处理技术等方面的概述,阐述了这些技术和方法在高陡逆掩构造带的地震处理及解释中的应用,对高陡逆掩构造带的勘探具有借鉴作用。

Static correction, signal-to-noise ratio and imaging homing are the key factors that affect the seismic exploration results of steep overthrust belt. Proper imaging is especially important because it concerns velocity field study and pre-stack depth migration. In this paper, the selection of steep datum level, static correction, methods to improve signal-to-noise ratio and migration methods for steep structures etc are summed up. The application of these techniques and methods in seismic data process and interpretation is introduced, which is helpful in the exploration of steep overthrust belt.