沙漠覆盖区的低幅度构造研究

STUDY ON LOWEXTENT STRUCTURES IN DESERT COVER AREA.

沙漠地震勘探受长波长静校正量影响及地震野外采集时间跨度长、采集、处理因素的改变，容易产生假构造或造成地震测线交点闭合差远大于真实有效圈闭的幅度，这给低幅度构造的识别及油气勘探带来较大风险。认为在认真分析长波长静校正及其它影响因素的基础上，用叠前深度偏移区域连片处理方法判别低幅度构造，再结合钻井，落实有效的低幅度构造。

Effected by static correction magnitude of long wavelength seismic data, long seismic data acquisition time in field and data acquisition and processing, pseudostructure was easy to be interpreted in desert seismic exploration, or closure difference of intersection point of seismic survey line far exceeds the scope of real effective trap. So it is different to identify lowextent structures in seismic profile and greater risk was resulted in seismic exploration. This paper suggested that based on careful analysis of static correction of long wavelength and other factors, lowextent structures are identified with prestack depthmigration and regional seismic data processing method, combining with drilling data, commercial petroleum reserves and better economic benefit can be obtained.