混合震源高精度匹配处理技术在中国西部复杂障碍区的应用

一些地表复杂工区既有适用于炸药震源施工的山地、沙漠区,又有村庄、城镇、工业园、江河、水库等"禁炮区",虽能通过观测系统变观技术实现对"禁炮区"的整体覆盖,但由于缺失浅层或近炮检距信息,会对近地表速度模型反演、速度分析、水平叠加和偏移成像等产生较大影响,因此应采取炸药震源与可控震源混合采集处理,而混合震源采集的各种地震炮...

Research and application of mixed sources high-precision matching processing technology in the complex obstacle area in western China

In some areas with complicated surface conditions, such as mountain, town, and reservoir nature reserves. Dynamite is prohibited in seismic acquisition. Although a variable recording system can provide full coverage on the prohibited zone, without shallow or near-offset data, great impacts may occur on near-surface velocity model inversion, velocity analysis and imaging. Therefore, it is necessary to use matching process technology in the seismic data which acquisited by dynamite combinate with vibroseis. However, the wavelets, amplitudes, frequency and phases of shots by mixed sources are inconsistent, which could cause illusion of fine interpretation. This paper proposes a high-precision matching processing method which can overcome the shortcomings of conventional matching filtering processing methods, which don't consider the influence of noise and the signal-to-noise ratio. This method removes the inconsistency of the data collected by using mixed sources, eliminates the differences caused by different shooting methods, and improves the S/N ratio and imaging quality of seismic data. Actual processing results show that the high-precision matching processing method with mixed sources is effective to remove data inconsistency and can be applied to merged seismic data processing.