关键词: 气枪阵列设计, 立体气枪阵列, 非常规气枪阵列设计, 气枪阵列震源应用

Abstract:

ased on the simulation method of marine air-gun seismic source wavelet and through a large number of seismic source wavelet simulation calculations for marine multi-subarray under different air-gun array combinations, three-dimensional multi-sub-arrays and two unconventional air-gun arrays (i.e., put the high-capacity air-gun in the middle position or arrange it in staggered form in air-gun array) that are applicable for deep-water seismic exploration are proposed in this paper. The simulated wavelet is characterized by the strong low-frequency energy, large P/B ratio and strong spectrum energy at notch points. Furthermore, we apply the optimized air-gun arrays of three-dimensional four-array combination and six-subarray unconventional array combination to different exploration targets to conduct field seismic acquisition tests. Test results show that the proposed optimized array combination designs have good application results: they can significantly improve the performance of wavelet, so that the quality of seismic sections acquired is significantly improved, reflection characteristics of deep stratum are obvious and the basin structure and strata filling characteristics are clearly shown.

Key words: air-gun array design, three-dimensional air-gun array, unconventional air-gun array design, air-gun array seismic source application