海上拖缆宽方位多源地震采集枪阵设计与应用

Design and Application of Air-gun in Stream Wide Azimuth Multi-source Seismic Acquisition

针对海上拖缆宽方位多源地震资料采集对震源的要求,以及现有设备条件的限制,开展了枪阵设计关键技术的研究。在不同枪架和不同容量枪的条件下,通过对大量不同气枪阵列组合震源开展地震子波模拟分析,设计出了不同组合容量的枪阵震源激发得到地震子波特征相同、能量一致的气枪阵列震源组合。将针对不同枪架和配件的枪控设计出的震源阵列组合应用到宽方位多源地震采集项目中,所采集到的实际地震资料的能量和频谱达到预期设计目标,表明所设计的震源阵列符合海上拖缆宽方位多源地震资料采集的要求。

Aiming at the requirement of multi-source seismic acquisition and the limitation of existing equipment,the key technology of gun array design is studied.Under the condition of different gun frame and gun volume,we simulated and analyzed the wavelet by a large number of different air-gun array,therefore different volume of gun array sources were designed which stimulated various combinations of air-gun with the same wavelet characters and consistent energy.The combinations of source arrays designed for dif-ferent gun holders and accessories are applied to the wide azimuth multi-source seismic acquisition project.The energy and spectrum of the actual seismic data collected reach the expected goal,which shows that the designed source array meets the requirements of wide-azimuth multi-source seismic data acquisition.