【摘要】 通过分析研究8L4S176T正交束线观测系统及其在复杂滩浅海区域施工时对接收设备、震源激发、二次定位和采集方法的要求,论证了该观测系统对于实现以提高中深层复杂构造成像精度和分辨率、衰减采集脚印为目的的地震采集在复杂海底应用的可行性。正交观测系统横向一次只滚动一个排列,有效避免了采集脚印的产生;根据不同水深采用不同的激发和接收方式,提高了轻型海底电缆地震资料的品质;声学定位、沿检波线激发等措施保障了采集效率。实际应用结果表明,该观测系统及其采集方法有效提高了地震资料信噪比,获得了更加丰富的波场信息,改善了成像精度。更多还原

【Abstract】 Analysis on 8L4S176T orthogonal geometry and the requirements of its implementation for acquisition equipment,source excitation,secondary positioning,and acquisition mode demonstrates the feasibility of the geometry in complex seafloor in order to realize improving image accuracy and resolution of middle-deep layer complex structure and attenuating acquisition footprint. Orthogonal geometry only rolls one arrangement for each time in cross-line direction to effectively avoid the acquisition footprints; the different shooting and receiving mode with different water depths improves the quality of light submarine cable seismic data; acoustic positioning,exploding along receiver line and other measures improve the acquisition efficiency. The practical application shows that the geometry and acquisition method used improves the signal-to-noise ratio of seismic data effectively,obtains richer wave field information,and enhances the imaging accuracy.更多还原