【摘要】 山东LK地区滩海三维Ⅰ区主要为环渤海湾的两栖带和浅海水域,地下勘探目标为第三系煤层,埋藏浅、勘探难度大。海底采煤风险程度高,因此要求地震资料具有高信噪比和高分辨率。根据地表条件和浅层勘探特点,在两栖区采用浅井、小药量激发,确保了浅层资料的分辨率;在浅海水域采用优选的最佳气枪阵列似"点震源"激发,消除了气泡效应,同时采用实时定位和二次定位技术,确保了海上检波器的定位精度。实践表明,该技术特别适用于滩海地区的浅层地震资料采集。更多还原

【Abstract】 The 3D Ⅰarea in LK, in Shandong Province is mainly located in the tidal zone and shallow water area of the Circum-Berhai Bay. The subsurface exploration targets are coal beds in Tertiary System, which are shallow and difficult to explore. The seismic data must be of high S/N ratio and high resolution because of getting coal from seabed has high risk. According to the features of surface conditions and shallow layer exploration, small charges in shallow wells was used to ensure the high resolution of data in intertidal zone, and the"spot-like source" of optimum air gun array was used to avoid the bubble effects and in the mean time real-time positioning and quadric positioning techniques were applied to ensure to the hydrophones were laid at a acceptable precision in shallow water area. The result from the real work indicates that this technique is especially suitable to the seismic exploration from shallow layers in tidal zone and shallow water area.更多还原