冲绳海槽中部无井区速度场建立及应用

摘要

Establishing the velocity field is necessary for in-depth study of the central Okinawa Trough. In this pa-per, two-dimensional seismic data of the no-well deep-water area in the middle Okinawa Trough were selected for the study. The stacking velocity data during processing of seismic data were obtained as the raw velocity data. By establishing the layer model and exception speed identification removal, using the Dix formula approach speed conver-sion and interpolation along the velocity, the velocity field was established in the study area. The establishment of the velocity field from the macro-regional concept, provides speed information for the central Okinawa trough. By complet-ing the variable velocity mapping, it uses geological information to reflect the subsea construction.%速度场的建立是冲绳海槽中部深入研究所必需的技术资料。作者选取冲绳海槽中部无井深水区二维地震数据，以数据处理过程中的叠加速度数据为原始速度，通过建立双层模型和异常速度识别剔除，采用 Dix 公式方法进行速度转换和沿层速度插值，建立研究区速度场。从区域速度场问题建立宏观概念，为冲绳海槽中部提供丰富可靠的速度资料，变速成图得到的构造图件与地质认识相一致，实现了由地震资料反映海底构造等地质信息的目的。