拖缆高密度采集施工的关键因素及质量控制

Key Factors and Quality Control of High Density Acquisition by Towing Cable

高密度三维地震勘探应用越来越广泛,海上拖缆高密度三维地震资料采集需要拓宽震源频带和提高空间及时间采样率。结合渤海油田A区块拖缆高密度采集施工的实例,总结了海上拖缆高密度三维地震采集施工的关键因素,即宽频带的空气枪震源配置、电缆深度控制、电缆间距控制、全网高精度声学定位、电缆噪音压制和精确的校正技术。拖缆高密度采集的资料分辨率有较大提高,效果较好,对各种方式的海上拖缆采集具有指导意义和借鉴作用。

The application of high density 3D seismic exploration has become more and more widely, and the high density 3D seismic data acquisition in the sea needs to broaden the frequency band of seismic source and improve the spatial and temporal sampling rate. Based on the example of high density data acquisition in A block of Bohai oilfield, the key factors of high density 3D seismic acquisition by maline towing cable are summarized： the configuration of broadband air gun seismic source, the control of cable depth, the control of cable spacing, the high precision acoustic localization of the whole network, the suppression of cable noise and the precise calibration technique. The resolution of high density towing cable data acquisition has a great improvement, and the effect of it is also very. good, and it has guiding significance and reference to the marine towing cable acquisition in different ways.