可控震源时变滑动扫描及低频能量补偿技术

Technology of variable slip time sweep and low-frequency energy compensation with vibroseis operation

由于可控震源安全、环保、频率和能量可控等作业特点,获得业界的广泛重视和推广应用。给出了一种面向地质目标的可控震源优质、高效地震勘探技术方法,即可控震源时变滑动扫描(VSTS)方法和低频能量补偿的宽频勘探技术。针对勘探目的层埋深跨度大、地质构造和地表复杂勘探区的特殊条件,提出了以可控震源间特征噪声干扰水平、地表条件为依据,以目的层反射资料高质量成像为目的,合理设计可控震源作业面上的分布和工作方法,实现了可控震源优质、高效地震施工,在中国西部多个盆地复杂地质目标勘探中应用获得很好的资料效果。

Vibroseis is widely valued and applied by the industry due to its features of safety, environmental friendly and controllable frequency and energy. This paper presents a target-oriented, high-quality and efficient seismic exploration method, namely, variable slip time sweep （VSTS） and broadband exploration technology of low-frequency energy compensation. According to the special conditions of exploration areas with large-span buried depths of target formations and complex geological structures and surfaces, well-designed distribution and method of vibroseis operation were put forward, which is based on noise interference between vibroseises and surface conditions and for the purpose of high-quality imaging of reflection data. As a result, high-quality and efficient operation with vibroseis has been achieved. Favorable results have been obtained after the application in complex geological targets within some basins in West China.