三维多震源混合采集数据波场分离方法研究

混合采集由于单炮间的激发间隔远小于常规采集情况,具有采集周期短、作业成本低的优点,近年来,该项技术得到许多学者和石油公司的青睐;但在实际应用中,这种特殊观测系统的采集质量受波场分离因素的制约,许多学者开展了大量的工作研究;但对于三维多震源混合采集数据波场分离仍面临精度的制约。首先阐述了三维多震源混合采集的观测系统;并对其进行数值模拟。然后将稀疏反演方法应用于三维混采数据分离,建立了相应的公式;并使用该分离方法对模拟的混合数据进行波场分离,得到了满意的分离结果。通过对模拟数据的计算,验证了三维多震源混合采集数据波场分离方法的有效性和适用性。

Research on method of wave-fields separation for 3D multi-source blended acquisition data

Because the time intervalsbetween successiveshotsare far less than conventional acquisition in blended acquisition,it has the advantages of short acquisition cycle and low operation cost. In recent years, the technology got the favor of many scholars and oil companies. However, in practice, this particular recording geometry of acquisition quality is restricted of the wave field separation factors.Many scholars have conducted a lot of work, but wave-fields separation for 3D multi-source blended acquisition data still faces precision constraints. Firstly, this paper expounds recording geometry of 3D multi-source blended acquisition and carries on the numerical simulation.And then this paper applies sparse inversion method to separation for the 3D multi-source blended acquisition data, and establishes the corresponding formula. This paper uses sparse inversion method for the wave-fields separation of blended data of simulation and obtains satisfactory separation results. This paper verifies the wave-fields separation method for 3D multi-source blended acquisition data is valid and feasiblevia trial of analog data.