摘要
Abstract
The working area of A hollow in Lufeng Sag is small,and the oil-gas reserves are rich.The resolution of the o-riginal seismic data is low,and after multiple reprocessing,the contact relationship of the target layer is difficult to determine.The imaging of complex fault zones and the high-dip-angle basement is fuzzy,which is challenging to meet the exploration needs.Therefore,the second three-dimensional seismic data acquisition is carried out in this area,and the acquisition azimuth is orthogonal.Given the three-dimensional seismic data collected in different directions in the same block,the difference of seismic data in different directions is analyzed,and the combined tomography inversion technology with fault constraint is pro-posed to obtain the velocity field with higher accuracy.Through the dip angle and azimuth attribute of TTI anisotropy,the co-axial dislocation of steep dip strata in different azimuth data is solved,the migration and positioning accuracy is improved,and the fusion imaging of two-dimensional data is better realized.The imaging quality of Paleogene steep dip strata is improved,stratigraphic continui-ties、the signal to-noise ratio is higher,which provides reliable basic data for subsequent geological e-valuation.关键词
陆丰凹陷/复杂断裂带/双方位资料/断层约束层析/TTI各向异性Key words
lufeng sag/complex fault zone/dual-azimuth seismic data/fault-constrained tomography/TTI anisotropy分类
地质学
