Multiple types of non-layered and irregular hydrocarbon reservoirs have been found in the deep carbonate strata within the Tarim Basin.These carbonate reservoirs,different from layered reservoirs,are geological bodies with limited lateral bodies in at least one direction.The observed seismic reflected wavefield is a composite field composed of reflected and diffracted(scattered)waves formed by layered strata and non-layered and irregular geological bodies.The three types of wavefields exhibit different morphological characteristics in different datasets.Based on the differences in wavefield morphology,this study,using a technique for separating lay-ered and random wavefields based on an image-guided,sparse-constrained parabolic Radon transform in the frequency domain,decom-posed high signal-to-noise-ratio data of complex reflected wavefields,which had undergone migration processing or not,into a reflected wavefield with infinite lateral extent and a diffracted(scattered)wavefield of irregular geological bodies with limited lateral extent.This technique provides a foundation for the direct prediction and investigation of irregular reservoirs and has been successfully applied in both the Tarim and Ordos basins.
关键词
波场分解/非规则储集体/缝洞体/储层预测/拉东变换
Key words
wave field decomposition/irregular reservoir/vuggy-fractured body/reservoir prediction/Radon transform
维普
万方数据