论文详情
The domain of seismic exploration has expanded to cover complex topographies,complex subsurface structures,complex reservoirs,and deep geological targets.The new generation of accurate seismic exploration methods entail wide-azimuth,wide-frequency band,and high-density seismic data acquisition.In these methods,full-wave inversion,and least-square reverse time migration methods based on Bayes estimation theory have become the standard for imaging,and reservoir characterization is implemented with integrated information utilization and optimal inference.Evidently,seismic exploration has entered a new era.For the last-generation accurate seismic exploration,the assumption of consistence for layers and surfaces,the ray-theory wave propagation,and Zoeppritz equations define the scope of seismic data processing and its applicability.A high-resolution seismic wavelet is the key objective of seismic data acquisition and imaging methods,based on which the identification,characterization,and evaluation of thin reservoirs is carried out.In new-generation methods,the theoretical basis is enriched by a number of tools,namely:the Bayesian estimation theory and wave equations that describe wave propagation in complex media.The seismic data acquisition with wide-azimuth,wide-frequency band,and high-density sampling;accurate seismic wavelet processing;amplitude and phase preserving signal processing based on high dimension,dictionary bases and sparse representation;characteristic wave inversion for accurate velocity model building;Q model building and wideband reflectivity estimation;wideband impedance model building;and reservoir characterization with integrated information utilization and artificial intelligence,all of these methods provide novel pathways for accurate seismic exploration.
国家重点研发计划变革性技术关键科学问题重点专项(2018YFA0702503)、国家重点研发计划深海关键技术与装备重点专项(2019YFC0312004)、国家自然科学基金(41774126)、南方海洋科学与工程广东省实验室(湛江)资助项目(ZJW-2019-04)共同资助。