地震叠前反演与直接烃类指示的探讨

Pre-stack inversion and direct hydrocarbon indicator.

随着油气勘探的不断深入,岩性油气藏和隐蔽油气藏的勘探开发问题日益受到勘探学家们的关注,地震叠前反演技术成为近年来地震属性分析和反演研究的热点。AVO技术通过分析振幅随偏移距的变化进行岩性和流体识别,交会图分析是AVO异常分析的主要技术手段。包括弹性阻抗反演和叠前同步反演在内的叠前弹性反演技术是AVO技术的主要发展方向,叠前弹性参数反演可以得到更丰富的储层岩性和流体的信息,有利于进行储层的直接烃类检测。结合地震叠前反演技术的发展历程和实际应用,探讨了利用地震叠前反演技术进行油气藏直接烃类检测的技术发展趋势。

With the development of exploration,the geophysicists focus their minds on the exploration and development of lithologic hydro- carbon reservoir and subtle pool.In recent years,seismic pre-stack inversion becomes the hot point of seismic attribute and inversion study.AVO verifies lithology and fluid through analyzing the change rule of amplitude versus offset.In this method,cross plot analysis is the main approach.The pre-stack elastic inversion is the expansion of AVO,including elastic impedance inversion and pre- stack simultaneous inversion.Pre-stack elastic parameter inversion can obtain more abundant information of reservoir lithology and fluid,which is beneficial to the direct hydrocarbon detection.Com- bined with the development history and application of pre-stack in- version technology,the development trend of direct hydrocarbon detection technology by pre-stack inversion was probed.