【摘要】 海上油田建立等时地层格架过程中,面临着钻井少、无露头、地震分辨率经常不足以支撑常规技术手段划分满足开发阶段需求的地层格架等困难。为了解决这些问题,提出了切片演绎地震相分析方法,通过对地震信息的充分挖掘来建立精细等时地层格架。所谓切片演绎法,指在常规解释技术不能再细分地层单元的情况下,对该地层单元作等比例细分,通过细分的等时单元地震微相分析,结合沉积相演变规律,作进一步粗化合并,从而达到划分五级乃至六级层序地层格架目的的方法。应用该方法对LD油田明下段Ⅱ油组上进行了地震微相分析,建立了该段地层精细等时格架。生产结果表明,该方法提供的精细地层格架符合工区实际地质情况。更多还原

【Abstract】 When building isochronous stratigraphic framework,offshore oilfields often has few wells,no outcrop and low seismic solution,therefore,the development demands cannot be satisfied.Aiming at this problem,the isochronous slice method is put forward to construct fine stratigraphic framework by fully excavating the seismic data.The isochronous slice method means that the formation is proportionally subdivided when it can’t be recognized by traditional seismic interpretation technology,seismic microfacies of every slice is analyzed,and then upscaled with the geological setting.The finer isochronous framework is built.The method was used in the NmⅡ formation in LD27-2 Oilfield for seismic microfacies analysis and fine isochronous framework construction,which is proved reasonable by later production.The isochronous slice method provides a new methodology for not only fluvial reservoir but other complex reservoirs.更多还原