【摘要】 本文结合小波变换理论和分形分维理论,利用小波变换的多尺度分解对地震资料进行分解,选取不同尺度的信息,计算其振幅谱分维数;根据含油气井的振幅谱确定能够反映油气异常信息的标度不变区,在该标度不变区内求分形维数,分维数值越大,说明含油气的可能性越大,据此预测储层的含油气性.实践表明,多尺度分形分维技术能够较准确地反映由地震波形等引起储层和油气层的变化,是一种较好的储层预测和油气预测方法.理论模型和实际资料的处理结果,也得到了明显的改善.更多还原

【Abstract】 The is single layer is thin and the lithology changes fast in lateral.In order to resolve problem of the oil/gas prediction in the thin sand-body with the seismic properties the paper combines wavelet transforms theory and fractal dimension theory,decompose seismic data by the multi-scale decomposition of wavelet transforms,select different scales,calculate the amplitude spectrum Fractal dimension;Define scale invariant area according to the amplitude spectrum of oil and gas well,then compute the fractal dimension of the scale invariant area,the higher the value of the fractal dimension,the greater the possibility of reservoir oil-bearing property.Hereby,we predicte the reservoir oil-bearing property of the whole work area.The practice shows that the technology of multi-scale fractal dimension can reflect the change of reservoir and oil and gas formation caused by seismic wave form,is a better method of reservoir and oil-bearing property prediction.It get obviously improvement in the processing of theoretical model and real data.更多还原