叠前地震反演在储层预测与流体识别中起到了非常重要的作用,但常规振幅随角度变化(Amplitude Variation with Angle,AVA)三参数反演结果由于分辨率的限制已满足不了隐蔽油气藏勘探的高精度要求。为此,提出了一种综合利用隐含在叠前地震...叠前地震反演在储层预测与流体识别中起到了非常重要的作用,但常规振幅随角度变化(Amplitude Variation with Angle,AVA)三参数反演结果由于分辨率的限制已满足不了隐蔽油气藏勘探的高精度要求。为此,提出了一种综合利用隐含在叠前地震道集中的AVA信息与振幅随频率变化(Amplitude Variation with Frequency,AVF)信息的AVA多频信息同时反演的方法。首先对各入射角地震道集进行谱分解,得到振幅随角度和频率变化(Amplitude Variation with Angle and Frequency,AVAF)三维数据体,然后利用该数据体进行AVA多频信息同时反演,得到高分辨率的岩性参数反演结果。模型和实际资料应用结果表明,叠前AVA多频信息同时反演结果比常规AVA反演具有更高的分辨率,能更精细地刻画砂泥岩薄互层等隐蔽油气藏。展开更多
The conventional poststack inversion uses standard recursion formulas to obtain impedance in a single trace.It cannot allow for lateral regularization.In this paper,ID edge-preserving smoothing(EPS)fi lter is extended...The conventional poststack inversion uses standard recursion formulas to obtain impedance in a single trace.It cannot allow for lateral regularization.In this paper,ID edge-preserving smoothing(EPS)fi lter is extended to 2D/3D for setting precondition of impedance model in impedance inversion.The EPS filter incorporates a priori knowledge into the seismic inversion.The a priori knowledge incorporated from EPS filter preconditioning relates to the blocky features of the impedance model,which makes the formation interfaces and geological edges precise and keeps the inversion procedure robust.Then,the proposed method is performed on two 2D models to show its feasibility and stability.Last,the proposed method is performed on a real 3D seismic work area from Southwest China to predict reef reservoirs in practice.展开更多
文摘叠前地震反演在储层预测与流体识别中起到了非常重要的作用,但常规振幅随角度变化(Amplitude Variation with Angle,AVA)三参数反演结果由于分辨率的限制已满足不了隐蔽油气藏勘探的高精度要求。为此,提出了一种综合利用隐含在叠前地震道集中的AVA信息与振幅随频率变化(Amplitude Variation with Frequency,AVF)信息的AVA多频信息同时反演的方法。首先对各入射角地震道集进行谱分解,得到振幅随角度和频率变化(Amplitude Variation with Angle and Frequency,AVAF)三维数据体,然后利用该数据体进行AVA多频信息同时反演,得到高分辨率的岩性参数反演结果。模型和实际资料应用结果表明,叠前AVA多频信息同时反演结果比常规AVA反演具有更高的分辨率,能更精细地刻画砂泥岩薄互层等隐蔽油气藏。
基金The National Key S&T Special Projects (No. 2017ZX05008004-008)the National Natural Science Foundation of China (No. 41874146)+2 种基金the National Natural Science Foundation of China (No. 41704134)the Innovation Team of Youth Scientific and Technological in Southwest Petroleum University (No. 2017CXTD08)the Initiative Projects for Ph.Din China West Normal University (No. 19E063)
文摘The conventional poststack inversion uses standard recursion formulas to obtain impedance in a single trace.It cannot allow for lateral regularization.In this paper,ID edge-preserving smoothing(EPS)fi lter is extended to 2D/3D for setting precondition of impedance model in impedance inversion.The EPS filter incorporates a priori knowledge into the seismic inversion.The a priori knowledge incorporated from EPS filter preconditioning relates to the blocky features of the impedance model,which makes the formation interfaces and geological edges precise and keeps the inversion procedure robust.Then,the proposed method is performed on two 2D models to show its feasibility and stability.Last,the proposed method is performed on a real 3D seismic work area from Southwest China to predict reef reservoirs in practice.
