一致性处理技术在准噶尔盆地三维连片处理中的应用

Consistent processing for 3D seismic data merging in Junggar Basin

MX1JB三维连片处理,包含五块不同年代采集的三维资料,涉及到气枪、可控震源、井炮三种震源和水陆两种接收方式。不同区块资料的振幅、频率和相位存在明显差异,一致性处理至关重要。为此,结合GeoEast处理系统的特色技术,建立了针对该区资料的一致性处理技术流程。首先利用水陆检合并技术消除不同接收方式的影响;然后通过球面扩散补偿和地表一致性振幅补偿技术分别对地震记录的纵、横向能量进行恢复;再采用地表一致性反褶积和子波整形技术消除由不同震源引起的子波的频率、相位、波形差异。最终得到的地震资料一致性好,成像质量高,为后续构造解释和储层预测提供了高品质资料。

The MX1 JB 3 D merging project involves five3 Dseismic data sets,which were acquired in different times,with different sources and sensors:air gun,vibroseis,and dynamite;geophones and hydrophones.The amplitude,frequency,and phase of the data are significantly different.So the consistent processing is extremely important for this merging project.To this end,a consistent processing flow is established based on powerful processing approaches provided by GeoEast System.Firstly,the influence of different receivers is eliminated by dual sensor data summing.Then the longitudinal and lateral energy of seismic records are recovered with spherical diffusion compensation and surface consistent amplitude compensation respectively.Finally the frequency,phase,and waveform differences of wavelets caused by different sources are eliminated by the surface consistent deconvolution and wavelet shaping.Our consistent processing achieves quite good data consistency,which provides a solid foundation for subsequent seismic interpretation and reservoir prediction.