地震资料的精细目标处理在层序地层学研究中的应用

高分辨率层序地层学的发展,要求运用高分辨率地震勘探技术进行精细目标处理,以寻找隐蔽性圈闭.小波理论作为傅里叶变换的继续和发展,具有时频局部性的特征,可以提高信噪比和分辨率.在准噶尔盆地阜东斜坡区侏罗系层序地层学的研究过程中,通过小波处理软件WTDECON的应用,地震剖面上信噪比和分辨率都有明显的提高,并在三工河组确定出6个三角洲前缘滑塌浊积扇砂体,经地震资料的精细目标处理和地震反演及道积分剖面处理,进一步证实了深水浊积扇砂体的分布位置及砂岩属性,为在阜东斜坡区侏罗系寻找自生自储式隐蔽岩性圈闭提供了可靠的地球物理信息. 

APPLICATION OF THE SUBTLE OBJECT PROCESSING OF SEISMIC DATA TO SEQUENCE STRATIGRAPHY

With the development of high resolution sequence stratigraphy, it is necessary to use high resolution seismic exploration technology to do subtle object processing in order to seek concealed stratigraphic traps. Based on the Fourier transformation and with the characteristics of time and frequency localization, the wavelet theory can raise the signal to noise ratio and resolution of seismic data. In the study of the Jurassic sequence stratigraphy in Fudong Slope area of the Junggar Basin, the application of wavelet processing software WTDECON has greatly improved the signal to noise ratio and the resolution in seismic sections. In addition, six delta front fluxoturbidite fan sandbodies were ascertained in the Sangonghe Formation. By the subtle object processing of seismic data, seismic inversion and trace integration section processing, the distribution location of deep water fluxoturbidite fan sandbodies and the properties of sandstone were confirmed. This will provide reliable geophysical information for seeking concealed lithologic traps with self grown and self reserved oil and gas in the Jurassic of Fudong Slope area in the Junggar Basin.