基于三维地震数据的准层序组内沉积体的解释研究

Interpretation of depositional bodies in the parasequence sets from 3-D seismic data.

基于三维地震数据和层序地层学理论能否有效地解释准层序组内沉积体的空间展布,是一个关系到地震分辨率和地震勘探能力的有争议问题。基于准噶尔盆地560 km2大面元三维地震数据,对这个问题进行了探讨。给出了利用地质、测井和三维地震信息进行J1s2准层序组顶、底标定的原则;利用井信息对准层序组内的沉积特征进行了描述;应用地震地层学理论和储层属性分析方法对三维地震数据进行了解释,得到了J1sz准层序组内J1s21和J1s22准层序沉积体的有效空间展布和叠置关系。

It is a controversial problem whether seismic resolution and exploration capability can be enhanced by effectively interpreting the spatial exhibition of depositional bodies in the parasequence set based on 3-D seismic data and sequence stratigraphy. Nevertheless, this is obviously a problem worth studying in the field of seismic and geological comprehensive interpretatioa In consideration of relative preservation of amplitude, frequency, phase and waveform, we have interpreted a 3-D dataset with the large bin size, collected from an area of 560 square kilometers in the Junggar Basin, using sequence stratigraphy-guided seismic stratigraphy and reservoir evolvement methods combined with sequence interpretation of well data and calibration of the reference marker. Finally, we have obtained the effective spatial exhibition and superposition relationship of depositional bodies J1 s21 and J1 s22 in parasequence set J1 s2.