倾角导向体约束下的储层预测技术

Reservoir prediction technique on restrain of dip steering cube

以哈萨克斯坦南图尔盖盆地岩性油气藏研究为例,倾角导向体约束下的储层预测技术为核心,结合研究区岩性油气藏的特点,应用地震资料开展倾角导向体处理和全三维层序地层解释,通过双域地层切片分析、储层反演等方法,完成了目的层储层预测工作。在研究中将倾角导向体约束下的等时低频模型引入到地震波阻抗反演中,用层序界面来约束井间波阻抗的内插外推,据此完成的反演结果能够较好地反映研究区侏罗系三套目标砂体的退覆上超特征。研究表明,倾角导向体约束下的储层预测技术,明显地提高了砂体的辨识度,预测结果能更加清晰地刻画出目标砂体的空间展布特征。

We takes the research of lithologic reservoirs of South Turgay basin in Kazakhstan as an example in this paper.Focusing on the reservoir prediction technique restrained by dip steering cube,and combining with the characteristics of lithologic reservoirs in the research area,dip steering cube processing and full 3Dsequence stratigraphic interpretation are carried out by making use of seismic data.The reservoir prediction of target stratum is accomplished by using techniques,such as double domain strata slice analysis,and reservoir inversion.In this study,isochronal low frequency model restrained by dip steering cube is led into seismic impedance inversion,and interpolation and extrapolation of seismic impedances between wells are restrained by sequence boundaries.Inversion results according to the above work can reflect offlap and onlap features of Jurassic three target sands in this area very well.The study shows that,on one hand,the reservoir prediction technique restrained by dip steering cube significantly improves the identification of sands,on the other hand,,the prediction can describe the spatial distribution characteristics of target sands more clearly.