薄储层预测精度是油气勘探开发的难点问题。波阻抗反演作为储层预测的重要技术,能够有效地提高薄储层的预测精度。提出一种基于井震协同表征的反演思想,通过波形驱动的结构化反演算法,实现相控反演的地震波行指示反演方法。在反演过程中通过曲线重构、储层结构分析及样本优选,提高反演确定性频率成分的范围,并使其高频成分由随机到相对确定。该方法在渤海油田的勘探过程中得到了较好的应用,其中对渤中A油田明下段Ⅳ油组的河道叠置砂体进行了有效区分,并准确预测了其分布范围。

The accuracy of thin reservoir prediction is a difficult issue in oil and gas exploration and development.As an important technique of reservoir prediction, wave impedance inversion can effectively improve the prediction accuracy of thin reservoir.In this paper, a new inversion method based on the cooperative representation of borehole and earthquake is proposed,which can realize the inversion method of seismic wave line indication based on the waveform driven by structured inversion algorithm.In the process of inversion, through curve reconstruction, reservoir structure analysis and sample optimization, the range of inversion determinate frequency components is improvedand the high frequency components are determined from stochastic to relative.The method has been used in the exploration of Bohai oilfield, and the effective distinction is made between theⅣoil group sand bodies in the lower section of Bozhong oilfield A, and the distribution range is predicted accurately.