地震岩性地貌体在薄储层沉积微相研究中的应用

Application of seismic lithologic geomorphy in thin-bed reservoir sedimentary microfacies study

针对薄储层区难以利用地震相开展沉积微相研究的难题,提出了地震岩性地貌体概念及其应用方法。地震岩性地貌体是反映沉积体岩性特征及其平面形态特征的一种地震属性体,不同于常规地震相分析侧重于剖面地震反射特征,它强调的是平面地震反射特征的指相意义,具有可量化表征性。指相属性的提取和井震标定是地震岩性地貌体沉积相分析的关键;叠前弹性模量属性分析、平面地震相模式标定和多信息融合解释是该项技术应用的必要途径和有效手段。这套方法在饶阳凹陷M构造带沉积微相研究中得到了成功应用。

Since it is rather difficult to use seismic facies in thin-bed reservoir sedimentary microfacies study,we put forward in this paper the concept of seismic lithologic geomorphy.Seismic lithologic geomorphy is a kind of seismic attributes which re-flects both lithological and morphological features of sedimentary deposits.Unlike conventional seismic facies analysis,which particularly focuses on seismic reflections on sections,seismic lithologic geomorphy emphasizes the ability of plane seismic reflections to identify facies.In seismic lithologic geomorphy based sedimentary facies analysis,seismic attribute extraction and seismic calibration with well data are the key processes.And prestack attributes analysis of elasticity modulus,plane seismic facies mode calibration,and multi-information joint interpretation are effective means needed.The proposed method has been successfully applied to sedimentary microfacies study in the tectonic belt M,Raoyang Sag.