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地震相是沉积相在地震剖面上表现的总和。勘探实践表明,胜坨地区沙四段是岩性隐蔽油气藏发育的有利地区,因此,在胜坨地区沙四段开展地震相分析对落实有利储层具有实际的指导意义。针对东营凹陷坨123断块沙四段的具体地质背景,在对地震剖面层序划分和追踪对比的基础上,总结出5种典型的地震相:亚平行席状地震相、丘形上超充填地震相、透镜状地震相、楔形杂乱地震相和空白地震相,并分析了其主要特征及展布范围。最后利用地震波形分类软件Stratimagic建立了Es42砂层组岩性与井旁地震道波形的对应关系,划分出Es42砂层组的波形地震相平面分布图,为东营凹陷坨123断块沙四段的有利储层预测奠定了基础。
Seismic facies is the sum of sedimentary facies on seismic sections. Exploration practice shows that the Shahejie Formation in Shengtuo area is a favorable area for the development of subtle lithologic reservoirs. Therefore, the analysis of seismic facies in the fourth member of Shengtuo area is of practical significance in the implementation of favorable reservoirs. According to the specific geological background of Sha 4 Member of Tuo 123 block in Dongying Depression, based on the sequence division and tracking comparison of seismic profiles, five typical seismic facies are summarized: the sub-parabolic seismic facies, Seismic facies, lenticular seismic facies, wedge-shaped seismic facies and blank seismic facies, and analyzed its main features and distribution range. Finally, the relationship between the lithology of the Es42 sandstone group and the waveform of the seismic trace near the well was established by using the seismic waveform software Stratimagic. The waveform phase distribution of the Es42 sandstone group was defined. Beneficial reservoir prediction laid the foundation.