塔里木盆地洞缝型储层叠前地震描述技术研究与应用  

Research and Application on Pre-stack Seismic Characterization of Fracture- cavity Reservoir in Tarim Basin

作　　者：刘伟方[1] 王西文[1] 张喜梅[1] 蒋春玲[1] 王洪求[1] 

机构地区：[1]中国石油勘探开发研究院西北分院

出　　处：《岩性油气藏》2010年第F07期153-158,共6页Lithologic Reservoirs

摘　　要：针对叠后地震预测技术在塔里木盆地碳酸盐岩洞缝型储层的精细刻画及流体识别等方面存在的不足，开展了叠前地震预测与描述技术的攻关与应用研究，并在4个关键环节取得了重要进展：①在叠前反演方面，通过测井岩石物理分析，优选储层敏感参数，指导叠前弹性参数反演，进而预测储层物性；②在“串珠”反射有效性识别方面，主要利用AVO属性进行流体等充填物识别，对叠后剖面上的“串珠”反射去伪存真；③在裂缝储层识别方面。利用叠后／叠前多尺度裂缝预测技术研究裂缝分布规律，提高储层识别精度；④在洞缝型储层空间雕刻方面，对有效洞缝储层进行三维可视化，研究缝、洞空间配置关系。通过连续4年的叠前地震预测与描述技术攻关，叠前预测结果与实钻结果吻合较好，为洞缝型储层高效井组的建立提供了可靠依据。In Tarim Basin, post-stack prediction technology has some shortcomings in fine delineation of carbonate fracture-cavity reservoir and fluid identification. This paper discussed pre-stack seismic prediction and characterization technology and achieved important progress in 4 key areas as follows： ① Pre-stack inversion： Optimizing reservoir sensitivity parameters through rock physics analysis to guide pre-stack elastic parameter inversion, and further predict reservoir properties; ② Effectiveness identification of ＂beads-shaped＂ reflection： Using mainly AVO attributes in fluid detection or other filling fluids identification, and removing quasi＂bead-shaped＂ reflection in post-stack seismic profiles and preserving the authentic ones; ③ Fractured reservoirs identification： Using post-stack/pre-stack multi-scale fracture prediction technology to study fracture distribution rule and improve reservoir identification accuracy; ④Spatial characterization of fracture-cavity reservoirs： Studying collocation relationship of cavity and fracture through 3D visualization of fracture-cavity reservoirs. After 4 consecutive years of technological breakthrough research of pre-stack seismic prediction and characterization, the pre-stack prediction results show good consistency with the actual drilling results, and provide reliable reference for the establishment of high-productivity wells in fracture-cavity reservoirs.

关 键 词：洞缝型储层 弹性参数反演 AVO分析 流体识别 塔里木盆地 

分 类 号：P631.11[天文地球—地质矿产勘探]