塔中碳酸盐岩缝洞型储集体精细成像  

Accurate imaging way of carbonate fracture-cave type's reservoir in Tazhong

作　　者：龚洪林[1] 袁刚[1] 田彦灿[1] 吕磊[1] 

机构地区：[1]中国石油勘探开发研究院西北分院,兰州730020

出　　处：《地球物理学进展》2012年第2期555-561,共7页Progress in Geophysics

基　　金：国家科技重大专项课题(编号:2008ZX05004-001)"四川;塔里木;鄂尔多斯盆地构造演化;岩相古地理与沉积相研究"资助

摘　　要：根据塔中82井区地形起伏较大、各种类型沙丘产生的干扰波发育以及奥陶系碳酸盐储集体埋藏深、纵横向非均质性强的特点,为了提高奥陶系碳酸盐岩内幕成像精度,开展了碳酸盐岩缝洞型储集体成像方法研究,建立了一套以高精度静校正技术、地表一致性振幅补偿技术、叠前去噪技术、三维高保真处理技术、叠前子波处理技术、视各向异性动校正技术、三维速度分析技术、三维高精度偏移速度建模技术、三维叠前时间偏移处理技术为基础的碳酸盐岩缝洞型储集体精细成像技术方法.塔中82井区三维地震资料的实际应用结果表明,应用所建立技术方法刻画断裂特征更清楚,使绕射波归位更准确,提高了地震资料信噪比和分辨率,为高精度碳酸盐岩缝洞型储层预测提供了高质量的三维地震资料,为塔中碳酸盐岩400万吨产能建设奠定了良好基础.In view of the characteristics of the serious topographic relief of the 82 well block in Tazhong area,the developed interference wave created by a variety of dunes and the deep burying and strong heterogeneity vertically and horizontally of the Ordovician carbonate reservoir,we carried out the study of imaging methods to the fractured-cavernous carbonate reservoir,establishing a set of fine imaging techniques to it,which is based on the techniques of high accuracy static correlation,surface consistent compensate,prestack noise elimination,3-D Hi-Fi processing,prestack wavelet processing,apparent anisotropy NMO,3-D velocity analysis,3-D high accuracy migration modeling and 3-D prestack time migration.The actual application result indicates that the applying of establishing techniques makes fault depicting more clearly and diffracted wave homing more accurately,improves the SNR and resolution of seismic data,provides the high quality 3-D seismic data for the high accuracy reservoir prediction of fractured-cavernous carbonate,and lays a good foundation for the 4 million tons construction of carbonates in Tazhong area.

关 键 词：塔中82井区 碳酸盐岩 缝洞型储集体 串珠状反射 三维叠前时间偏移 

分 类 号：P631[天文地球—地质矿产勘探]