塔里木盆地碳酸盐岩地震资料处理的几项关键技术  

Seismic data processing techniques of carbonate rocks in Tarim Basin

作　　者：王小卫[1,2] 吕磊[2] 刘伟方[2] 郄树海[2] 田彦灿[2] 

机构地区：[1]中国地质大学(武汉) [2]中国石油勘探开发研究院西北分院

出　　处：《岩性油气藏》2008年第4期109-112,共4页Lithologic Reservoirs

摘　　要：塔里木盆地奥陶系碳酸盐岩是典型的岩溶储集体,因碳酸盐岩内部地层界面波阻抗差异小,奥陶系内幕反射明显较弱。岩溶缝洞的发育在地震剖面上表现为"串珠状"反射,这个特征有助于识别岩溶。针对研究区的特点,在资料处理中,注重资料的相对保幅处理、去噪方法的优选,采用合理的反褶积技术,以提高奥陶系内幕资料的分辨率。叠前时间偏移技术的合理应用是突出塔中工区奥陶系内幕反射特征的有效手段。Ordovician carbonate rocks in Tarim Basin are typical karst reservoirs. For the little difference of wave impedance in the formation interface of the carbonate rocks, the reflection information from the Ordovician is obviously poor. The development of karst fracture on the seismic profile displays a string of beads, which is a significant method for identifying karst. According to the characteristics of Tazhong area, we should place stress on the optimization of the relative amplitude preserved processing and denoising method in seismic processing and choose advisable deconvolution technique to improve the resolution of Ordovician. The application of prestack time migration technique is an effective approach to stand out the reflectance signature of Ordovician in Tazhong area.

关 键 词：碳酸盐岩 岩溶圈闭 串珠状反射 保幅处理 分辨率 叠前时间偏移 

分 类 号：P631.4[天文地球—地质矿产勘探]