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OALib Journal期刊
ISSN: 2333-9721
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地震相在塔里木盆地古城地区碳酸盐岩台地演化及特征分析中的应用
Keywords: 古城台地,地震相,碳酸盐岩缓坡,台地演化,台地边缘
Abstract:
？古城地区钻井资料欠缺。通过单井相分析、单井相标定地震相、地震相分析，研究了古城台地演化特征。台地的发育经历了缓坡—弱镶边台地—镶边台地的发育过程。从早寒武世到早中奥陶世，斜坡带的宽度依次变窄，台地边缘带的宽度呈变宽的趋势，并在地震反射外形上从初期的无明显外形特征演变到早中奥陶世的丘状外形。到中奥陶世末期，台地边缘演化到较高能型的台地边缘，但未到高能型的台地边缘。平面地震相分析表明，台地在演化过程中各相带的展布具有不规则性。研究区台地的演化属渐变过程，与塔中台地的类型形成鲜明对比。台地的沉积类型早期以相对静水沉积为主，逐渐发展到相对高能沉积。台地边缘碳酸盐岩建隆以灰泥丘为主，颗粒灰岩胶结良好，骨架礁体不发育。
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