宋学锋;

• 1:长江大学工程技术学院资源勘查工程学院

摘要(Abstract)：

以单井层序划分为基础,结合岩心、地震和测井资料,研究川西北地区中二叠统茅口组沉积相类型及特征,确定沉积相带分布,建立沉积模式。结果表明:研究区茅口组可分为2个三级层序——SQ1和SQ2,每个层序平均延时5 Ma;主要发育白云岩、生物碎屑灰岩和泥微晶灰岩3种岩石类型;研究区自西向东再向北依次发育盆地相、斜坡相、台地边缘相、开阔台地相、斜坡相和盆地相等沉积相。台地边缘相和开阔台地相发育滩体,其中台缘滩和台内滩储集物性更好,可作为有利勘探区;垂向上,台地边缘相发育于茅二段中晚期—茅三段(SQ1高位体系域时期);平面上,台地边缘相位于广元—绵阳—雅安一带。该结果为研究区茅口组下一步勘探开发提供地质依据。

关键词(KeyWords)：川西北地区;中二叠统;茅口组;沉积特征;沉积模式;台地边缘

Abstract:

Keywords:

基金项目(Foundation):长江大学工程技术学院科学研究发展基金项目(14j0103)

作者(Author):宋学锋;

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