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地震沉积学在河流—三角洲沉积相及有利砂体预测方面的应用

Keywords: 地震沉积学,地震属性,波阻抗反演,沉积相,砂体分布预测

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Abstract:

?以精细岩心观察描述为基础,根据岩石类型、沉积构造及沉积序列等相标志,对研究区内hg组重点层段沉积相类型及特征进行了分析,在此基础上结合地震属性提取和砂体反演等地震沉积学研究手段,对研究区重点含气层段沉积相平面展布特征进行了刻画,预测了研究区有利砂体分布。研究表明研究区主要发育曲流河相和三角洲相沉积,主要砂体类型为曲流河边滩和三角洲平原分流河道砂体;纵向上自下而上水体由浅逐渐变深;在h6y时期,河道砂体沉积厚度最大,为储集砂体发育的最好时期;研究区有利储层砂体最有利区主要集中在中部和西南部,可作为下一步勘探开发的目标区。

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