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地质论评  2003 

松辽盆地升平地区深层成岩作用数值模拟与次生孔隙带预测

Keywords: 成岩作用数值模拟酸性热流体次生孔隙松辽盆地预测碎屑岩

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Abstract:

为了预测松辽盆地深部碎屑岩成岩阶段和次生孔隙发育带的展布、研究储层孔隙发育史与其他成藏要素的匹配关系,本文将传统的成岩作用研究和数值模拟技术相结合,在作用模型和效应模型的基础上,建立了一个成岩作用数值模拟的综合模型。松辽盆地升平地区深层登娄库组成岩演化的研究表明,在泉头期末,登娄库组进入晚成岩阶段A1期,烃源岩进入生油门限,储层开始发育次生孔隙;在青山口期末,登娄库组处于晚成岩阶段A―B期,登二段烃源岩进入大量生、排烃的成熟阶段,生烃时间、储层次生孔隙发育时间和圈闭形成时间匹配良好,油气藏开始形成。目前,本区的登娄库组在南部主要处于晚成岩阶段C期,在北部处于晚成岩阶段B期。成岩指数ID=0.85~1.15,且有砂体发育的地区,即为本区次生孔隙发育带的分布范围。

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