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二苯并噻吩参数与油藏动态监测、剩余油分布预测——以南堡凹陷柳北沙三3油藏为例

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Keywords: 二苯并噻吩参数,地球化学动态监测,剩余油分布,原油推进,柳北沙三3油藏

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Abstract:

?在一个高含水期油藏开发过程中,对短期内原油的组分特征进行了系统监测,揭示了其饱和烃、芳烃馏分与含氮化合物等的变化规律.研究结果表明在常用的原油成熟度/运移参数中,4-甲基/1-甲基二苯并噻吩、三环萜烷/(三环萜烷+C30藿烷)两项参数的变化显著,且二者之间呈现较好的正相关性.在注水开发过程中这两项参数的变化,系油层内水驱推动原油的流动分馏效应所致.以4-甲基/1-甲基二苯并噻吩参数为例,其示踪的油层内水驱原油流动方向与途径,以及据此对剩余油有利分布区的预测结果,与数值模拟、生产开发实际具有较好的一致性.因此,在天然边水或人工注水的油藏开发过程中,4-甲基/1-甲基二苯并噻吩、三环萜烷/(三环萜烷+C30藿烷藿烷)两项参数可以作为水驱原油动态的示踪参数.本文的有益尝试,对于油藏开发的地球化学动态监测与生产管理具有实用意义.

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