烃气在泥岩和砂岩中的微渗漏特征及油气勘探意义

Petroleum Geology & Experiment(2013)

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Abstract
利用2个小型的烃气微渗漏实验装置,模拟了泥岩和砂岩中烃气微渗漏的变化规律,研究发现测点的烃组分含量达到平衡后则相对稳定,且平衡后的各组分占总烃含量的百分比不受测点烃组分及总烃含量大小的影响,而与测点至烃源的距离有关。这一特征在油气勘探上具有2点启示:一是通过实验模拟或实地测量烃组分的平衡时间,可以计算烃气的微渗漏速率,进而可以根据烃气的微渗漏模式来估算油气藏的散失量;二是通过井中化探或气测录井研究烃组分占总烃含量的百分比在垂向地层中的变化规律,可以预测油气藏的深度。
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Key words
micro-seepage amount,hydrocarbon componential differentiation,hydrocarbon micro-seepage,experimental simulation,balance time,reservoir depth
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