低渗透储层可动剩余油核磁共振分析

发布时间：2018-01-16 11:32

  本文关键词：低渗透储层可动剩余油核磁共振分析　出处：《西南石油大学学报(自然科学版)》2016年01期 　论文类型：期刊论文

  更多相关文章： 低渗透储层 高速离心 核磁共振 可动剩余油 非均质性

【摘要】：针对有代表性密闭取芯岩芯平行样,分别进行油水饱和度和油水高速离心驱替实验核磁共振分析,定量获得储层目前剩余油饱和度、采出油相对量、可动油饱和度及驱油效率上限等参数,对比各参数建立储层可动剩余油饱和度核磁共振分析方法。研究表明,建立岩芯饱和油束缚水状态和水驱油的最佳离心力分别为2.250 MPa和0.220MPa,4个渗透率级别(≥50、[10,50)、[1,10)和1 mD)储层采出油饱和度分别为23.49%、16.81%、8.70%和9.99%,可动油饱和度分别为50.34%、43.76%、29.67%和22.89%,可动剩余油饱和度分别为26.85%、26.95%、20.97%和12.90%,由于储层非均质性影响,大于10 mD储层采出油明显高于10 mD以下储层,但大于10 mD储层可动油饱和度较高,故可动剩余油饱和度也较高,小于1 mD的储层可动剩余油明显低于其他储层。
[Abstract]:In view of the representative closed core parallel samples, the oil water saturation and oil water high speed centrifugal flooding experiment NMR analysis were carried out respectively, the present remaining oil saturation of the reservoir was obtained quantitatively, and the relative amount of produced oil was obtained. According to the parameters of movable oil saturation and upper limit of oil displacement efficiency, the NMR analysis method of movable remaining oil saturation of reservoir is established. The optimum centrifugal force of core saturated oil irreducible water state and water drive oil is 2.250 MPa and 0.220 MPA, respectively, and four permeability levels (鈮，

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