中国石油大学学报（自然科学版）2018，Vol.42Issue(2)：102-109,8.DOI:10.3969/j.issn.1673-5005.2018.02.012
鄂尔多斯盆地长7致密油储层岩心渗吸试验
Experimental study on imbibition of Chang7 tight oil cores in Erdos Basin
摘要
Abstract
The spontaneous imbibition in porous media,as one of frontier subjects in percolation studies of fractured reser-voirs,has been investigated in the development of tight oil reservoirs via water-flood huff and puff process. It has indicated that,based on the current research, water imbibition mainly depends on the relative contribution of capillary and gravity forces,which are dominated by different regimes in different fluid systems. In this study,based on the NMR analysis meth-od,the imbibition experiments of Chang7 tight oil cores were carried out,and the experimental data were analyzed with fully understanding the pore-throat structures and accurate oil/water saturation from the NMR analysis. The experimental results show that the final oil recovery is closely related to the inverse Bond number in static imbibition experiments. The ultimate oil recovery of Chang7 tight oil cores is 30%-35%,and the critical inverse Bond number required to achieve the maximum oil recovery is about 1. In comparison of the static imbibition and dynamic displacement experiments,the results show that the smaller of the dynamic displacement rate,the lower of the oil recovery in the large pore-throat regions,while the distribution of oil and water saturation is basically the same in small pore-throat regions. The experimental study on the water imbibition of Chang7 tight oil cores in Erdos Basin can provide useful guidelines for improved oil recovery via applying the water-flood huff and puff technique in tight and fractured oil reservoirs.关键词
致密油/核磁共振/自发渗吸/注水吞吐/渗流机制Key words
tight oil reservoir/NMR analysis/spontaneous imbibition/water-flood huff and puff/percolation mechanism分类
能源科技引用本文复制引用
屈雪峰,雷启鸿,高武彬,张龙,何右安,王博..鄂尔多斯盆地长7致密油储层岩心渗吸试验[J].中国石油大学学报（自然科学版）,2018,42(2):102-109,8.基金项目
国家科技重大专项(2011ZX05013-004) （2011ZX05013-004）
中国石油集团公司重大专项(2011E-2602) （2011E-2602）
