核磁共振技术在水驱油实验中的应用

Application of Nuclear Magnetic Resonance Imaging Technology in Water Driving Oil Experiment

邓瑞健

Deng Reijian

中原油田分公司勘探开发科学研究院

Research Institute of Petroleum Exploration and Development , Zhongyuan Oilf ield Company, SINOPEC, Henan 457001 , P. R. China

为了更直观地研究油藏的微观油水渗流特征,探索水驱油的微观剩余油分布规律,找出储层非均质性对水驱油效果的影响规律,采用低磁场和高磁场核磁共振技术,进行了天然岩心水驱油实验研究。研究表明:串联组合的平面非均质岩石出口端的剩余油饱和度明显高于入口端的剩余油饱和度,其剩余油主要分布于中小喉道内;而完全得到水驱的岩石,其剩余油分布相对比较均匀,高含油孔隙度层与低含油孔隙度层内均有一定量的剩余油存在。其结论可直接指导实际油藏剩余油的挖潜方向。

To investigate the much audio-visual oil reservoir microcosmic oil and water seeping character , to probe into microcosmic residual oil distributing law of water driving oil , to find out affecting law of storing floor horizontal heterogeneity character opposing water driving oil impact . Experiment has been studied of Pucheng Oilfield combinatorial horizontal heterogeneity savageness rock core. The result is indicated that residual oil saturation in exit end of horizontal heterogeneity rock core in series combination is higher than in enter end , it is independent of permeability height . The residual oil mostly distribute in middle and small throat. The residual oil distribution is relatively equality of rock driven entirely by water. There all cxist some residual oil in high and in low crude-bearing porosity floor. This conclusion can be using to guide directly residual oil digging direction of practicality oil reservoir.