核磁共振录井技术在高显示水层评价中的应用

The application of the nuclear magnetic resonance logging technology in the water zones with high show

随着勘探目标逐步转向油藏地质条件相对复杂的地区,油水层解释评价难度不断加大。低孔隙度、低渗透率粉、细砂岩储集层形成的束缚油高显示水层,在勘探领域是最难评价的一类储集层,在吉林探区对高显示水层的认识评价不足严重影响了录井综合解释符合率的提高。在系统分析总结吉林探区高显示水层的类型及其评价方法基础上,结合近几年的录井科研成果,通过引入核磁共振录井评价技术,应用核磁录井谱图形态法,较好地解决了这一技术难题。

With the exploration target gradually shifting to the relatively complex geological area,the interpretation and evaluation for oil and water zones are becoming increasingly difficult.The high show water zones produced by the bound oil in the fine-grained sandstone reservoirs with low porosity and low permeability are the most difficult evaluating reservoirs in the exploration field.In Jilin exploration area,the lack of understanding for the high water show zones has seriously affected the comprehensive interpretation coincidence rate of mud logging.On the basis of systematically analyzing and summarizing the types of high water show zones and its evaluation method for Jilin exploration area,combined with logging scientific research in recent years,this technical problem can be solved by the introduction of nuclear magnetic resonance logging evaluation technique and using the spectrum shape method of nuclear magnetic resonance logging.