核磁共振成象:21世纪的新技术

• 作 者: Bill Kenyon 陈治华
• 机 构: 西安石油勘探仪器总厂《测井技术》编辑部,
• 出 处: 国外油气勘探
• 发表日期: 1996年06期
• 关键词: 测井技术 核磁共振成象 储集层 渗透率 测井仪 残余油饱和度 束缚水 岩石颗粒 毛管压力曲线 测井曲线

70年来,尽管测井技术有了长足发展,但是,靠连续测井曲线仍不能圆满地测取诸如产量、束缚水饱和度和残余油饱和度等重要储集层特征。渗透率连续曲线依然难以理解,不少生产层被漏划, 因而许多石油仍旧深埋在地下而无法开采。人们一直期盼着利用核磁共振(NMR)测井能获得这些重要特征。然而,只有在最近,人们才在大量实验的基础上,在物理学领域进行了充分的研究,使测井技术日趋成熟,从而实现了这一美好愿望。本文综述NMR的物理原理及其解释;同时分析了NMR的成功测井实例。

For 70 years, despite the advances in logging technology, it is still not possible to satisfactorily measure key reservoir characteristics such as yield, irreducible water saturation, and residual oil saturation by continuous well logs. Continuous permeability curve is still difficult to understand, many production layer was missing, so many of the oil is still buried in the ground and can not be mined. People have been looking forward to using nuclear magnetic resonance (NMR) logging to obtain these important features. Only recently, however, has people carried out sufficient research in the field of physics based on a large number of experiments, so that the well logging technology has matured and the good wishes have been fulfilled. This article reviews the physical principles of NMR and their interpretation; and analyzes the successful NMR logging examples.