利用核磁共振测井技术提高疑难储层解释符合率

APPLICATION OF NUCLEAR MAGNETIC RESONANCE LOGGING TECHNOLOGY IN IMPROVING THE INTERPRETATION CORRESPOND RATE OF DIFFICULT RESERVOIRS

核磁共振测井技术是一种全新的储层评价测井技术，可以准确的测量地层内的有效孔隙度，并且可以区分不同的孔隙成分，精确地计算地层孔隙度、渗透率、含油饱和度等，有效评价地层孔隙结构特征，从而准确区分流体性质；同时也可以利用差谱和移谱特征辅助判断储层流体性质。本文介绍了核磁共振测井在评价复杂油水关系、低孔低渗、低阻油气层、复杂岩性等疑难储层中的应用效果；还介绍了一种新的核磁处理方法一MRPPs法，该方法是根据搜索到的T1、T2来确定地层含烃饱和度，去除了电阻率对含烃饱和度的影v向，在识别低阻油气层中具有独特的效果。

Nuclear magnetic resonance logging is a new technology for reservoir evaluation.It can measure effective porosity of the formation accurately,distinguish different pore composition,and calculate formation porosity,permeability,oil saturation etc.so as to distinguish fluid property.It can also help to judge reservoir fluid property based on the characteristics of differential spectrums and drift spectrums.The paper introduces the application effect of nuclear magnetic resonance logging in evaluation of difficult reservoirs with complicated oil-water relationship,low porosity and low permeability,low resistivity or complex lithology.It also introduces a new NMR data processing method MRPPS,which can help to determine the hydrocarbon saturation according to the searched T1,T2 without the effect of resistivity and especially suitable for low resistivity formation.