脉冲中子组合测井在胜利油田中的应用

碳氧比能谱、脉冲中子衰减-能谱、注硼中子寿命以及氧活化测井均属于脉冲中子测井方法.简单介绍了这些测井技术各自的测量原理及应用.针对胜利油田地质情况的复杂性、多解性,阐述了应用组合测井方法可以更好地解决油藏的剩余油分布等问题.使用脉冲中子衰减-能谱测井仪(PND)进行PND和硼中子寿命测井的组合测井方法,利用PND获得的俘获截面曲线作为注硼中子寿命测井的基线.该方法既可缩短施工时间,又可解决单一测井方法无法解决的某些特殊测井问题.介绍了应用这种组合测井在正确识别低压储层、确定储层窜通情况、获得剩余油饱和度、确定储层水淹程度等方面的测井实例.

Application of Combined Pulse Neutron Logging in Shengli Oilfield

Pulsed Neutron Logging methods,except being tentative oxygen activation logging,are very important for development of Shengli Oilfield.Aimed at the geological complicacy and log interpretation often with multiple solutions in Shengli Oilfield,mentioned in this paper is a combined logging method of PND log and boron neutron lifetime log utilizing the Pulsed Neutron Decay-Spectral tool(PND),in which the capture cross section curve acquired by PND is used as the background curve of boron neutron lifetime log.Not only the working time can be saved with the method,but also some special logging problems that are not able to be solved by single logging method will be solved.Several case histories with the combined logging method are introduced,such as correct identification of low-pressure reservoir,reservoir channeling determination,residual oil saturation acquisition,waterflood grade determination,etc..