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硼中子寿命测井是用硼元素作为示踪剂 ,直观评价射孔层内的水淹级别 ,估算油层剩余油饱和度的一种方法。由于层间矛盾的影响 ,低压“倒灌”层在原硼中子寿命测井中易被解释为水淹层。通过把硼中子寿命测井施工工艺由原来的“测 -注 -测”改为“测 -注 -测 -扩散 -测” ,将测取的注硼后不同状态下的硼中子俘获截面曲线进行对比、分析 ,可以合理解释低压层 ,基本解决了由于“倒灌”存在而导致误解的问题
Boron neutron lifetime logging is a method of using boron as a tracer to visually evaluate the level of flooding in a perforated layer and estimate the remaining oil saturation. Due to the influence of interlayer contradiction, low-pressure “backfill” layer is easily interpreted as water-flooded layer in the original boron neutron lifetime log. By changing the boron neutron lifetime logging construction technology from the original “test - injection - measurement” to “measurement - injection - measurement - diffusion - measurement”, the measured boron neutron capture cross section Curve comparison, analysis, can reasonably explain the low-pressure layer, the basic solution to the problem of “misuse” caused by the existence of “intrusion”