单井化学示踪剂测残余油饱和度无漂移段塞解释模型(一)

INTERPRETATION MODEL OF RESIDUAL OIL SATURATION MEASURED WITH SINGLE WELL CHEMICAL TRACER-ONE LAYER NO SHIFT SLUG MODEL

单井化学示踪剂法测残余油饱和度,具有探测深度大(3～12m)、精度好等优点,能够满足老油田水驱开发和三次采油评价等工作的需要。此项测井技术被认为是残余油饱和度测试的首选方法。本文给出了一个常规解释模型,适用于关井期间地下示踪剂带无显著漂移的矿场实验结果的解释与数值模拟结果对比,解释误差小于1%孔隙体积。简化该模型得到两个物理过程相对简单的解释模型—脉冲模型和概念模型。

It has the advantages of wide range of measure depth (3-12m), and high accuracy to measure residual oil saturation by single well chemical tracer method, which can meet the requirement of evaluation works in water flooding and enhanced recovery. This well test technique is generally regarded as the first selection chosen to measure residual oil saturation. The conventional interpretation model presented in this paper applies to interpretations of those field test result in which no significant shift occurs during shut-in period. Through simplification, the model can be transformed into a pulse model and a concept model with relatively simple physical process.