单井化学示踪剂测残余油饱和度段塞解释模型

PLUG INTERPRETATION MODEL FOR SINGLE WELL CHEMICAL TRACER MEASURING RESIDUAL OIL SATURATION

单井示踪剂法测试残余油饱和度技术是一种精度较高的测试方法 ,探测深度大且具有控制探测深度的能力。经实验室试验证实 ,示踪剂测试精度为 2 %～ 3%孔隙体积 ,可满足老油田水驱开发和三次采油评价等工作的需要。首次提出了段塞注入解释模型 ,适用于单层、关井期间地下示踪剂带无显著漂移的矿场试验解释。模型中考虑了试验段塞注入条件和注入液中含有次生示踪剂的校正。应用此解释模型 ,测试费用低 ,解释精度高。

The technology of single well chemical tracer measuring residual oil saturation is a kind of measuring methods with high accuracy. It has the ability of deep inspection depth and the ability to control inspection depth. Proved though laboratory tests, tracer's measuring accuracy is 2%~3% pore volume, which can meet the requirements of waterflooding development of mature oilfields and evaluation of tertiary recovery. The paper puts forward plug injection interpretation model in the first time, which can be applied into field tests interpretations on underground tracer belt without outstanding drift in monolayer and during the time of shut-in. The model is considered of the condition of test plug injection and the emendations of secondary tracer in injection fluids. Appling of this interpretation model can reduce inspection cost and improve interpretation accuracy.