Abstract: In early stage of glutenite reservoir development, it is hard by using conventional dynamic monitoring data to interpret and grasp such issues as direction of reservoir heterogeneity, flowing regularity and availability of injected water, existence of high ermeability zone, efect of fault on water injection, well response, residual oil saturation in high-capacity channels, etc. For these reasons, the micromatter trace tester was introduced in 2002 for its simple and feasible procedure and being independent of reservoir depth, reservoir quality and fluid property. The tracer test has been run in four well groups of complex glutenite reservoirs of Upper W uerhe formation of East District 5-(3) in Karamay oilfield, and the results are in accordance with the actual situation. The interpreted and ascertained percolation and sealing fault in the reservoirs can be as a guide for field injection-production efforts and as a solid basis for further development and adjustment.

Key words: water injection, tracer, monitoring, recognition, application