1. vb. []

To stay on the surface of the formation or a perforation tunnel. When, for example, bead tracers are injected into a well, they will be carried by the injection fluid. Instead of entering the formation with the fluid, the bead tracers will be held, like plates, on the surface.

See related terms: bead tracer,  production log,  radioactive-tracer log,  tracer measurement,  tracer-loss measurement