Abstract: A method for estimating properties of a subterranean formation penetrated by a wellbore provides for injecting a fluid with the plurality of tracer agents wherein each tracer agent is an object of submicron scale, into the wellbore and formation, flowing the fluid back from the subterranean formation and determining the properties of the formation. The properties are determined by analyzing changes in the tracers size and type distribution function between the injection fluid and produced fluid.

Abstract: Method comprises measuring temperature along an injection well, measuring a steam quality and an injection rate at an inlet of the injection well and estimating a pressure distribution profile. Then a steam injection profile is estimated using the obtained pressure distribution profile and the measured injection rate combined with a one-dimensional injection well model for pressure losses in the well and heat exchange between an injection well tubing and an annulus. The obtained steam injection profile is used as an input parameter for a set of two-dimensional cross-sectional analytical SAGD models. The models are based on energy conservation law and take into account reservoir and overburden formation properties, heat losses into the reservoir and overburden formation impact on production parameters and SAGD characteristics. SAGD process characteristics are estimated from the set of two-dimensional cross-sectional analytical SAGD models.

Abstract: A method for estimating properties of a subterranean formation penetrated by a wellbore provides for injecting a fluid with the plurality of tracer agents wherein each tracer agent is an object of submicron scale, into the wellbore and formation, flowing the fluid back from the subterranean formation and determining the properties of the formation. The properties are determined by analyzing changes in the tracers size and type distribution function between the injection fluid and produced fluid.