Abstract: A system and method is provided that determines at least one bottomhole condition during flowback operations in a well that traverses a hydraulically fractured reservoir. The system and method measure fluid properties of fluids produced at a surface-location of the well during the flowback operations. A transient fluid flow simulator determines composition and properties of fluids in the well between the surface-location of the well and at least one bottomhole-location of the well based on the measured fluid properties. At least one bottomhole condition in the well is determined based on the composition and properties of fluids in the well between the surface-location and at least one bottomhole-location of the well.

Abstract: A system and method is provided that determines at least one bottomhole condition during flowback operations in a well that traverses a hydraulically fractured reservoir. The system and method measure fluid properties of fluids produced at a surface-location of the well during the flowback operations. A transient fluid flow simulator determines composition and properties of fluids in the well between the surface-location of the well and at least one bottomhole-location of the well based on the measured fluid properties. At least one bottomhole condition in the well is determined based on the composition and properties of fluids in the well between the surface-location and at least one bottomhole-location of the well.

Abstract: A flowback system and method employ a flowback model that characterizes fluid properties and rock mechanical properties of the reservoir during flowback in conjunction with measurement and analysis of chemistry and solids production with respect to the flowback fluid in order to maximize efficiency during the flowback operations, while mitigating formation damage and hydraulic fracture conductivity degradation. The methodology can define a safe drawdown operating zone for conducting flowback operations.

Abstract: The method of the invention optimizes the development of a heterogeneous porous medium using enhanced recovery of a fluid by fast determination of position of a front separating a sweeping fluid and the fluid in the medium having application for development of oil reservoirs or gas. The velocity field of the front is determined only once with a flow simulator. A relation describing the position of the front in the heterogeneous medium is defined. Velocity fluctuations are accounted for in the direction of the front and the velocity fluctuations in the direction perpendicular to the direction of the front. For each time interval, the position of the front is reconstructed with a fast Fourier transform and injection of the sweeping fluid is optimized according to the position of the front.

Abstract: The method optimizes the development of a heterogeneous porous medium within the context of enhanced recovery of a fluid in place, by fast determination of the position of the front separating a sweeping fluid and the fluid in places having application for development of oil reservoirs or gas. The velocity field in the neighbourhood of the front is determined only once by means of a flow simulator. Then a relation describing the position of the front in the heterogeneous medium is defined by freedom from the viscous coupling by means of the perturbation theory, and by accounting for the velocity fluctuations in the front advance direction and the velocity fluctuations in the direction perpendicular to the front advance direction. Finally, for each time interval, the position of the front is reconstructed by means of a fast Fourier transform and injection of the sweeping fluid is optimized according to the position of said front.