INTELLIGENT WELL TESTING SYSTEM

A method and apparatus for characterizing reservoir properties when producing formation fluids from a subsurface formation by releasing material(s) with distinct signature(s) into the formation fluids, allowing said material to flow through the reservoir with the formation fluids, registering the receipt of said material in a downhole well testing system or on surface of a production well, and determining the time, distance and direction of travel for the said material and using these parameters to determine permeability and/or mobility in the relevant direction of flow in the reservoir. Formation fluids can be collected in sample chambers at in situ conditions and/or be brought to surface and/or be injected into an adjacent permeable formation. Upon completion of a well test, the formation fluids may be re-injected into the formation it was produced from. The well testing system further includes downhole sensors for measuring parameters characterizing the formation fluids and a two-way communication system for transmitting information to surface. The well testing system may receive commands from the surface and transmit information to associated well testing devices within a formation of interest. The solution further includes a system capable of performing multiple, near wellbore sidetrack drilling operations simultaneously.