IMPROVED WELL TESTING SYSTEM

摘要

A well testing system and well testing method is described which can be operated as a closed system with no production of hydrocarbons outside the well with the liquid hydrocarbon being re-injected. This is achieved by providing a string with at least two well conduits. One conduit is used to produce formation fluids to surface or to produce/store unrepresentative initial flow products and the other conduit is used to store formation fluid. A flow control valve is provided at the lower end of the string or at surface and the size of the valve opening is controllable to allow formation fluid to enter the storage string at a controlled rate, so that the formation fluid flowing time is increased to maximise the radius of investigation into the formation to a similar order of magnitude of existing production test and extended well tests.