Closed chamber testing enables the calculation of inflow fluid volume as a function of time by monitoring surface pressure. It also allows the measurement of the smallest flow rates with pinpoint accuracy, with flow rate and pressure data calculated to 1 kPa.
These tests are conducted with the tool string in the hole and the surface valve closed to create a closed chamber of known volume. By eliminating flaring, a closed chamber test offers the additional benefits of added data security, minimized environmental impact, and safety.