![]() To check pressure equilibrium and thus homogeneity wells can be tested using wireline-conveyed tools, either in casing or open-hole. Multi-point tests are used to establish gas well deliverability and absolute open flow potential Single-point tests typically involve a measurement or estimate of initial or average reservoir pressure and a flow rate and flowing bottomhole pressure measurement. Other flow tests, such as single-point tests and multi-point tests, are performed after the well has been cased. A DST is used to obtain reservoir fluid samples, static bottomhole pressure measurements, indications of productivity and short-term flow and pressure buildup tests to estimate permeability and damage extent. ![]() Some flow tests, such as drill stem tests (DSTs), are performed in the open hole. Confirming heterogeneities and boundariesĪ Flow test is an operation on a well designed to demonstrate the existence of moveable petroleum in a reservoir by establishing flow to the surface and/or to provide an indication of the potential productivity of that reservoir.Estimating the average reservoir pressure.Identifying heterogeneities and boundaries.Evaluating the well permeability and skin effect.Non-Darcy coefficient (multirate tests).Well tests, if properly designed, can be used to estimate the following parameters: To perform a well test successfully one must be able to measure the time, the rate, the pressure, and control the rate. Most well tests consist of changing the rate, and observing the change in pressure caused by this change in rate.
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