Part of Well & Reservoir Surveillance and one of the Subsurface E&P Disciplines, related to measuring well volumetric flow rate and wellbore pressure in one or few selected wells and analysing pressure-rate correlation.
Unlike production analysis which normally covers a time period from few months to many years, well tests are rather short and normally take from few hours to few weeks.
The quantitative interpretation is based on pressure diffusion model (for reservoir applications) and well completion model (for well integrity applications).
There are different well tests classifications.
One way is to split well tests into two major categories:
The other way is to split well tests by the location where the measurements are taken and the well completion status:
Third way is to split well tests by number of wells involved:
PIST – Pressure Interference Step Test (as version of PTA) | |
PICT – Pressure Interference Pulse Test (as version of PTA) | |
| DST – Drill Stem Test | |
| WFT – Wireline Formation Test | |
| Drawdown Test (DD) (as version of PTA) | |
| Injection Test (INS) (as version of PTA) | |
| Build-up Test (BUS) (as version of PTA) | |
| Fall off Test (FOS) (as version of PTA) | |
MRST – Multirate Step Test (as version of PTA) | |
SPT – Self-Pulse Test (as version of PTA) |
See Also
Petroleum Industry / Upstream / Subsurface E&P Disciplines
[ Well & Reservoir Surveillance ]