In Canada, petroleum well testing is mandated and controlled by provincial boards, each with a variety of rules, regulations, and submission requirements: Alberta Energy Regulator (AER)British Columbia Oil and Gas Commission (BC-OGC)Saskatchewan Industry and Resources (SIR)
In Canada, petroleum well testing is mandated and controlled by provincial boards, each with a variety of rules, regulations, and submission requirements: Alberta Energy Regulator (AER)British Columbia Oil and Gas Commission (BC-OGC)Saskatchewan Industry and Resources
Differentials should be created for both #welltest pressure and temperature traces, for quality control and data validation. Liquid shifts are most clearly exhibited by differential diagnostics. Drift is also evident from the differential. Every effort should be undertaken to
Temperature data are a primary #welltest measurement (i.e. not calculated like pressure data) and should be examined for quality control and anomalies. Temperature data are a good indicator of wellbore and reservoir characteristics. Joule-Thompson cooling
Pressure buildup data should always be examined for #welltest analysis (#PTA) quality control and anomalies. Several phenomena might cause data anomalies immediately after shut-in. Phase redistribution (gas going back into solution) can cause a hump
Most often the initial pressure is just before purging portable production test facilities. This operation usually causes one of two patterns. If the wellbore is gas filled, a characteristic drawdown spike occurs. If there is liquid in the hole,
When #welltest recorders are run into a well they are measuring pressure vs. time (Dp/Dt). Liquid levels can be observed based on changes in the slope. Approximate liquid levels can be calculated assuming a constant running speed (Dd/Dt). This
Pressure recorders are available in two basic types: strain gauges for general usage and quartz gauges, with higher resolution, where better accuracy is required. Strain or quartz elements provide a primary amplitude signal, from which pressure is inferred.
Braided electronic wireline (e-line) instruments include open hole logs (sonic, neutron) and production logs (pressure, temperature, and gradiometer recorders, and flow spinners), or even video cameras. For welltesting, pressure recorders (bombs) are the primary slickline instrument.
Wireline (Slickline) is one method of running various measuring instruments and tools into petroleum wellbores. Basically, subsurface devices are attached to the end of a long spool of wire, instruments are then lowered down hole and winched back up.