Looking to Expand your Repertoire? Impulse testing is done without flowing. Impulse tests are used very early in the life of a well, before any flow. Pressure recorders can be run at surface or downhole to the sandface.
Want an Edge on the Competition? Thermal data provide vital welltest diagnostics. Subsurface pressure recorder data includes corresponding sensor temperature data, a vital but underused resource for diagnostics. Welltest 105: Thermal focuses on observations and diagnostics
New to Gas Field Operations? Surface pressure data are a valuable resource. Surface pressure recorders are deployed by the same team that runs Acoustic Well Sounders, often in conjunction. Surface data recorders can also have channels for Production Testing,
New to Oil Field Operations? Acoustic Well Sounders (AWS) help estimate bottomhole pressures in pumping wells. Acoustic well sounders and surface pressure recorders are installed, operated, and maintained by surface data crews, often in conjunction.
New to petroleum Welltesting? Production Testing services clean up and flow test wells. Production testing teams operate a range of equipment from simple one-man flow provers to complicated four-stage separation and multi-phase metering manned 24/7 by tandem crews.
New to the term Wireline? Wireline services run welltest pressure instruments. Slickline operators, equipment, tools, and instruments are intrinsic to petroleum welltesting. Welltest 101: Wireline focuses on topics related to wireline (slickline) deployment of subsurface pressure
Impulse Tests are Useful for many Other Applications. Surface casing-vent tests can be conducted using the closed-chamber method. Closed-chamber drill stem tests. Pre-frac’ evaluations and frac’ falloff tests. Alberta AER Initial Pressure requirements can be achieved with a variety
Exploitation Correlations. Exploitation correlation plots can be developed for specific fields and pools. Enough tests and end-results need to be monitored so correlations can be observed. Eventually these plots are used for making on-site real-time tie-in or fracture treatment
Proving Movable Reserves. In this example a high permeability sandstone overlaid a shale zone. Decline curve analysis indicated natural gas (#LNG) reserves greater than volumetrics could justify. It was hypothesized that the shale gas reserves migrated vertically, due to
Perforation Inflow Distribution Diagnostic (PIDD) Tests. The PID #welltest is analogous to production logging when two or more intervals are perforated. Based on changes to the Dp/Dt slope, gas (#LNG) inflow and AOF ratios can be estimated. Starting with