Welltest 102: Production Test Reporting

Frac’ sand returns (an abrasive) should be eliminated, before running subsurface pressure recorders. Load fluids should be minimized, before conducting a single or multi-point test gas (#LNG) #welltest. Clean-up gas volumes are important for welltest analysis (#PTA) and reservoir engineering.

Flow interruptions (choke changes, backpressure adjustments, orifice plate changes, well shut-ins) should be minimized throughout single point or extended production flow tests. Modified isochronal tests should have consistent flow/shut-in periods, without changes.

Sampled gas properties should be input for correct gas flow rate and volume calculations.

Incremental and cumulative flow time should be shown on the table for analytical usage. Meters should be zeroed appropriately for correct gas volume and flow time calculations.

Load fluids left to recover (LFLTR) should be tracked carefully for analytical purposes.

Daylight savings time changes should NEVER be adjusted during a test. Production tests MUST terminate in whatever time standard the test was started in. This particular problem causes significant excesses in processing and reporting time and thus costs.