Page 113 - Intelligent Digital Oil And Gas Fields

Data Filtering and Conditioning 81

and
Surface pressure, psi
7000 6500 6000 5500 Frozen data 5000 4500 4000 3500 3000 2500 2000 1/2/2015 2:24 data, frozen

Data frequency: 1 min Period: 24 h Data points: 1440 points Average gas rate: 8300 Mscf/d Average surface pressure: 4480 psi Uptime: 90% (21.6 h) Data in quarantine if follows physics Data don’t follow physic 1/1/2015 21:36 data, missing out-of-range,

1/1/2015 16:48 spike, data

including
1/1/2015 12:00 Time in min errors

Surface pressure, psi Missing data data many

Data spike 1/1/2015 7:12 showing

Gas rate, Mscf/d Data out of range 1/1/2015 2:24 frequency) (1-min

Data spike data raw data.

12,000 10,000 8000 6000 4000 2000 0 12/31/2014 21:36 Typical 3.2 meaningless

Fig.
Gas rate, Mscf/d