Page 125 - Intelligent Digital Oil And Gas Fields

92 Intelligent Digital Oil and Gas Fields

Table 3.2 Raw Data Frequency and Down Sampling Data for Production and Reservoir
Engineering Studies
Down Sampling Engineer Study and
Raw Data Natural Data Frequency and Summarizing Evaluation
CHP, THP, Every second for Few seconds Real-time production
FLP orifice, Venturi, and and pump
Q g , Q o , temperature-pressure monitoring; flow
Q w ,DTS gauges, etc. profiles
Few seconds for 1min Generate warning
turbine, vortex message if pump
meters values are deviated
Few minutes for 1h Generate alarm if
Coriolis and MPF production issues
meters persist for >1h
1day Well performance
(nodal analysis),
RTA, DCA, etc.
1week
1month DCA, MBE, 3D
numerical model,
economic analysis
1year Financial calculations
Downhole Deciseconds No down PTA
BHP-BHT sampling RTA
1h
Downhole Deciseconds Fracture diagnostics;
DAS proppant
placement;
multiphase flow in
tubing
With contributions from Doug Johnson.

total rates of the day and are used for allocation and decline curve analysis
(DCA). Wellhead pressure is taken before and at the end of the test.
• Intermediate frequency data. The pressure, temperature, gas, oil, water rate
data are taken every hour and then summarized to daily averages. In this
category, the hourly to daily formats are suitable to perform RTA, allo-
cation, and early time DCA, which depends strongly on independent
measurement of oil, water, and gas per hour. In at intermediate frequen-
cies, the data relies rely on constant calibration of pressure gauges and
flowmeters.