Download Our Detailed Outline about the Ocondi Universal Wellhead Automation (UWA)
A Wellhead SCADA with One-Second Trend Data Logger
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Functional features of a SCADA system. A typical SCADA/RTU installed at the well site facility can measure oil, gas, and water production. It can read or sample analog data of static or line pressure (P), differential pressure (DP), and line temperature (T), which provide the parameters for gas flow calculation that comprise an Electronic Flow Measurement (EFM) system. Other analog data, such as tubing and casing pressure, provide reservoir pressure data as well as liquid-load data needed to affect deliquification process control and reservoir analysis. Storage tank levels are continuously monitored for tank hauling management and spillage prevention.
EFM/RTU. A typical SCADA/RTU calculates volume of gas flow per hour based on the AGA (American Gas Association) formula as follows:
Q = C , Q = gas volume, C’ = Constant, P = Static Pressure, DP = Differential Pressure
P, DP, and T, are sampled and flow volume is calculated every second. The hourly average of one-second data of the calculated volume of Q, along with the analog trend data of P, DP, and T, are stored in the RTU’s archive. The hourly trend data are transferred to the host computer on an hourly scan by the host system. The hourly average trend data of P, DP, and T, are accepted by BLM and API standards as audit-trail per API Section 21.1.