Automatic monitoring of the hottest oil field from

2022-08-04
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Oilfield Automation Monitoring - the operation of each unit in the combined station of the oil production plant from the wellhead to the combined station (Part 2)

must be adjusted according to the low daily production cost. Therefore, it is necessary to coordinate the control parameters of various control functions, such as pump set, valve set, dosing, filter, etc. To complete this function, g4lc32 controller is still selected. Multiple controllers are connected by using industrial Ethernet. The communication between the operation station and the controller is also completed by the controller. The same is true for the general monitoring data transmission located in the central control room of the combined station

the operation station provides device level coordinated control and man-machine interface of central control room and metering stations outside the station. This is a set of distributed supervisory control and data acquisition system (SCADA), which can display the working status of each equipment in a graphical way. The operator can also observe the condition of the whole oil production plant from the PC. There are general view, single well condition, metering station and other equipment group drawings. The display data include the real-time process values of flow, water level, pressure and energy consumption, so as to speed up the construction of Yangpu Port deepwater berth. It also includes alarms, variable calculation (such as output calculation and cumulative export time), reports and real-time and historical trends

under the coordinated control, the data of each device can be combined to obtain a continuous report on the status of the oil production plant. The operator can intervene in the local control process and start the manual control - such as closing the valve, starting the pump, starting the motor, etc

the general view and relevant detailed flow charts provide data, real-time and historical trends and measurement data archives of the pipeline and oil production plant, from which the operator can learn about the situation. The operator can also observe the monitoring operation at each device level. The central control system can also generate system alarm reports, shift records and daily operation records

the principle of being responsible for ourselves for a single well 1. Further pumps and valves that go straight can also be operated in the central control room. When the equipment needs to be adjusted, it saves the cost of sending a team down to the wellhead every time

II. Conclusion:

before the installation of this system, the only automatic control function of an oil production plant in a desert oilfield was some loop regulators scattered in various devices, and now the control of more than 100 oil wells in the oil production plant and the oil and gas processing and gathering system in the combined station is completed by a set of multi-level hierarchical structure, modern and exquisite monitoring system, supplemented by a set of Radio all-weather four remote system. Because of the standard industrial network protocol, the system is easy to expand to meet the increasing needs. In fact, the implementation of the oil field is completed step by step. First, the units with existing conditions and the parts with strong urgency are completed, and then proceed step by step according to the conditions of on-site process units. In this way, the oil field not only has the budget eased, but also can see the effect of the system step by step

the operation of each device is very stable. The parameters that used to fluctuate a lot, such as the dosage during dehydration, now fluctuate very little. The stability of system operation represents the stability of dehydration quality

the work of the metering station also greatly reduces manual intervention. It turns out that people must be present after each single well measurement. Single well metering data shall be sent to the oil production plant by meter reading. Now, the metering system can be downloaded from the central control room to the RTU of the metering station. The RTU automatically adjusts the metering time of each well according to the metering system, and automatically performs well and valve switching functions. The measurement data shall be uploaded to the central control room at any time. The central control room can also see through the wireless monitoring system outside the station that the oil pressure and heating test of each single well can complete the oil temperature and casing pressure, which greatly reduces the workload of well patrol inspection

sometimes, there are additional gains from using this system. Originally, the metering (especially water cut) of the export station is once an hour. Since each oil production plant and export are divided into different departments, it is found that when metering, the water cut is very low, but when not metering, the water content in the oil is high, so the oil inlet and output of the export part are different: there is no data support, and the dispute has been going on all the time. After the installation of the system, the continuous sampling and data transmission to the export and central control room at the same time avoid the occurrence of this kind of phenomenon

shortly after the system was put into operation, the oil field also incorporated more than 20 domestic water source wells 20 kilometers away into the system. The expansion work is very simple, only adding a front-end intelligent unit at the wellhead of the water source, and adding an FCS in the central control room to deal with the communication and data from the water source area. Since the water source well has been installed with lines, the communication adopts modem to upload and download data through special lines

recently, the oil production plant is negotiating with the superior department to upload the system to the control room of the headquarters (development company) 250 kilometers away through the Internet

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