Thermal Well Cleanout Automation Research

The thermal well washing work generally consists of the following four steps: pre cleaning, soluble wax, wax and flushing. Hot wash work process, the need to determine the time and the flow rate of the two parameters, so that the washing control, to determine the two parameters according to the oil well scaling and wax, and through the theoretical calculation of hot washing test temperature into the wells in the formula. According to the return water temperature of T1 and T2 to determine the beginning and the end of the well washing work.In Daqing oilfield, a test, test to the return water temperature is 85 DEG C, and 75 degrees, the corresponding heat wash pipe water pressure is 3.1 MPa, set the hot washing parameters after four hours after the operation, six hundred meters deep underground wax can be dissolved,and the effective discharge. The intelligent control system to reduce the thermal washing time,but also can reduce the washing losses, so that each year 86 tons of oil production increase,intrusion phenomenon also can be controlled, the experimental results show that this system has the advantages of simple operation, good stability, and not easy to break.