Effect evaluation of chemical paraffin control in Baibao oilfield

Solid paraffin inhibitor can inhibit wax deposition on the tube, rode, pump in paraffin troubled well, prolong the pump inspection cycle and reduce energy consumption of pumping unit. The effect of wax prevention was evaluated by changing paraffin inhibiting ratio and wax precipitation point with oil wax deposition rate tester and dynamic rheometer. The relation of pump inspection period, dissolving rate and paraffin inhibiting ratio was calculated, which could predict effect of paraffin inhibitor in the bottom of oil well. System efficiency tester was used to test the electric parameter through the pumping unit motor operation and the load with the sensor installed on the beam hanger of pumping unit. Paraffin control effect was evaluated according to the diagrams tested in paraffin troubled well. The results of field tests showed that the loading of oil well could be lower 9.73 kN by solid paraffin inhibitor, the system efficiency raised 6.92% and integrated energy-saving rate was 22.23%.