Research on foaming ability and foam stability of foaming agent at the temperature and pressure

This paper introduces a simulation evaluation device about foaming ability and foam stability of foaming agent at the temperature and pressure, and evaluates the influence laws of pressure, temperature and depth section on the foaming ability and foam stability. Indoor evaluation results showed that: the pressure had no significant effect on foaming ability but had great effect on foam stability at the condition of temperature and pressure, the foam was more stable with the increase of pressure; the effect of temperature on foaming ability was limited; the effect of temperature on foam stability was smaller under 135 ℃, and was larger above 135 ℃, it meant the foam stability was decreased with temperature; the well depth section pressure had no significant effect on foaming ability and had slight effect on foam stability. The indoor evaluation results were applied to conduct field test in T-19 well, the field test was successful, and gas production rate and water production rate were increased, oil pressure differential was greatly reduced. The field test confirmed the reliability of indoor evaluation method and data, and it could guide the field foam drainage operation.