Scale Prediction and Field Application of ASP Flooding Production Well

The scaling of produced Wells is one of the main problems faced by ASP flooding technology. At present, the determination is mainly based on the pH value of produced liquid and the concentration of scaling ions. There are many problems such as too many discriminant parameters, subjective factors and difficult operation. Therefore, in this paper, the main components of scale were determined by scale sample analysis. Based on Oddo-Tomson saturation index method, the prediction method of calcium scale formation in ASP flooding was established by modifying with the temperature, pressure, pH value and ionic strength of the produced liquid, which could quantitatively predict the scale situation of mechanical production well, so that the scale prediction could achieve a quantitative description. Through the field application of saturation index scaling prediction technology, the detection period of ASP flooding block reached 598 days, extending 133 days. Pump detection rate was 30.2%, down 13.4 percentage points.