A novel technique for the modeling of shale swelling behavior in water-based drilling fluids

Abstract One of the most significant problems in oil and gas sector is swelling shale when it comes contact with water. The migration hydrogen ions (H + ) from water-based drilling fluid into platelets formation causes to swell, which eventually increases size sample makes structure weak. This results wellbore instability problem that ultimately reduces integrity a wellbore. In this study, was modeled using potential first order kinetic equation. Later, minimize its shortcoming, new proposed model formulated. based on developing third degree polynomial equation used percentages obtained through linear dynamic swell meter experiment performed fluid. These indicate hourly change during contact. variables are dependent time between mud sample, temperature environment, clay content experimental percentages. Furthermore, also comprises adjustable parameters fine-tuned such way function best fitted datasets. MAE (mean absolute error) present model, namely Scaling found be 2.75%, Swelling has better performance than kinetics terms predication. Moreover, helpful predicting onset direct each other. both cases, percentage deviation initiation close 10%. information will extremely forecasting tendency particular mud. Also, helps validating meter.