PREDICTION OF SURGE AND SWAB PRESSURE PROFILE FOR FLOW OF YIELD POWER LAW DRILLING FLUID MODEL THROUGH ECCENTRIC ANNULI
Abstract:
The accurate prediction of surge and swab pressures during drilling operations is crucial for optimizing wellbore stability and minimizing the risk of formation damage. In the context of drilling fluid flow through eccentric annuli, the rheological behavior of the fluid plays a significant role in determining the pressure profile.
This study focuses on predicting surge and swab pressures for the flow of drilling fluids modeled using the yield power law rheological model through eccentric annuli. The yield power law model considers the non-Newtonian behavior of drilling fluids, which exhibit both shear-thinning and yield stress characteristics. The eccentricity of the annulus introduces additional complexity to the flow behavior, leading to variations in pressure distribution.
To predict the surge and swab pressures, a mathematical model is developed based on the conservation equations of mass and momentum, considering the geometry of the eccentric annulus and the rheological properties of the drilling fluid. The model incorporates the yield power law rheological model to capture the non-Newtonian behavior of the fluid.
Numerical simulations are performed using the developed model to investigate the pressure profile during surge and swab operations. The simulations consider different eccentricity ratios, flow rates, and rheological parameters to analyze their effects on the pressure distribution. The results provide insights into the influence of these parameters on surge and swab pressures, facilitating the optimization of drilling operations.
The proposed model and simulation results contribute to a better understanding of surge and swab pressure profiles for the flow of yield power law drilling fluids through eccentric annuli. This knowledge can aid in the design of drilling operations, including wellbore cleaning, casing running, and cementing, by providing guidelines to mitigate risks associated with pressure differentials. Furthermore, it can assist in optimizing drilling parameters to enhance overall drilling efficiency and wellbore stability.
PREDICTION OF SURGE AND SWAB PRESSURE PROFILE FOR FLOW OF YIELD POWER LAW DRILLING FLUID MODEL THROUGH ECCENTRIC ANNULI. GET MORE OIL AND GAS/PETROLEUM ENGINEERING PROJECT TOPICS AND MATERIALS
