A review of effects of oil-well parameters in estimating annular pressure losses

Abstract EN

Good hydraulics plays a vital role in the drilling of oil wells.

Important aspects of drilling hydraulics include prediction of downhole circulating pressures and equivalent circulation densities.

Such predictions become more essential as drilling operations complicated.

Horizontal, extended reach, slim hole and deep offshore drilling pose extra difficulties for safe drilling operations because of the narrower window between formation pore/fracture pressures.

Demand for excellent predictions of annular frictional pressure losses and equivalent circulation densities become ever greater.

Unfortunately, current pressure loss predictions are not accurate and reliable.

Many wellbore parameters that are pertinent downhole are ignored in these relations which hamper excellent pressure loss estimations.

The main purpose of tliis paper is to shed the light 011 the effect of these parameters 011 annular pressure loss and equivalent circulation densities during drilling with incompressible drilling fluids.