... to successful drilling is to predict optimal mud weight windows for safe and stable ERD wells with a casing plan to drill the critical buildup section from 30° to 75° through overlying shales. The in-situ stress profile is built and further calibrated with closure pressures obtained during extended leakoff...

... Abstract Reservoir depletion alters formation pressure, far-field in-situ stresses, and stresses around the wellbore. All of these factors influence collapse and fracture gradients, and therefore the drilling mud weight window. For deviated wells in depleted reservoirs, this situation is even...

... of the mechanical properties and in-situ stresses of the subsurface formations is important, as it provides insights to the determination of optimal mud weight window, stable well trajectories, casing set points so as to minimize wellbore stability related problems. The data required is obtained from a suite...

.... Higher compressive stresses were found in supra-salt minibasins and sub-salt concave-down embayments, resulting in higher mud weight windows. Areas below convex-down allochthonous base salt show lower compressive stresses, resulting in narrow mud weight windows. A fast well planning tool has been...

...Background During drilling, the safe mud weight window is defined as the pore pressure gradient (on the low end) and the fracture gradient (on the high end). The goal of real-time pressure management involves selecting and maintaining the downhole drilling fluid pressure within the drilling...

... Upstream Oil & Gas strength Exhibition spe annual technical conference investigation Texas wellbore instability mud weight window instability permeability drilling operation fractured formation disadvantage stress cage annular pressure drilling casing and cementing complex reservoir...

... of the reservoir continuity in Sand 2, and confirmation of the column height in the new reservoirs using formation testers. Following these procedures, the determination was made to run a 7-in. liner. This plan not only required that the well be stable, but also that a sufficiently safe mud weight window...

... consideration wellbore integrity mud pressure wellbore design instability spe 56758 depletion drilling fluids and materials reservoir characterization mww basin upstream oil & gas mud weight window reservoir geomechanics society of petroleum engineers mud weight strength...