... Abstract Fluid penetration from water-based muds into shale formations results in swelling and subsequent wellbore instability. Particles in conventional drilling fluids are too large to seal the nano-sized pore throats of shales and to build an effective mud cake on shale surface and reduce...

... log analysis well logging alteration spe 123865 wireline tool water-based mud shale formation slowness monopole source sonic tool Upstream Oil & Gas sonic log receiver slowness resistivity wellbore LWD data khz source receiver array Introduction Using the definition...

... Abstract A critical property for many water-base muds is the ability to prevent near-wellbore pore pressure increase in shales. By slowing or preventing this pressure rise, a true overbalance pressure is maintained, which promotes wellbore stability. Using a device that simulates downhole rock...

... management & disposal drilling fluid formulation lubricant gal assembly society of petroleum engineers Upstream Oil & Gas weighted pill tight spot reservoir section spe 101922 water-based mud drilling operation shaker high step-out ratio well successful drilling torque lubricant pill...

...Environmental Compliance in the Outer Continental Shelf of Gulf of Mexico Abstract A uniquely designed water-based mud (WBM) was used in two shelf areas of the Gulf of Mexico to drill highly reactive gumbo sections. The drilling performance and inhibition in these shale intervals resembled...

... interests of Arco, BP, and Exxon. Sixty additional development wells were planned to develop the field on 80-acre spacing. The exploration wells were drilled and cored using various water-based muds, most commonly typical Prudhoe Bay low solids non-dispersed water-based mud and coring fluids. They were...

... pipe risk gulf independent variable simulation spe 28298 hole section pipe water-based mud mud model oil and gas pipe probability drilling fluid selection and formulation oil-based mud machine learning discriminant analysis drilling fluid formulation drilling operation...

... technology in the past, the environmental constraints placed on these systems add many directly related operational problems and costs. P. 405^ mud weight water-based mud synthetic-based drilling fluid offshore gulf daryl cullum drilling fluid synthetic system drilling fluid property drilling...

.... Mud companies have identified replacements for diesel and mineral oils in lubricants and spotting fluids that combine performance and environmental acceptability. Non-chloride potassium sources have replaced KCI in many water-based muds. New cationic polymer muds are being touted as replacements...

.... It is shown how this may be used for reliable extrapolation of surface measurements to downhole conditions for well-circulated water-based muds. Introduction The successful prediction of frictional pressure drops and of cuttings settling velocities and transport in the annulus is crucially dependent...

... the Tertiary and into the Cretaceous, Jurassic and Triassi formations of the Mesozoic. Various authors have described the economic benefits of oil-based mud over the more conventional water-based muds. G. J. Edelbrock et al, in particular gave an analysis of the problems encountered in drilling Statfjord...