... or a "campaign". It is recommended that before a "campaign" of wells are drilled, the calculation of threshold reserves necessary to payout development work be made. material balance approach drillstem testing placement permeability gas reservoir derivative function guide business decision...

... to degrade the concentrated polymer, the fluid rheology is compromised and the placement of the proppant could be jeopardized. Encapsulation of the breaker has allowed the placement of elevated concentrations of breaker within the proppant pack and a controlled release after the proppant is placed...

... for the horizontal hole. The surface location was determined from 3D seismic, which was used to map the Keq River structural surface. A comprehensive formation evaluation program including coring, logging and drill stem testing was conducted in the vertical pilot hole, which contributed to the successful placement...

... are created when gas enters the slurry before cement is fully set or when severe chemical contraction takes place after the cement is set 3 . During the cement placement, application of 2 to 3 KPa/m excess pressure gradient above the gas pore pressure gradient will prevent gas entry into the cement slurry...

... precise thickening times, these slurries also exhibit excellent fluid loss control and very low rheological parameters. This latter property allows convenient turbulent flow placement in even relatively large annulus configurations. A laboratory study was made in order to determine the optimum salinity...