Nine companies participated in this artificial modeling study of gas cycling in a rich retrogradegas-condensate reservoir. Surface oil rate predictions differ in the early years of cycling but agree better late in cycling. The amount of condensate precipitated near the production well and its rate of evaporation varied widely among participants. The explanation appears to be in K-value techniques used. Precomputed tables for K values produced rapid and thorough removal of condensate during later years of cycling. Equation-of-state (EOS) methods produced a stabilized condensate saturation sufficient to flow liquid during the greater part of cycling, and the condensate never completely revaporized. We do not know which prediction is more nearly correct because our PVT data did not cover the range of compositions that exists in this area of the reservoir model.
Reservoir engineering (and simulation) have historically paid little attention to the geomechanical behaviour of porous media. However, a number of important (primarily unconventional) recovery processes can be properly engineered only by including this effect (e.g., thermal recovery in oil sands, compaction drive in soft and unconsolidated reservoirs, chalk reservoirs, stress sensitive and microfractured media, waterflooding at fracture pressure, waste injection, coal seam stimulation, etc.). In addition, analysis of drilling and completion problems such as wellbore stability, sand production, fracturing or casing failure require knowledge of geomechanical behaviour of the reservoir. This paper gives an overview of the geomechanics of reservoir behaviour, describes recent advances in coupled reservoir and geomechanical modeling and presents case studies of field applications of this new tool. The examples show the potential of the coupled modeling to become a comprehensive tool for integrated reservoir management including reservoir, production and drilling aspects of field development. In each case, the use of the new, more comprehensive tools provided better understanding of recovery mechanisms and changed significantly the economic evaluation of the project.
SPE * 03C+WIIOM 1078.MkW IWtitubo!Mmlno, MWUlurkwl, Ma PwolwmEcqlrwm,Inc. TrwPIW ww pfwwd II m+Mlh AnnwlFall Tcciml.wl l%lownw IndfxttiMliofl ofIhs2wNIYofPOtWIWM EMlnwI 01AIME,MM InLWVOW,Nttark, 2$pttmbtr 23.26,1079, TM 111111111 II wbpclw wtrwnonoylhi wlhof.Pwml:wn 10copyISralrlmtd10w Ibllrlm d notmomMM 2b0wofdl.Writ 6KI0N. C+nlrIlEXW.,WM. WI 7UW. ABSTRACT dimensional problems. This paper deacribee the development of a fully This paper deecribes the development of a fully implictt general thermal model (XSCOM) for simulating irnpli.tit, f.in'lte-difference,
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.