... Abstract San Andres carbonate reservoirs have long been known to have a high degree of reservoir heterogeneity and poor recovery efficiencies. Fractures are one of several causes of this heterogeneity. The heterogeneity causes unpredictability in water and CO 2 flooding. However, the correct...

... reservoir heterogeneity in lateral direction of the interwell locations. stb day significant effect heterogeneity enhanced recovery saturation residual oil saturation production rate spe 70021 equation permeability oil saturation oil production rate oil recovery upstream oil & gas...

... Abstract Early breakthrough and poor sweep efficiency are common problems in CO 2 floods. These problems result from the large viscosity contrast between the displaced and injected fluids as well as from the heterogeneity of reservoir rock. Evidence shows the presence of an aqueous surfactant...

... to be unwarranted in a waterflooded environment. Future history matching of the performance will allow better forecasts and evaluation of the economic impact available with this underutilized process. saturation waterflood upstream oil & gas porosity mechanism initial result heterogeneity...

... for highly non-linear hemispherical llow. Previous studies have presented geometric factors for homogeneous porous media. Naturally occurring porous media are rarely homogeneous. Some heterogeneities are natural, others are created during drilling (formation damage) and some during subsequent core handling...

.... The proposed technique can be used to greatly reduce the uncertainty of predicting future reservoir performance. reservoir description variogram constraint performance constraint well performance production data waterflood performance heterogeneity reservoir characterization upstream oil...

... by the inverse model, isolated infill locations were suggested in the pilot area. The incremental oil recovery of various schemes of infill and waterflood are compared. It appears that infill drilling locations selected with scientific criteria do improve the oil recovery of a very heterogeneous reservoir...

... model in the development of perme-ability and porosity distributions for input to fluid flow simulators. 12 , 16 Traditional contouring, whether by hand or computer mapping packages, of permeabilities and porosities, often understates the true heterogeneity of the reservoir. Hand contouring relies...

... to Journel and Huijbregts (1978) and Fogg and Lucia (1990) . The variogram describes variability as a function of distance between measurements. Spatial permeability characteristics can often be described by the nugget, the correlation range, the sill, and the variogram model. Small-scale heterogeneity...

... Abstract A study has been made and a series of charts are provided so that one may estimate the swept areas after breakthrough in flooding or cycling heterogeneous reservoirs. It is well known that reservoirs are not uniform and homogeneous, nor do they exist in uniform layers without...