...-scale linear coreflood tests in waterflooded cores. The immiscible CO 2 WAG process recovered 15.3% original oil in place (OOIP) with 6.16 MSCF/stb gas utilization. Under a controlled maximum pressure drop across the core, the polymer-alone (0.4 wt%) flood produced an additional 12.93% OOIP above...

...A. Mai; A. Kantzas At the conclusion of primary heavy oil production, significant volumes of oil still remain in the reservoir under depleted reservoir pressure. Waterfloods are often considered for additional oil recovery. It is accepted that conventional oil waterflooding theory is not applicable...

... barrels)(1). Most of these reservoirs are characterized by thin pay (2 to 10 metres in thickness) and shaly sand, and they have been under production for over four to five decades. The estimated average recovery by conventional waterflood, as listed in Table 1, is only approximately 23% IOIP because...

...K.A. Miller Heavy oil waterfloods have been operated in Saskatchewan and Alberta for up to 50 years, yet remarkably little discussion of the theory or operation of heavy oil waterflooding has been published. Conventional waterflood theory is based on assumptions that are not encountered in heavy...

... of this cycle. Corefloods were performed to investigate the effect of waterflood residual oil saturation and injection gas composition (CO 2 and enriched flue gas) on oil recovery. Incremental oil recovery was observed to be sensitive to waterflood residual oil saturation and to the process application scheme...

..., these coreflood results indicate that ASP flooding is a suitable enhanced oil recovery method for medium oil if the right chemical concentration and slug size are selected. Introduction The use of ASP flooding to recover oil left behind by waterflooding has become more common in recent years. Several significant...

...S. Huang; M. Dong Most of the medium oil reservoirs in southwest Saskatchewan are in thin pay zones of less than 8 m. Primary and waterflood methods have reached more than 80% of their estimated oil recovery potential. These medium oil reservoirs are basically untouched by enhanced oil recovery...

... waterflood for some moderately viscous oils. Flue gas injection for heavy oil recovery received a great deal of attention in the 1960s (7, 8) . However, it has not been studied in detail. A previous comparative study on immiscible gas injection agents for heavy oil recovery showed that CO 2 is the best...

... zone sits on top of the low-porosity Vuggy zone. The latter zone has a higher permeability, and is more extensively fractured vertically, than the Marly zone. These geological features result in a relatively unswept Marly zone after waterflooding. The Marly/Vuggy sequence presents an opportunity...

... for waterflood recovery. How Is Streamline Technology Different From Finite Difference Simulation? In a conventional finite difference simulation, there is a pressure-solve segment and a transport-solve (saturation) segment. In finite difference we solve for pressure then calculate flow based on the pressure...

... be cost-effective in special circumstances. Introduction Much of the heavy oil in Saskatchewan and Alberta is mobile under reservoirconditions to the extent that primary production and waterflooding iseconomically feasible, although the recovery factors are low, 5 to 10﹪ in mostcases. Furthermore...

.... These evolving global issues combined with the ever-declining reserves of conventional crude oils appear to bring a new optimism to enhanced oil recovery (EOR) by gas injection. Added to this optimism are the well-accepted facts that waterflood recoveries from conventional oil reservoirs rarely exceed 40...

... the oil remaining in the reservoirs after primary recovery and waterflooding (secondary) can range from 50 - 60﹪ of the original oil in place (OOIP) in the case of a light oil (30 - 35 ° API), to 90﹪ in the case of a Saskatchewan/California type heavy oil (∼15 ° API). The volume of such "unrecoverable...

... of Canada 1 12 1999 1 12 1999 enhanced recovery thermal method Engineering test 4 Upstream Oil & Gas composition SAGD oxygen requirement steam-assisted gravity drainage situ combustion combustion parameter University requirement reaction waterflood combustion MPa...

...M. Reynolds; J. Sutton; G. Hedberg The Pembina field is the largest oilfield in Canada with in excess of 5,000 current operating wells. The field has been on production for more than 40 years and under waterflood since the early 1960s. In spite of its advanced productive life, this field contains...

... oil field, located in SE Saskatchewan, presented unique challenges in stimulation design. This was due to the binary nature of the reservoir geology and to the maturity of the waterflood. The Midale formation from which hydrocarbons are produced is composed of a dolostone, commonly called the Marly...

...F. Wassmuth; A. Cameron; L. Schramm; K. Taylor; R. Krasey The Pembina Cardium reservoir is the largest conventional oil reservoir discovered thus far in Canada, and has been extensively waterflooded since the late fifties. Operating waterfloods are now reaching their economic limits and improved...

...H.O. Yildiz; M. Valat; N.R. Morrow Waterflood recoveries of a Prudhoe Bay crude oil from Berea Sandstone were determined for two brine compositions used previously in a study of the effect of brine composition on the recovery of Moutray crude oil. These brines will be termed Brine 1 and Brine 2...

... of reservoir management has been practiced when a major expenditure is planned, such as a new field development or waterflood installation. The reservoir management practices in these instances most often were not integrated, i.e., different disciplines did their own work separately. During the last five years...

...T.J. Mullane; P.L. Churcher; P. Tottrup; A.C. Edmunds The Weyburn Unit, located in the southeastern corner of Saskatchewan, has over 80 horizontal wells. These wells are producing from a complex, naturally fractured reservoir that has been on waterflood for over 30 years. Accurate prediction...