... that the production enhancement in solution gas process in heavy oil reservoirs is related to other mechanisms such as viscous coupling effects, sand production, wormhole effects, etc. Introduction Primary production of heavy oil reservoirs operating under solution gas drive mechanism exhibits unexpectedly higher...

... oil reservoirs are similar to that in the conventional oil. The liberation of the solution gas and the expansion of the free gas are the main pressure maintenance sources below the bubble-point. Introduction In the primary production of heavy oil, the drive mechanism is generally believed...

.... enhanced recovery Modeling & Simulation foamy solution gas drive heavy-oil reservoir strong foamy solution gas drive reservoir pressure Upstream Oil & Gas viscosity waterflooding Yadali Jamaloei Oil Viscosity injection mechanism primary production unconventional heavy-oil reservoir...

... is gas dissolving into the oil phase and causing swelling and secondary solution gas drive. For higher initial GOR areas, vaporization of oil into the gas phase is the most significant mechanism, and this makes sense because for gas condensate reservoirs, liquids dropping out near the wellbore can...

... fractured reservoirs. Field Country Basin Hydrocarbon Type Reservoir Lithology Drive Mechanism Secondary Recovery/ EOR Technique Ultimate Recovery Factor (%) Altamont-Bluebell USA Uinta Light oil Sandstone Solution gas Microbial injection - Amposta Marino Spain Gulf of Valencia...

.... The improved understanding of CSS may provide insights to heavy oil primary production mechanisms. Background Conventional expectations of primary production, suggest that recovery levels from reservoirs containing high viscosity bitumens (50,000 – 100,000 mPa.s) such as at Imperial Oil's Cold Lake...

... and realistic prediction of tertiary reserves, production rates and associated C02 volumes, based readily available data such as primary production and drive mechanism. 2. The presence of the Minimum Displaceable Oil Saturation (MDOS) and the gas channels in a reservoir is critical to conduct an efficient...

... by gas lubrication effects. In situ formation of foamy oils under solution gas drive INTRODUCTION has been proposed as one of the possible mechanisms responsible for high primary production rate from some Anomalously high primary production rates have been heavy oil reservoirs. Maini et al. (1993...

... designed to develop a correlation model that can estimate recovery factor under both primary and secondary recovery from oil reservoirs in the Niger Delta having water and depletion drive mechanisms. For this study, the models for recovery factor were established using statistical correlation of data...

.... This relatively high recovery level cannot be explained by solution gas drive mechanism alone given the known reservoir parameters of these formations (6,7). The major factors affecting lOR applications in heavy oil could be summarized as follows: 1. Reservoir (quality, thickness, aquifers, gas caps) 2. Oil...

... for the dynamic reservoir simulation. The process mechanism dictates the degree of sensitivity to different fluid properties. For primary process, the production performance is mostly sensitive to saturation pressure (or initial GOR) because solution gas drive and foamy oil drive were the main driving mechanisms...

... b ' was estimated to be 3.5 MPa under the condition of this 1D depletion test. Abstract Solution gas drive from heavy oil reservoirs in the eastern Orinoco Belt, Venezuela presents foamy oil behavior and has shown a primary recovery factor of 8-12%. However, the cold production performance...

... gas saturation that allows gas to flow as a continuous phase is called critical gas saturation. Recognizing that primary production from a solution gas drive reservoir comes in the form of oil continuous foam, the production mechanism is sometimes called foamy solution gas drive ( Maini, 1999...

.... Introduction There are some Venezuelan and Canadian heavy oil reservoirs with a high recovery factor during the primary production under a solution gas drive process. Recently, Sheng et al. 1 published a review on this unexpected behaviour which is different from conventional gas drive concepts...

.... This resulted in downdip injection into a weak water drive reservoir that was nearly depleted. Well primary production was 309 thousand STB of oil. C02 response occurred in August 1984. Reservoir and fluid characteristics are the same as the Lower 9000' RM su except for the drive mechanism and lower reservoir...

... in combination with a strong primary reservoir mechanism as formation compaction in the case of M-6. Upon depletion of the primary reservoir mechanisms the only alterna- tive for further exploitation of heavy oil reservoirs like the M-6 area is thermal drive, in this parti- cular case, steam drive. In-situ...

... Abstract Foamy oil flow, a phenomenon associated with primary production of heavy oil under solution gas drive, is a widely accepted explanation for the high recovery factors observed in some heavy oil reservoirs. A number of theoretical, experimental and field studies related to the subject...

... gas drive Reservoirs with solution-gas-drive are usually good candidates of waterflooding. Energy in such reservoirs is depleted quickly leading to increased gas/oil ratios. Primary recovery rates are low (between 10-30%) but these can be significantly increased using waterflooding. Fluid...

...; and fluid and formation (and rock) properties. Overall, of these the dominant reservoir drive mechanism(s) and its effect on pressure maintenance and sweep efficiency (effectiveness of pushing oil towards the producing wells) are often the chief criteria for implementing the chosen subsurface development...