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Oil production from unconventional tight Bakken reservoirs in North America has been booming since the early 2000s because of the widespread application of horizontal well drilling and multi-stage hydraulic fracturing technologies. Tight oil recovery is made difficult by the extremely low permeability and porosity of the oil-hosting rocks. Two key characteristics in tight oil production are the steep...
During a water-alternating-gas (WAG) flooding process for heavy oil reservoirs, the adverse mobility ratio leads to a considerable amount of injection gas fingering through the oil zone. To improve the recovery efficiency of the WAG process for Saskatchewan (Canada) heavy oil reservoirs, a laboratory feasibility study was conducted to evaluate an improved WAG process that augments the injection water...
Asphaltene content plays an important role in determining the high viscosity of heavy oil. This paper presents an experimental and theoretical study of the specific effects of asphaltene content on the heavy oil viscosity at different temperatures. In the experiment, a deasphalted heavy oil is obtained by using a standard ASTM method to precipitate asphaltenes from a crude heavy oil. Then eleven reconstituted...
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