... on oil displacement efficiency was investigated. Experimental results showed that WAG flooding presented great potential of enhanced oil recovery and good effect on delaying water and gas production. The severer the core heterogeneity, the smaller the fluctuation range and the less the fluctuation...

.... chemical flooding methods experiment saturation co2 injection pressure range oil recovery oil saturation upstream oil & gas permeability miscible phase natural fracture recovery potential carbon dioxide pore micro pore recovery factor core sample reservoir enhanced recovery...

... in the field to expand drainage area, severe water invasions still happened after years of development [1,2] . Cyclic CO 2 injection, also known as CO 2 huff-n-puff, was then conducted to enhance oil recovery (EOR) since 2010, and great profits has been brought with 109.5×10 4 t of oil productions until...

... Abstract Carbon dioxide (CO 2 ) injection has recently been applied in unconventional shale reservoirs to increase oil recovery. There are many methods by which CO 2 can be injected. One of the most common methods, especially in unconventional reservoirs, is cyclic CO 2 injection...

... to 0.13PV, the comprehensive water cut rate drop from 0.72% to 5.93%, and both oil and gas production increase accordingly. However, the gas use ratio dwindles as the volume exceeds 0.13PV. oil saturation chemical flooding methods coefficient crude oil oil recovery steam-assisted gravity...

... proceeding a CO 2 flooding process in the tight sandstone reservoir. permeability enhanced recovery production rate injection pressure co 2 chemical flooding methods production performance oil recovery concentration reservoir upstream oil & gas starch gel tight oil reservoir...

..., presenting a good effect on delaying water production. WAG injection showed a relatively plateau period of gas-oil ratio, indicating injected water delayed gas channeling. WAG flooding achieved the highest oil recovery, followed by continuous gas flooding and water flooding. This study provided an improved...

... Abstract Carbon dioxide (CO 2 ) has been proven to be an extremely successful enhanced oil recovery method to increase oil recovery from hydrocarbon reservoirs. It has also been proposed as a novel production method for unconventional shale reservoirs with nano pores as well. One of the main...

.... Therefore, the polymer gel has almost no blocking to CO 2 flow. polymer gel permeability zone chemical flooding methods oil recovery upstream oil & gas breakthrough pressure enhanced recovery co 2 fluid dynamics injection pressure conformance control permeability permeability core...

... Abstract As the only company which owns the right for coal mines and oil and gas production in China, Yanchang Petroleum Group has the unique advantages to implement integrated CO 2 capture and enhanced oil recovery (EOR) in Ordos Basin. This area is also one of the largest CO 2 emission...

... steam partial pressure, improve the steam quality and reduce heat loss, resulting in reduction of steam injection amount and improvement of development performance. The objective of the research is to investigate the mechanism of enhanced oil recovery (EOR) of flue gas assisted steam flooding which has...

... Abstract The practice of injecting CO 2 for oil production was initiated in the 1950's. Today, CO 2 flooding is an established technique to enhance oil recovery (EOR), and CO 2 capture and storage in deep geologic formations is being studied for mitigating carbon emissions. CO 2 -foam has...

... Abstract Injecting carbon dioxide (CO 2 ) into oil reservoirs has the potential to enhance oil recovery (EOR) and mitigate climate change by storing CO 2 underground. Despite successes in using CO 2 to enhance oil recovery, mobility control remains a major challenge facing CO 2 injection...

... Abstract As an efficient enhanced oil recovery (EOR) technique, carbon dioxide (CO 2 ) miscible flooding can greatly reduce the viscosity of oil and improve its mobility, and has great potential to achieve higher oil recovery. However, the disadvantage of CO 2 flooding, when compared...

... Abstract Shale formations in North America such as Bakken, Niobrara, and Eagle Ford have huge oil in place, 100–900 Billion barrels of oil in Bakken only. However, the predicted primary recovery is still below 10%. Therefore, seeking for techniques to enhance oil recovery in these complex...

... Abstract Carbon Dioxide (CO 2 ) flooding is one of the most globally used EOR processes to enhance the oil recovery. However, the low gas viscosity and density result in gas channeling and gravity override which lead to poor sweep efficiency. Foam application for mobility control...

... production. However, the primary recovery remains very low to narrow the profit margin heavily. Although CO 2 huff-n-puff process holds great potential to increase oil recovery and has a chance to sequester CO 2 to reduce environmental footprint, our current knowledge of the performance of this process...

... recovery is still low as an average of 7.5 %. Injecting carbon dioxide (CO 2 ) to enhance oil recovery in these poor-quality formations is still a debatable issue among investigators. In this study, three steps of research have been integrated to investigate the parameters which control the success of CO 2...

... Abstract Carbon dioxide (CO 2 ) flooding is a mature technology in oil industry that finds broad attention in oil production during tertiary oil recovery (EOR). After about five decades of developments, there have been many successful reports for CO 2 miscible flooding. However, operators...

... capital cost, and infrastructure corrosion. In this work, we present an alternative CO 2 flooding method which generates CO 2 inside the reservoir to increase oil recovery. The process involves the injection of a concentrated CO 2 producing solution of ammonium carbamate (AC). Chemical solvent CO 2...