... Abstract CO 2 flooding is one of the most promising EOR methods. Due to the complicated compositional change during the displacement process, the effect of CO 2 injection on phase behavior of oil and gas system is still not clear so far. It can great limits the forecast of development effect...

... Abstract The cushion gas is indispensable to maintain the reservoir pressure, prevent the water intrusion and ensure the stability of underground gas storage (UGS). Considering the good thermodynamic properties, economic benefit and carbon storage, CO 2 is the ideal option for the cushion gas...

... Abstract In the current study, a novel methodology is introduced based on classical conservation model equations of mass, momentum and heat transfer in porous media sediments. Set of model equations have been used in discrete form to investigate liquefied high pressure CO 2 transformation...

... Abstract Problems like small sweeping volume, short stimulating period and poor producing performance challenge the effectiveness of single horizontal well CO 2 huff ‘n’ puff in the fault-block reservoirs with edge water. The effect of CO 2 volume on multiple horizontal wells CO 2 huff ‘n...

... Abstract The matrix permeability of the tight sandstone reservoir is very low, which causes difficulty to inject water, the CO 2 flooding is applied widely to these reservoirs for the better oil displacement and low injection pressure, but natural fractures develop as well as artificial...

... Abstract Asphaltene deposition is one aspect of the serious causes decreasing the production capacity, and a common phenomenon during CO 2 flooding in ultra-low permeability reservoirs. Prior to asphaltene deposition, the asphaltene first precipitates from the crude oil. It is urgent to find...

... Abstract With the demand for conformance control in CO 2 flooding fields, the traditional HPAM-Cr(III) polymer gel has been applied to reduce excess CO 2 production. However, the field application results are mixed. In order to understand the HPAM-Cr(III) polymer gel plugging performance...

... 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...

..., especially CO 2 , which could expand oil volume and reduce the flow resistance of heavy oil to a certain extent. Besides, the cumulative volume of the produced gas was smaller than the injected gas, and in the produced gas the proportion of CO 2 was less than the injected proportion. Furthermore...

... Noticeable progress in understanding the high efficiency of "foamy oil" in solution gas drive in heavy oil reservoirs has been made in recent years. However, "foamy oil" during CO 2 flooding was still a special and novel phenomenon when CO 2 flood asphaltic oil. The basic mechanism...

... 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...

... plays is inevitable. Although most of the previous studies in this area recommended that CO 2 would be the best EOR-technique to improve oil recovery in these formations, pilot tests showed that natural gases performance clearly exceeds CO 2 performance in the field scale. In this paper, two different...

... Abstract Carbon dioxide is commonly injected during secondary or tertiary recovery to enhanced oil recovery. While CO 2 can also cause some precipitation damage. Usually scale ions (Ca 2+ , Mg 2+ ) in water react with CO 2 to form solid precipitation that can plug the pores. In this report...

... Abstract Storage CO 2 in shale formation is considered as a promising option to reduce CO 2 emissions and enhance shale gas recovery. Many simple analytical and semi-analytical techniques have been proposed to support screening analysis and performance assessment for potential carbon...

... 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...

... miscible floods. A reservoir model was developed for the area of interest and was history-matched with the primary production data from the field. The model was then used to illustrate the CO 2 miscible flood potential by quantifying the incremental recovery over the primary production scenario...

... Abstract A novel method to remove nitrogen dioxide (NO 2 ) from the flue gas of coal-fired power plants with CO 2 capture has been advanced for commercial implementation. The technology leverages the equipment and chemistry in an existing (sulfur dioxide) SO 2 polishing scrubber upstream...

... 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 A new method of coalbed methane (CBM) recovery is proposed wherein hot carbon dioxide at or near supercritical condition is injected into a CBM reservoir to take advantage of enhanced desorption of methane at elevated temperatures and the preferential adsorption of CO 2 on coal...