... Abstract While enhanced oil recovery using carbon dioxide (CO 2 -EOR) is a mature technology and known to concurrently store large volumes of CO 2 , it is not currently viewed by industry as a CO 2 storage process. Application of CO 2 -EOR for CO 2 storage to reduce anthropogenic CO 2...

... Abstract Carbon dioxide miscible flooding is a proven EOR method. It faces two significant challenges: gravity override and early CO 2 break through. Many researchers have investigated different methods to control CO 2 mobility and improve its sweep efficiency. This paper, for the first time...

... Abstract In spite of CO 2 mobility reduction during CO 2 and surfactant solution co-injection, CO 2 -foam flooding in heavy oil reservoirs has relatively poor sweep efficiency due to the high viscosity the oil. Therefore, reducing the oil viscosity is necessary to improve CO 2 -foam sweep...

... Abstract CO 2 foam for enhanced oil recovery applications has been traditionally used in order to address mobility control problems occur during CO 2 flooding. However, the supercritical CO 2 foam generated by surfactant has a few shortcomings such as loss of surfactant to the formation due...

... curves. However, there are no well recognized methods to perform the calculation, especially for carbon dioxide flooding due to the strong interaction among CO 2 , brine and oil phases. Diffusion coefficient and solubility of CO 2 in crude oil and brine were measured. Furthermore, all parameters...

... to determine MMP. However these tests are both expensive and time consuming. Our study aims to find a quick and accurate mathematical methodology to determine gas–oil MMP. This study was conducted using 30 wells data sets which have experimental CO 2 -MMP values. These data sets were corresponding to gas/oil...

... Abstract The application of the Carbon Dioxide Enhanced Oil Recovery (CO 2 -EOR) to an offshore oilfield in Vietnam has been investigated through an international joint study between Japan and Vietnam since 2007. In order to reduce and mitigate uncertainties and risks for future field scale...

... Abstract Although more emphasis is placed on the interaction between CO 2 and oil during a CO 2 injection process, the interaction of CO 2 with the reservoir brine, too, could be significant in terms of its impact. This study presents a modeling approach to evaluate the possible effects...

... in field applications, including early gas breakthrough, corrosion, CO2 availability and high costs. immiscible co 2 oil reservoir field application immiscible flooding enhanced recovery oilfield heavy oil recovery crude oil Upstream Oil & Gas concentration co 2 heavy oil reservoir...

... Steam Stimulation heavy oil Oil Recovery experiment reduction reservoir enhanced recovery flue gas viscosity co 2 Oil Viscosity injection horizontal well reservoir conditions Introduction There are abundant heavy oil resource in Bohai Oilfield, and most of the heavy oil reservoirs...

... & Gas Efficiency experiment waterflooding concentration increment variation coefficient crude oil enhanced recovery injection pressure co 2 carbon dioxide generation technology viscosity gas generating efficiency Injection Rate carbon dioxide generation in-situ carbon dioxide generation...

... Abstract In mature fields, optimization of CO 2 flood and tertiary oil recovery demand accurate and consistent formation evaluation in producing wells. The complex well history—including near-wellbore (NWB) stimulation and recompletion for flood injection—often poses challenges...

... Abstract CO 2 is injected into mature reservoirs for both sequestration and EOR. The effect of CO 2 flooding on asphaltene stability has been extensively addressed in literature. In contrast, asphaltene / water interaction has not received much attention in literature. The objective...

... such reservoirs. CO 2 EOR has provided not only an excellent opportunity to unlock more oil production, but also a chance to sequestrate more CO 2 to reduce environmental footprint. However, profitability of CO 2 EOR processes could rely heavily on market conditions. While CO 2 EOR reserves and CO 2 storage...

... Abstract Foam assisted CO 2 enhanced oil recovery has attracted increasing attention of oil companies (operators and service companies) and research institutions mainly due to the potentially high benefit of foam on CO 2 -EOR. Miscible and immiscible CO 2 flooding projects are respectively...

... Laboratory Investigation salinity Upstream Oil & Gas Brine experiment waterflooding Engineering gravity segregation supercritical co 2 University crude oil Western Australia incremental oil recovery enhanced recovery EOR Oil Recovery donnybrook sandstone co 2 investigation Injection...

... Abstract In CO 2 projects for enhanced oil recovery (EOR) a critical factor is possible early CO 2 breakthrough and consequently poor sweep efficiency. Injection of foam can block and divert CO 2 which may improve sweep efficiency. Large changes in physical properties of CO 2...

... Abstract We have performed a miscible CO 2 flood study using fractured and unfractured carbonate cores and 31° API west Texas oil to evaluate oil recovery under three main injection modes: SWAG, WAG, and CGI. For each injection mode, three cases were considered: unfractured, one horizontal...

... oils. A surfactant formulation that gave the most stable foam in the presence of oil was used in the core-floods. Oil recovery with CO 2 and with N 2 foams from natural sandstone cores was studied with the aid of X-ray Computed Tomography, varying the injection rates, foam quality and surfactant...

... processes performance. However there are very few numerical and experimental studies conducted on the effect of wettability on the efficiency of WAG processes. This work examines how to optimize WAG processes for carbon dioxide (CO 2 ) floods above the minimum miscibility pressure (MMP) in both oil-wet...