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Keywords: mechanism
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Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200341-MS
... Abstract Despite promising natural gas huff ‘n’ puff (HnP) field-pilot results, the dominant oil-recovery mechanisms during this process are poorly understood. We conduct systematic natural-gas (C 1 and a mixture of C 1 /C 2 with the molar ratio of 70/30) HnP experiments on an ultratight core...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200347-MS
... surfactant injection wettability oil recovery factor directional drilling upstream oil & gas polymer experiment surfactant fracture fluid dynamics mechanism yate injection oil recovery drilling operation carbonate reservoir concentration recovery saturation cationic surfactant...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200329-MS
... Abstract In our previous paper (SPE-190281-MS), we presented results from a suite of multiscale experiments to understand interactions occurring across crude oil/brine/carbonate rock interfaces with different brine compositions. A new atomic to molecular scale mechanism was proposed based...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200380-MS
... Abstract Injection of modified salinity brines modified salinity brines (MSB), i.e. brine with seawater-like salinity (SWS) and low salinity water (LSW) in oil-wet carbonate rocks is relevant to improved oil recovery operations. Many reports in the literature relate the underlying mechanisms...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200361-MS
... Abstract Several laboratory experiments demonstrated that different water compositions cause rocks to change from oil- to water-wet state. Although it is a consensus that wettability alteration is the main recovery mechanism, modeling the underlying mechanism is still a major challenge. Our...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200345-MS
... of gas huff n' puff indicate the main recovery mechanisms are re-pressurization and viscosity reduction characteristic of multicontact miscibility. And for reservoirs below the bubble-point, another recovery mechanism is the increase of heavy components' flux. However, either increasing the soak period...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200357-MS
... during low salinity Enhanced Oil Recovery (EOR). Crude oils and a model system (asphaltenes solubilized in toluene) have been studied. Observations were facilitated when using the model system, this allowed to have a better insight into the underlying mechanism of micro-droplet formation...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200444-MS
... is present in the porous media as a cementation, the following experiment is going to illustrate that. Abstract In recent years, many researchers reported that water flooding recovery factor increased by injecting low salinity (LS) water into sandstone reservoirs, but the mechanism of improved...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200451-MS
... Abstract Despite the plethora amount of research have been conducted on the Low Salinity Water Injection (LSWI) and the pertinent mechanisms, this Enhanced Oil Recovery (EOR) method still seems not to be well understood. Although the rock/fluid interactions are used to be highlighted...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200446-MS
... is based on the biomedical background. It consists in using a poly-N-isopropylacrylamide (pNIPAm) based nanogel, known for its thermo-sensitive nature, to ensure the in-situ delivery of tracer molecules. This effect is explored as a mechanism to both load and release the tracers for a SWCTT. PNIPAm...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190161-MS
... Several studies have focused on the contribution of different CO 2 trapping mechanisms after CO 2 injection in a saline aquifer ( Benson et al., 2005 ; Han et al., 2010 ; MacMinn et al., 2011 ; Al-Khdheeawi et al., 2017 ), and several studies have focused on different aspects of CO 2...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190277-MS
... 0 D i j 0 ρ k ( 0.99589 + 0.096016 ρ k r − 0.22035 ρ k r 2 + 0.032874 ρ k r 3 Different studies in the literature reported different mechanisms to explain the ability of the injected CO 2 to improve oil recovery in unconventional reservoirs...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190281-MS
... a series of experiments and theoretical modeling to determine the mechanisms that govern the ‘ SmartWater Effect ' , whereby reducing the ionic strength (concentration) of the injection fluids (compared to high ionic strength formation water), also known as SmartWater flooding, has been found to improve...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190320-MS
... the capacity of pumps for the field EOR processes. chemical flooding methods constant rate Simulation displacement rate porous media enhanced recovery displacement mechanism time-dependent displacement rate injection Upstream Oil & Gas time-dependent rate miscible displacement diffusion...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190201-MS
... results. To study the mechanisms of oil recovery and understand the uniqueness of these shale reservoirs, a series of studies were performed utilizing Eagle Ford (EF) and Canadian Bakken shale rocks and fluids. In this study customized chemical formulations for improving production from the EF...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190212-MS
... Abstract Thermal and solvent-based EOR methods are not applicable in many of thin post-CHOPS heavy oil reservoirs in Western Canada. Alkaline-surfactant flooding has been suggested as an alternative to develop these reservoirs. The main mechanism behind these processes has been attributed...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190214-MS
... has not been fully explored. This work was an attempt to conduct a systematic experimental study to improve our understanding of wettability of tight oil reservoirs and the mechanisms of its alteration on oil recovery improvement. Contact angles of individual rock-forming minerals and reservoir rock...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190215-MS
... enhanced recovery low salinity water flooding RezaeiDoust ls water waterflooding mechanism sandstone quartz kaolinite Oil Recovery acetate release quartz illite kaolinite wettability alteration water flooding Wettability alteration of parts of the rock surface from oil-wet to water-wet...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190283-MS
... the oil recovery by 3-17% on the basis of water flooding. Furthermore, micro flow tests were conducted in a visual micro-model to study its flow behaviors in porous media and EOR mechanisms. Through the micro-model, the displacement behaviors and mechanisms including emulsification, dragging/squeezing...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190234-MS
... in the tight formations of conventional reservoirs. Extending this approach to unconventional formations has been extensively investigated over the last decade because CO 2 has unique properties which make it the first option of EOR methods to be tried. However, the applications and mechanisms for CO 2 -EOR...

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