... is much expensive than diesel, therefore, the diesel is slected as the optimal solvent during solvent soak process. Solvent soak mechanisms In order to analyze solvent soak mechanisms, a conceptual simulation model was built up using the average reservoir properties and well deployment...

... results for the last decade, it is acknowledged that substantial oil recovery beyond conventional waterflooding from sandstone is wettability alteration. However, the major contributor to wettability alteration is still uncertain. Therefore, this paper investigates this major mechanism and shows how...

... the initial 5 years of production. The reservoir mechanisms involved to increase the oil recovery during gas storage are partly similar to the reservoir mechanisms acting during tertiary gas injection: reservoir pressure maintenance, gravity drainage, horizontal sweeping of the oil, vaporization of some...

... ultimate oil recovery, the oil displacement mechanism using nanoparticles is not clearly understood yet. The focus of this study is to investigate the probable mechanism of nanoparticles dispersions to improve the recovery. In this study, silica nanoparticles dispersions were used in core flooding...

... to construct models of different permeability ( Fig.1 ). Displacement mechanism of alternative injection Change rules on fluid absorption profile. Experiment methodology The determination of molecular weight and concentration of polymer should abide by the principle of polymer injection parameters...

... heavy oil recovery surfactant complex reservoir injection mechanism Surfactant Flooding enhanced recovery carbonate reservoir sweep efficiency chemical flooding methods imbibition Upstream Oil & Gas matrix Oil Recovery stability fractured carbonate reservoir wettability alteration...

... in divalent cation concentration at the exchange surface was responsible for the LSE. These works both rely on MIE as the dominant low-salinity mechanism and do not take into account the relevance of total ionic strength. Kazemi Nia Korrani et al. (2014 ) built on work by Lager et al. (2011...

... A microscopic photoetching simulation model ( Zhu et al., 2014 ) was used for the study of microscopic mechanism of microbial flooding. The micro-displacement efficiency of microbes could be quantitatively studied through tests and image processing. The experiment showed that various remaining...

... processes all deemed unfeasible through screening studies. Consequently, the in-depth flow diversion mechanism was developed and applied, which utilizes a low molecular weight polymer to drive the growth of induced hydraulic fractures in the treated injection wells. A 3-injector pilot was executed involving...

... nitrogen assisted CSS for ultra-heavy oil. For these problems, this paper studies the feasibility and mechanism of nitrogen assisted CSS via laboratory experiments and simulation. Simulation results showed that it was feasible to inject nitrogen before CSS. Though nitrogen has little effect...

... and critical point drying. The aim of the study is to establish the potential mechanisms of formation damage during the iWAG progress and determine preventive, mitigative measures and provide guidelines for treatment if damage occurs. The main focus is on formation damage by fines migration, dirty injection...

... Abstract Low salinity waterflooding (LSF) provides an opportunity for improved oil recovery. However the complexity of the process makes both the fundamental understanding of the underlying mechanism(s) and the interpretation of laboratory experiments difficult. Therefore we use a model system...

... process to reveal its strengths, highlight knowledge gaps and suggest ways. The oil recovery mechanisms involved in CO 2 foam flood, the effect of gaseous and soluble CO 2 on the process, synergic effect of foaming agent and ultra-low IFT surfactants, logistic and operational concerns, etc. were...

... There are several mechanisms by which oil can destabilize a foam however not all oils degrade all foams. Foaming surfactants may be absorbed by oil, causing depletion of the surfactant from the aqueous phase and gas/liquid interface; or surfactants from the oil may be absorbed by the lamellae...

... different recovery mechanism. Some tiny fractures exist in carbonates. It is suspected that bacteria started to plug the fractures at the early stage of flooding. After plugging the fractures, the bacteria solution started to sweep the residual oil. Based on the test results, it can be seen...

... mechanisms and flooding scheme. For instance in Alkailne-Surfactnt-Polymer (ASP) process, residual oil saturation and end point saturation relative permeability, (which in turn depends on rock wettability), is a decisive factor in increasing oil recovery as ASP increases water wetness thereby reducing...

... of the reservoir rock is important to gain a better understanding of recovery mechanisms, and for the design and implementation of improved or enhanced recovery processes. While the importance of the mineralogy, wettability, pore scale structure and distribution of residual oil is widely acknowledged, little...

... process in fractured reservoirs, and also relatively low minimum miscibility pressure (MMP) of CO 2 , therefore, miscible CO 2 injection with Gas Oil Gravity Drainage (GOGD) mechanism can be considered as an efficient method in most carbonate reservoirs. In this paper, different production strategies...

... effect in the low permeability reservoirs, which can reduce the injection pressure and increase injection rate, thereby enhancing oil recovery. Common mechanisms that how the surfactants enhance oil recovery are discussed in the paper. On the basis of assumptions, a seepage model of surfactant flooding...

... being applied in the field. On a macroscopic level, the effect can be parameterized as effective wettability modification to a more water-wet state but on a microscopic level, the effect is still not very well understood. Most researchers agree that in sandstone rock, the mechanism is related to clay...