... Abstract One of the significant issues in producing heavy oil is that the higher inherent in situ oil viscosities lead to poor displacement during a waterflooding operation. Polymer flooding has been shown to be beneficial to improve overall recoveries with a modest decrease in mobility ratio...

... quantitatively affect flow reversibility. We establish two types of reversibility. Reversibility of the first kind belongs to processes where the forward and reverse displacements are time symmetrical; such processes do not form shocks. Reversibility of the second kind refers to scenarios where key observables...

... in suboptimal recovery effectiveness. In recent years, there has been growing attention towards the synergistic advantages of oil displacement through the injection of fluids such as CO 2 , hydrocarbon gases, and chemical additives. This paper presents the design of a microscopic visualization experimental...

... of the remaining oil that has been unrecovered by simpler methods of oil recovery (e.g., water injection). Previous studies have shown that such CO 2 -enhanced oil recovery (CO 2 -EOR) effectively serves as a CO 2 sequestration method because a successful CO 2 -EOR typically results from efficient displacement...

... interfacial viscoelasticity displacement surfactant interface elasticity imbibition Introduction The injection of modified chemistry water in secondary and tertiary recovery processes has drawn attention in recent years. Decrease in salinity of injection water (LSW) in some crudes...

... geological subdiscipline technology conference heterogeneity nguyen displacement hydrocarbon Introduction Unconventional oil basins significantly contribute to US oil production, accounting for approximately 65.5% of total oil output in 2022 ( EIA, 2023 ). For these low-permeability reservoirs...

... carbonate rocks without affecting the water/oil interfacial tension; however, it had not been tested under HSHT conditions. The main objective of this research was to investigate the impact of 3-pentanone on convective oil displacement in oil-wet carbonate rocks under HSHT conditions. First, aqueous...

... in reducing IFT between oil and water. The IFT of C-APG was 10-fold lower than original APG surfactant, suggesting great potential in chemical flooding for oil displacement. Micromodel test showed that the produced heavy oil by injection of APG or C-APG solution was further enhanced after water flooding. C...

... temperature. CO 2 -NB was also compared with a mixture of CO 2 and brine with no NB in high-pressure high-temperature huff-n-puff experiments with live oil-saturated tight Kentucky sandstone cores using three different fracture-matrix configurations. Coreflooding results showed that the displacement of oil...

... Abstract Any aqueous solution viscosified by a polymer (or glycerol) should improve the recovery of a very viscous oil to some degree, but it has long been thought that the detailed rheology of the solution would not play a major role. However, recent heavy oil displacement experiments have...

... Abstract For very viscous oils (>500cp), a stable polymer flood is not economical due to low processing rates. In such cases, a partially stable (mobility ratio >1) polymer flood must be designed. Depending on the magnitude of viscosity ratio, these displacements will be influenced...

... Abstract Carbonate reservoirs from Pre-salt layer are responsible for a significant volume of Brazils total oil production. Recovery mechanisms applied are mostly water injection, aiming for pressure maintenance and oil recovery increase through macroscopic oil displacement, complemented by gas...

... uncertainty. fluid modeling enhanced recovery production control reservoir surveillance production monitoring chemical flooding methods miscible method gas injection method flow in porous media equation of state reservoir simulation pvt measurement fluid dynamics px diagram displacement...

... (Levitt et al. 2013), we demonstrated a surprisingly high oil recovery with low concentration (and viscosity) partially hydrolyzed polyacrylamide (HPAM) polymer solutions of only 3 cP displacing a 2000 cP oil. Additional experiments with more viscous as well as non-elastic viscosifying agents demonstrated...

... Summary Minimum Miscibility Pressure (MMP) is a key design parameter for gas injection projects. It is a physical parameter that is a measure of local displacement efficiency while subject to some constraints due to its definition. Also, MMP value is used to tune compositional models along...

... Abstract Upscaling the simulation of unstable displacement of heavy oil is challenging because accurately modeling the development and propagation of viscous instabilities within a simulation grid-block is next to impossible. Various models have been developed that are capable of history...

.... conformance improvement polymer enhanced recovery Fluid Dynamics flow in porous media thickened co 2 viscosity Berea core Brine experiment pressure drop sandstone water management Upstream Oil & Gas displacement co 2 monomer permeability injection thief zone pure co 2 conformance...

... by this technique in a consolidated sandstone core at residual oil and water conditions, after being submitted to a gas flooding displacement. This condition is obtained as far as the gas velocity is above a minimum threshold, and the concentration of the active chemical is above certain limit (138 ppm...

... Abstract This study investigates how compositional effects interact with the flow behavior during near miscible (and immiscible) CO 2 -oil displacements in heterogeneous systems. A series of numerical simulations modeling 1D slim-tube and 2D areal systems were performed using a fully...

... of the oil bank and its displacement by foam drives of varying qualities. Experiments include: (a) bulk phase behaviour and foam testing studies using n-hexadecane and a single internal olefin sulfonate surfactant which was found to lower the oil-water interfacial tension by at least two orders of magnitude...