... be carefully selected ( Sorbie 1991 ). Polymer retention may accumulate near-wellbore leading to continuous deteriorating of well injectivity that may jeopardize the success of the project. The retained polymer introduces both an additional unexpected resistance to flow and loss of the polymeric material...

... as an approximation of a Langmuir isotherm for small c . The equation for the polymer-capture rate is given by 1.4 ∂ s ∂ t = λ ( s ) c u . For the filtration coefficient λ we assume linear dependence on s , leading to a zero filtration coefficient at s = s...

... reservoirs to harness the DP migration for EOR applications. Reservoir Characterization Upstream Oil & Gas dead-end channel chemical gradient enhanced recovery nanosurfactant solution particle application different chemical gradient waterflooding polymer experiment micelle gradient...

... functional groups of polymers, crosslinkers and retardants is essential to control the gelation process considering kinetic, strength and stability of the gel. The objective of this work is to better understand chemistry mechanisms in gel formation to design an optimal gelation system for in-depth...

....% NaCl powder into deionized water. The prepared brine was filtered through a 0.45 μm cellulose nitrate filter before it was used in polymer preparation. The polymeric solutions were prepared by dispersion of the polymer powder into 1wt.% NaCl brine. Then the stock polymer solution was diluted...

... are of interest. In a well workover in 2013, two high-viscous polymer pills were bull-headed and squeezed into the reservoir. The well productivity was reduced with around 50% while the water-cut dropped and pointed to potentially 3 mmstb of extra oil recovery. A research study was initiated with the objectives...

... , Levitt et al. 2012 , Upamali et al. 2016 , Southwick et al. 2016 ). The understanding of the phase behaviour in Alkali Surfactant Polymer (ASP) significantly improved (e.g. Gosh and Johns 2016 , Khorsandi and Johns 2016 , Jin et al. 2016 ). The rheology of micro-emulsions was investigated by several...

... , 10 ]. In a polymer flooding process, a well treatment process (CC, WSO) or eventually any other process, the injection of several types of polymeric solutions can be envisioned. Polymers considered could have different chemical structure, may not have been dissolved in the same water and may...

... Abstract Polymer flooding has increasingly been considered for heavy oil recovery applications. This has been encouraged by positive results from field applications at e.g. Pelican Lake and Tamaredjo and lab experiments showing that highly efficient recovery can be obtained at mobility ratios...

... Abstract This paper evaluates three viscoelastic phenomena in high molecular weight polymers (24-28 M Daltons) used for EOR applications based on core flooding experiments. First, we evaluate the impact of semi-harsh conditions (salinity, hardness, and temperature). Second, we investigate...

... geology and structure, it is feasible to induce hydraulic fractures that can reach leaking faults located hundreds of meters away from the injection well. The initial viscosity of the chosen polymer (at the fluid state) is 30 cp. During the thermally driven polymerization, the viscosity rapidly increases...

... Abstract Current analyses indicate that 50% of oil produced in USA and the world will be through EOR technologies in the next 20-25 years, and heuristics suggest that polymer flooding should be applied in reservoirs with oil viscosities between 10 and 150 mPa.s. The key factor limiting...

... Abstract This study focuses on the investigation of the total pressure drop with regards to the shear, elongational and frictional forces experienced by the viscoelastic EOR polymers during the flow through porous media. The main analysis is performed to these forces occurring at low Reynolds...

... Abstract Alkaline-surfactant-polymer (ASP) flooding is a Chemical Enhanced Oil Recovery (CEOR) method whereby alkali, surfactant and polymer are injected as the same slug. It is one of the most promising world-wide focus of CEOR research and field trials, due to the unique synergy of the three...

.... The present work evaluates new foaming solutions that incorporate nanoparticles to investigate the mobility-control performance when such foams are used as hydraulic fracturing fluids. Of special interest in this work is the study of mobility reduction factor (MRF) of CO 2 foam, generated with polymer-based...

... placement of a polymer gel system in layered reservoirs is presented in this paper. The controlled release of crosslinkers for delayed gelation is modeled by long half-life of the gelants assuming a simple model of reaction kinetics. Results of the gel injection are compared with water and polymer floods...

... that was used for assessing the cleanup effectiveness is based on determination of the polymer content in the flowback of the fracturing fluid with a size exclusion chromatography (SEC). The technique provides the polymer concentration in the return fluid in a series of samples collected throughout the cleanup...

... Abstract Experiments on injection of composite EOR fluids, simultaneously or sequentially, have been validated by small scale simulation, with cell sizes in the millimeter-range. The injected fluids have been a combination of low-salinity brine, surfactant, and polymer. This presentation...

... Abstract The application of crosslinked gels has seen widespread use within the petroleum industry to divert fluid flow and remediate leakage at wells. The current study aimed at investigating the effectiveness of polymer-gel treatment in remediating a potential CO 2 leakage site...

... Abstract The polymer pilot test performed in the 8 TH sandstone reservoir in Austria shows incremental oil production. Soon after increasing oil cuts were detected, polymer was back-produced from the wells which were showing the oil production response. The polymer concentration increased...