... Abstract Chemical flooding methods hold particular attraction for recovering the "residual oil" left in the reservoir after waterflooding. This paper describes and compares the results for two promising methods, viz. micellar flooding and alkaline-surfactant-polymer (ASP) flooding processes...

..., a wide variety of surfactants were screened using Berea core, high pressure, moderate temperature and high salinity solutions. Polymer enhanced foams were created in various combinations. The design team had to tackle problems of adsorption versus optimum concentration, compatibility of reagents...

... saturations. The interfacial tension can be lowered by injecting a properly selected surfactant solution into the reservoir. Increasing the viscosity of the injection brine with polymer addition enhances the oil recovery by improving the sweep efficiency and displacing emulsified oil. In this work a micellar...

... of duration of Surfactant Alternating Gas (SAG) injection cycle, reservoir heterogeneity, and economic aspects of the process. It was established that favorable conditions for creation and propagation of foam for combating gravity override may exist in certain heterogeneous reservoirs, where paths of least...

... phase (oleic, emulsion. and aqueous), six-component (oil, water, surfactant, polymer, monovalent ion, and divalent ion) flow in a porous medium. The general scaling criteria were simplified for core floods, and verified by micellar floods in scaled models. Model and prototype were geometrically scaled...

... interface gelation upstream oil & gas droplet conformance improvement water production initial viscosity surfactant ofwater experiment polymer gel viscosity emulsion horizontal barrier enhanced recovery high density dilution low viscosity aquifer cbw technology inc MODIFIED POLYMER...

... recovery methods, three of which- micellar, surfactant and caustic flooding techniques - are discussed in thispaper, in the light of the authors' laboratory experiments. Under optimalconditions, a 5% pore volume slug of micellar solution can recover as much as90% of the residual oil left after a waterflood...

... often preclude satisfactory numerical simulation. This paper discusses the design of micellar flooding experiments, using scaling rules derived in this study. The derivation is based on three-phase flow (oleic, aqueous and emulsion phases), with six components (oil water, surfactant, polymer, monovalent...

... gradients. This experimental and theoretical investigation addresses the problem of bitumen mobilization under reservoir conditions, including the case of an underlying water layer. Two situations were considered: One, where the in-place bitumen is mobilized by a solventand surfactant, and the second...

... Abstract An experiment involving a steam drive process with aqueous surfactant (foaming agent) solution and nitrogen gas has been performed in a large-scale 90 cm physical simulator (51.8 cm ID by 91.4 cm long) at reservoir conditions to test the effectiveness of foam on the recovery...

... on a foam is less understood. This paper summarizes work that was carried out with the aim of gaining a better understanding of foam-oil interactions. A number of foam-forming surfactants were tested for their sensitivity to different crude oils using the following approaches: foaming capacity in a blender...

... Abstract Surfactant flooding of carbonate reservoirs is still a difficult proposition due to the harsh brine conditions and pore structure of carbonates. The first part of the work presented in this paper establishes the effect of the ionic composition, Then synthetic brines consisting of NaCl...

... Abstract This paper deals with a field application of foam forming surfactants injected into the Pembina Ostracod 'G' Pool to reduce the gas mobility and to improve sweep efficiency. The presentation describes the laboratory evaluation of a number of surfactants considered to be suitable...

... Abstract This paper presents an experimental and theoretical study of bitumen/heavy oil mobilization by solvent, gases and surfactants under cold conditions. Experimental runs employing a high permeability channel were conducted in a rectangular model which allowed packing of a bottom water...

... into. gilwood sand reservoir upstream oil & gas petroleum society light oil high salinity structural geology hardness foam salinity enhanced recovery application gilwood sand pool technical meeting gas injection method reservoir characterization beaverhill lake carbonate surfactant mobility...

... recovery thickness technical meeting bitumen oil sand mobility water zone thin bottom water zone complex reservoir bottom water zone surfactant upstream oil & gas cased hole macfarlane petroleum society slug size solvent slug size injectivity evaluate reservoir CASED HOLE LOGGING...

... all applications is the large disparity between the relatively high mobility of injected gases and the mobility of reservoir fluids, The development of gas fingers results in early gas breakthrough which necessitates expensive reinjection of produced gases. Application of foam forming surfactants...

... Abstract The potential benefits of using a surfactant with steam to recover viscous oil are now well recognized. This study describes a series of laboratory displacement runs carried out using Cold Lake and Athabasca oil sand cores, the steam was injected into a high permeability path emplaced...

..., and involved measurements of steady-state pressure drop across the one core at various combinations of gas and liquid flow rates and surfactant concentration. The total amount of oil displaced by foam was determined by material balance and extraction of the core, by the Dean-Stark method. Five different...

.../polymer system can recover incremental oil over waterflooding of approximately 30 % of original oil-in-place. With an addition of 0.1 % by weight of surfactant, up to 41 % of original oil-in-place can be recovered. No injectivity and fluid incompatibility problems were detected. The test results also...