...) and low critical micelle concentration (CMC). In addition to the essential physical-chemical properties, improvement in fluid recovery and emulsion compatibility were also targeted. The surfactants were optimized by tailoring the hydrophilic head through controlled introduction of ethylene oxide...

... proppant surfaces (silica sand and ceramic proppant) in order to study how wettability will affect the fluids recovery and their interaction with the solid surfaces. Nanotechnology was used to deposit hydrophobic/oleophobic moieties onto the proppant surfaces, and several surface modifiers were tested...

... tests, are one of the enabling technologies that can be deployed to investigate reservoir flow performance, reservoir connectivity, residual oil saturation and reservoir properties that control displacement processes, particularly in improved oil recovery (IOR) and enhanced oil recovery (EOR) operations...

... was concerned with the development of flowback aids based on micro-/nano-emulsion technology for enhanced gas and oil recovery after fracturing application. The goal was to formulate microemulsion concentrates which form nanoemulsions when diluted into fracturing fluids and provide strong surface...

... regions and may become a vital tool to investigate the potential for enhanced oil recovery and assess the effect of EOR measures. Outside the oil industry, the new tracers should also be useful for NAPL identification and evaluation of NAPL remediation processes. injector experiment oil saturation...

... productivity and improve the overall oil recovery from the flooding process. Accordingly, the goal of the gel is to maximize gel penetration and permeability reduction in high permeable zone while minimizing gel penetration and permeability reduction in less permeable zones of the reservoir. A successful...

... Abstract Recovery of injected fluids from aqueous hydraulic fracturing applications can be enhanced by the use of flowback aids. These additives are typically surfactants or co-solvents that reduce capillary pressure and water blocks. A range of different types of flowback aids, which contain...

... water-wet as it adsorbs and so drops the contact angle to 0°. The phase multiplier, c1, for both of these curves was set to 1 so that the ultimate contact angle induced from the surfactant occurred at complete adsorption, or Γ = 1. Abstract Load recovery from fracturing treatments in tight-gas...

... Abstract In a layered 2-D heterogeneous sandpack with 19:1 permeability contrast that was preferentially oil-wet, the recovery by waterflood was only 49.1% of original oil-in-place (OOIP) due to injected water flowing through high-permeability zone leaving low-permeability zone unswept...

... production chemistry upstream oil & gas brine inhibitor detection recovery inhibitor concentration scale inhibitor filtration assay cartridge sulphonated polymer calibration curve polymeric scale inhibitor spe 141575 separation concentration ppm sulphonated copolymer graham...

... Abstract When a typical oil reservoir reaches its economic limit after primary and secondary recovery (water flooding), the world average says that more than two thirds of the original oil is left in place 1 . The challenge is to develop Enhanced Oil Recovery (EOR) methods that ensure...

... Abstract This paper presents a new zeta potential altering system that is based on an inner salt developed to enhance the water flowback recovery on borate and slick-water frac jobs. The system also aids in the control of fines. The mechanism of this system is to modify the zeta potential...

... Abstract Fluid recovery after fracturing treatments in tight gas reservoirs is often critical in obtaining maximum production rates. Fluid recovery aids in washing broken fracturing fluid out of the propped fracture and restores the relative permeability to gas in the invaded matrix...

... into a laboratory sand packed column. A laboratory simulated comparison study of an ethoxylated alcohol and microemulsion was used to determine their water recovery properties from gas wells. Field data collected from Bradford and Speechley sandstone formations confirms experimental sand packed column and core...

... recovery of costly synthetic fluids could improve the overall economics of drilling. This paper summarizes research efforts into development of a technique that uses liquefied hydrocarbon gases as solvents to extract oil from cuttings. The laboratory data presented shows that a wide variety of fluids can...

... Abstract Chemical enhanced oil recovery technology can be used to remove oily contaminants from soil. Laboratory studies demonstrated that a variety of alkali plus surfactant combinations can be used with polymer to reduce waterflood residual oil saturation. In these studies, the oil saturation...

... (organometallic-crosslinked fluids) exhibit poor production in comparison to wells fractured using multiple fluids. Improved fracturing fluid recovery and improved well performance were observed in wells fractured with multiple fluids. The improved well performance is attributed to less conductivity impairment...

... ABSTRACT The performance of sodium hydroxide, sodium orthosilicate, and sodium metasilicate solutions in oil recovery was evaluated in displacement tests using core samples and fluids from a Western Canada sandstone oil reservoir. Each core plug was first waterflooded with the formation...

.... incremental recovery flow in porous media thickness permeability zone vertical conformance treatment simulator enhanced recovery modification vertical permeability crossflow high permeability zone fluid dynamics permeability recovery permeability ratio upstream oil & gas reservoir grid...

... ABSTRACT The tertiary recovery of oil by chemical flooding is an admittedly complex process involving both micro and macroemulsions. The work reported here suggests from fundamental considerations of theory, operation and economics that in situ emulsification of the immobile residual oil...