Wormlike micelles formed by amidosulfobetaine surfactants present advantage in increasing viscosity, salt-tolerance, thermal-stability and shear-resistance. In the past few years, much attention has been paid on rheology behaviours of that normally bear C18 or shorter tails. Properties oil displacement performances wormlike counterparts bearing long carbon chain have not well documented. this p...

Despite the development of alternative energy sources, oil and gas still remain predominant sources in most countries world. Due to gradual hydrocarbon reserve depletion existing downward trend production level, there is a need search for methods technical approaches level off falling rates. Chemically enhanced recovery (EOR) by surfactant solution injections are one possible addressing this is...

This paper was selected for presentation by an SPE Program Committee following review of information contained in a proposal submitted by the author(s).

this study examines the effects of change in the concentrations of monovalent and divalent ions in the polymer-contained surfactant solution on the macroscopic behavior of viscous-modified surfactant waterflooding in heavy oil reservoirs. salts that are used in this set of floods were sodium chloride, magnesium chloride, and calcium chloride. the results indicate that four different ranges of s...

Carbon dioxide has been used commercially to recover oil from reservoir by enhanced oil recovery technologies for over 40 years. Currently, the CO2 flood is the second most applied enhanced oil recovery (EOR) processes in the world behind steam flood. Water alternating gas (WAG) injection has been a popular method to control mobility and improve volumetric sweep efficiency for CO2 flooding. The...