2019
DOI: 10.18599/grs.2019.4.103-113
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Enhanced oil recovery from high-viscosity oil deposits by acid systems based on surfactants, coordining solvents and complex compounds

Abstract: Physicochemical aspects of enhanced oil recovery (EOR) from heavy high-viscosity deposits, developed in natural mode and combined with thermal methods, using systems based on surface-active substances (surfactants), coordinating solvents and complex compounds are considered, which chemically evolve in situ to acquire colloidal-chemical properties that are optimal for oil displacement. Thermobaric reservoir conditions, interactions with reservoir rock and fluids are the factors causing the chemical evolution … Show more

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Cited by 14 publications
(3 citation statements)
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“…Pore volume in [mm 3 ] and porosity in [%] before acid exposure after acid exposure 1404.15 mm 3 11.76% 1842.17 mm 3 17.34 % From the X-ray CT images of selected rock samples we establish that after acidizing with Emulsion A, porosity of the rock samples increases on average by 20% relative to the initial value, and the pore volume increases by 18%. This result suggests that Emulsion A performs significantly better compared with conventional emulsions used worldwide, with which the average increase in porosity is in the range between 10 to 15% [19,[48][49][50][51].…”
Section: Tablementioning
confidence: 99%
“…Pore volume in [mm 3 ] and porosity in [%] before acid exposure after acid exposure 1404.15 mm 3 11.76% 1842.17 mm 3 17.34 % From the X-ray CT images of selected rock samples we establish that after acidizing with Emulsion A, porosity of the rock samples increases on average by 20% relative to the initial value, and the pore volume increases by 18%. This result suggests that Emulsion A performs significantly better compared with conventional emulsions used worldwide, with which the average increase in porosity is in the range between 10 to 15% [19,[48][49][50][51].…”
Section: Tablementioning
confidence: 99%
“…По результатам исследований кислотных составов отмечено, что увеличение скорости закачки приводит к росту коэффициента проницаемости по нефти после кислотной обработки (рис. 5) [25][26][27][28][29][30][31][32].…”
Section: рис 2 результаты томографических исследований образца баклunclassified
“…Призабойная зона пласта (ПЗП) является важнейшим элементом гидродинамической системы «пласт -скважина», ее состояние во многом определяет текущие значения продуктивных характеристик [6,7]. Получение достоверной информации о состоянии призабойной зоны является одной из важнейших задач промыслового контроля за разработкой и эксплуатацией месторождений углеводородного сырья [4,5,8]. Одним из распространенных методов оценки гидродинамического состояния ПЗП является определение скин-фактора S [1,9] при обработке кривых восстановления давления (КВД), получаемых в ходе гидродинамических исследований (ГДИ) скважин.…”
unclassified