Singular Controls For Increasing Oil Recovery Of Natural Oil Deposits

2020 ◽  
Author(s):  
Atlas Akhmetzyanov ◽  
Elizaveta Krupina ◽  
Alexey Samokhin
Keyword(s):  
Oil Recovery ◽  
Singular Controls ◽  
Natural Oil ◽  
Oil Deposits

scholarly journals Enhanced oil recovery from high-viscosity oil deposits by acid systems based on surfactants, coordining solvents and complex compounds

Georesursy ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 103-113 ◽  
Author(s):  
Lyubov K. Altunina ◽  
Vladimir A. Kuvshinov ◽  
Lyubov A. Stasyeva ◽  
Ivan V. Kuvshinov
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
High Viscosity ◽  
Complex Compounds ◽  
Natural Mode ◽  
Inorganic Acid ◽  
Acid Oil ◽  
Oil Displacement ◽  
Oil Deposits ◽  
High Viscosity Oil

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 of the systems. To enhance oil recovery and intensify the development of high-viscosity deposits, acid oil-displacing systems of prolonged action based on surfactants, inorganic acid adduct and polyatomic alcohol have been created. As a result of experimental studies of acid-base equilibrium in the systems with donor-acceptor interactions – polybasic inorganic acid and polyol, the influence of electrolytes, non-electrolytes and surfactants, the optimal compositions of the systems were selected, as well as concentration ranges of the components in the acid systems. When the initially acid system interacts with the carbonate reservoir to release CO2, the oil viscosity decreases 1.2-2.7 times, the pH of the system rises and this system evolves chemically turning into an alkaline oil-displacing system. As a result it provides effective oil displacement and prolonged reservoir stimulation. The system is compatible with saline reservoir waters, has a low freezing point (minus 20 ÷ minus 60 oC), low interfacial tension at the oil boundary and is applicable in a wide temperature range, from 10 to 200 oC. In 2014-2018 field tests of EOR technologies were successfully carried out to intensify oil production in the test areas of the Permian-Carboniferous deposit of high-viscosity oil in the Usinsk oil field, developed in natural mode and combined with thermal-steam stimulation, using the acid oil-displacing system based on surfactants, coordinating solvents and complex compounds. The pilot tests proved high efficiency of EOR technologies, as far as the oil production rate significantly increased, water cut decreased to intensify the development. The EOR technologies are environmentally safe and technologically effective. Commercial use of the EOR is promising for high-viscosity oil deposits.

scholarly journals Oil-Displacing Surfactant Composition with Controlled Viscosity for Enhanced Oil Recovery from Heavy Oil Deposits

Georesursy ◽  
2016 ◽  
Vol 18 (4) ◽  
pp. 281-288 ◽  
Author(s):  
L.K. Altunina ◽  
◽  
V.A. Kuvshinov ◽  
L.A. Staseva ◽  
I.V. Kuvshinov ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Heavy Oil ◽  
Oil Deposits ◽  
Surfactant Composition

Enhancing oil recovery of high-viscosity and heavy oil deposits using polymer flooding

2018 ◽  
Vol 5 ◽  
pp. 60-63
Author(s):  
V.P. Telkov ◽  
◽  
A.K. Karimov ◽  
M.G. Mostajeran ◽  
S.V. Kim ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Heavy Oil ◽  
High Viscosity ◽  
Polymer Flooding ◽  
Oil Deposits

Laboratory Study on Carbon Dioxide and Surfactant Assisted with Steam Flooding in Qi 40

2013 ◽  
Vol 807-809 ◽  
pp. 2562-2567
Author(s):  
Tao Ping Chen ◽  
Yu Guo Wang
Keyword(s):  
Carbon Dioxide ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Recovery Rate ◽  
Oil Sand ◽  
Oil Displacement ◽  
High Temperature And Pressure ◽  
Natural Oil ◽  
Block Formation ◽  
Temperature And Pressure

The natural oil sand from Qi 40 block formation is made into 5 teams total 10 high temperature and pressure long double tube reservoir nonhomogeneity models .The experimental oil is simulation oil which is made by mixing the wellhead crude oil with diesel. On the base that steam soaking and steamdriving recovery reach to the current oilfield average level, we do 1 group double tube steam +CO2 .The natural oil sand from Qi 40 block formation is made into 5 teams total 10 high temperature and pressure long double tube reservoir nonhomogeneity models .The experimental oil is simulation oil which is made by mixing the wellhead crude oil with diesel. On the base that steam soaking and steamdriving recovery reach to the current oilfield average level, we do 1 group double tube steam +CO2 composite displacement experiment and 4 group double tube surfactant adjustable profile + steam +CO2 composite displacement experiment. And record after steamflooding steam drive with carbon dioxide and surfactant improvement value. The results show that in the steam composite flooding, enhanced oil recovery rate increases as the number of composite plug PV growing. Carbon dioxide and steam are injecter by 1:1 alternately and composite plug is 0.3PV, in which enhanced oil recovery rate can reach 19% and cost of oil displacement agent is 38.77 Yuan/ton of oil. Carbon dioxide and II thermostability discharge aiding agent are injecter by 1:1 alternately and thebest composite slug is 0.3PV, in which enhanced oil recovery rate can reach 23.7% and cost of oil displacement agent is 289.66 Yuan/ton of oil. When the plug PV number is same(0.3), surfactant + CO2 composite plug can improve more 4.7% than steam +CO2. Hence, thermostability discharge aiding agent have some effects on improving recovery.

scholarly journals Geomicrobiology

2008 ◽  
Vol 29 (1) ◽  
pp. 32
Author(s):  
Lewis R Brown
Keyword(s):  
Energy Source ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Microbial Enhanced Oil Recovery ◽  
Microbiological Techniques ◽  
Major Energy Source ◽  
Oil Deposits ◽  
Increasing Demand

The ever increasing demand for oil, coupled with the reduction in reserves, is increasing emphasis on finding new oil deposits and recovering more oil from known reserves since half to two thirds of all of the oil discovered to date is still in the ground and not recoverable by present technology. There are, however, microbiological techniques that could be of value in extending the time before alternatives to oil as the major energy source are required. Two will be discussed here ? geomicrobiological prospecting and microbial enhanced oil recovery (MEOR).

scholarly journals Multifunctional Composition Based on Surfactants and a Complex of Buffer Systems to Enhance Oil Recovery of High-Viscosity Oil Deposits

2021 ◽  
pp. 30-37
Author(s):  
Liubov K. Altunina ◽  
Vladimir A. Kuvshinov ◽  
Ivan V. Kuvshinov ◽  
Liubov A. Stasyeva
Keyword(s):  
Oil Recovery ◽  
High Viscosity ◽  
Buffer System ◽  
Reaction Products ◽  
Wide Ph Range ◽  
Low Interfacial Tension ◽  
Oil Deposits ◽  
Ph Range ◽  
Enhance Oil Recovery ◽  
High Viscosity Oil

To enhance oil recovery of high-viscosity oil deposits in the temperature range of 20-210 °C, a multifunctional composition with adjustable viscosity and high oil-displacing ability has been developed based on surfactants, aluminum and ammonium salts, an adduct of inorganic acid, carbamide and polyol. High buffer capacity of the composition in a wide pH range, 2.5-10 units pH, is provided by a complex of buffer systems: in the acidic range of pH, 2.5-4.0, the system “polyolboric acid and its salt”, in the alkaline range of pH – anammonia-borate buffer system. The composition has a low interfacial tension, a prolonged reaction with carbonate rocks, prevents the precipitation of insoluble reaction products, and increases the permeability of reservoirs. The composition is both oil-displacing and flow-diverting, it provides an enhance in the oil recovery factor, both due to the increase in the displacement factor and the the reservoir sweep by waterflooding or thermal steam stimulation

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