scholarly journals Selection of waterflooding systems for enhanced oil recovery by solving two-phase filtration problem

2019 ◽  
Vol 1158 ◽  
pp. 042003
Author(s):  
S P Rodionov ◽  
V P Kosyakov ◽  
E N Musakaev
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Two Phase ◽  
Filtration Problem ◽  
Selection Of

Modeling to support physicochemical enhancement techniques

2021 ◽  
pp. 79-90
Author(s):  
Т. A. Pospelova
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Oil And Gas ◽  
Chemical Modeling ◽  
Comparative Structure ◽  
Water Cut ◽  
Physical And Chemical ◽  
Oil And Gas Companies ◽  
The Impact ◽  
Selection Of

The article discusses ways to increase the oil recovery factor in already developed fields, special attention is paid to the methods of enhanced oil recovery. The comparative structure of oil production in Russia in the medium term is given. The experience of oil and gas companies in the application of enhanced oil recovery in the fields is analyzed and the dynamics of the growth in the use of various enhanced oil recovery in Russia is estimated. With an increase in the number of operations in the fields, the requirements for the selection of candidates inevitably increase, therefore, the work focuses on hydrodynamic modeling of physical and chemical modeling, highlights the features and disadvantages of existing simulators. The main dependences for adequate modeling during polymer flooding are given. The calculation with different concentration of polymer solution is presented, which significantly affects the water cut and further reduction of operating costs for the preparation of the produced fluid. The possibility of creating a specialized hydrodynamic simulator for low-volume chemical enhanced oil recovery is considered, since mainly simulators are applicable for chemical waterflooding and the impact is on the formation as a whole.

scholarly journals Surfactant-Polymer Interactions in a Combined Enhanced Oil Recovery Flooding

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6520
Author(s):  
Pablo Druetta ◽  
Francesco Picchioni
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Combined Processes ◽  
Sweep Efficiency ◽  
Two Phase ◽  
Chemical Agents ◽  
Chemical Eor ◽  
Eor Processes ◽  
Adsorption Rates ◽  
Polymer Interaction

The traditional Enhanced Oil Recovery (EOR) processes allow improving the performance of mature oilfields after waterflooding projects. Chemical EOR processes modify different physical properties of the fluids and/or the rock in order to mobilize the oil that remains trapped. Furthermore, combined processes have been proposed to improve the performance, using the properties and synergy of the chemical agents. This paper presents a novel simulator developed for a combined surfactant/polymer flooding in EOR processes. It studies the flow of a two-phase, five-component system (aqueous and organic phases with water, petroleum, surfactant, polymer and salt) in porous media. Polymer and surfactant together affect each other’s interfacial and rheological properties as well as the adsorption rates. This is known in the industry as Surfactant-Polymer Interaction (SPI). The simulations showed that optimum results occur when both chemical agents are injected overlapped, with the polymer in the first place. This procedure decreases the surfactant’s adsorption rates, rendering higher recovery factors. The presence of the salt as fifth component slightly modifies the adsorption rates of both polymer and surfactant, but its influence on the phase behavior allows increasing the surfactant’s sweep efficiency.

Selection of Effective Solvents – Universal Modification of Presently Available Enhanced Oil Recovery Methods and Oil Production Stimulation Processes

2020 ◽  
Author(s):  
Aleksandr Tarasovich Litvin ◽  
Aleksey Alekseyevich Terentiyev ◽  
Denis Anatolevich Gornov ◽  
Vladimir Nikolaevich Kozhin ◽  
Konstantin Vasiliyevich Pchela ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Oil Production ◽  
Selection Of ◽  
Recovery Methods

scholarly journals The effectiveness of computed tomography for the experimental assessment of surfactant-polymer flooding

2020 ◽  
Vol 75 ◽  
pp. 5
Author(s):  
Fabián Andrés Tapias Hernández ◽  
Rosângela Barros Zanoni Lopes Moreno
Keyword(s):  
Computed Tomography ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Material Balance ◽  
Experimental Methodology ◽  
Petroleum Engineering ◽  
Two Phase ◽  
Experimental Assessment ◽  
Tertiary Oil Recovery ◽  
Comparative Results

The Surfactant-Polymer (SP) process is a type of Chemical Enhanced Oil Recovery (CEOR) method. They are still a challenge for the petroleum oil industry mainly because of the difficulty in designing and forecasting the process behavior on the field scale. Therefore, understanding of the phenomena associated with a CEOR process is of vital importance. For these reasons, this work discusses the benefits of Computed Tomography (CT) uses for the experimental assessment of a SP process. The research includes a literature review that allows identifying the main CT usages for petroleum engineering and a discussion concerning the effectiveness of mathematic expressions proposed for the tomography images treatment of two-phase flow displacement. The conducted experimental methodology can be reproduced to assess the benefits of any chemical Enhanced Oil Recovery (EOR) process with CT. Thus, this paper assesses the conventional waterflooding (WF) and SP flooding as secondary and tertiary oil recovery methods. The developed study allowed us to evaluate through CT images the porosity and the saturation profiles along the rock sample. Also, CT processed data enabled checking the volumetric material balance and determine the oil Recovery Factor (RF). The doubled checked SP data showed an RF increase of 17 and 10 percentage points for secondary and tertiary chemical injection schemes respect to conventional waterflooding. Finally, comparative results of the water cut (Wcut) evidenced the mobility ratio improvement and reduction on the remaining oil saturation.

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