scholarly journals Effective EOR methods in high-viscosity oil fields: cyclical GEL-polymer flooding and ASP flooding

2021 ◽  
Vol 3 (3) ◽  
pp. 61-74
Author(s):  
F. E. Safarov ◽  
S. Yu. Lobanova ◽  
B. Ye. Yelubaev ◽  
N. E. Talamanov ◽  
Sun Zhijian ◽  
...  
Keyword(s):  
Oil Recovery ◽  
High Viscosity ◽  
Polymer Flooding ◽  
Oil Field ◽  
Oil Fields ◽  
Tracer Studies ◽  
Asp Flooding ◽  
Reservoir Conditions ◽  
High Viscosity Oil ◽  
Pilot Tests

The presented work discusses increasing oil recovery factor using physicochemical EOR methods. This article presents the field pilot tests results related to cyclical gel polymer flooding technology as applied under the conditions productive reservoirs rich in high-viscosity oils (viscosity in reservoir conditions above 300 mPa s) of the Buzachi North oil field, extending the boundaries of application of these methods. The work used the methods of hydrodynamic modeling, mathematical analysis; the necessary parameters of fractures and super reservoirs for calculating the working volumes of the injected compositions were estimated using tracer studies.

Cyclical Gel-Polymer Flooding Technology is an Effective Method of Enhanced Oil Recovery in High-Viscosity Oil Fields

2020 ◽  
Author(s):  
Svetlana Yur’evna Lobanova ◽  
Berdibek Ulanovich Yelubaev ◽  
Nikolay Evgen’evich Talamanov ◽  
Zhijian Sun ◽  
Chunxi Wang ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
High Viscosity ◽  
Polymer Flooding ◽  
Oil Fields ◽  
High Viscosity Oil

scholarly journals EXPERIMENTAL SUPPORT OF FIELD TRIAL ON THE POLYMER FLOODING TECHNOLOGY SUBSTANTIATION IN THE OIL FIELD OF WESTERN KAZAKHSTAN

2020 ◽  
Vol 17 (35) ◽  
pp. 663-677
Author(s):  
Gulnaz MOLDABAYEVA ◽  
Raikhan SULEIMENOVA ◽  
Akmaral KARIMOVA ◽  
Nurken AKHMETOV ◽  
Lyailya MARDANOVA
Keyword(s):  
Oil Recovery ◽  
High Viscosity ◽  
Polymer Flooding ◽  
Oil Field ◽  
Dynamic Heterogeneity ◽  
Field Development ◽  
Western Kazakhstan ◽  
Technological Efficiency ◽  
Water Cut ◽  
High Viscosity Oil

One of the chemical methods of stimulating the reservoir to increase the efficiency of the oil field development process is polymer flooding. This article conducted a feasibility study of the effectiveness of the application of polymer flooding technology in one field in Western Kazakhstan. This field is characterized by high viscosity of reservoir oil, water cut, and dynamic heterogeneity of the reservoir. World experience in the application of polymer flooding in analogous fields shows high technological efficiency. Presented results of the analysis of the experience of applying technology in analogous fields, physicochemical studies of polymers, filtration studies on bulk models, hydrodynamic modeling of polymer flooding and the expected cost-effectiveness of introducing the technology, as applied to the conditions of the Karazhanbas oil field with high viscosity of reservoir oil. The analysis based on the experience of applying polymer flooding in high-viscosity oil fields, laboratory studies and estimated calculations of the expected production in the sector geological and hydrodynamic model shows a decrease in water cut, an increase in oil production, and an increase in current and final oil recovery.

Cyclical Gel-Polymer Flooding Technology is an Effective Method of Enhanced Oil Recovery in High-Viscosity Oil Fields (Russian)

2020 ◽  
Author(s):  
Svetlana Yur’evna Lobanova ◽  
Berdibek Ulanovich Yelubaev ◽  
Nikolay Evgen’evich Talamanov ◽  
Zhijian Sun ◽  
Chunxi Wang ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
High Viscosity ◽  
Polymer Flooding ◽  
Oil Fields ◽  
High Viscosity Oil

Analysis of the polymer flooding efficiency in one of the high-viscosity oil fields based on mathematical modeling

2021 ◽  
Author(s):  
M.G. Persova ◽  
Yu.G. Soloveichik ◽  
A.S. Ovchinnikova ◽  
D.S. Kiselev ◽  
I.I. Patrushev
Keyword(s):  
Mathematical Modeling ◽  
High Viscosity ◽  
Polymer Flooding ◽  
Oil Fields ◽  
High Viscosity Oil

Visco-Elastic Property Studies on Polymer Flooding Systems with High Concentrations

2012 ◽  
Vol 550-553 ◽  
pp. 834-837
Author(s):  
Ji Gang Wang ◽  
Quan Qing Du ◽  
Peng Wu ◽  
Shao Li Hu ◽  
Pan Niu
Keyword(s):  
Elastic Property ◽  
Oil Recovery ◽  
Elastic Characteristic ◽  
Polymer Flooding ◽  
Oil Field ◽  
High Concentration ◽  
Improved Oil Recovery ◽  
High Molecular Weight Polymer ◽  
Molecular Weight Polymer ◽  
Asp Flooding

Keywords: Visco-elastic property; polymer flooding; oil recovery Abstract. Polymer flooding and ASP flooding has improved oil recovery a lot in Daqing oil field. In ASP flooding, the existence of alkali decreases the visco-elastic characteristic of polymer, which decreases the oil recovery of polymer flooding. The aim of this paper was to study the visco-elastic characteristic, shear resistance in high concentration and high molecular weight polymer flooding, and analyzed the suitable parameter of it .They can provide the theory of polymer flooding development and application research.

scholarly journals Application of an Oil-Displacing Composition for Increasing Flow Rate of Low Producing High-Viscosity Oil Wells of the Usinskoye Oil Field

2016 ◽  
Vol 18 (2) ◽  
pp. 133
Author(s):  
L.K. Altunina ◽  
I.V. Kuvshinov ◽  
V.A. Kuvshinov ◽  
V.S. Ovsyannikova ◽  
D.I. Chuykina ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Oil Production ◽  
High Viscosity ◽  
Oil Field ◽  
Thermal Methods ◽  
Cold Stimulation ◽  
Well Production ◽  
Well Stimulation ◽  
High Viscosity Oil ◽  
Stimulation Of

The results of a pilot application of a chemical composition for enhanced oil recovery developed at the IPC SB RAS are presented. The EOR-composition was tested in 2014 at the Permian-Carboniferous heavy oil deposit at the Usinskoye oil field. It is very effective for an increase in oil production rate and decrease in water cuttings of well production. In terms of the additionally produced oil, the resulting effect is up to 800 tons per well and its duration is up to 6 months. The application of technologies of low-productivity-well stimulation using the oil-displacing IKhNPRO system with controlled viscosity and alkalinity is thought to be promising. This composition is proposed for the cold’ stimulation of high-viscosity oil production as an alternative to thermal methods.

scholarly journals Laboratory Results of the Influence of Carbon Dioxide on the Development of the Permo-Carboniferous Reservoir of the Usinskoe Deposit

2021 ◽  
Vol 21 (1) ◽  
pp. 28-35
Author(s):  
Stanislav A. Stanislav A. ◽  
◽  
Oleg A. Morozyuk ◽  
Konstantin S. Kosterin ◽  
Semyon P. Podoinitsyn ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Oil Recovery ◽  
Co2 Concentration ◽  
High Viscosity ◽  
Co2 Injection ◽  
Oil Displacement ◽  
Displacement Mode ◽  
Use Of Technology ◽  
Reservoir Conditions ◽  
High Viscosity Oil

As an option for enhancing oil recovery of a high-viscosity Permo-Carboniferous reservoir associated with the Usinskoye field, the use of technology based on technogenic carbon dioxide as an injection agent is considered. In the world practice, several fields are known as close in their parameters to the parameters of the Permo-Carboniferous reservoir, and in which CO2 injection was accepted as successful. Based on this, CO2 injection can potentially be applicable in the conditions of a Permo-Carboniferous reservoir. At present, as a result of the various development technologies implementation, reservoir zones are distinguished, characterized by different thermobaric properties. Depending on reservoir conditions, when displacing oil with gases, various modes of oil displacement can be realized. This article describes the results of studies carried out to study the effect of the concentration of carbon dioxide on the properties of high-viscosity oil in the Permo-Carboniferous Reservoir of the Usinskoye field, as well as the results of filtration experiments on slim models performed to assess the oil displacement regime under various temperature and pressure conditions of the Permo-Carboniferous Reservoir. The study of the influence of CO2 concentration on oil properties was carried out using the standard PVT research technique. The displacement mode was assessed using the slim-tube technique. Based on the performed experiments, it was established that an increase in the concentration of CO2 in high-viscosity oil led to a noticeable change in its properties; for the conditions of a Permo-Carboniferous Reservoir, the most probable mode of oil displacement by carbon dioxide was established. Difficulties associated with the preparation of the CO2-heavy oil system were described separately. Based on a literature review, it was shown that the rate of mixing of oil with carbon dioxide depended on certain conditions.

scholarly journals Hydrodynamic modeling of field development using enhanced oil recovery methods

2021 ◽  
Vol 317 (2) ◽  
pp. 14-22
Author(s):  
G.Zh. Moldabayeva ◽  
◽  
A.Kh. Agzamov ◽  
R.T. Suleimenova ◽  
D.K. Elefteriadi ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Seismic Data ◽  
Water Injection ◽  
Steam Injection ◽  
High Viscosity ◽  
Oil Fields ◽  
Borehole Data ◽  
Field Development ◽  
High Viscosity Oil ◽  
Cyclic Injection

This article discusses a digital geological model, the transfer of borehole data to the geological grid, and the modeling of the technology of alternating steam and water injection. Alternating injection involves the cyclic injection of steam and water into an injection well in high-viscosity oil fields. The essence of this technology is that during the steam injection for 2-4 months, the formation warms up, leading to a decrease in viscosity and an increase in oil mobility. Then comes the period of water injection, during which the production of already warmed oil continues and the formation pressure is maintained. For digital geological modeling, the following data were collected, processed and prepared: a list of wells that open the object of modeling, coordinates of wellheads, well altitudinal data, inclinometry of well trajectories, GМS data on wells, analysis of wells drilled with core sampling, and digitized seismic data (structural surfaces on the roof of stratigraphic horizons, parameter maps, contact surfaces, faults, structural maps on the roof of target horizons with faults, isochron maps, velocity maps).

Analysis of solutions of the Muskat — Leverett non-isothermal model for different types of oils

2020 ◽  
pp. 26-37
Author(s):  
O. B. Bocharov ◽  
I. G. Telegin
Keyword(s):  
Oil Recovery ◽  
High Viscosity ◽  
Oil Field ◽  
Hot Water ◽  
Oil Viscosity ◽  
Isothermal Model ◽  
Total Heat Loss ◽  
Low Viscosity ◽  
Different Types ◽  
High Viscosity Oil

In this article, numerical methods are used to analyze the features of solutions to the non-isothermal Muskat — Leverett two-phase filtration model. The structure of solutions to thermal waterflooding problems for low-viscosity and high viscosity types of oil is considered. Typical solutions for different types of functional parameters of the model are shown. The simulations show that hot water displacement of high-viscosity oil is an effective method of increasing oil recovery. In particular, if in the case of thermal flooding the reservoir with low-viscosity oil, recovery increases by only a few percent, then for a field with high viscosity oil, thermal flooding increases oil recovery by tens of percent. It is shown that in order to increase the efficiency of the thermal flooding it is necessary to pump hot water with the minimum possible capillary parameter. High total filtration rate reduces total heat loss through the roof and sole of the formation. Numerical experiments have shown that for an adequate simulation of thermal flooding, in addition to taking into account changes in oil viscosity, it is necessary to take into account the action of capillary forces and the variation of relative phase permeability during the operation of the oil field.

scholarly journals Polymers for EOR Application in High Temperature and High Viscosity Oils: Rock–Fluid Behavior

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5944
Author(s):  
Rubén H. Castro ◽  
Sebastián Llanos ◽  
Jenny Rodríguez ◽  
Henderson I. Quintero ◽  
Eduardo Manrique
Keyword(s):  
High Temperature ◽  
Oil Recovery ◽  
High Viscosity ◽  
Oil Field ◽  
Heavy Oils ◽  
Displacement Efficiency ◽  
Reservoir Conditions ◽  
Oil Displacement Efficiency ◽  
Sulfonated Polyacrylamide ◽  
Total Dissolved Solid

Viscosity losses and high degradation factors have a drastic impact over hydrolyzed polyacrylamides (HPAM) currently injected, impacting the oil recovery negatively. Previous studies have demonstrated that biopolymers are promising candidates in EOR applications due to high thermochemical stability in harsh environments. However, the dynamic behavior of a biopolymer as scleroglucan through sandstone under specific conditions for a heavy oil field with low salinity and high temperature has not yet been reported. This work presents the rock–fluid evaluation of the scleroglucan (SG at 935 mgL−1) and sulfonated polyacrylamide (ATBS at 2500 mgL−1) to enhance oil recovery in high-temperature for heavy oils (212 °F and total dissolved solid of 3800 mgL−1) in synthetic (0.5 Darcy) and representative rock samples (from 2 to 5 Darcy) for a study case of a Colombian heavy oilfield. Dynamic evaluation at reservoir conditions presents a scenario with stable injectivity after 53.6 PV with a minimal pressure differential (less than 20 psi), inaccessible porous volume (IPV) of 18%, dynamic adsorption of 49 µg/g, and resistance and residual resistance factors of 6.17 and 2.84, respectively. In addition, higher oil displacement efficiency (up to 10%) was obtained with lower concentration (2.7 times) compared to a sulfonated polyacrylamide polymer.

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