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.

Indoor Study of Viscosity Reducer for Thickened Oil of Huancai

2012 ◽  
Vol 268-270 ◽  
pp. 547-550
Author(s):  
Qing Wang Liu ◽  
Xin Wang ◽  
Zhen Zhong Fan ◽  
Jiao Wang ◽  
Rui Gao ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Oil Recovery ◽  
Heavy Oil ◽  
High Viscosity ◽  
Oil Field ◽  
Viscosity Reduction ◽  
Oil Viscosity ◽  
Low Viscosity ◽  
Viscosity Reducer ◽  
Oil Water

Liaohe oil field block 58 for Huancai, the efficiency of production of thickened oil is low, and the efficiency of displacement is worse, likely to cause other issues. Researching and developing an type of Heavy Oil Viscosity Reducer for exploiting. The high viscosity of W/O emulsion changed into low viscosity O/W emulsion to facilitate recovery, enhanced oil recovery. Through the experiment determine the viscosity properties of Heavy Oil Viscosity Reducer. The oil/water interfacial tension is lower than 0.0031mN•m-1, salt-resisting is good. The efficiency of viscosity reduction is higher than 90%, and also good at 180°C.

scholarly journals Influence of Oil Viscosity on Alkaline Flooding for Enhanced Heavy Oil Recovery

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Yong Du ◽  
Guicai Zhang ◽  
Jijiang Ge ◽  
Guanghui Li ◽  
Anzhou Feng
Keyword(s):  
Oil Recovery ◽  
Heavy Oil ◽  
High Viscosity ◽  
Low Permeability ◽  
Oil Viscosity ◽  
Low Viscosity ◽  
Medium Permeability ◽  
Tertiary Oil Recovery ◽  
Different Temperatures ◽  
Water Drops

Oil viscosity was studied as an important factor for alkaline flooding based on the mechanism of “water drops” flow. Alkaline flooding for two oil samples with different viscosities but similar acid numbers was compared. Besides, series flooding tests for the same oil sample were conducted at different temperatures and permeabilities. The results of flooding tests indicated that a high tertiary oil recovery could be achieved only in the low-permeability (approximately 500 mD) sandpacks for the low-viscosity heavy oil (Zhuangxi, 390 mPa·s); however, the high-viscosity heavy oil (Chenzhuang, 3450 mPa·s) performed well in both the low- and medium-permeability (approximately 1000 mD) sandpacks. In addition, the results of flooding tests for the same oil at different temperatures also indicated that the oil viscosity put a similar effect on alkaline flooding. Therefore, oil with a high-viscosity is favorable for alkaline flooding. The microscopic flooding test indicated that the water drops produced during alkaline flooding for oils with different viscosities differed significantly in their sizes, which might influence the flow behaviors and therefore the sweep efficiencies of alkaline fluids. This study provides an evidence for the feasibility of the development of high-viscosity heavy oil using alkaline flooding.

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.

Heavy-Oil Recovery by Combined Hot Water and Alkali/Cosolvent/Polymer Flooding

SPE Journal ◽  
2016 ◽  
Vol 21 (01) ◽  
pp. 74-86 ◽  
Author(s):  
M.. Tagavifar ◽  
R.. Fortenberry ◽  
E.. de Rouffignac ◽  
K.. Sepehrnoori ◽  
G. A. Pope
Keyword(s):  
Oil Recovery ◽  
Heavy Oil ◽  
Oil Field ◽  
Hot Water ◽  
Mobility Control ◽  
Heavy Oil Recovery ◽  
Oil Viscosity ◽  
Polymer Flood ◽  
Low Interfacial Tension ◽  
Combined Strategy

Summary A hybrid process is developed and optimized for heavy-oil recovery that combines moderate reservoir heating and chemical enhanced oil recovery in the form of alkali/cosolvent/polymer flood. The process is simulated by use of a model derived from existing laboratory and pilot data of a 5,000-cp heavy-oil field. It is found that hot waterflooding is efficient in heating the reservoir only when high early injectivity is achievable. This may not be the case if incipient fluid injectivity is low and/or long, continuous, horizontal shale baffles are present. To remedy the former, an electrical-preheating period is devised, whereas switching to a horizontal flood could overcome the latter. Once the reservoir temperature is raised sufficiently, a moderately unstable alkali/cosolvent/polymer flood is capable of mobilizing and displacing oil. A best combined strategy for efficient reservoir heating, high oil recovery, and cost effectiveness is found to involve reducing the oil viscosity to values of approximately 300–500 cp and combining a degree of mobility control and low interfacial tension as recovery mechanisms.

scholarly journals Numerical 3D simulation of enhanced oil recovery methods for high-viscosity oil field

2021 ◽  
Vol 1019 ◽  
pp. 012050
Author(s):  
M G Persova ◽  
Y G Soloveichik ◽  
A S Ovchinnikova ◽  
I I Patrushev ◽  
A V Nasybullin ◽  
...  
Keyword(s):  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
High Viscosity ◽  
Oil Field ◽  
3D Simulation ◽  
High Viscosity Oil ◽  
Recovery Methods

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.

Modeling High-Viscosity Oil/Water Cocurrent Flows in Horizontal and Vertical Pipes

SPE Journal ◽  
2012 ◽  
Vol 17 (01) ◽  
pp. 243-250 ◽  
Author(s):  
H.Q.. Q. Zhang ◽  
D.H.. H. Vuong ◽  
C.. Sarica
Keyword(s):  
Water Flow ◽  
Oil Recovery ◽  
Heavy Oil ◽  
Flow Behavior ◽  
Model Performance ◽  
High Viscosity ◽  
Low Viscosity ◽  
Oil Water ◽  
Mixing Length Theory ◽  
High Viscosity Oil

Summary Water is produced along with heavy oil either during the primary production or during enhanced oil recovery. Therefore, cocurrent oil/water flow is a common occurrence in heavy-oil production and transportation. Production-system design is strongly dependent on accurate predictions of the oil-/water-flow behavior. The predictions of previous mechanistic models for pressure gradient and water holdup are tested with the data acquired, and significant discrepancies are identified, especially for horizontal flow (Vuong 2009). The model performance is largely dependent on the predictions of phase inversion, distribution, and interaction. On the basis of the new understandings from experimental observations, the Zhang and Sarica (2006) unified model is modified by adding a new closure relationship for water-wetted-wall fraction in stratified flow and a new interfacial shear model based on mixing-length theory. The new model is compared with both high-viscosity and low-viscosity oil-/water-flow experimental results, and significant improvements are observed.

REDUCING THE VISCOSITY OF OIL CONTAINING COLLOIDAL PARTICLES ON THE BASIS OF THE FRACTAL THEORY ON THE EXAMPLE OF PRESSURE OSCILLATIONS BY ULTRASONIC IMPACT

2021 ◽  
Vol 2 (1) ◽  
pp. 61-66
Author(s):  
Sobir Nasilloyevich Urinov ◽  
◽  
Parizoda Muzaffar kizi Sabirova ◽  
Svetlana Olegovna Dobychina
Keyword(s):  
Oil Recovery ◽  
Colloidal Particles ◽  
Fractal Theory ◽  
Pressure Fluctuations ◽  
High Viscosity ◽  
Oil Viscosity ◽  
Pressure Oscillations ◽  
Ultrasonic Action ◽  
Lower Viscosity ◽  
High Viscosity Oil

The content of the work consists in obtaining from high-viscosity oil, oil with a lower viscosity, in order to increase oil recovery. Proceeding from the fact that today the most pressing issue is the growth of oil production, amethod for increasing oil recovery was recommended basedon the fractal theory, pressure fluctuations of the studied fluid. This analysis shows that a decrease in oil viscosity can be obtained only at small values of the amplitude of oscillations for a definite long time.Key words:High-viscosity oil, colloidal particles, fractal aggregate (FA), ultrasonic action, fractal theory, shear rate, pressure fluctuation

scholarly journals Combined Well Treatment with Various Chemical Compositions and Thermal Methods

2019 ◽  
pp. 473-482
Author(s):  
Ivan V. Kuvshinov ◽  
Liubov K. Altunina ◽  
Vladimir A. Kuvshinov
Keyword(s):  
Oil Recovery ◽  
Water Injection ◽  
Field Tests ◽  
High Viscosity ◽  
Komi Republic ◽  
Oil Field ◽  
Hot Water ◽  
Chemical Compositions ◽  
Thermal Methods ◽  
Combined Application

This paper presents the field tests results of the combined application of chemical compositions with various functional purposes, gel-forming, intensifying and oil-displacing, in combination with thermal methods of oil recovery. A complex application, in combination with other technologies, of an acid oil-displacing and intensifying composition with prolonged action based on surfactants, inorganic acid adducts and polyatomic alcohol is considered. Field tests were carried out on the Permian- Carboniferous reservoir of the Usinsk high-viscosity oil field, Komi Republic, Russia. The results of two treatments are presented: a hot water injection horizontal well and a production cyclic steam stimulated (CSS) well. It is concluded that it is necessary to combine various methods of enhanced oil recovery to achieve higher efficiency

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.

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