NON-STATIONARY HIGH VISCOUS OIL PRODUCTION FROM THE VERTICALLY FRACTURED CARBONATE RESERVES

2018 ◽  
Author(s):  
Irina Guskova
Keyword(s):  
Oil Production ◽  
Viscous Oil ◽  
Fractured Carbonate

EOR Techniques Tailored to Venezuelan Conventional and Unconventional Oils: Critical Review

2020 ◽  
Author(s):  
Fernancelys Rodriguez M.
Keyword(s):  
Oil Production ◽  
Mobility Control ◽  
Heavy Oils ◽  
The North ◽  
Viscous Oil ◽  
Fluid Systems ◽  
Producer Country ◽  
Chemical Eor ◽  
Gas Flooding ◽  
Compositional Gradients

Abstract Venezuela has been ranked as a potential oil producer country thanks to its huge reserves of conventional and unconventional oils. Conventional reservoirs with complex fluid systems, located in the North of Monagas state, where it is possible to observe thick fluid columns with significant compositional gradients (showing changes from gas condensate to non-mobile oil-Tar mat). In these types of reservoirs EOR methods such as miscible gas flooding have been successfully applied to compensate pressure decline and avoid asphaltene deposition issues. Production of unconventional oils, the largest highly-viscous oil reservoir of La Faja Petrolifera del Orinoco (La FPO), demands great challenges. Discovered in the 1930’s, the first rigorous evaluations of this reservoir started in the 1980s [1]; those huge deposits of highly viscous oils were considered technically and economically unattractive at that time. Due to production decline of conventional oil reservoirs, efforts are being done by the Venezuelan National Oil Company and collaborators to develop EOR projects to achieve increasing oil production in unconventional (heavy and extra-heavy) reservoirs, being the most promising options thermal and chemical EOR methods. Some authors agree that in the FPO, only 40–65% (depending on the site) of the oil-bearing formations is suitable for thermal EOR methods. Recent works have been showing the potential of chemical EOR for extra-heavy oils in La FPO [2, 3, 4, 5, 6, 7, 8, 9], mostly for mobility control and mobilization of residual oil. This work presents a literature review of the EOR projects in Venezuela for conventional and highly viscous oils, based on both lab and field experiences, and the perspectives for applications to increase Venezuelan oil production.

RESEARCH OF LOADS ON DRIVE OF ROD INSTALLATIONS IN LOW SPEED MODE AT HIGH-VISCOUS OIL PRODUCTION

2020 ◽  
Vol 18 (1) ◽  
pp. 120
Author(s):  
K.R. Urazakov ◽  
R.Z. Nurgaliev ◽  
G.I. Bikbulatova ◽  
S.L. Sabanov ◽  
Yu.A. Boltneva
Keyword(s):  
Oil Production ◽  
Low Speed ◽  
Viscous Oil ◽  
Speed Mode

scholarly journals SPECIFICS OF VISCOUS OIL PRODUCTION USING A DRAIN-HOLE WELL

2016 ◽  
pp. 114-119
Author(s):  
I. V. Chizhov
Keyword(s):  
Oil Recovery ◽  
Oil Production ◽  
High Viscosity ◽  
Viscous Oil ◽  
Drain Hole ◽  
High Viscosity Oil

The article is devoted to the problem of increasing the efficiency of high viscosity oil recovery from low permeable beds.

Field Realization of Adaptive Reservoir Simulation for Steam Injection Forecasting

2021 ◽  
Author(s):  
Stanislav Ursegov ◽  
Evgenii Taraskin ◽  
Armen Zakharian
Keyword(s):  
Oil Recovery ◽  
Oil Production ◽  
Steam Injection ◽  
Carbonate Reservoirs ◽  
Base Case ◽  
Simple Liquid ◽  
Limited Information ◽  
Viscous Oil ◽  
Production Wells ◽  
Liquid Displacement

Abstract Globally, steam injection for heavy and high-viscous oil recovery is increasing, including carbonate reservoirs. Lack of full understanding such reservoir heating and limited information about production and injection rates of individual wells require to forecast steam injection not only deterministic and simple liquid displacement characteristic modeling types, but also the data-driven one, which covers the adaptive modeling. The implementation and validation of the adaptive system is presented in this paper by one of the world's largest carbonate reservoirs with heavy and high-viscous oil of the Usinsk field. Steam injection forecasting in such reservoirs is complicated by the unstable well interactions and relatively low additional oil production. In the adaptive geological model, vertical dimensions of cells are similar to gross thicknesses of stratigraphic layers. Geological parameters of cells with drilled wells do not necessarily match actual parameters of those wells since the cells include information of neighboring wells. During the adaptive hydrodynamic modeling, a reservoir pressure is reproduced by cumulative production and injection allocation among the 3D grid cells. Steam injection forecasting is firstly based on the liquid displacement characteristics, which are later modified considering well interactions. To estimate actual oil production of steamflooding using the reservoir adaptive geological and hydrodynamic models, dimensionless interaction coefficients of injection and production wells were first calculated. Then, fuzzy logic functions were created to evaluate the base oil production of reacting wells. For most of those wells, actual oil production was 25 – 30 % higher than the base case. Oil production of steamflooding for the next three-year period was carried out by modeling two options of the reservoir further development - with and without steam injection. Generally, forecasted oil production of the option with steam injection was about 5 % higher. The forecasting effectiveness of cyclic steam stimulations of production wells was done using the cross-section method, when the test sample was divided into two groups - the best and the worst, for which the average forecasted oil rates after the stimulations were respectively higher or lower than the average actual oil rate after the stimulations for the entire sample. The difference between the average actual oil rates after the stimulations of the best and the worst groups was 32 %, i.e. this is in how much the actual oil production could have increased if only the best group of the sample had been treated.

Geomechanics of thermal viscous oil production in sandstones

2013 ◽  
Vol 103 ◽  
pp. 121-139 ◽  
Author(s):  
Ali Shafiei ◽  
Maurice B. Dusseault
Keyword(s):  
Oil Production ◽  
Viscous Oil

scholarly journals Integrating Geology and Engineering for Viscous Oil Production Improvement—JX Oilfield, Bohai Bay, China

2018 ◽  
Vol 08 (09) ◽  
pp. 859-873
Author(s):  
Zhicheng Yang ◽  
Yunpeng Li ◽  
Zongbin Liu ◽  
Gaige Wang ◽  
Qi Cheng
Keyword(s):  
Oil Production ◽  
Bohai Bay ◽  
Viscous Oil ◽  
Production Improvement

scholarly journals USE OF ELECTROTREATMENT METHOD FOR OIL RECOVERY ENHANCEMENT

2015 ◽  
pp. 67-73 ◽  
Author(s):  
O. V. Smirnov ◽  
A. E. Kozyaruk ◽  
K. V. Kuskov ◽  
A. L. Portnyagin ◽  
A. V. Saphonov
Keyword(s):  
Oil Recovery ◽  
Oil Production ◽  
Well Stimulation ◽  
Viscous Oil

The paper considers the issues of oil production enhancement through applying methods of well stimulation including the wells producing viscous oil, in particular various methods of electrotreatment.

Proposed Diagnostic and Treatment Workflows for Asphaltene Deposition Enhances Oil Production from a Naturally Fractured Carbonate Reservoir: A Case Study

2015 ◽  
Author(s):  
Carlos Perez Tellez ◽  
Mario Mosqueda Thompson ◽  
Obed Sanchez Ramirez ◽  
Umut Aybar ◽  
Jose Luis Camarillio Valtierra
Keyword(s):  
Oil Production ◽  
Carbonate Reservoir ◽  
Naturally Fractured ◽  
Asphaltene Deposition ◽  
Fractured Carbonate
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