Steam Stimulation Pilot Project in the Orinoco Belt, Zuata Area, Venezuela

Burkill, G.C.C.; Rondon, L.

doi:10.2118/21090-ms

Cited by 2 publications

(1 citation statement)

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“…Among the technologies to extract heavy-oil reservoirs, the thermal recovery technology is the main development method. Mainly based on steam flooding, cyclic steam stimulation (CSS), and steam-assisted gravity drainage (SAGD), the thermal recovery technology uses technological measures to increase the temperature of the oil layer, reduce the viscosity of heavy oil, and make the heavy oil easily flow to recover the heavy oil (Burkill and Rondon, 1990;Wang et al, 2018a;Chen et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Cyclic Steam Stimulation Assisted by Flue Gas Under Shallow Heavy-Oil Reservoir Conditions: Optimization of the Steam-Flue Gas Ratio

Wang

Han

et al. 2020

Front. Energy Res.

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Normally, the recovery effect of a heavy-oil reservoir gradually deteriorates after multiple rounds of cyclic steam stimulation (CSS). However, the injection of flue gas can effectively increase the utilization degree of steam heat energy, which improves the recovery effect. In this paper, an experimental method for CSS using an energy storage container was established. Based on this method, a one-dimensional core physical simulation experiment for CSS under different flue gas ratios was performed. During the experiment, the changes in temperature field, oil production rate, increase in backpressure, and oil recovery factors were tested. In addition, differences in these data under different injection steam-flue gas ratios were compared. The results show that the flue gas provides a channel of fluids in porous media for steam, which is conducive to the heat transfer of steam to the deeper part of the sandpack. The sandpack has a higher temperature in each cycle than the CSS. The core temperature of each round of flue-gas-assisted CSS is higher than that of the CSS. The final oil recovery factors of flue-gas-assisted CSS using different steam-flue gas ratios are 22.2, 26.7, 30.8, 24.4, and 21.6%, while that of CSS is only 17.2%. According to the experiment, it is concluded that the best steam-flue gas ratio to optimize the flue-gas-assisted CSS is 1:10. With the combined effect of three factors (the temperature field of the sandpack, energizing effect of the flue gas, and degree of oil during recovery), the flue-gas-assisted CSS using the steam-flue gas ratio of 1:10 maximizes the steam heat transfer, increases the energy of return discharge, replenishes formation energy, and improves the oil recovery factor. Through the experiment, the research results provide theoretical guidance for improving the effectiveness of the CSS of heavy-oil reservoirs.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on the Cyclic Steam Stimulation Assisted by Flue Gas Under Shallow Heavy-Oil Reservoir Conditions: Optimization of the Steam-Flue Gas Ratio

Wang

Han

et al. 2020

Front. Energy Res.

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Evaluation of Different Strategies for Selective Steam Injection in Stratified Heavy-Oil Reservoirs

Perdomo

Cubillos

Navarro

et al. 2014

Day 1 Wed, September 24, 2014

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Steam injection is one of most successful techniques for improving oil recovery in heavy oil fields. However some reservoirs have characteristics that are not adequate for the implementation of this technique due to reservoir heterogeneity, where steam driving is present in most favorable areas as a result giving a channeling which does not allow the existence of a uniform vertical steam distribution, leaving unheated areas, decreasing the process efficiency and obtaining unexpected oil recovery factors.Therefore in this paper different strategies were evaluated using a numerical reservoir simulator to determine most suitable option with the greatest chance of technical success for the implementation of selective steam injection. For the development of this research initially a study of selective steam injection process was performed in stratified reservoirs, once it was made this, the strategies for selective injection were raised: Steam injection at maximum and minimum rates for different layers, the product of each layer permeability by thickness and reservoir stimulation preceded by selective injection. Finally, the strategies selected were implemented in conceptual simulation models built in this case for a stratified homogeneous and heterogeneous reservoir developed with the properties of a Colombian heavy oil field using a comercial software.The final results were analyzed based on the behavior of the oil recovery factor and the injection profile, these confirmed the efficiency of the technique, allowing to heat the formations by appropriate injection rate and for this reason an increase in the amount of recovered oil.After obtaining the simulation results is set the better or best possibilities for implementing selective injection, it determines the range of application where selective steam injection could be run efficiently obtained from the ratio of the product of the permeability by the thickness and it is determined that treatment is best for the reservoir with cyclic steam simulation before selective steam injection.

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Steam Stimulation Pilot Project in the Orinoco Belt, Zuata Area, Venezuela

Cited by 2 publications

References 0 publications

Experimental Study on the Cyclic Steam Stimulation Assisted by Flue Gas Under Shallow Heavy-Oil Reservoir Conditions: Optimization of the Steam-Flue Gas Ratio

Experimental Study on the Cyclic Steam Stimulation Assisted by Flue Gas Under Shallow Heavy-Oil Reservoir Conditions: Optimization of the Steam-Flue Gas Ratio

Evaluation of Different Strategies for Selective Steam Injection in Stratified Heavy-Oil Reservoirs

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