Graded regulation technology for enhanced oil recovery and water shutoff in pore-cavity-fracture carbonate reservoirs

Wang, Jie; Wang, Ting; Xu, Huaxiang; Jiang, Houshun

doi:10.1016/j.arabjc.2022.103907

Cited by 7 publications

(2 citation statements)

References 17 publications

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“…Thus, according to the parameters of the filtration parameters of the reservoir and the viscosity of the fluid, the optimal drawdown on the reservoir and the pressure at the pump intake are determined. Features of good operation after hydraulic fracturing in complex reservoirs are considered in [129][130][131].…”

Section: Hydraulic Fracturing (Hf)mentioning

confidence: 99%

Overview of Methods for Enhanced Oil Recovery from Conventional and Unconventional Reservoirs

Malozyomov,

Martyushev,

Kukartsev

et al. 2023

Energies

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In world practice, the role of reproduction of raw material base of oil production by implementing modern methods of oil recovery enhancement (thermal, gas, chemical, microbiological) on the basis of innovative techniques and technologies is rapidly growing and is becoming more important. It is concluded that at present, the priority of increasing oil reserves in world oil production is the development and industrial introduction of modern integrated methods of enhanced oil recovery, which can provide a synergistic effect in the development of new and developed oil fields. This article presents a review and comparative analysis of theoretical and practical methods of improving oil recovery of conventional and unconventional reservoirs. The paper examines in detail methods of improving oil recovery, taking into account the factors of enhanced oil recovery of oil reservoirs. Considered the main methods and technologies currently used to develop oil fields and recommendations for their effective use, taking into account the variety of external factors of oil production: the geological structure of the reservoir, its volume, and properties of oils. It is shown that there is no universal method of oil reservoir development, and it must be chosen after a thorough feasibility study among several proposed models. When describing the methods of enhanced oil recovery, special attention is also paid to the physical processes that occur as a result of applying the technology. In conclusion, the positive and negative characteristics of the presented methods included in EOR are presented, and recommendations that may influence the choice of practical solutions for engineers and oil producers are given. Conclusions are made that development systems, placement and choice of operating mode of wells essentially depend on the geological structure of the reservoir, its volume and properties of oils. An important role in this is the construction of a geological model of the production facility. The used hydrodynamic models of development are based on physical laws, about which oil producers sometimes don’t even suspect, and the authors of the models are not always able to convey it to the real producers. The authors consider it reasonable to make a logical generalizing conclusion that understanding processes occurring in the reservoir and taking appropriate measures for optimization and intensification of oil production will allow making oil production as effective as possible.

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Section: Hydraulic Fracturing (Hf)mentioning

confidence: 99%

Overview of Methods for Enhanced Oil Recovery from Conventional and Unconventional Reservoirs

Malozyomov,

Martyushev,

Kukartsev

et al. 2023

Energies

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“…With the rapid development of industry and the continuous increase of human number, the current oil production has been unable to meet the demand of society. After the primary and secondary recovery operations, there is at least 50% residual oil in the reservoirs. − The reason for the low oil recovery is that the water–oil mobility ratio and the oil–water interface tension are usually high to make the oil be easily bypassed by injected water, resulting in the decrease of sweep efficiency. − Meanwhile, the prolonged water flooding development in oilfield aggravates the formation heterogeneity, which causes the displacement fluid channeling and ineffective circulation, and the oil in low permeability zones cannot be started effectively. − For enhancing oil recovery, most oilfields have to be developed by using the tertiary oil recovery technology. The tertiary oil recovery technology includes chemical flooding, gas flooding, steam flooding, microbial flooding, and so on. − Therein, the chemical flooding is the most popular method owing to its high oil recovery.…”

Section: Introductionmentioning

confidence: 99%

Effect of Amphiphilic CaCO₃ Nanoparticles on the Plant Surfactant Saponin Solution on the Oil–Water Interface: A Feasibility Research of Enhanced Oil Recovery

Tian,

Pu,

Wang

et al. 2023

Energy Fuels

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In order to solve the serious problem of oil shortage, the improvement of the emulsification effect of surfactants using nanoparticles was proposed to enhance oil recovery. In this work, first, an amphiphilic nano-calcium carbonate (ANCC) was synthesized, and the dispersion effect of ANCC in saponin solution was studied. It can be found from results that the dispersion effect of ANCC was the best in 5000 ppm of saponin solution, and the dispersion rate decreased with the increase of salinity. Then, the effect of ANCC on the emulsion property, interface tension, and expansion modulus of saponin solution was studied. It can be found from results that with the increase of ANCC concentration, the emulsion rate between saponin and crude oil increased, the water extraction rate decreased, the emulsion particle size decreased, the interface tension decreased, the expansion modulus increased, and the emulsion stability became better. At the same time, with the increase of temperature, the interface tension decreased, and the expansion modulus increased. With the increase of salinity, the interface tension decreased first and then increased, and the expansion modulus decreased. Finally, the effect of ANCC on the oil recovery of saponin solution flooding was studied by displacement experiments. It can be found from results that when the ANCC concentration was 100, 500, and 1000 ppm, the oil recovery was increased, respectively, by 18.42, 20.97, and 24.59%, indicating that the oil recovery gradually increased with the increase of the concentration of ANCC. This work is of great significance for enhanced oil recovery in surfactant flooding.

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Simulation study of water and gas injection process into the Azadegan reservoir for enhanced oil recovery

Farahbod

2023

Engineering Reports

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It is necessary to improve oil production from reservoirs. Various methods have been proposed to increase oil extraction from reservoir. Each method has specific challenges. In this research, the effect of water and gas injection in to Azadegan reservoir has been analyzed. Azadegan oil field is located south of Iran. In this study, water, immiscible gas and water alternating gas injected to reservoir and its effect on enhanced oil recovery have been investigated. Finally, a comparison between results of methods is provided. Results show that effective method for enhanced oil recovery is immiscible gas injection with 46% oil production efficiency and water alternating gas injection with 36% oil production efficiency. This study shows that oil production efficiency can be increased if duration of gas injection is increased. This study shows, increasing viscosity of water in water alternating gas scenario did not improve the production of Azadegan reservoir.

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Graded regulation technology for enhanced oil recovery and water shutoff in pore-cavity-fracture carbonate reservoirs

Cited by 7 publications

References 17 publications

Overview of Methods for Enhanced Oil Recovery from Conventional and Unconventional Reservoirs

Overview of Methods for Enhanced Oil Recovery from Conventional and Unconventional Reservoirs

Effect of Amphiphilic CaCO₃ Nanoparticles on the Plant Surfactant Saponin Solution on the Oil–Water Interface: A Feasibility Research of Enhanced Oil Recovery

Simulation study of water and gas injection process into the Azadegan reservoir for enhanced oil recovery

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Graded regulation technology for enhanced oil recovery and water shutoff in pore-cavity-fracture carbonate reservoirs

Cited by 7 publications

References 17 publications

Overview of Methods for Enhanced Oil Recovery from Conventional and Unconventional Reservoirs

Overview of Methods for Enhanced Oil Recovery from Conventional and Unconventional Reservoirs

Effect of Amphiphilic CaCO3 Nanoparticles on the Plant Surfactant Saponin Solution on the Oil–Water Interface: A Feasibility Research of Enhanced Oil Recovery

Simulation study of water and gas injection process into the Azadegan reservoir for enhanced oil recovery

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Product

Resources

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Effect of Amphiphilic CaCO₃ Nanoparticles on the Plant Surfactant Saponin Solution on the Oil–Water Interface: A Feasibility Research of Enhanced Oil Recovery