Nitrogen for the Enhanced Recovery of Oil and Gas

Clancy, J.P.; Gilchrist, R.E.; Kroll, Dan

doi:10.2118/9912-ms

Cited by 12 publications

(3 citation statements)

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“…Dong carried out an experimental study on the dynamic expansion coefficient of crude oil, and his results indicate that the dynamic expansion coefficient of a CO 2 -tight oil system is higher than that of an N 2 -tight oil system. Although CO 2 has been shown to have the highest potential for tight oil recovery among different injection gas media, N 2 has received increasing attention from scholars because it has a more abundant source of gas, lower cost, , and noncorrosive nature, and more stable oil recovery rate than CO 2 . , Because of the benefits of N 2 , some scholars have proposed research on CO 2 slug N 2 flooding, , which combines the advantages of both CO 2 and N 2 . As an example, N 2 -assisted cyclic CO 2 injection has achieved economical results. , Fischer et al .…”

Section: Introductionmentioning

confidence: 99%

Novel Approach to Enhancing Tight Oil Recovery Using N₂-Assisted CO₂ Flooding and Its Potential for CO₂ Storage

et al. 2023

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Four types of gas injection experimentsCO2 flooding, N2 flooding, alternating CO2 and N2 flooding, and CO2 pre-slug N2 floodingwere conducted in a 28.42 cm long core plug to study the production performances of a CO2 and N2 flooding model in enhancing the tight oil flooding efficiency. Experimental results indicate that the following. (1) For CO2 and N2 flooding, the highest tight oil flooding efficiency is achieved at a gas injection rate of 0.10 mL/min, with a CO2 flooding efficiency of 68.75%, a gas breakthrough time of 0.33 PV, a CO2 utilization of 11.35 Mscf/stb, an N2 flooding efficiency of 38.46%, and a gas breakthrough time of 0.42 PV. (2) For alternating CO2 and N2 flooding, the highest tight oil flooding efficiency is 56%, and the CO2 utilization is 7.97 Mscf/stb. (3) The highest tight oil flooding efficiency is 53.08% for CO2 pre-slug N2 flooding. A comparison of the experimental results indicates that a larger CO2 slug leads to a higher oil flooding efficiency. The CO2 plug size has less influence on the recovery rate before breakthrough. The larger the CO2 plug after breakthrough, the higher the recovery rate. The optimized N2 injection time is the CO2 breakthrough time (0.33 PV). In the optimized case, flooding efficiency and contribution indicate the optimal CO2 slug size at 0.50 PV. When pure CO2 is injected at 0.50 PV and the gas is switched to N2, the recovery is 5.82%, and the contribution is 9.20%. When pure CO2 is injected at 0.50 PV, followed by the continuous injection of pure CO2, the recovery rate is 8.59% and the contribution rate is 12.49%. The difference between the recovery rates of the two methods is small, so the best injection timing for N2 is 0.17 PV after CO2 breakthrough, and the oil flooding efficiency is 63.27%.

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Section: Introductionmentioning

confidence: 99%

Novel Approach to Enhancing Tight Oil Recovery Using N₂-Assisted CO₂ Flooding and Its Potential for CO₂ Storage

et al. 2023

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“…It should be noted that chemical methods are recommended for 2500 m wells and thermal methods are recommended for 1000 m wells. Gas methods are the only ones to increase oil recovery of deep deposits; among other things, the use of dioxide carbon, carbon, nitrogen, and flue gases is meant (Clancy, Gilchrist, & Kroll, 1981;Mungan, 2000;Indrupskiy, Zakirov, & Kondrat, 2013).…”

Section: Introductionmentioning

confidence: 99%

Analysis of possibilities to increase oil recovery with the use of nitrogen in the context of deep oil deposits of the Dnipro-Donetsk oil-and-gas Ukrainian province

Kondrat¹,

Lukin²,

Smolovyk³

2019

Min. miner. depos.

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Purpose is to increase oil recovery of deep oil deposits of the Dnipro-Donetsk oil-and-gas Ukrainian province with the use of nitrogen.Methods. Experiments, intended to residual oil displacement with the use of different driving agents, involved laboratory modeling of the process when a seam was simulated as such being close maximally to a real seam and samples of formation fluids were applied. The experiments, which materialized equilibrium displacement (without mass transfer), used seam models developed from cores of V-19n seam (Perekopivske deposit). 43 core samples were analyzed with 3.3 -226.0•10 -3 µm 2 permeability.Findings. Characteristics and applicability of nitrogen and flue gas to increase oil recovery have been analyzed. Theoretic prerequisites of the mechanism, aimed at oil displacement using nitrogen and flue gases, have been formulated. Results of the laboratory experiments of oil displacement by means of nitrogen within a porous environment have helped determine that minimum pressure of mutual oil and nitrogen dissolution is 36.0 -38.0 MPa. In terms of mutual mixing of agents at 110 -112°С temperature, 36.4 МPа gas injection pressure, and nitrogen pumping velocity being 1 cm 3 per 40 minutes, oil displacement ratio achieved 0.76 -0.78. Originality.For the first time, parameters of mixable oil displacement using nitrogen for the conditions of deep oil deposits of the Dnipro-Donetsk petroleum province in Ukraine have been determined. Efficiency of mixable nitrogen displacement to compare with water displacement and nitrogen displacement under equilibrium conditions has been proved. Practical implications.The advanced technique of nitrogen use to improve oil recovery in the context of deep oil deposits has been proposed. The technique is applicable to extract residual oil from the depleted deposits.

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“…Higher proportions can be a result of nitrogen miscible flooding. Nitrogen flooding is generally done to maintain reservoir pressure above saturation conditions and to enhance oil recovery [4,5]. Such kind of secondary recovery technique is applicable mostly for light oils and reservoirs with a depth capable of supporting pressures above the nitrogen minimum miscible pressure without causing formation damages.…”

Section: Introductionmentioning

confidence: 99%

Determination of bubble point pressure of two live oils with injected nitrogen by quartz crystal resonator

Orlandi

Daridon

Carrier

2017

Eur. Phys. J. Spec. Top.

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An experimental investigation of bubble pressure determination of two live oils with injected nitrogen is presented in this work. Conventional bubble point measurement is done with the aid of a constant expansion test. In such method the bubble point is characterized by an inflection in the PV curve as the oil becomes saturated. For some oils the PV curve is smoothed and it becomes difficult or impossible to accurately determine the bubble point. This work demonstrates that in such cases, the use of quartz crystal resonator technique makes it possible. This technique is successfully applied to determine the bubble point pressure of two live oils in which nitrogen is injected up to 40 mol%.

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Nitrogen for the Enhanced Recovery of Oil and Gas

Cited by 12 publications

References 1 publication

Novel Approach to Enhancing Tight Oil Recovery Using N₂-Assisted CO₂ Flooding and Its Potential for CO₂ Storage

Novel Approach to Enhancing Tight Oil Recovery Using N₂-Assisted CO₂ Flooding and Its Potential for CO₂ Storage

Analysis of possibilities to increase oil recovery with the use of nitrogen in the context of deep oil deposits of the Dnipro-Donetsk oil-and-gas Ukrainian province

Determination of bubble point pressure of two live oils with injected nitrogen by quartz crystal resonator

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Nitrogen for the Enhanced Recovery of Oil and Gas

Cited by 12 publications

References 1 publication

Novel Approach to Enhancing Tight Oil Recovery Using N2-Assisted CO2 Flooding and Its Potential for CO2 Storage

Novel Approach to Enhancing Tight Oil Recovery Using N2-Assisted CO2 Flooding and Its Potential for CO2 Storage

Analysis of possibilities to increase oil recovery with the use of nitrogen in the context of deep oil deposits of the Dnipro-Donetsk oil-and-gas Ukrainian province

Determination of bubble point pressure of two live oils with injected nitrogen by quartz crystal resonator

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Novel Approach to Enhancing Tight Oil Recovery Using N₂-Assisted CO₂ Flooding and Its Potential for CO₂ Storage

Novel Approach to Enhancing Tight Oil Recovery Using N₂-Assisted CO₂ Flooding and Its Potential for CO₂ Storage