Evaluation of the Vertical Producing Degree of Commingled Production via Waterflooding for Multilayer Offshore Heavy Oil Reservoirs

Shen, Fei; Cheng, Linsong; Sun, Qiang; Huang, Shijun

doi:10.3390/en11092428

Cited by 14 publications

(9 citation statements)

References 29 publications

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“…To evaluate the producing degree of commingled production, Shen et al [14] presented a one-dimensional linear flow model and a planar radial flow model for water-flooded multilayer offshore heavy oil reservoirs based on the Buckley-Leverett theory. A dynamic method was used to evaluate seepage resistance, sweep efficiency, and oil recovery factor.…”

Section: Overview Of Work Presented In This Special Issuementioning

confidence: 99%

Emerging Advances in Petrophysics: Porous Media Characterization and Modeling of Multiphase Flow

et al. 2019

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With the ongoing exploration and development of oil and gas resources all around the world, applications of petrophysical methods in natural porous media have attracted great attention. This special issue collects a series of recent studies focused on the application of different petrophysical methods in reservoir characterization, especially for unconventional resources. Wide-ranging topics covered in the introduction include experimental studies, numerical modeling (fractal approach), and multiphase flow modeling/simulations.

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Section: Overview Of Work Presented In This Special Issuementioning

confidence: 99%

Emerging Advances in Petrophysics: Porous Media Characterization and Modeling of Multiphase Flow

et al. 2019

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“…Farizal 12 confirmed interlayer cross-flow if reservoir fluids were produced from commingling layers that have unequal initial pressures. Shen 13 established a one-dimensional linear flow model and a planar radial flow model to evaluate seepage resistance, sweep efficiency, and recovery percent during commingling production.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Interference Behaviors of Arbitrary Multilayer Commingling Production in Heavy Oil Reservoirs with Water Flooding

Xue-zhi

Ning

2021

ACS Omega

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To obtain sustainable economical oil production and recovery of investment, some oil fields adopted the strategy of multilayer commingling production at an early stage. This leads to interlayer interference and losing part of the recoverable reserves. In this paper, dynamic interference behaviors of arbitrary multilayer commingling production in heavy oil reservoirs are analyzed. Based on the non-Darcy flow equation, the Buckly–Leverett equation, and the material balance equation, a mathematical model of arbitrary multilayer commingling production is obtained. Oil and water relative permeability, saturation, and bottom hole flow pressure microelement and the iteration method are employed to solve the mathematical model in the time domain. The new model is verified by comparing the results from the typical black oil model using the Darcy law. The sensitivity analysis of critical parameters on interference behaviors, such as permeability, oil viscosity, effective drainage boundary, and voidage replacement ratio, is carried out. The model obtained in this paper can be used for oil and liquid productivity analysis during the overall process of commingling production and extended to be applied in numerical experiments with different combinations of typical parameters as well.

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“…With the continuous exploitation of conventional oil reservoirs, easy-to-exploit light oil is dramatically reduced. Unconventional oil reservoirs, such as heavy oil and oil shale, are the main driving forces for future oilfield production [1][2][3]. Heavy oil and super-heavy oil can be utilized after reducing their viscosity.…”

Section: Introductionmentioning

confidence: 99%

Effects of Packer Locations on Downhole Electric Heater Performance: Experimental Test and Economic Analysis

et al. 2020

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A downhole electric heater, which reduces heat loss along a heat insulation pipe, is a key apparatus used to ignite oil shale underground. Downhole heaters working together with packers can improve the heating efficiency of high-temperature gases, while different packer locations will directly affect the external air temperature of the heater shell and, subsequently, the performance and total cost of the downhole heaters. A device was developed to simulate the external conditions of heater shells at different packer locations. Then, the effects of external air temperature on the performance of a downhole heater with pitches of 50, 160, and 210 mm were experimentally studied. In the test, results indicated that the heater with a packer at its outlet had an accelerated heating rate in the initial stage and decreased temperature in the final stage. Additionally, the lowest heating rod surface temperature and highest comprehensive performance were achieved with minimal irreversible loss and lower total cost when using a downhole electric heater with a packer set at its outlet. In addition, the downhole electric heater with a helical pitch of 50 mm and a packer at its outlet was more effective than other schemes in the high Reynolds number region. These findings are beneficial for shortening the oil production time in oil shale in situ pyrolysis and heavy oil thermal recovery.

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Evaluation of the Vertical Producing Degree of Commingled Production via Waterflooding for Multilayer Offshore Heavy Oil Reservoirs

Cited by 14 publications

References 29 publications

Emerging Advances in Petrophysics: Porous Media Characterization and Modeling of Multiphase Flow

Emerging Advances in Petrophysics: Porous Media Characterization and Modeling of Multiphase Flow

Dynamic Interference Behaviors of Arbitrary Multilayer Commingling Production in Heavy Oil Reservoirs with Water Flooding

Effects of Packer Locations on Downhole Electric Heater Performance: Experimental Test and Economic Analysis

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