Evaluation of Cyclic Solvent Injection (‘Huff-n-Puff’) in Artificially-Fractured Shale Core Samples: Experiments &amp; Modeling

Song, Chengyao; Clarkson, Christopher R.; Hamdi, Hamidreza; Ghanizadeh, Amin

doi:10.15530/urtec-2020-3038

Cited by 4 publications

(8 citation statements)

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“…Experimental workflow and procedure. The key steps/experiments for core-based HNP, reproduced from Song et al 28 , were as follows:…”

Section: Methodsmentioning

confidence: 99%

“…1. The liquid permeability device used for steady-state liquid flow tests was calibrated using previouslydesigned in-house permeability standards (micro-capillaries embedded into impermeable acrylic plugs, references within Song et al 28 ). To pass the calibration, the measured permeability values should be within ± 15% of the calculated permeability value.…”

Section: Methodsmentioning

confidence: 99%

“…Apart from experimental design optimization, compositional numerical simulation is used in this work to history-match each cycle, enabling the fundamental controlling mechanisms to be explored after the experiments are completed. As a continuation of a previous work focused on CO 2 HNP 28 , the current study is the first to couple experimental and modeling approaches for core-based comparison of CO 2 and (simplified) lean gas HNP performance in low-permeability fractured reservoirs.…”

Section: Openmentioning

confidence: 99%

“…(a,b) Oil recovery and injection/production pressures (4 cycles) as a function of (elapsed) time for the CO 2 and lean gas HNP cycles performed on twin core plug samples (a). CO 2 data are adopted from Song et al 28 while lean gas data are generated in this work. Pressure decay profiles for CO 2 and lean gas in an enlarged view (b).…”

Section: Co 2 Vs Simplified Lean Gas Hnpmentioning

confidence: 99%

“…Cumulative gas production and injection/production pressures as a function of (elapsed) time for the CO 2 and lean gas HNP cycles performed on the twin core plug samples (4 cycles). CO 2 data are adopted from Song et al 28 while lean gas data are generated in this work. www.nature.com/scientificreports/ the core with large permeability and adjustable pore volumes.…”

Section: Co 2 Vs Simplified Lean Gas Hnpmentioning

confidence: 99%

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Experimental and computational evaluation of cyclic solvent injection in fractured tight hydrocarbon reservoirs

Ghanizadeh

Song

Hamdi

et al. 2021

Sci Rep

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Multi-fractured horizontal wells have enabled commercial production from low-permeability (‘tight’) hydrocarbon reservoirs but recoveries remain exceedingly small (< 5–10%). As a result, operators have investigated the use of solvent (gas) injection schemes, such as huff-n-puff (HNP), to improve oil recovery. Previous HNP laboratory approaches, classified primary as ‘flow-through-matrix’ and ‘flow-around-matrix’ typically (1) are not fully representative of field conditions at near-fracture regions and (2) require long test times, even when performed on fractured cores. The objectives of this proof-of-concept study are to (1) design and implement a new experimental procedure that better reproduces HNP schemes in near-fracture regions and (2) use the results, simulated with a compositional lab-calibrated model, to explore the controls on enhanced hydrocarbon recovery in depleted tight oil plays. Performing multiple CO2 and (simplified) lean gas HNP cycles, the integrated experimental and simulation approach proposed herein achieves the ultimate recovery factors in a significantly shorter time frame (25–50%) compared to previous studies. The integrated experimental and computational approach proposed herein is valuable for core-based evaluation of cyclic solvent (CO2, CH4) injection in tight hydrocarbon reservoirs for (1) hydrocarbon recovery and (2) subsurface greenhouse (CO2, CH4) gas disposal/storage applications.

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“…Experimental workflow and procedure. The key steps/experiments for core-based HNP, reproduced from Song et al 28 , were as follows:…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Openmentioning

confidence: 99%

Section: Co 2 Vs Simplified Lean Gas Hnpmentioning

confidence: 99%

Section: Co 2 Vs Simplified Lean Gas Hnpmentioning

confidence: 99%

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Experimental and computational evaluation of cyclic solvent injection in fractured tight hydrocarbon reservoirs

Ghanizadeh

Song

Hamdi

et al. 2021

Sci Rep

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Relative permeability of tight hydrocarbon systems: An experimental study

Ghanizadeh

Song

Clarkson

et al. 2021

Fuel

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Huff-n-Puff Technology for Enhanced Oil Recovery in Shale/Tight Oil Reservoirs: Progress, Gaps, and Perspectives

et al. 2021

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In recent times, particularly in the 21st century, there has been an alarming increase in the demand for global energy, along with continuous depletion in conventional oil reservoirs. This necessity has incentivized interested scholars and operators worldwide to seek alternative oil resources. To secure such accelerating energy demand, considerable effort has been directed toward the development of previously unconventional oil formations that, in past decades, had remained sidelined. Although shale oil reservoirs have seen tremendous success over the past decade, the continued challenges of rapidly declining oil flow rates and oil retention in the pores continuously persist. Substantial attempts have been made to improve shale-bypassed oil recovery; however, there is little data about the accessibility on recovery mechanisms, especially in the oil field. Furthermore, approachesparticularly, Huff-n-Puff (H-n-P) experiments using conventional proceduresfail to properly represent field conditions and they generate deceptive findings, because the utilized cores are not simulated under realistic reservoir conditions, leaving the significance of critical factors unclear. Therefore, this review study comprehensively and specifically discusses the feasibility of enhanced oil recovery (EOR) methods in unconventional oil reservoirs. Beside addressing the validity of the currently applied H-n-P technology in shale/tight oil reservoirs and underlining some critical gaps regarding laboratory results, modified technology is proposed in this paper for a better field future performance. The study is divided into sections, and each section analyzes the role of one specific H-n-P portion in detail, such as preferable injected solvents, their mechanisms, and critical factors affecting H-n-P recovery. The exceptions to this are the first and second sections, which provide a brief introduction about shale and tight oil reservoirs, a history of applied technology, and the method’s current problem statement. In the Introduction section, the authors will justify why this Review fills a critical gap in the field. Within the assessment study, great focus is given to the H-n-P technique, its parameters, and effective processes. In the final sections, carefully chosen experimental results and tools are reviewed to highlight the controversy and state “the gap”.

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Evaluation of Cyclic Solvent Injection (‘Huff-n-Puff’) in Artificially-Fractured Shale Core Samples: Experiments & Modeling

Cited by 4 publications

References 0 publications

Experimental and computational evaluation of cyclic solvent injection in fractured tight hydrocarbon reservoirs

Experimental and computational evaluation of cyclic solvent injection in fractured tight hydrocarbon reservoirs

Relative permeability of tight hydrocarbon systems: An experimental study

Huff-n-Puff Technology for Enhanced Oil Recovery in Shale/Tight Oil Reservoirs: Progress, Gaps, and Perspectives

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