Phase Behavior of Gas Condensates in Shales Due to Pore Proximity Effects: Implications for Transport, Reserves and Well Productivity

Devegowda, Deepak; Sapmanee, Kanin; Civan, Faruk; Sigal, Richard F.

doi:10.2118/160099-ms

Cited by 95 publications

(67 citation statements)

References 36 publications

(22 reference statements)

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“…The results are critically important for accurate forecast of shale gas productions where the permeability of tight reservoirs can be in nanoscales. These explain reasons for the significant production of condensate liquids from the nanoporous media in contrast to what is expected based on the industry's collective experience with conventional reservoirs (Didar and Akkutlu, 2013;Devegowda et al, 2012).…”

Section: Resultsmentioning

confidence: 87%

“…The shifts of critical temperatures of O 2 , Ar, Xe, CO 2 , C 2 H 4 , and N 2 are collected from Morishige et al (1997), Morishige and Shikimi (1998), Zarragoicoechea and Kuz (2004); CH 4 from Didar and Akkutlu (2013), Singh et al (2009), Vishnyakov et al (2001, Ortiz et al (2005), Devegowda et al (2012); and C 4 H 10 from Singh et al (2009). As pore size decreases the critical temperature reduces almost linearly.…”

Section: Resultsmentioning

confidence: 99%

“…Calculations are compared with molecular simulation of CH 4 (Didar and Akkutlu, 2013;Devegowda et al, 2012), C 4 H 10 ), and C 8 H 18 . Negative pressure shifts are discarded Devegowda et al, 2012). Results are deviated mainly because of neglecting surface tension effects.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, comparison with another classical EOS, such as PR, is shown. A thorough literature survey (Didar and Akkutlu, 2013;Singh et al, 2009;Morishige et al, 1997;Morishige and Shikimi, 1998;Zarragoicoechea and Kuz, 2004;Vishnyakov et al, 2001;Ortiz et al, 2005;Jana et al, 2009;Devegowda et al, 2012) is performed to collect the critical shifts obtained from experiments and molecular simulation.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Thermodynamics phase changes of nanopore fluids

Islam

Patzek

Sun

2015

Journal of Natural Gas Science and Engineering

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Section: Resultsmentioning

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermodynamics phase changes of nanopore fluids

Islam

Patzek

Sun

2015

Journal of Natural Gas Science and Engineering

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“…al. (1996), Brusilovsky (1990), Firoozabadi (1999, Shapiro & Stanby (1996), Nagy (2002), Didar & Akkutlu (2013), Pang et al (2012), Devegowda et al (2012), Firincioglu et al (2012). In authors opinion the condition of necessary to form continuous liquid phase is oil wettability.…”

Section: State Of the Art Of Research Of Vle In The Porous Mediamentioning

confidence: 99%

Confined Phase Envelope of Gas-Condensate Systems in Shale Rocks

Nagy¹,

Siemek²

2014

Archives of Mining Sciences

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KRZYWA NASYCENIA UKŁADÓW GAZOWO-KONDENSATOWYCH W NANOPOROWYCH SKAŁACHNatural gas from shales (NGS) and from tight rocks are one of the most important fossil energy resource in this and next decade. Significant increase in gas consumption, in all world regions, will be marked in the energy sector. The exploration of unconventional natural gas & oil reservoirs has been discussed recently in many conferences. This paper describes the complex phenomena related to the impact of adsorption and capillary condensation of gas-condensate systems in nanopores. New two phase saturation model and new algorithm for search capillary condensation area is discussed. The algorithm is based on the Modified Tangent Plane Criterion for Capillary Condensation (MTPCCC) is presented. The examples of shift of phase envelopes are presented for selected composition of gas-condensate systems.Keywords: unconventional natural gas, shale gas, gas condensate, capillary condensation, adsorption, phase envelope, nanopores, Blue Gas Gaz ziemny z łupków (NGS) oraz z ze złóż niskoprzepuszczalnych (typu 'tight') staje się jednym z najważniejszych zasobów paliw kopalnych, w tym i następnym dziesięcioleciu. Znaczący wzrost zużycia gazu we wszystkich regionach świata zaznacza się głównie w sektorze energetycznym. Rozpoznawanie niekonwencjonalnych złóż gazu ziemnego i ropy naftowej w ostatnim czasie jest omawiane w wielu konferencjach. Niniejszy artykuł opisuje złożone zjawiska związane z wpływem adsorpcji i kapilarnej kondensacji w nanoporach w złożach gazowo-kondensatowych. Pokazano nowy dwufazowy model równowagowy dwufazowy i nowy algorytm wyznaczania krzywej nasycenia w obszarze kondensacji kapilarnej. Algorytm bazuje na kryterium zmodyfikowanym płaszczyzny stycznej dla kapilarnej kondensacji (MTPCCC). Przykłady zmiany krzywych nasycenia są przedstawiane w wybranym składzie systemów gazowo-kondensatowych Słowa kluczowe: gaz niekonwencjonalny, gaz z łupków, gaz kondensatowy, kondensacja kapilarna,

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Numerical Simulation of Multiphase Flow in Nanoporous Organic Matter With Application to Coal and Gas Shale Systems

Song

et al. 2018

Water Resources Research

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Fluid flow in nanoscale organic pores is known to be affected by fluid transport mechanisms and properties within confined pore space. The flow of gas and water shows notably different characteristics compared with conventional continuum modeling approach. A pore network flow model is developed and implemented in this work. A 3‐D organic pore network model is constructed from 3‐D image that is reconstructed from 2‐D shale SEM image of organic‐rich sample. The 3‐D pore network model is assumed to be gas‐wet and to contain initially gas‐filled pores only, and the flow model is concerned with drainage process. Gas flow considers a full range of gas transport mechanisms, including viscous flow, Knudsen diffusion, surface diffusion, ad/desorption, and gas PVT and viscosity using a modified van der Waals' EoS and a correlation for natural gas, respectively. The influences of slip length, contact angle, and gas adsorption layer on water flow are considered. Surface tension considers the pore size and temperature effects. Invasion percolation is applied to calculate gas‐water relative permeability. The results indicate that the influences of pore pressure and temperature on water phase relative permeabilities are negligible while gas phase relative permeabilities are relatively larger in higher temperatures and lower pore pressures. Gas phase relative permeability increases while water phase relative permeability decreases with the shrinkage of pore size. This can be attributed to the fact that gas adsorption layer decreases the effective flow area of the water phase and surface diffusion capacity for adsorbed gas is enhanced in small pore size.

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Phase Behavior of Gas Condensates in Shales Due to Pore Proximity Effects: Implications for Transport, Reserves and Well Productivity

Abstract: Cop ThisThis revie offic repr

Cited by 95 publications

References 36 publications

Thermodynamics phase changes of nanopore fluids

Thermodynamics phase changes of nanopore fluids

Confined Phase Envelope of Gas-Condensate Systems in Shale Rocks

Numerical Simulation of Multiphase Flow in Nanoporous Organic Matter With Application to Coal and Gas Shale Systems

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