1-20 of 30420 Search Results for

Diffusion

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 22–24, 2019
Paper Number: URTEC-2019-85-MS
... Abstract The dominant transient flow regime for multi-fractured horizontal wells producing from low-permeability and shale (unconventional) reservoirs has historically been interpreted to be transient linear flow (TLF) in the framework of classical diffusion (CD). Recently, observed...
Proceedings Papers

Paper presented at the SPE Trinidad and Tobago Section Energy Resources Conference, June 25–26, 2018
Paper Number: SPE-191237-MS
... shale gas reservoirs, multiple mechanisms cannot be ignored. In this paper, we develop a novel analytical model to accurately estimate the volume of SRV in shale gas reserviors by incorporating both Knudsen diffusion of bulk gas and surface diffusion of adsorbed gas directly into the model. Depending on...
Journal Articles
Journal: SPE Journal
SPE Journal 22 (02): 505–520.
Paper Number: SPE-179550-PA
Published: 12 December 2016
...M.. Ghasemi; W.. Astutik; S. A. Alavian; C. H. Whitson; L.. Sigalas; D.. Olsen; V. S. Suicmez Summary This paper presents a novel technique to determine multicomponent diffusion coefficients for carbon dioxide (CO 2 ) injection in a North Sea chalk field (NSCF) in Norway at reservoir conditions...
Journal Articles
Journal: SPE Journal
SPE Journal 21 (05): 1583–1611.
Paper Number: SPE-2014-1921039-PA
Published: 20 October 2016
... significantly different from that of conventional gas reservoirs, which is mainly caused by the nanoscale phenomena and organic matter as a medium of gas sourcing and storage. The gas-transfer mechanism includes bulk-gas transfer and adsorption-gas surface diffusion in nanopores of SGRs, where the bulk-gas...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 11–13, 2016
Paper Number: SPE-179550-MS
... Abstract This paper presents a novel technique to determine multi-component diffusion coefficients for CO 2 injection in a North Sea Chalk Field (NSCF) at reservoir conditions. Constant volume diffusion (CVD) method is used, consisting of an oil-saturated chalk core in contact with an...
Journal Articles
Journal: SPE Journal
SPE Journal 26 (02): 857–882.
Paper Number: SPE-201393-PA
Published: 14 April 2021
... volume in the ultratight matrix consists of nanopores in which the notion of viscous flow may become irrelevant. Instead, multiple transport and storage mechanisms should be considered to model fluid transport within the shale matrix, including molecular diffusion, Knudsen diffusion, surface diffusion...
Proceedings Papers

Paper presented at the SPE Heavy Oil Conference-Canada, June 10–12, 2014
Paper Number: SPE-170182-MS
... In this equation, C g is the concentration of gas into bitumen; D is the molecular diffusion coefficient, ρ is the density of the liquid solution, z is the vertical coordinate direction, ω g is mass fraction of gas in solution (= C g / ρ ) and u b is the liquid solution velocity. If...
Proceedings Papers

Paper presented at the SPE Europec, December 1–3, 2020
Paper Number: SPE-200596-MS
... Abstract Molecular diffusion is a transport mechanism often ignored in conventional, non-fractured multi-component petroleum upstream simulations due to the predominance of convection. In unconventional fractured reservoirs, diffusion plays a vital role in hydrocarbon production. A "shale...
Proceedings Papers

Paper presented at the The Fourteenth ISOPE Pacific/Asia Offshore Mechanics Symposium, November 22–25, 2020
Paper Number: ISOPE-P-20-129
... aggregate and the numerical model of concrete are proposed to respectively determine the chloride diffusion coefficient of ITZ in concrete. The comparisons of normalized ITZ chloride diffusion coefficients obtained according to the methods of experiment and numerical model are elaborated. Particularly, an...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-202616-MS
... Abstract Tight unconventional reservoirs are being developed in the global natural gas market. Gas production from unconventional tight reservoirs such as coalbeds or shales is a multi-physics process where diffusion and sorption are coupled. Gas diffusion, the complex flow mechanism in the...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201269-MS
... and diffusion of the CO 2 / n -decane mixtures in the nanopores. The Peng-Robinson (PR) equation of state is combined with Young-Laplace equation to calculate the phase-composition diagram at the presence of capillary pressure. The equilibrium molecular dynamics simulations (MDS) are also conducted to...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201311-MS
... been carried out using commercial simulators, for example, the role of molecular diffusion ( Yu et al., 2014 ; Wan and Sheng, 2015 ), the impact of nanopore confinement ( Yu et al., 2019 ; Luo et al., 2020 ; Zhan et al., 2020 ; Zhang et al., 2020 ), complex natural fractures ( Yu et al., 2019 ) and...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201393-MS
... nanopores in which the notion of viscous flow may become irrelevant. Instead, multiple transport and storage mechanisms should be considered to model fluid transport within the shale matrix, including molecular diffusion, Knudsen diffusion, surface diffusion, and sorption. This paper presents a diffusion...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201621-MS
... Abstract The diffusion equation in heterogeneous porous media is solved analytically with the integral transform technique given by Mikhailov and Ozisik (1984 ). The method enabled us to write the solution of the pressure-rate deconvolution as an infinite series of eigenmodes (eigenfunctions...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201653-MS
... research. The complexity arises from different flow physics such as pressure flow and diffusion. Many of the field performance forecasts constantly underestimate production from these reservoirs because most of the current models ignore important governing physics. This study provides new insights on...
Proceedings Papers

Paper presented at the SPE Canada Heavy Oil Conference, September 28–October 2, 2020
Paper Number: SPE-199961-MS
... solvent dilution ( Motahhari and Khaledi, 2018 ). Molecular diffusion coefficient is used to predict the diffusional mass transfer in solvent-aided processes. Despite its importance, there is no universally acceptable approach for its estimation, particularly for systems of low-soluble solvents and...
Journal Articles
Journal: SPE Journal
SPE Journal (2020)
Paper Number: SPE-195941-PA
Published: 23 September 2020
...Xuanqing Lou; Nirjhor Chakraborty; Zuleima T. Karpyn; Luis F. Ayala; Narayana Nagarajan; Zein Wijaya Summary The design of oil-recovery processes by gas injection or vapor solvent relies on the knowledge of diffusion coefficients to enable meaningful production predictions. However, laboratory...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 20–22, 2020
Paper Number: URTEC-2020-2566-MS
... Abstract Observed deviations from classical diffusion (specifically transient linear flow, TLF) for Permian Basin Wolfcamp shale (oil) wells have historically been attributed to anomalous diffusion (AD) and reservoir heterogeneity. Recently, the authors have suggested that the combination of...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 20–22, 2020
Paper Number: URTEC-2020-3254-MS
... Abstract The transport of methane in shale is complicated by the heterogeneous pore structure, inhomogeneous surface properties arising from complex mineralogy, and the presence of adsorbed/bound water. With such complexities, the contribution of advection and diffusion to the transport of...
Proceedings Papers

Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 20–22, 2020
Paper Number: URTEC-2020-2203-MS
... URTeC: 2203 Novel Techniques to Measure Oil-Gas Diffusion at High Pressure & High Temperature Conditions: Application for Huff-n-Puff EOR in Shale Sanchay Mukherjee, Son Thai Dang, Chandra Rai and Carl Sondergeld. Mewbourne School of Petroleum and Geological Engineering, The University of Oklahoma...

Product(s) added to cart

Close Modal