In order to lessen the computational time in fractured oil reservoir simulations, all fractures are usually assumed to be as one equivalent fracture at the center or around the model. This, specially, has applications in industrial engineering software, where this assumption applies. In this study, using two general contradictory examples, it is shown that ignoring a fracture network and assuming an equivalent single-fracture has no logical justification and results in a considerable error. The effect of fracture aperture on composition distribution of a binary and a ternary mixture was also investigated. These mixtures were C1 (methane)/n-C4 (normal-butane) and C1 (methane)/C2 (ethane)/n-C4 (normal-butane), which were under diffusion and natural convection. Governing equations were numerically solved using matlab. One of the main relevant applications of this study is where permeability and temperature gradient are the key difference between reservoirs. Compositional distribution from this study could be used to estimate initial oil in place. Using this study, one can find the optimum permeability, namely the permeability at which the maximum species separation happens, and the threshold permeability (or fracture aperture), after which the convection imposes its effect on composition distribution. It is found that the threshold permeability is not constant from reservoir to reservoir. Also, one can find that full mixing happens in the model, namely heavy and light densities of top and bottom mix up together in the model. Furthermore, after maximum separation point, convection causes unification of components.
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April 2019
Research-Article
Numerical Simulation of the Impact of Natural Fracture on Fluid Composition Variation Through a Porous Medium
Ali Papi,
Ali Papi
Department of Chemical Engineering,
Faculty of Engineering,
Shahid Bahonar University of Kerman,
P.O. Box 76169133,
Kerman, Iran
Faculty of Engineering,
Shahid Bahonar University of Kerman,
P.O. Box 76169133,
Kerman, Iran
Search for other works by this author on:
Ali Mohebbi,
Ali Mohebbi
Department of Chemical Engineering,
Faculty of Engineering,
Shahid Bahonar University of Kerman,
P.O. Box 76169133,
Kerman, Iran
e-mails: amohebbi@uk.ac.ir;
amohebbi2002@yahoo.com
Faculty of Engineering,
Shahid Bahonar University of Kerman,
P.O. Box 76169133,
Kerman, Iran
e-mails: amohebbi@uk.ac.ir;
amohebbi2002@yahoo.com
Search for other works by this author on:
S. Ehsan Eshraghi
S. Ehsan Eshraghi
Omid Petro Energy Khavaran Co.,
Science and Technology Park,
P.O. Box 113654563,
Mashhad, Iran;
Science and Technology Park,
P.O. Box 113654563,
Mashhad, Iran;
Institute of Petroleum Engineering,
School of Chemical Engineering,
Faculty of Engineering,
University of Tehran,
P.O. Box 113654563,
Tehran, Iran
School of Chemical Engineering,
Faculty of Engineering,
University of Tehran,
P.O. Box 113654563,
Tehran, Iran
Search for other works by this author on:
Ali Papi
Department of Chemical Engineering,
Faculty of Engineering,
Shahid Bahonar University of Kerman,
P.O. Box 76169133,
Kerman, Iran
Faculty of Engineering,
Shahid Bahonar University of Kerman,
P.O. Box 76169133,
Kerman, Iran
Ali Mohebbi
Department of Chemical Engineering,
Faculty of Engineering,
Shahid Bahonar University of Kerman,
P.O. Box 76169133,
Kerman, Iran
e-mails: amohebbi@uk.ac.ir;
amohebbi2002@yahoo.com
Faculty of Engineering,
Shahid Bahonar University of Kerman,
P.O. Box 76169133,
Kerman, Iran
e-mails: amohebbi@uk.ac.ir;
amohebbi2002@yahoo.com
S. Ehsan Eshraghi
Omid Petro Energy Khavaran Co.,
Science and Technology Park,
P.O. Box 113654563,
Mashhad, Iran;
Science and Technology Park,
P.O. Box 113654563,
Mashhad, Iran;
Institute of Petroleum Engineering,
School of Chemical Engineering,
Faculty of Engineering,
University of Tehran,
P.O. Box 113654563,
Tehran, Iran
School of Chemical Engineering,
Faculty of Engineering,
University of Tehran,
P.O. Box 113654563,
Tehran, Iran
1Corresponding author.
Contributed by the Petroleum Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received May 28, 2017; final manuscript received October 17, 2018; published online November 26, 2018. Assoc. Editor: Ray (Zhenhua) Rui.
J. Energy Resour. Technol. Apr 2019, 141(4): 042901 (16 pages)
Published Online: November 26, 2018
Article history
Received:
May 28, 2017
Revised:
October 17, 2018
Citation
Papi, A., Mohebbi, A., and Ehsan Eshraghi, S. (November 26, 2018). "Numerical Simulation of the Impact of Natural Fracture on Fluid Composition Variation Through a Porous Medium." ASME. J. Energy Resour. Technol. April 2019; 141(4): 042901. https://doi.org/10.1115/1.4041839
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