A new approach for the simulation of fractured vuggy carbonate reservoir with an application to upscaling

Sunhua Gao, John E. Killough, Jie He, Mohamed Fadlelmula, F. Yuhe Wang, Michael L. Fraim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Numerical modeling of naturally fractured vuggy reservoirs presents many challenges due to the coexistence of three very different kinds of media and their complex interaction on multiple scales. With current computing capabilities, conventional fine-scale single-porosity models are not practical for large-scale reservoir simulation. A multi-continuum reservoir model is presented as an effective approach to modeling fractured vuggy reservoirs on the coarse scale. This model consists of four different porosity systems, i.e. the matrix, fractures, isolated vugs and connected vugs. This study investigates mass exchange between different porosity systems with the final objective of developing new transfer functions that can be used as an application to upscaling fractured vuggy reservoir models. A well-designed procedure is proposed to obtain the novel transfer functions in multi-continuum fractured vuggy reservoir models. Different realizations of the vug-filled matrix blocks are generated to show the effect of vug fraction, distribution and connectivity on multi-phase fluid flow. For interporosity flow between vugs and the other two media, new formulations of the shape factors that incorporate the effect of vug spatial variation are developed respectively. The dominant mechanisms of multiphase fluid exchange between each two porosity systems (matrix-isolated vugs, fractures-connected vugs) are discussed separately. New transfer functions for multiphase flow in the multi-continuum fractured vuggy model to capture the complex flow mechanisms and emulate the results of the fine-grid model are provided. In addition, a transmissibility multiplier table is introduced as another connection term for the transfer functions to improve the accuracy of upscaling solution. Finally, a new upscaling approach by incorporating the proposed transfer functions into multi-continuum models is presented. This paper provides a new insight to the complex fluid exchange among three different media in fractured vuggy reservoirs. Results show that the new upscaling methodology helps to reduce the size of simulation model and improve the computational speed significantly, while providing an accurate representation of the fine-scale results.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - SPE Reservoir Characterisation and Simulation Conference and Exhibition, RCSC 2017
PublisherSociety of Petroleum Engineers
Pages1369-1391
Number of pages23
ISBN (Electronic)9781510841970
Publication statusPublished - 1 Jan 2017
EventSPE Reservoir Characterisation and Simulation Conference and Exhibition, RCSC 2017 - Abu Dhabi, United Arab Emirates
Duration: 8 May 201710 May 2017

Other

OtherSPE Reservoir Characterisation and Simulation Conference and Exhibition, RCSC 2017
CountryUnited Arab Emirates
CityAbu Dhabi
Period8/5/1710/5/17

Fingerprint

upscaling
Carbonates
carbonate
transfer function
Transfer functions
simulation
Porosity
porosity
matrix
Fluids
fluid
Multiphase flow
multiphase flow
coexistence
modeling
fluid flow
connectivity
Flow of fluids
spatial variation
methodology

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology

Cite this

Gao, S., Killough, J. E., He, J., Fadlelmula, M., Yuhe Wang, F., & Fraim, M. L. (2017). A new approach for the simulation of fractured vuggy carbonate reservoir with an application to upscaling. In Society of Petroleum Engineers - SPE Reservoir Characterisation and Simulation Conference and Exhibition, RCSC 2017 (pp. 1369-1391). Society of Petroleum Engineers.

A new approach for the simulation of fractured vuggy carbonate reservoir with an application to upscaling. / Gao, Sunhua; Killough, John E.; He, Jie; Fadlelmula, Mohamed; Yuhe Wang, F.; Fraim, Michael L.

Society of Petroleum Engineers - SPE Reservoir Characterisation and Simulation Conference and Exhibition, RCSC 2017. Society of Petroleum Engineers, 2017. p. 1369-1391.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Gao, S, Killough, JE, He, J, Fadlelmula, M, Yuhe Wang, F & Fraim, ML 2017, A new approach for the simulation of fractured vuggy carbonate reservoir with an application to upscaling. in Society of Petroleum Engineers - SPE Reservoir Characterisation and Simulation Conference and Exhibition, RCSC 2017. Society of Petroleum Engineers, pp. 1369-1391, SPE Reservoir Characterisation and Simulation Conference and Exhibition, RCSC 2017, Abu Dhabi, United Arab Emirates, 8/5/17.
Gao S, Killough JE, He J, Fadlelmula M, Yuhe Wang F, Fraim ML. A new approach for the simulation of fractured vuggy carbonate reservoir with an application to upscaling. In Society of Petroleum Engineers - SPE Reservoir Characterisation and Simulation Conference and Exhibition, RCSC 2017. Society of Petroleum Engineers. 2017. p. 1369-1391
Gao, Sunhua ; Killough, John E. ; He, Jie ; Fadlelmula, Mohamed ; Yuhe Wang, F. ; Fraim, Michael L. / A new approach for the simulation of fractured vuggy carbonate reservoir with an application to upscaling. Society of Petroleum Engineers - SPE Reservoir Characterisation and Simulation Conference and Exhibition, RCSC 2017. Society of Petroleum Engineers, 2017. pp. 1369-1391
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