Miscible Interaction Between Matrix and Fracture: A Visualization and Simulation Study
- Vahapcan Er (University of Alberta) | Tayfun Babadagli (University of Alberta)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- February 2010
- Document Type
- Journal Paper
- 109 - 117
- 2010. Society of Petroleum Engineers
- 5.4.7 Chemical Flooding Methods (e.g., Polymer, Solvent, Nitrogen, Immiscible CO2, Surfactant, Vapex), 4.1.5 Processing Equipment, 4.3.4 Scale, 5.8.6 Naturally Fractured Reservoir, 4.1.2 Separation and Treating
- matrix and fracture dispersivities, miscible flooding, fracture-matrix interaction, diffusion, experimental and numerical modeling
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CO2 injection has been applied in naturally fractured reservoirs (NFRs) for the purpose of enhanced oil recovery (i.e., the Weyburn and Midale fields, Canada; the Wasson and Slaughter fields, USA; and the Bati Raman field, Turkey). The matrix part of these types of reservoirs could potentially be a good storage medium as well. Understanding the matrix/fracture interaction during this process and the dynamics of the flow in this dual-porosity system requires visual analyses. We mimicked fully miscible CO2 injection in NFRs using 2D models with a single fracture and oil (solute)/hydrocarbon solvent pairs. The focus was on the visual pore-scale analysis of miscibility interaction, breakthrough of solvent through fracture, transfer between matrix and fracture, and the dynamics of miscible displacement inside the matrix.
First, matrix/fracture interaction was studied intensively using 2D glass-bead models experimentally. The model was prepared using acrylic sheets and glass beads saturated with oil as a porous medium while a narrow gap of 1-mm size containing filter paper served as a fracture. The first contact miscible solvent (pentane) was injected into the fracture, and the flow distribution was monitored using an image-acquisition and -processing system. The produced solvent and solute were continuously analyzed for compositional study. The effects of several parameters, such as flow rate, viscosity ratio (oil/solvent), and gravity, were studied. Next, the process was modeled numerically using a commercial compositional simulator, and the saturation distribution in the matrix was matched to experimental data. The key parameters in the matching process were the effective diffusion coefficients and the longitudinal and the transverse dispersivities. The diffusion coefficients were specified for each fluid, and dispersivities were assigned into gridblocks separately for the fracture and the matrix.
|File Size||1 MB||Number of Pages||9|
da Silva, F.V. and Belery, P. 1989. Molecular Diffusion in NaturallyFractured Reservoirs: A Decisive Recovery Mechanism. Paper SPE 19672presented at the SPE Annual Technical Conference and Exhibition, San Antonio,Texas, USA, 8-11 October. doi: 10.2118/19672-MS.
Er, V. and Babadagli, T. 2007. Visual Investigations on the Oil Recovery andSequestration Potential of CO2 in Naturally Fractured Reservoir. Paper CIPC2007-33 presented at the CIM 58th Annual Technical Meeting/CanadianInternational Petroleum Conference (CIPC), Calgary, 12-14 June.
Firoozabadi, A. 1994. MiscibleDisplacement in Fractured Porous Media: Part 1--Experiments. Paper SPE27743 presented at the SPE/DOE Improved Oil Recovery Symposium, Tulsa, 17-20April. doi: 10.2118/27743-MS.
Garder, A.O. Jr., Peaceman, D.W., and Pozzi, A.L. Jr. 1964. Numerical Calculation ofMultidimensional Miscible Displacement by the Method of Characterization.SPE J. 4 (1): 26-36; Trans., AIME, 231. SPE-683-PA. doi:10.2118/683-PA.
Goss, M.J. 1971. Determinationof Dispersion and Diffusion of Miscible Liquids in Porous Media by a FrequencyResponse Method. Paper SPE 3525 presented at the Fall Meeting of theSociety of Petroleum Engineers of AIME, New Orleans, 3-6 October. doi:10.2118/3525-MS.
Islaz-Juarez, R., Smanego V., F., Luna, E., Perez-Rosales, C., and Cruz, J.2004. Experimental Study EffectiveDiffusion in Porous Media. Paper SPE 92196 presented at SPE InternationalConference in Mexico, Puebla, Mexico, 8-9 November. doi: 10.2118/92196-MS.
Leahy-Dios, A. and Firoozabadi, A. 2007. A Unified Model for DiffusionCoefficient Prediction in Non-Ideal Petroleum Fluids. Paper SPE 113021presented at the SPE Annual Technical Conference and Exhibition, Anaheim,California, USA, 11-14 November. doi: 10.2118/113021-STU.
Lenormand, R., Le Romancer, J.F., Le Gallo, Y., and Bourbiaux, B. 1998. Modeling the Diffusion Flux BetweenMatrix and Fissure in a Fissured Reservoir. Paper SPE 49007 Presented atthe SPE Annual Technical Conference and Exhibition, New Orleans, 27-30September. doi: 10.2118/49007-MS.
Perez-Cardenas, F., Cruz-Hernandez, J., and Perez-Rosales, C. 1990. MiscibleDisplacement in Fractured Porous Media. Paper SPE 20798 available from SPE,Richardson, Texas.
Perkins, T.K., and Johnston, O.C. 1963. A Review of Diffusion and Dispersion inPorous Media. SPE J. 3 (1): 70-84; Trans., AIME,228. SPE-480-PA. doi: 10.2118/480-PA.
Thompson, J.L. and Mungan, N. 1969. A Laboratory Study of Gravity Drainagein Fractured Systems under Miscible Conditions. SPE J. 9 (2): 247-254; Trans., AIME, 246. SPE-2232-PA. doi:10.2118/2232-PA.
Trivedi, J.J. and Babadagli, T. 2006. Efficiency of Miscible Displacementin Fractured Porous Media. Paper SPE 100411 presented at the SPE WesternRegional AAPG Pacific Section/GSA Cordilleran Section Joint Meeting, Anchorage,8-10 May. doi: 10.2118/100411-MS.
Trivedi, J.J. and Babadagli, T. 2008. Scaling miscibledisplacement in fractured porous media using dimensionless numbers. J.Pet. Sci. Eng. 61 (2-4): 58-66.doi:10.1016/j.petrol.2008.03.001.