Numerical well test model of oil-water two-phase flow in fractured and vuggy carbonate reservoir
Abstract view|120|times PDF download|61|times
Abstract
Fractured and vuggy carbonate reservoirs present a complex storage space with irregularly distributed fractures and caves. Furthermore, these reservoirs typically feature the presence of a substantial bottom aquifer, further complicating the fluid flow dynamics. At present, most well test models for this reservoir are based on discrete media primarily address single-phase flow scenarios, typically considering caves as equipotential bodies. This approach cannot accurately represent the complexities of such reservoirs. In this paper, a three-dimensional numerical well test model for two-phase oil-water flow within fractured and vuggy carbonate reservoirs is introduced. Randomly generated natural fractures are embedded within the reservoir, and the Hagen-Poiseuille law is utilized to describe fluid flow within cave spaces, effectively coupling flow interactions across fractures, caves and the porous rock matrix. The computational domain is discretized by a perpendicular bisection grid, and the finite volume method is used to solve the model, allowing for the calculation of the pressure and saturation fields at each time step. Subsequently, well test type curves are constructed and analyzed, flow regimes are segmented, and sensitivity analysis of model parameters is conducted. The pressure buildup data from well A are interpreted, and the results demonstrate a remarkable agreement between the well test curve and actual data, confirming the capability of the model to capture reservoir characteristics and complex fluid flow phenomena. The findings lay the foundation for the development of numerical well test models tailored to fractured and vuggy carbonate reservoirs.
Document Type: Original article
Cited as: Xu, G., Yin, H., Zhang, D., Fu, J., Xing, C. Numerical well test model of oil-water two-phase flow in fractured and vuggy carbonate reservoir. Advances in Geo-Energy Research, 2023, 10(2): 91-103. https://doi.org/10.46690/ager.2023.11.04
Keywords
Full Text:
PDFReferences
Cayeux, E., Skadsem, H., Daireaux, B., et al. Challenges and solutions to the correct interpretation of drilling friction tests. Paper SPE/IADC-184657 Presented at SPE/IADC Drilling Conference and Exhibition, The Hague, The Netherlands, 14-16 March, 2017.
Chen, P., Wang, X., Liu, H., et al. A pressure-transient model for a fractured-vuggy carbonate reservoir with large-scale cave. Geosystem Engineering, 2015, 19(2): 69-76.
Corbett, P., Geiger, S., Borges, L., et al. The third porosity system: Understanding the role of hidden pore systems in well-test interpretation in carbonates. Petroleum Geoscience, 2012, 18(1): 73-81.
Dong, Y., Tian, W., Li, P., et al. Numerical investigation of complex hydraulic fracture network in naturally fractured reservoirs based on the XFEM. Journal of Natural Gas Science and Engineering, 2021, 96: 104272.
Du, X., Li, Q., Lu, Z., et al. Pressure transient analysis for multi-vug composite fractured vuggy carbonate reservoirs. Journal of Petroleum Science and Engineering, 2020, 193: 107389.
Guo, J., Nie, R., Jia, Y. Dual permeability flow behavior for modeling horizontal well production in fractured-vuggy carbonate reservoirs. Journal of Hydrology, 2012, 464: 281-293.
Huang, W., Cui, Y., Xu, F., et al. An innovative approach to permeability estimation of the fractured-vuggy carbonate reservoirs based on 2D images. Journal of Petroleum Science and Engineering, 2021, 199: 108293.
Jia, Y., Fan, X., Nie, R., et al. Flow modeling of well test analysis for porous-vuggy carbonate reservoirs. Transport in Porous Media, 2013, 97: 253-279.
Jiao, F. Practice and knowledge of volumetric development of deep fractured-vuggy carbonate reservoirs in Tarim Basin, NW China. Petroleum Exploration and Development, 2019, 46(3): 576-582.
Kamal, M., Morsy, S., Suleen, F., et al. Determination of in-situ reservoir absolute permeability under multiphase-flow conditions using transient well testing. SPE Reservoir Evaluation and Engineering, 2019, 22(1): 336-350.
Kang, Z., Wu, Y., Li, J., et al. Modeling multiphase flow in naturally fractured vuggy petroleum reservoirs. Paper SPE 102356 Presented at SPE Annual Technical Conference and Exhibition, San Antonio, Texas, 24-27 September, 2006.
Kolin, S., Kurevija, T., Grebenar, D. Pressure build-up test analysis of the reservoir system with the multiphase flow. Rudarsko-geološko-naftni zbornik, 2018, 33(3): 75-84.
Li, Y., Wang, D. Development strategy optimization of gas injection huff and puff for fractured-caved carbonate reservoirs. Paper SPE 182746 Presented at SPE Kingdom of Saudi Arabia Annual Technical Symposium and Exhibition, Dammam, Saudi Arabia, 25-28 April, 2016.
Li, Y., Wang, Q., Li, B., et al. Dynamic characterization of different reservoir types for a fractured caved carbonate reservoir. Paper SPE 188113 Presented at SPE Kingdom of Saudi Arabia Annual Technical Symposium and Exhibition, Dammam, Saudi Arabia, 24-27 April, 2017.
Lin, J., He, H., Wang, Y. A well test analysis model of generalized tube flow and seepage coupling. Petroleum Exploration and Development, 2021, 48(4): 923-934.
Liu, H. Semi-analytical solution for bottomhole pressure transient analysis of a hydraulically fractured horizontal well in a fracture-cavity reservoir. Scientific Reports, 2022, 12: 22095.
Liu, B., Jin, Y., Chen, M. Influence of vugs in fractured-vuggy carbonate reservoirs on hydraulic fracture propagation based on laboratory experiments. Journal of Structural Geology, 2019, 124: 143-150.
Liu, S., Liu, Z., Zhang, Z., et al. Numerical study on hydraulic fracture-cavity interaction in fractured-vuggy carbonate reservoir. Journal of Petroleum Science and Engineering, 2022, 213: 110426.
Liu, J., Liu, Z., Zou, N., et al. A well test model study of multi fracture-vug combination for fractured vuggy carbonate reservoirs. Paper ID 444 Presented at International Conference on Applied Energy, Bangkok/Virtual, 1-10 December, 2020.
Lu, X., Wang, Y., Yang, D., et al. Characterization of paleo-karst reservoir and faulted karst reservoir in Tahe Oilfield, Tarim Basin, China. Advances in Geo-Energy Research, 2020, 4(3): 339-348.
Nie, R. S., Jia, Y. L., Yu, J., et al. The transient well test analysis of fractured-vuggy triple-porosity reservoir with the quadratic pressure gradient term. Paper SPE 120927 Presented at 2009 SPE Latin American and Caribbean Petroleum Engineering Conference, Cartagena, Colombia, 31 May-3 June, 2009.
Popov, P., Bi, L., Efendiev, Y., et al. Multiphysics and multiscale methods for modeling fluid flow through naturally fractured vuggy carbonate reservoirs. Paper SPE 105378 Presented at 15th SPE Middle East Oil & Gas Show and Conference held in Bahrain International Exhibition Centre, Kingdom of Bahrain, 11-14 March, 2007.
Spence, S. Keeping the promises-A management framework for delivering ESIA commitments during pipeline construction. Paper SPE 86732 Presented at Seventh SPE International Conference on Health, Safety, and Environment in Oil and Gas Exploration and Production held in Calgary, Alberta, Canada, 29-31 March, 2004.
Sun, H., Ouyang, W., Zhu, S., et al. A new numerical well test method of multi-scale discrete fractured tight sandstone gas reservoirs and its application in the Kelasu Gas Field of the Tarim Basin. Natural Gas Industry B, 2023, 10(2): 103-113.
Sun, J., Schechter, D. Optimization-based unstructured meshing algorithms for simulation of hydraulically and naturally fractured reservoirs with variable distribution of fracture aperture, spacing, length, and strike. SPE Reservoir Evaluation & Engineering, 2015, 18(4): 463-480.
Tang, B., Ren, K., Lu, H., et al. Study on residual oil distribution law during the depletion production and water flooding stages in the fault-karst carbonate reservoirs. Processes, 2023, 11: 2147.
Tian, F., Luo, X., Zhang, W. Integrated geological-geophysical characterizations of deeply buried fractured-vuggy carbonate reservoirs in Ordovician strata, Tarim Basin. Marine and Petroleum Geology, 2019, 99: 292-309.
Wang, Y., Yu, H., Zhang, J., et al. Transient pressure analysis of polymer flooding fractured wells with oil-water two-phase flow. Petroleum Exploration and Development, 2023, 50(1): 175-182.
Xie, F., Zhang, C., Liu, R., et al. Production prediction for fracture-vug carbonate reservoirs using electric imaging logging data. Petroleum Exploration and Development, 2018, 45(2): 369-376.
Xing, C., Yin, H., Liu, K., et al. Well test analysis for fractured and vuggy carbonate reservoirs of well drilling in large scale cave. Energies, 2018, 11(1): 80.
Yang, B., He, J., Lyu, D., et al. Production optimization for water flooding in fractured-vuggy carbonate reservoir-From laboratory physical model to reservoir operation. Journal of Petroleum Science and Engineering, 2020, 184: 106520.
Zhang, Q., Yan, Z., Fan, X., et al. Field monitoring and identification method for overflow of fractured-vuggy carbonate reservoir. Energies, 2023, 16(5): 2399.
Zhang, T., Zeng, X., Guo, J., et al. Numerical simulation on oil-water-particle flows in complex fractures of fractured-vuggy carbonate reservoirs. Journal of Petroleum Science and Engineering, 2022, 208: 109413.
DOI: https://doi.org/10.46690/ager.2023.11.04
Refbacks
- There are currently no refbacks.
Copyright (c) 2023 The Author(s)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.