Influence of Filling Medium on Water Injection in Fracture-Vuggy Reservoir
Abstract
The Tahe oilfield is characterized with high degree of filling medium in an underground caves and shortage of bottom water in some unites. In addition, it has poor oil displacement effect with water injection, and low recovery rate. Considering geological interpretation results, the cave filling models with different filling mediums are designed. Through physical simulation experiments, the displacement mechanism between the un-filled areas and the filling medium were fully studied. Meanwhile, the effect of filling medium’s wettability, pore size and fluid elastic energy on the oil-water displacement efficiency were clarified. The results showed that: In the process of oil-water displacement, the capillary resistance in the oil-wet filling medium may hinder the oil-water gravity differentiation, making it impossible for the oil in the filling medium to be replaced effectively, so there is a large amount of remaining oil in the filling medium. The stronger the oil wettability of the filing medium and the smaller pore size, the lower the displacement efficiency. Increasing injecting pressure could only increase the formation energy and improve oil production at the beginning, but it could not improve oil displacement efficiency in filling medium. Injection of surfactant could reduce the oil-water interfacial tension and improve the oil phase utilization degree of the filling medium effectively. Field application has the same results with the experiment, so the surfactant injection is an EOR method to improve oil displacement for fracture-cave reservoir with high degree of filling medium.
Keywords
Full Text:
PDFReferences
[1] Xu, T., Lun, Z. M., & Zhang, X. H. (2010). Gravity drainage in oil-wet carbonate matrix rock system. Petroleum Exploration and Development, 37(3), 358-362.
[2] Lü, A. M., & Yao, J. (2007). The variation of water cut in fractured-vuggy reservoir with bottom water. Xinjiang Petroleum Geology, 3, 23.
[3] Moctezuma-Berthier, A., & Fleury, M. (2000, January). Permeability mapping on vuggy core sample using tracer experiments and stream-line simulations. Paper presented at SPE International Petroleum Conference and Exhibition in Mexico.
[4] Cruz-Hernandez, J., Islas-Juarez, R., Perez-Rosales, C., Rivas-Gomez, S., Pineda-Munoz, A., & Gonzalez-Guevara, J. A. (2001, January). Oil displacement by water in vuggy fractured porous media. Paper presented at SPE Latin American and Caribbean Petroleum Engineering Conference.
[5] Arbogast, T., Brunson, D. S., Bryant, S. L., & Jennings, J. W. (2004). A preliminary computational investigation of a macro-model for vuggy porous media. Developments in Water Science, 55, 267-278.
[6] Zhang, L., Nair, N. G., Jennings, J. W., & Bryant, S. L. (2005). Models and methods for determining transport properties of touching-vug carbonates. Paper presented at SPE Annual Technical Conference and Exhibition.
[7] Egermann, P., Laroche, C., Manceau, E., Delamaide, E., & Bourbiaux, B. J. (2007). Experimental and numerical study of water-gas imbibition phenomena in vuggy carbonates. SPE Reservoir Evaluation & Engineering, 10(1), 86-96.
[8] Izgec, O., Zhu, D., & Hill, A. D. (2010). Numerical and experimental investigation of acid wormholing during acidization of vuggy carbonate rocks. Journal of Petroleum Science and Engineering, 74(1), 51-66.
[9] Kang, Z. H. (2006). Principium experiment of oil seepagedriven by water in fracture and vug reservoir of carbonater ocks. West China Petroleum Geosciences, 2(1), 87-90.
[10] Wang, L., Dou, Z. L., Lin, T., Zhao, H. Y., & Luo, J. (2011). Study on the visual modeling of water flooding in carbonate fracture-cavity reservoir. Journal of Southwest Petroleum University (Science & Technology Edition), 33(2), 121-124.
[11] Rezaei, N., Mohammadzadeh, O., James, L. A., & Chatzis, I. (2014). Experimental investigation of the VAPEX process in vuggy porous media. SPE Journal, 19(1), 101-108.
[12] Li, S., & Li, Y. (2010). An experimental research on water injection to replace the oil in isolated caves in fracture-cavity carbonate rock oilfield. Journal of Southwest Petroleum University (Science & Technology Edition), 1, 21.
[13] Li, A. F., Zhang, D., & Gao, C. H. (2012). Law of water injector production in fractured-vuggy unit with enclosed boundry and constant volume. PGRE, 19(3), 94-97.
[14] Wang, J., Liu, H. Q., Xu, J., & Zhang, H. F. (2012). Formation mechanism and distribution law of remaining oil in fracture-cavity reservoirs. Petroleum Exploration and Development, 39(5), 585-590.
[15] Brinkman, H. C. (1947). A calculation of the viscous force exerted by a flowing fluid on a dense swarm of particles. Appl. Sci. Res., 1(1), 27-34.
[16] Firoozabadi, A., & Markeset, T. (1992, January). An experimental study of capillary and gravity crossflow fractured porous media. Paper presented at SPE Annual Technical Conference and Exhibition.
[17] Fumagalli, A., & Scotti, A. (2013). A numerical method for two-phase flow in fractured porous media with non-matching grids. Advances in Water Resources, 62, 454-464.
[18] Xie, H. J., Li, A. F., Qin, J. F., & Lazaro, B. (2016, August). Manufacture of water wet artificial core by chemical modification method. Paper presented at the International Symposium of the Society of Core Analysts held in Snowmass, Colorado, USA.
DOI: http://dx.doi.org/10.3968/8991
Refbacks
- There are currently no refbacks.
Copyright (c) 2016 XIE Haojun
This work is licensed under a Creative Commons Attribution 4.0 International License.
Share us to: 
Reminder
We are currently accepting submissions via email only.
The registration and online submission functions have been disabled.
Please send your manuscripts to aped@cscanada.net，or aped@cscanada.org for consideration. We look forward to receiving your work.
We only use three mailboxes as follows to deal with issues about paper acceptance, payment and submission of electronic versions of our journals to databases:
caooc@hotmail.com; aped@cscanada.net; aped@cscanada.org
Articles published in Advances in Petroleum Exploration and Development are licensed under Creative Commons Attribution 4.0 (CC-BY).
ADVANCES IN PETROLEUM EXPLORATION AND DEVELOPMENT Editorial Office
Address:1055 Rue Lucien-L'Allier, Unit #772, Montreal, QC H3G 3C4, Canada.
Telephone: 1-514-558 6138
Website: Http://www.cscanada.net
Http://www.cscanada.org
E-mail:office@cscanada.net; office@cscanada.org
Copyright © 2010 Canadian Research & Development Centre of Sciences and Cultures 
