Investigation on Circulating Path of Injected Water for High Water-Cut Oilfield

Abstract:

In this paper, the indexes have been determined for identifying ineffective injection-production circulation and corresponding mathematical model was constructed with fuzzy theory. Application examples show that this method is simple, fast and accurate. For high and extra-high water cut oilfields, because of the long-term erosion of injected water, there are some high penetrative channels between the injection and production wells, resulting in most injected water along the channel to cause the invalid injection and production, for which it is hard to increase water flooding swept volume, causing flooding and high water cut well and reducing oil production. To improve the effectiveness of water injection to achieve stable yields, it is important to take the measures of ineffective injection-production wells profile control, plugging and so on for fast and accurate identifying ineffective injection-production wells. To that end, this paper applied fuzzy theory to establishing the mathematical model for identifying ineffective injection-production wells.

• Periodical: Advanced Materials Research (Volumes 1073-1076)
• Pages: 2201-2204
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.2201
• Online since: December 2014
• Authors: Sui Ting Zhao, Qi Li*, Xiao Ru He, Kao Ping Song, Ji Cheng Zhang
• Keywords: Circulating Path, Mathematical Models, Water Flooding

References

[1] ZHAO Yong-qiang, WANG Xiu-peng. Radioactive Isotope Tracer to Study Crosshole High Permeabile Formation [J]. Fault-block Oil & Gas Field, 2002, 9(2): 77-80.

[2] ZHANG Ji-cheng, SONG Kao-ping, LIU Li and YANG Er-long. Investigation on Mechanisms of Polymer Enhanced Oil Recovery by Nuclear Magnetic Resonance and Microscopic Theoretical Analysis [J]. Chinese Physics Letters, May, 2008, 25(5): 1750-1752.

DOI: 10.1088/0256-307x/25/5/062

[3] SONG Zi-qi, ZHAO Lei. Recognizing Watered-out Zones by Using Traditional Well Logs [J]. Journal of Xi an Petroleum Institute, 2003, 18(6): 50-53.

[4] ZHANG Ji-cheng, SONG Kao-ping. Considerable potential remains after Daqing polymer flood [J]. Oil & Gas Journal, Sept. 15, 2008, 106(35): 61-66.

[5] ZHENG Jun-de, ZHANG Hong-liang. Development and Exploitation of Oil and Gas Fields [M]. Beijing: Oil Industry Press, 1997, 176-193.

[6] ZHANG Ji-cheng, SOMH Kao-ping, DU Ruo-xia. Dongguo casing failures derive from many causes [J]. Oil & Gas Journal, Jan. 21, 2008, 106(3): 51-54.

[7] ZHANG Ji-Cheng and SHU Fang-Chun. Gas injection enhances recovery from polymer flood pilot [J]. Oil & Gas Journal, May 21, 2007, 105(19): 45-47.