Study on Variation of Reservoir Parameters in Different Injection Stage

Abstract:

In the old oilfields, Reservoir properties have a certain change in the long-term effects of the injected water, studying variation of reservoir parameter in different injection stage has important Significance, it can help to determine the distribution of remaining oil in different washing stage and make reasonable recovery methods. In this paper, combined with experimental data from a large number of samples in different washing stage and numerical analysis method, the variation of parameters of different reservoirs in different washing stage is analyzed, the conclusion includes: With the water washing degree increasing, flow capacity of class I reservoir increased gradually; There is rapid growth under a certain degree of water injection condition, the aim reservoir is divided into four classes. In the class III and IV reservoirs, average pore throat radius is less influence by washing. Water washing degree has the least impact on class I reservoir and there has the greatest impact on class IV reservoir. The influence of washing level is the greatest on the class I reservoir and the poorest on the class IV reservoir.

• Periodical: Applied Mechanics and Materials (Volume 618)
• Pages: 514-518
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.618.514
• Online since: August 2014
• Authors: Yan Zhang*, Shuang Yu
• Keywords: Average Pore Throat Radius, Feature Structure Coefficient, Relative Sorting Coefficient, Reservoir Parameters

References

[1] Zhou Congcong, Sun Hong-guo, Wang Xiaodong A prediction method of waterflood recovery factor based on microscopic pore structure parameters. SpecialOil and Gas Reservoirs, (2009): 61-63.

[2] Li Yiyuan. Study on the variation of water flooding development index and its controlling factors. Northeast Petroleum University. (2012).

[3] Ma Xupeng. Internal relationship between physical property and micro-pore structure of reservoir. PEG, (2010): 216~219.

[4] Cun gui, Xu Shouyu. Law of pore structure variety in reservoir during a long episode waterflooded development[J]. Petroleum Exploration and Development, (2003) : 94-96.

[5] Cai Yi, Lei Yang, Zhao Yuehua, Wang Zhizhang. Variation law of the micro-geological features of the reservoir before and after a long term water flooding in He3 reservoir of Shuanghe oilfield. Petroleum Geology &Oilfield Development in Daqing, (2004).