The Characterization of the Rock Microscopic Pore Structure before and after Strong Base ASP Flooding

Abstract:

ASP flooding technology is an important means to further improve oil recovery of oil field later high water-cut stage. As is found in pilot test of ASP flooding, in the process of injecting ASP combinational flooding fluid, alkaline chemical react with the rocks minerals in reservoir and dissolve and elute the portion of the silicon in rocks minerals after injecting into formation. Due to the mixed flow occurred in near well bore zone and the changes in pressure and temperature, produced liquid produces mixed silicon scale near the well .The serious scaling phenomenon has affected the production efficiency and the further popularization of the ASP flooding technology.The serious scaling phenomenon has affected the production efficiency and the further popularization of the ASP flooding technology.It is very important to study and solve the problem of ASP flooding silicon scale.In this paper,we studied the interaction ternary displacement liquid and formation, analysised the physical and chemical processes of silicon scale, researched and analysised the differences on the microscopic pore structure between water flooding cores and ASP flooding cores as well as the situation of silicon scale after the ASP flooding by using SEM technology.

• Periodical: Advanced Materials Research (Volumes 941-944)
• Pages: 2596-2600
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.941-944.2596
• Online since: June 2014
• Authors: Meng Fan*, Yi Kun Liu, Shuang Liang
• Keywords: Alkali Dissolution, ASP Flooding, Scanning Electron Microscope (SEM), Silica Scale

References

[1] Xu Guoming. Strong base ASP flooding are faced with the problem and countermeasures[J]. Oil and gas field surface engineering, 2008(11): 70-71.

[2] Young Park K, Kyu-Hong A, Kyu Maeng S, et al. Feasibility of sludgeozonationn for stabilization and conditioning. Ozone: Science and Engineering, 2003, 25(1): 73-80.

[3] Krishnamurthy S, Viraraghanan T. Chemical conditioning for dewatering municipal wastewater sludges[J]. Energy Sources, 2005, 27(l): 113-122.

DOI: 10.1080/00908310490448154

[4] Jia Qing, Zhou Bin, Zhang Ronglan, et al. Development and application of a silicate scale inhibitor for ASP flooding production scale[R]. SPE74675, 2002: 124.

DOI: 10.2118/74675-ms

[5] Hurk J H. Comparison of sodium carbonate, sodium hydroxide and sodium orthosilicate for EOR[J]. SPE12039, (1983).

[6] Zhou Zhigang. Polymer flooding oil production: Let the deep scientific listen to deploy, [N]. Daqing daily, 2007, 10-8(B01).

[7] Cheng Jiexheng. Daqing petroleum geology and development，During the period of 15, daqing oilfield eor technology progress and the next step research direction [J]. 2006, 25(1): 18-22.

[8] Xu Guomin. Problems and Solutions in ASP flooding with alkali [J]. Oil-Gasfield Surface Engineering, 2008, 11: 70-71.

[9] Wang Xian-Jun, Xie Chao-Ying, Wang Qing-Guo. Chemical and Mineral Composition Analyses of Scale Substances Formed in Producing Wells of ASP-Combinational Flooding Reservoir[J]. Oilfield　Chemistry, 2003, 04: 307-309+330.

[10] Liu Dongsheng, Li Jinling, Li Tiande, Zheng Yan, Zhang Xin, Wang Wei. Scaling characteristics of silicon and anti-scaling measures in ASP flooding with alkali[J]. Acta Petrolei Sinica. 2007, 5(28): 139-142.

DOI: 10.2118/122966-ms