Abstract

In order to determine strata combination and optimize injection parameters. This study, making full use of laboratory core flooding experiments, field test data analysis and numerical simulation, focused on the research of strong base ASP flooding about optimum design of well pattern, well spacing, strata combination and injection pattern and parameter aiming at strong base ASP pilot test blocks and industrial promotion test block in Daqing Oilfield. The results show that: strong base ASP flooding technology is well adapted to five-spot pattern. Under the same condition, oil recovery is enhanced orderly from highness to lowness for five-spot pattern, linear pattern, four-spot pattern and inverted nine-spot pattern. The recovery rate of five-spot pattern and inversed nine-spot pattern during strong base ASP is 20.5 and 17.98%. The optimum well spacing for strong base ASP is about 125 m and the decrease of well spacing can increase the controlling area and final recovery of strong base ASP, relieve the scaling of production wells and maintain the injection and production capability. The optimum well spacing makes the best economic benefits.

Keywords:

Determine strata combination, strong base ASP flooding, the mechanism of ASP flooding, the optimization of injection parameters, the optimization of injection pattern,

References

1. Baviere, M., J. Labrid, P. Glénat and V. Plazznet, 1995. Improved EOR by use of chemicals in combination [R]. SPE Reservoir Eng., 10(3): 187-193.
   
2. Cao, X., X. Sui, X. Yang et al., 2001. Understanding of some problems in ASP flooding in Duan xi of Bei1 Area [J]. Petrol. Geol. Oilfield Dev. Daqing, 20(2): 111-113.
   
3. Che, X. and S. Me, 2002. Optimization study of development methods of class-? oil layers of ASP flooding in Sa Bei development area in Daqing Oilfield [J]. Petrol. Geol. Oilfield Dev. Daqing, 23(6): 37-40.
   
4. Cheng, J., G. Liao, Z. Yang et al., 2001. Pilot test of ASP flooding in Daqing oilfield [J]. Petrol. Geol. Oilfield Dev. Daqing, 20(2): 46-49.
   
5. Cheng, J., D. Xu and W. Bai, 2009. Commercial ASP flooding test in Daqing Oilfield [J]. Scientific and Technological Theses Collection of Daqing Oil Field, pp: 278-288.
   
6. Du, X., H. Li, J. Hong et al., 2005. Commercial pilot test of ASP flooding in Central Xing2 area [J]. Petrol. Geol. Oilfield Dev. Daqing, 1(2): 55-58.
   
7. Fu, T., Z. Shao, Y. Bi et al., 2001. Effect of injection rate on the displacement efficiency of polymer flooding [J]. Petrol. Geol. Oilfield Dev. Daqing, 20(2): 63-65.
   
8. Krumine, P.H. and J.S. Falcone Jr., 1983. Surfactant, polymer, and alkali interactions in chemical flooding processes. Proceeding of SPE Oilfield and Geothermal Chemistry Symposium. June 1-3, Denver, Colorado.
   
9. Lan, Y., Q. Yang and B. Li, 2006. Experimental research on sweep efficiency and oil displacement efficiency of polymer flooding [J]. Acta Petrol. Sin., 27(1): 64-68.
   
10. Li, J., X. He, F. Gao, S. Lu and T. Cao, 2004. Physical modeling of ASP flooding slug combination [J]. Petrol. Exp. Dev., 31(4): 126-128.
    
11. Li J., S. Me, X. Yu et al., 2011. Influential factors of ASP displacement efficiency in Daqing oilfield [J]. Petrol. Geol. Oilfield Dev. Daqing, 30(6): 138-142.
    
12. Liao, G., K. Wang and W. Yan, 2001. Experimental study on the effect of mobility ratio on the displacement efficiency of chemical flooding [J]. Petrol. Geol. Oilfield Dev. Daqing, 20(2): 14-16.
    
13. Liu, C., Q. Yang, B. Li et al., 2007. Experimental research on sweep efficiency and oil displacement efficiency of ASP flooding [J]. Petrol. Geol. Oilfield Dev. Daqing, 26(4): 108-111.
    
14. Liu, X., 2006. Dynamic characteristics and comprehensive adjustment measure on test of ASP flooding in Westen North 3 area [J]. Petrol. Geol. Oilfield Dev. Daqing, 25(4): 95-96.
    
15. Ren, W., J. Niu, Y. Zhang et al., 2001. ASP flooding in the west of Xing 2 Area [J]. Petrol. Geol. Oilfield Dev. Daqing, 20(2): 117-118.
    
16. Song, K., E. Yang, Q. Deng et al., 2001. Selection of the rational injection rate for reservoir with polymer flooding [J]. J. Daqing Petrol. Inst., 25(4): 15-18.
    
17. Wang, D., J. Cheng, J. Wu, Z. Yang and Y. Yao, 1999. Summary of ASP pilots in Daqing Oil field [A].Proceeding of the SPE Asia Pacific Improved Oil Recovery Conference. Kuala Lumpur, Malaysia, October 25-26.
    
18. Wang, Y. and H. Huang, 1996. Reltionship between mobility and oil displacing efficiency of petroleum carboxylate/alkaline/polyacrylamide aqueous flooding system [J]. Oilfield Chem., 9(3): 253-255.
    
19. Wu, F. and S. Jia, 2012. Preliminary understanding on ASP flooding experimental regularity of class-? oil layers in Sazhong development area [J]. Petrol. Geol. Eng., 26(1): 112-115.
    
20. Zhang, Y., M. Huang and L. Li, 2001. Pilot test of bio-surfactant ASP flooding with small well spacing [J]. Petrol. Geol. Oilfield Dev. Daqing, 20(2): 114-116.
    

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The authors have no competing interests.

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