Application of Polymers in Low Permeability Formations
Author(s)
Juan Zhao1,2,
Caili Dai3,
Guang Yang1,2,
Jian Zhang1,2,
Hui Yang4,
Xinsheng Xue1,2,
Xiaodong Kang1,2,
Lixia Li1,2
Affiliation(s)
1 State Key Laboratory of Offshore Oil Exploitation, Beijing, China. 2 CNOOC Research Institute, Beijing, China. 3 China University of Petroleum (East China), Qingdao, China. 4 Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, the Chinese Academy of Sciences, Beijing, China.
1 State Key Laboratory of Offshore Oil Exploitation, Beijing, China. 2 CNOOC Research Institute, Beijing, China. 3 China University of Petroleum (East China), Qingdao, China. 4 Key Laboratory of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, the Chinese Academy of Sciences, Beijing, China.
ABSTRACT
For low-permeability sandstone reservoir with big channel, we researched the novel deep profile method alternative injection of anionic and cationic polymer. Evaluating various factors on adsorption capacity through lab test, the results show that with the increase of temperature, the adsorption capacity decreases and the cationic polymer is easier to be absorbed. With the increase of salinity, adsorption time or polymer concentration, the adsorption capacity increases. The adsorption equilibrium concentration of cationic polymer is 1500 mg/L; adsorption equilibrium time is 8 h. The adsorption equilibrium concentration of anionic polymer is 1000 mg/L; adsorption equilibrium time is 6 h. Physical simulation experiment shows that alternative injection of anionic and cationic polymer is better than injection of single polymer, and preferential injection of cationic polymer is better than preferential injection of anionic polymer. With the increase of injection rounds, sealing capacity gets better, but in view of cost, the rounds should not be more than 3. The profile control technique can obviously enhanced oil recovery, and water displacement recovery increases 41%. 2 wells were tested successfully in Henan Oilfield in June 2010. Approximate 154.47 tons of incremental oil was obtained with 2% water-cut decrease.
For low-permeability sandstone reservoir with big channel, we researched the novel deep profile method alternative injection of anionic and cationic polymer. Evaluating various factors on adsorption capacity through lab test, the results show that with the increase of temperature, the adsorption capacity decreases and the cationic polymer is easier to be absorbed. With the increase of salinity, adsorption time or polymer concentration, the adsorption capacity increases. The adsorption equilibrium concentration of cationic polymer is 1500 mg/L; adsorption equilibrium time is 8 h. The adsorption equilibrium concentration of anionic polymer is 1000 mg/L; adsorption equilibrium time is 6 h. Physical simulation experiment shows that alternative injection of anionic and cationic polymer is better than injection of single polymer, and preferential injection of cationic polymer is better than preferential injection of anionic polymer. With the increase of injection rounds, sealing capacity gets better, but in view of cost, the rounds should not be more than 3. The profile control technique can obviously enhanced oil recovery, and water displacement recovery increases 41%. 2 wells were tested successfully in Henan Oilfield in June 2010. Approximate 154.47 tons of incremental oil was obtained with 2% water-cut decrease.
KEYWORDS
Anionic and Cationic Polymer, Alternative Injection, Sealing Capacity, Water Displacement Recovery Increment
Anionic and Cationic Polymer, Alternative Injection, Sealing Capacity, Water Displacement Recovery Increment
Cite this paper
Zhao, J. , Dai, C. , Yang, G. , Zhang, J. , Yang, H. , Xue, X. , Kang, X. and Li, L. (2015) Application of Polymers in Low Permeability Formations. Journal of Materials Science and Chemical Engineering, 3, 37-45. doi: 10.4236/msce.2015.35005.
Zhao, J. , Dai, C. , Yang, G. , Zhang, J. , Yang, H. , Xue, X. , Kang, X. and Li, L. (2015) Application of Polymers in Low Permeability Formations. Journal of Materials Science and Chemical Engineering, 3, 37-45. doi: 10.4236/msce.2015.35005.
References
[1] Zhu, W.Y., Ju, Y., Zhao, M., Chen, Q. and Yang, Z.M. (2002) Spontaneous Imbibition Mechanism of Flow through Porous Media and Waterflooding in Low-Permeability Fractured Sandstone Reservoir. Acta Petrolei Sinica, 23, 56-59.
http://www.cnki.com.cn/Article/CJFDTotal-SYXB200206015.htm [2] Feng, Q.H. (2006) Advanced Reservior Engineering. University of Petroleum Press, Dongying, 169-170． [3] Xu, Y.G. and Liu, S. (2005) Study on Inflow Performance of Oil Wells in Low-Permeability Reservoirs. Acta Petrolei Sinica, 26, 77-80.
http://wenku.baidu.com/view/22f58389d0d233d4b14e6967.html [4] Zhang, T.Z., Chen, J. and Tian, N.L. (2001) The Research on Profile Control Technology of Bonan Low Permeability Oilfield. Drilling & Production Technology, 24, 42-43. [5] Fu, J.T., Peng, S.P., Li, A.F., et al. (2002) Experimental Study on Cationic Polymer Oil Displacement Profile Control during High Water Content Period. Petroleum Drilling Techniques, 30, 59-60. [6] Liu, Y., Liu, Y.H., Gu, C.S., et al. (2008) Survey of the Mechanism on Ploymer Flooding. Inner Mongolia Petrochemical Industry, 21, 115.
http://wenku.baidu.com/link?url=ts2VDONqG8g4IMXGf4tbUi6GGs3krDXbmMt0OavJEo9TvTBzzkNXsgRXIpw0pZXCE0i9BUnM1H_1bHZOQlNMs-18-mmTnTgZ8RTWzdciF7W [7] Zhao, F.L. (2001) Chemicals for Oil Recovery. University of Petroleum Press, Dongying, 58-59. [8] Zhao, F.L. (2006) Principle of EOR. China University of Petroleum Press, Dongying, 39-41. [9] Li, J.S., Yao, T.Y. and Liu, X.G. (2005) The Relationship between Zeta Potential of Sandstone Surface and Porous Flow Process. Journal of Northwest University: Natural Science Edition, 35, 459-462．
http://www.cnki.com.cn/Article/CJFDTOTAL-XBDZ200504022.htm [10] Guan, S.X., Fan, H.F., Duan, J.G. and Song, C.H. (2007) Examination of the Concentration of HPAM—The Starch- Cadmium Iodine Method. Journal of Daqing Petroleum Institute, 31, 110-112.
http://www.cqvip.com/QK/92021X/2007002/24309390.html
[1] Zhu, W.Y., Ju, Y., Zhao, M., Chen, Q. and Yang, Z.M. (2002) Spontaneous Imbibition Mechanism of Flow through Porous Media and Waterflooding in Low-Permeability Fractured Sandstone Reservoir. Acta Petrolei Sinica, 23, 56-59.
http://www.cnki.com.cn/Article/CJFDTotal-SYXB200206015.htm [2] Feng, Q.H. (2006) Advanced Reservior Engineering. University of Petroleum Press, Dongying, 169-170． [3] Xu, Y.G. and Liu, S. (2005) Study on Inflow Performance of Oil Wells in Low-Permeability Reservoirs. Acta Petrolei Sinica, 26, 77-80.
http://wenku.baidu.com/view/22f58389d0d233d4b14e6967.html [4] Zhang, T.Z., Chen, J. and Tian, N.L. (2001) The Research on Profile Control Technology of Bonan Low Permeability Oilfield. Drilling & Production Technology, 24, 42-43. [5] Fu, J.T., Peng, S.P., Li, A.F., et al. (2002) Experimental Study on Cationic Polymer Oil Displacement Profile Control during High Water Content Period. Petroleum Drilling Techniques, 30, 59-60. [6] Liu, Y., Liu, Y.H., Gu, C.S., et al. (2008) Survey of the Mechanism on Ploymer Flooding. Inner Mongolia Petrochemical Industry, 21, 115.
http://wenku.baidu.com/link?url=ts2VDONqG8g4IMXGf4tbUi6GGs3krDXbmMt0OavJEo9TvTBzzkNXsgRXIpw0pZXCE0i9BUnM1H_1bHZOQlNMs-18-mmTnTgZ8RTWzdciF7W [7] Zhao, F.L. (2001) Chemicals for Oil Recovery. University of Petroleum Press, Dongying, 58-59. [8] Zhao, F.L. (2006) Principle of EOR. China University of Petroleum Press, Dongying, 39-41. [9] Li, J.S., Yao, T.Y. and Liu, X.G. (2005) The Relationship between Zeta Potential of Sandstone Surface and Porous Flow Process. Journal of Northwest University: Natural Science Edition, 35, 459-462．
http://www.cnki.com.cn/Article/CJFDTOTAL-XBDZ200504022.htm [10] Guan, S.X., Fan, H.F., Duan, J.G. and Song, C.H. (2007) Examination of the Concentration of HPAM—The Starch- Cadmium Iodine Method. Journal of Daqing Petroleum Institute, 31, 110-112.
http://www.cqvip.com/QK/92021X/2007002/24309390.html