Investigation on Mechanisms of Polymer Enhanced Oil Recovery by Nuclear Magnetic Resonance and Microscopic Theoretical Analysis
ZHANG Ji-Cheng1, SONG Kao-Ping1, LIU Li2, YANG Er-Long1
1Key Laboratory of Enhanced Oil Recovery of Ministry of Education of China, Daqing Petroleum Institute, Daqing 1633182Institute of Porous Flow and Fluid Mechanics, National Petroleum Corporation of China, Langfang 065007
Investigation on Mechanisms of Polymer Enhanced Oil Recovery by Nuclear Magnetic Resonance and Microscopic Theoretical Analysis
1Key Laboratory of Enhanced Oil Recovery of Ministry of Education of China, Daqing Petroleum Institute, Daqing 1633182Institute of Porous Flow and Fluid Mechanics, National Petroleum Corporation of China, Langfang 065007
摘要Polymer flooding is an efficient technique to enhance oil recovery over water flooding. There are lots of discussions regarding the mechanisms for polymer flooding enhancing oil recovery. The main focus is whether polymer flooding can increase sweep efficiency alone, or can increase both of sweep efficiency and displacement efficiency. We present a study on this problem. Oil displacement experiments on 4 natural cores show that polymer flooding can increase oil recovery efficiency by more than 12% over water. Moreover, photos are taken by the nuclear magnetic resonance (NMR) method both after water flooding and after polymer flooding, which show remaining oil saturation distribution at the middle cross section and the central longitudinal section. Analyses of these photos demonstrate that polymer flooding can increase both sweep efficiency and displacement efficiency.
Abstract：Polymer flooding is an efficient technique to enhance oil recovery over water flooding. There are lots of discussions regarding the mechanisms for polymer flooding enhancing oil recovery. The main focus is whether polymer flooding can increase sweep efficiency alone, or can increase both of sweep efficiency and displacement efficiency. We present a study on this problem. Oil displacement experiments on 4 natural cores show that polymer flooding can increase oil recovery efficiency by more than 12% over water. Moreover, photos are taken by the nuclear magnetic resonance (NMR) method both after water flooding and after polymer flooding, which show remaining oil saturation distribution at the middle cross section and the central longitudinal section. Analyses of these photos demonstrate that polymer flooding can increase both sweep efficiency and displacement efficiency.
(Intermolecular and atom-molecule potentials and forces)
引用本文:
ZHANG Ji-Cheng;SONG Kao-Ping;LIU Li;YANG Er-Long. Investigation on Mechanisms of Polymer Enhanced Oil Recovery by Nuclear Magnetic Resonance and Microscopic Theoretical Analysis[J]. 中国物理快报, 2008, 25(5): 1750-1752.
ZHANG Ji-Cheng, SONG Kao-Ping, LIU Li, YANG Er-Long. Investigation on Mechanisms of Polymer Enhanced Oil Recovery by Nuclear Magnetic Resonance and Microscopic Theoretical Analysis. Chin. Phys. Lett., 2008, 25(5): 1750-1752.
[1] Wang X H, Han D K and Guo S P 1994 Acta Petroleum Sin. 15 83 (in Chinese) [2]Zhao Y S et al %, Wei G Z, Lu H M and Zhong L2001 Acta Petroleum Sin. 22 43 (in Chinese) [3]Xia H F, Wang D M and Liu Z C 2001 Acta Petroleum Sin. 22 60 (in Chinese) [4]Wang Q M et al %, Ji B F, Sui J, Guo W K and Ji B Y2001 Petroleum Geology and Oilfield Development in Daqing 20 1 (in Chinese) [5]Tian J P, Yao K L 2002 Chin. Phys. 11 358 [6]Tian J P, Yao K L 1998 Chin. Phys. 7 507 [7] Tian J P, Yao K L 1998 Chin. Phys. 8 577 [8] Tian J P, Yao K L 2001 Chin. Phys. 3 373 [9] Xu Y S, Wu F M 2002 Chin. Phys. 12 1835 [10]Zheng L C, Zhang X X 2003 Chin. Phys. 1 83 [11]Tabor D 1992 J. Phys. D: Appl. Phys. 25 1 [12]Xu J et al %, Luo J B, Lu X C, Wang L L, Pan G S and Wen S Z2005 Nanotechnology 16 859 [13] Tomlinson G A 1929 Philos. Magn. 7 905 [14]Wen S Z 1998 Nano-tribology (Beijing: TsinghuaUniversity Press) p150 (in Chinese) [15] Amontons G 1706 Memories de l'Academie Royal(Amsterdam: Gerald Kuyper) p 257 [16]McClelland G M 1990 Surface Science Springer Series(Berlin: Springer) vol 17 p 1 [17] Frank F C and van der Merwe J H 1949 Proc. Roy. Soc. 198 216 [18] Shinjo K and Hirano M 1993 Surf. Sci. 283 473
2008, Vol. 25 
