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Residual Oil Distribution of Heterogeneous Reservoir at Different Water Drive Velocity

  • Xiangzhong ZhangEmail author
  • Lun Zhao
  • Jincai Wang
  • Li Chen
  • Xiangan Yue
Conference paper
Part of the Springer Series in Geomechanics and Geoengineering book series (SSGG)

Abstract

The oil recovery rate is one of the factors affecting remaining oil distribution. Overseas sandstone oilfields were developed with high production rate in the early stage. However, when the oilfield development enters the high-water cut stage, further improving recovery rate has become one of the key issues for the researchers. Based on water displacing oil experiment in sand filling model of heterogeneous reservoirs, residual oil distribution characteristics and oil displacement efficiency of heterogeneous reservoir at different water drive velocity have been studied. Compared with low-speed water drive, high-speed water drive can reduce the micro-sweep efficiency, and ultimately reduce the oil displacement efficiency. There is little residual oil in the region affected by injected water, and the main types of residual oil are local continuous microscopic heterogeneous residual oil, so the key objective of improving oil displacement efficiency is to start micro-heterogeneous residual oil in the region affected injected water. The main directions of further enhancing oil recovery after high-speed water drive in heterogeneous sandstone reservoirs are to improve the microscopic and macroscopic sweep efficiency. The results indicate the direction for further improving the recovery rate of the sandstone reservoir after high-speed water drive.

Keywords

Water displacing oil experiment Water drive velocity High-rate development Residual oil 

Notes

Acknowledgements

This study is funded by the Major Program of PetroChina (2011E-2506).

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Xiangzhong Zhang
    • 1
    Email author
  • Lun Zhao
    • 1
  • Jincai Wang
    • 1
  • Li Chen
    • 1
  • Xiangan Yue
    • 2
  1. 1.PetroChina Research Institute of Petroleum Exploration & DevelopmentBeijingChina
  2. 2.China University of Petroleum—BeijingBeijingChina

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