Title: A design method of optimising compatibility of polymer flooding system with reservoir

Authors: Hualong Liu; Yiqiang Li; Junxin Gao; Xiaobin Nie; Yishan Liu

Addresses: Enhanced Oil Recovery Institute, China University of Petroleum, Beijing, Beijing 102249, China ' Enhanced Oil Recovery Institute, China University of Petroleum, Beijing, Beijing 102249, China ' Tiandi Energy Consulting (Beijing) Co. Ltd., Beijing 100083, China ' Research Institute of Experiment and Detection, Xinjiang Oilfield Company, Karamay 834000, China ' Enhanced Oil Recovery Institute, China University of Petroleum, Beijing, Beijing 102249, China

Abstract: Based on theory research and experimental studies, a design method of optimising the compatibility between hydrodynamic characteristic size of polymer and reservoir under the pressure gradient of formation displacement has been proposed. Then, the matching relation plate between polymer and reservoir was obtained by defining reference standard of the compatibility between chemical system and reservoir. For the purpose of this study block, with converting formation velocity into 0.3 m/d as the flow performance reference standard, average pore throat radius is determined the core size is more than 6.6 times of the polymer system hydrodynamics characteristics, as the compatibility of polymer system and reservoir boundaries. By explaining the phenomena why some oil displacement system was easily injected but difficult to flow in formation, accurately provided an important basis and technical support for selecting the appropriate polymer. The research considered the pressure gradient difference between the near wellbore and deep formation. [Received: November 13, 2014; Accepted: July 20, 2015]

Keywords: micro-porous membrane; compatibility relations; deep formation; near wellbore; fluid dynamics; feature sizes; flow capability; optimisation; polymer flooding; reservoir boundaries; hydrodynamics; formation displacement; pore throat radius; core size; oil displacement systems; polymer selection; pressure gradient; enhance oil recovery; EOR.

DOI: 10.1504/IJOGCT.2016.078761

International Journal of Oil, Gas and Coal Technology, 2016 Vol.13 No.2, pp.159 - 169

Received: 18 Nov 2014
Accepted: 20 Jul 2015
Published online: 02 Sep 2016 *

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