Polymer flooding equilibrium displacement leading edge monitoring experiment evaluation device and method

Abstract

The invention discloses a polymer flooding equilibrium displacement leading edge monitoring experiment evaluation device and method. The experiment evaluation device comprises a closed cavity; a plurality of through holes are formed in an upper cover of the closed cavity and used for simulating an exploiting well pattern, and each through hole represents one well position of an oil reservoir. A plurality of oil saturation monitoring electrodes are arranged on the upper cover and embedded into the closed cavity. Compared with the prior art, the monitoring method based on the polymer flooding equilibrium displacement leading edge monitoring experiment evaluation device has the advantages that the influences of the well pattern, the well type, the injection amount ratio, the alternate injection mode and the like on the equilibrium displacement effect in the aspect of oil reservoir engineering can be considered; and specific resistance measured through an experiment is input into post-processing software based on an Archie formula to obtain the oil saturation of each monitoring point, then the oil saturation is substituted to calculate to a Tall index value as an index for evaluating the equilibrium displacement degree of different displacement schemes, and the smaller the Tall index is, the more equilibrium the displacement is.

Description

technical field [0001] The invention relates to a polymer flooding balanced displacement front monitoring experiment evaluation device and method, and belongs to the technical field of chemical flooding enhanced oil recovery. Background technique [0002] In order to improve the oil displacement effect of polymer flooding in heterogeneous offshore reservoirs, the balanced displacement of polymer flooding is to comprehensively use reservoir engineering and seepage mechanics methods to improve the effect of polymer flooding, generally through the adjustment of well pattern, well type and chemical injection method The degree of displacement equilibrium can be improved, but there is currently no ready-made index to evaluate the degree of polymer equilibrium displacement. Due to polymer diffusion and dispersion, the polymer flooding front of the visualization model is blurred, making real-time monitoring of the front very difficult; therefore, real-time reflection of the oil satu...

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Problems solved by technology

[0002] In order to improve the oil displacement effect of polymer flooding in heterogeneous offshore reservoirs, the balanced displacement of polymer flooding is to comprehensively use reservoir engineering and seepage mechanics methods to improve the effect of polymer flooding, generally through the adjustment of well pattern, well type and chemical injection method It can improve the degree of displacement equilibrium, but there is no ready-made index to evaluate the degree of polymer equilibrium displacement

Due to polymer diffusion and dispersion, the polymer flooding front of the visualization model is blurred, making real-time monitoring of the front very difficult; therefore, real-time reflection of the oil saturation profile and displacement front dynamics during the polymer flooding process It is of great significance to the sustainable and efficient development of polymer flooding, and it is urgent to propose a polymer flooding equilibrium flooding front monitoring experimental evaluation method and experimental equipment

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