Representation method for water displacing effectiveness mode improvement by nano-micron particle dispersion system
A technology of nano-micron particles and dispersed systems, which can be used in instruments, climate change adaptation, data processing applications, etc., and can solve problems such as no characterization
Active Publication Date: 2018-03-23
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
However, in view of the two-phase seepage characteristics of the nano-micron particle dispersion system, there is no characterization method for characterizing the nano-micron particle dispersion system to improve the effective mode of water flooding and an empirical formula for predicting the degree of enhanced oil recovery.
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[0028] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0029] The invention provides a characterization method for improving the effective mode of water flooding by nano-micron particle dispersion system. Based on the indoor core experiment of a low-permeability oil reservoir in China, the characterization method for improving the effective mode of water flooding by nano-micron particle dispersion system is summarized. This method can Quantitative characterization of various parameters in the stage of improving water flooding by nano-micron particle dispersion system is of great significance for actual field development and recovery prediction.
[0030] The specific implementation is as follows:
[0031] (1) Nanoparticle dispersion system / oil two-phase seepage characteristics experiment
[0032] experimenta...
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The invention provides a representation method for water displacing effectiveness mode improvement by a nano-micron particle dispersion system, and belongs to the technical field of petroleum exploitation. According to the method, research on oil displacing two-phase seepage flow characteristics of the nano-micron particle dispersion system is carried out, the displacing process is divided into two effectiveness modes according to the two-phase seepage flow characteristics under different permeability rock-core conditions, a least square method is used to solve a coefficient in a relational expression, an empirical formula which can represent the two effectiveness modes quantitatively is obtained, and according to an indoor recovery efficiency improving experiment of the nano-micron particle dispersion system, an experimental result of influence of the concentration of the nano-micron particle dispersion system and the size of an injection segment plug on the recovery efficiency is obtained and represented quantitatively, and a recovery efficiency improving empirical formula in the water displacing stage of the nano-micron particle dispersion system is obtained. A prediction modelcan be applied to long-term and annular plans for improving water displacement of the nano-micron particle dispersion system, as well as to evaluating effects of adjusting measures of water displacement improvement of the nano-micron particle dispersion system.
Description
technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a characterization method for improving the effective mode of water flooding by a dispersion system of nanoparticles and micrometers. Background technique [0002] Nanoparticle dispersion system to improve water flooding technology is a new and potential deep water flooding technology that has developed rapidly in recent years. Aiming at the low-permeability reservoir rock throat diameter is micron level, it is prepared by polymerizing nano-micron particle monomers, cross-linking agents, initiators and active agents through the synthesis method of nano-micron materials, and the throat diameter matching is prepared. Nanoparticle dispersion system. Its control and displacement mechanism is that after the nano-micro particle dispersion system enters the oil layer with the injected water, it can move freely in the porous medium, accumulate at the throat to generate pl...
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IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06Y02A10/40
Inventor 朱维耀刘昀枫宋智勇韩宏彦岳明张晓静
Owner UNIV OF SCI & TECH BEIJING