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Modeling tracer flow characteristics in Different Types of Pores: Visualization and Mathematical Modeling

Computer Modeling in Engineering & Sciences 2020年第6期123卷 1205-1222页

作者： Tongjing Liu Weixia Liu Pengxiang Diwu Gaixing Hu TingXu Yuqi Li Zhenjiang You Runwei Qiao Jia Wang State Energy Center for Shale Oil Research and Development Beijing100083China Unconventional Petroleum Research Institute China University of PetroleumBeijing102249China Research Institute of Petroleum Exploration and Development Sinopec Shengli Oilfield CompanyDongying257015China College of Science China University of PetroleumBeijing102249China Oil and Gas Technology Institute PetroChina Changqing Oilfield CompanyXi’an710081China National Engineering Laboratory of Low Permeability Oil&Gas Exploration and Development Xi’an710081China Research Institute of Petroleum Exploration and Development SINOPECBeijing100083China School of Chemical Engineering The University of QueenslandBrisbaneQLD 4072Australia

Structure of porous media and fluid distribution in rocks can significantly affect the transport characteristics during the process of microscale tracer *** clarify the effect of micro heterogeneity on aqueous tracer transport,this paper demonstrates microscopic experiments at pore level and proposes an improved mathematical model for tracer *** visualization results show a faster tracer movement into movable water than it into bound water,and quicker occupancy in flowing pores than in storage pores caused by the difference of tracer ***,the proposed mathematical model includes the effects of bound water and flowing porosity by applying interstitial flow velocity *** new model also distinguishes flowing and storage pores,accounting for different tracer transport mechanisms(dispersion,diffusion and adsorption)in different types of *** resulting analytical solution better matches with tracer production data than the standard *** residual sum of squares(RSS)from the new model is 0.0005,which is 100 times smaller than the RSS from the standard *** sensitivity analysis indicates that the dispersion coefficient and flowing porosity shows a negative correlation with the tracer breakthrough time and the increasing slope,whereas the superficial velocity and bound water saturation show a positive correlation.

关键词： tracer flow characteristics different types of pores interstitial flow velocity visualization and mathematical modeling tracer concentration prediction model

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