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《Progress in Geophysics》 2013-02
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The effects of the pore throat roughness on the water-oil flow in rock reservoirs

CHEN Ping1,TAO Guo1,DONG Ming-zhe2,3,SUN Hua-feng1(1.State Key Laboratary of Petroleum Resource and Prospecting,China University of Petroleum,Beijing 102249,China; 2.College of Petroleum Engineering,China University of Petroleum,Qingdao 266580,China; 3.Chemical and Petroleum Engineering,University of Calgary,Calgary,T2N1N4,Canada)  
As one of the important factors to affect the oil-water flow,it is requisite to study the influence of the pore throat roughness on flow behaviors.In this paper the Lattice Boltzmann method is employed to model the water displacing oil in the flat and the rough pore throat models.The comparisons of the water saturation and water-oil relative permeability in different models show that: 1) both in the flat and the rough pore throat models,the roughness would retard the oil and water flow in the process of water displacing oil no matter the pore throat wall is water-wet or oil-wet;2) some oil are trapped in the grooves between the rough elements and the maximal displacing efficiency is under 100% in the case of water displacing oil;3)the displacing efficiency in the water-wet models is higher than that in the oil-wet pore throat models,and there are higher water saturation,water and oil relative permeability in the water-wet models;4)the roughness has a more apparent effects in water-wet models than in the oil-wet models;5)once the wall roughness reaches a level,it effects on flow behaviors are not increased with the growing roughness any more in the oil-wet pore throat models.
【Fund】: 测井前沿技术与应用基础研究项目(2011A-3902);; 国家建设高水平大学公派研究生项目(2009644010)联合资助
【CateGory Index】: P618.13
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