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When production of a reservoir , there are many situations must consider all three phases - oil, gas and water flow . Water flooding , steam flooding , underground combustion , solution gas drive and gas top drive often contain all three at the same flow. The use of light hydrocarbon gas flooding and EOR technology are often accompanied by the three-phase flow. In order to understand the flow of fluid , you need to evaluate the three-phase relative permeabilities . However, the three-phase relative permeability measurements facing great difficulty . In addition to measure saturation , pressure drop, flow rate of three-phase flow , as well as unlimited different saturation process . This is because any phase displacement consists of two separate changing fluid saturation . Therefore, the majority of three-phase flow containing reservoir engineering calculation procedure is based on predictive models that attempt to more easily obtained from the two-phase oil-water , oil and gas water relative permeability measurements to evaluate the three-phase relative permeabilities . In this paper, wet core and oil-wet core , determination of the different permeability and wettability under different two-phase and three-phase relative permeability, relative permeability of the reservoir seepage law to do further research . First, the effects of different factors of two -phase gas-water , oil , gas oil seepage law , the experimental results showed that: the law of wettability on seepage have a strong impact, and permeability less impact on the seepage law . Secondly, the study under different wetting phase oil relative permeability , the experimental results showed that: wet and oil-wet core core oil relative permeability is dependent saturation of all phases ; wet core permeability oil equivalent rate line concave to the vertices in the oil , oil-wet core permeability of oil equivalent in the oil line convex toward the apex . Finally, choose several different prediction models evaluated , the results showed that: medium strong influence on the wettability of the oil phase relative permeability of the accuracy of the model ; without a three phase model can perfectly fit the experimental data , some models suitable for wet media , some models suitable for oil-wet media.
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