Physical Simulation Of Oil Displacement With Different Gases Using Slim Tube And Core Samples

For the first time,the results of physical modeling of oil displacement by gas agents with different miscibility levels in a porous media with different geometric characteristics were compared in this work.It was found that for reliable testing of miscible agents,it is necessary to achieve processes of mass exchange between oil and gas fluid,which requires significant path of filtration.It is shown that the core models of the reservoir(according to Sate Standard #39-195-86)cannot simulate the displacement of oil by miscible agents and,the higher the degree ofmiscibility(deeper mass transfer)between gas and oil,the worse the core model makes it possible to reveal the oil-displacing characteristics of the fluid.For the full detection of oil-displacing characteristics of miscible fluids it is necessary to use bulk models of a considerable length of the formation(slim tube).It is shown,on the example of a typical West Siberian deposit,that core models of the formation,while usingmiscible fluids,allow reliably identify possible complications in their application for oil production(for example,because of the colmatation of the porous medium,etc.).The results of the project allow increasing the level of laboratory testing of miscible fluids for oil production.Shown,that the most complete and reliable information on the application of the miscible agents can be obtained by using the slim tube(estimation of miscibility level of oil and agent)and linear core samples(estimation of filtration properties of fluids)at the same time.