Research On Test Method Of Interwell Tracer Test

As a result of the formation heterogeneous and difficulty in cognition, the distribution of subterranean oil and water turns complicated, and the difficulty of tapping the latent power increases in the production tail. It is the main current approach to evaluate the formation heterogeneous and the distribution of subterranean oil and water through the interwell tracer interpretation, but there are limits of the regular tracer interpretation, the accuracy of boundary monument methods depends on artificial reconnaissance which leads to errors. And the numerical simulation method depends on history matching which it is difficult to adjust the scope.In this paper, further research on interwell tracer interpretation and numerical simulation methods has been done, and the achievement is listed as below:(1) A new and more integrated multi tracer component and multiphase flow infiltrating fluid mathematical model is established, which is based on tracer influent mechanization and the affects of detergency, counter flow and adherence.(2) A new mathematical model for interwell tracer material balance method is established, which is based on interwell mechanization to get the analysis formula of interwell exosphere heterogeneous and mean irreducible oil saturation,geting rid of the limits of the boundary monument methods.(3) A new artificial accelerated optimizing history matching method based on interwell tracer numeral interpretation is established, which takes consider of the shift time, the stratum parameters, and the sensibility between stratum parameters and fly time, divergence bound term, harshness bound term, stratum parameters bound term. And it’s convenient to make artificial adjustments to achieve the purpose of accelerating the optimizing to get rid of the limits of the history matching methods.(4) A program about mass balance interpretation method, numeral interpretation and artificial accelerated optimizing is compiled, and operates smoothly.(5)The mass balance interpretation method has been tested and verified, and as the results suggest that error between observed value and calculated value is less-than 6%, the mass balance interpretation method is demonstrated to be reliable.(6)The interwell tracer numeral optimizing interpretation method has been tested and verified, and as the result shows that the tracer consistency curve fits the observed value well, the fitting data of permeability and the mean irreducible oil saturation distribution fits the observed data well. The interwell tracer numeral optimizing interpretation method is demonstrated to be reliable.