The Research For The Extracting Of Characters Of The Components Of Constituent Porous Medium And Applications

This paper deeply studies the forward and inversion problems of homogeneous isotropic elastic fluid porous media (i.e., the linear media), which is mainly based on the media-model of components fluid porous media proposed independently by my mentor, Professor Binhua Niu. Firstly, using the data of water-bearing and gas sandstone measured by Lawrence Livermore National Laboratory of U.S., we calculate theoretical data based on the component equations. The correlation coefficients of the theoretical data and the measured data are all over 90% which indicates the reasonableness of the component model and its component equations. Secondly, proposes four linear inversion methods based on the component equations, in which clearly points the calculating method for the porosity of the transition point, which is the one of the innovations of the theory put forward by Professor Niu. In my paper I have done the inversion calculation for the measured data. The relative errors of measured values and inversion values are less than 10%, which show that the theory is reasonable and valid. Then, I have done the density inversion of the actual logging data and the results are reasonable. Last, I studied the changes of elastic characters of three-phase component medium with the saturation of fluid.Combining the help of mentor with the previous achievement, the results of this paper are as follows:1、Studies on numerical calculation method of elastic parameters of two-phase component porous fluid medium. Combining with the measured data I calculated theoretical data based on the component equations and compared them with the measured data, which is result in the rationality of media-model of components fluid porous media.2、In the paper, we deducted three linear inversion formulas based on the component equations of density, bulk and shear modulus. And proposed four linear inversion methods in which it contained the accurate method for calculating the porosity of the transfer point. Using the measured data, we did the inversion calculation and the relative error of measured and invert data were all less than 10% which indicated the feasibility of the four inversion methods.3、Based on the verification of the measured data in the lab, we also inverted theactually measured data in the field and the inversion results were satisfied withthe actual situation.4、In this paper, I have built the three-phase component model and studied thechanges of elastic characters of three-phase component medium with thesaturation of fluid.