All-Factor Average Method of Reserve Parameters with Crude Oil Volume and Mass Constraints

In order to make the average value of each reserve parameter a set oil reserves more representative, this paper puts forward all-factor method parameters with crude volume and mass constraints. first step, two constraint methods are adopted calculate various total items. The weight coefficient when is averaged is, respectively, partial derivative or calculation formula respect parameter. Compared original results, their all show shift towards values significant share reserves, especially effective porosity, saturation, factor. considers comprehensive factors than method. Therefore, new should also be much representative. Since current specification stipulates that needs retain certain number decimal places, there inevitably some carry error between results calculated by items accumulated unit. second step select optimal using full permutation combination selection reduce error. A minimizes sum squared relative errors selected method, which can effectively