A Fuzzy Method to Evaluate Remaining Oil Potentiality of PI Group

Abstract

The remaining oil distribution and its potential evaluation are the keys to the well network adjustments and comprehensive potential exploration on the later stage production. In view of the vagueness of the influence factors of remaining oil potentiality, a set of quantitative evaluate method about how to suit remaining oil potentiality of heavy oil reservoir at high water-cut stage is established. Six factors are taken into consideration, including oil saturation, reservoir thickness, permeability, porosity, water injection distance and sedimentary facies. First, make sure the evaluate criterion and the influence weight of a single effect factor. And then, use the fuzzy theory to calculate the latent capacity of the block, comprehending many factors. In the end, certain the foundation of remaining oil potentialities according to the value of the latent capacity. Using this method, remaining oil potentiality of the east of Beierxi is calculated at high water cut period. This provides a theoretical guide to formulation and implementation of the in-situ potential measurement.