Determination and application of MWD/LWD and core based perfmeability profiles in oseberg horzontal wells

摘要

Quicker and better quantitative partial perforation strategy has been possible yby applying more accurate predicted permeability profiles along horizontal wells inthe simulation models.A newly devleoped mehtodology for predicting permeability in non-cored horizontal wells that uses measurement/logging-while-drilling (MWD/LWD) data and a multivariate technique makes this possible.Data from the Oseberg Field in the hnorth Sea illustrate the technique.The pemeability modelling is done with a partial-least-Squares (PLS)regression technique.The underlying calibrationmodel is founded on logs and core data from selected wells.Gamma ray,neuron,density,resistivity logs and air permeabilities as measured on core plugs constitute the applied calibration data set in hte present context.In subsequent prediction phases,new logging data are fed into the established model to produce the permeability profile.