Jackson, P. D.; Harvey, P. K.; Lovell, M. A.; Gunn, D. A.; Williams, C. G.; Flint, R. C. (1998): Measurement scale and formation heterogeneity; effects on the integration of resistivity data. Geological Society of London, London, United Kingdom, In: Harvey, P. K. (editor), Lovell, M. A. (editor), Core-log integration, 136, 261-272, georefid:1999-021029
Abstract:
Core and downhole logging resistivity data gathered during Leg 133 of the Ocean Drilling Program are used to illustrate the wide range of scales of resistivity data available for reservoir characterization. The differences in scale and sampling interval between quantitative log resistivity data and conventional core plug data is shown to be central to reconciling these two datasets. Resistivity images of fine scale sedimentary structures taken on half-round cores are presented (at the same resolution as the downhole borehole wall imaging tools) and these fine structures are shown to be "lost" if investigated using conventional core plugs and downhole resistivity logging tools. The limitations of conventional measurements on core plugs are presented and contrasted with the benefits of logging all of the core in the laboratory at a resolution comparable to the borehole wall imaging tools. An example of integrating different scales of resistivity data using a modelling approach is presented and is shown to be applicable to both core and log data. Visualizing and comparing the scale content of different resistivity datasets has been achieved in an intuitive way using a spectral method which illustrates the "data gap" in quantitative resistivities which exists between core and log data.
Coverage:
West: 145.0000 East: 150.0000 North: -15.0000 South: -20.0000
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