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Abstract

Within the frame of a 2 year contract with the C.E.C., the B.R.G.M. has been involved in a research on the detection of fracturation from boreholes by geophysical methods. Various geometrical arrays (monohole, crosshole, hole to hole surface) concerning mainly electrical methods, have been used in the field of organic rocks, and interpreted according to three-dimensional earth models. Conductive or resistive parallelepipedic inhomogeneities embedded in stratified or homogeneous half spaces, have been taken into account in this three-dimensional modeling. The influence of the various geometrical and electrical parameters of the inhomogeneities for different electrical arrays have been studied. Advantages and drawbacks of these arrays for the detection of the fracturation from boreholes, can be thus derived. An analysis of the calculation and drawing routines gives way to possible future improvements, especially for modeling.

Additional information

Authors: LE MASNE D BUREAU DE RECHERCHES GEOLOGIQUES ET MINIERES, ORLEANS (FRANCE), BUREAU DE RECHERCHES GEOLOGIQUES ET MINIERES, ORLEANS (FRANCE)
Bibliographic Reference: EUR 10198 FR (1985), MF, 79 P., BFR 150, BLOW-UP COPY BFR 395, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
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