FIELD: physics.
SUBSTANCE: in the disclosed methods, accurate formation information is provided regardless of formation and borehole geometry, including information associated with high angle and horizontal wells. According to embodiments, in providing processing of logging or image data, such as may be provided by a density tool or other tool, formation parameters or features (e.g., density and dip angle) are estimated using raw data provided by the tool. Said estimations may then be iteratively refined using effective volume of investigation information. According to embodiments, depth boundaries of formation information provided by the tool are shifted as a function of azimuth for correct spatial positioning of formation features using effective volume of investigation information. Processing of formation parameter or feature data provided by embodiments may be used with respect to various tool configurations, including configurations with and without borehole standoff.
EFFECT: estimating formation depth boundary based on logging data which provide formation parameter data for a plurality of azimuthal angles, wherein said formation depth boundary is estimated for each of said azimuthal angles.
25 cl, 10 dwg
