| 摘要 |
<p>A technique for processing well logs performs a nonlinear resolution enhancement of raw well logs using a modified Van Cittert nonlinear enhancement technique that avoids instabilities, and can provide resolution matched results at a predetermined resolution. The method involves (a) selecting a resolution, (b) estimating a formation profile 210, (c) calculating a nonlinear forward modelling operator for the logging tool, (d) calculating an enhancement factor from the logging data, the formation profile estimate and the forward modelling operator, (e) calculating a resolution matched stability factor, (f) updating previous nonlinearly enhanced logging data with the enhancement factor and the resolution matched stability factor to produce nonlinearly enhanced data 230, and (g) iteratively repeating (a)-(f) until a predetermined criterion is satisfied. The method can be used with induction logging tools, or acoustic and nuclear well logging tools.</p> |
