... sensitivity invasion effect Symposium forward solver spwla 58 invasion conductive invasion well logging Invasion Diameter induction tool interpretation resistivity anisotropy SPWLA 58th Annual Logging Symposium, June 17-21, 2017 DETERMINING ANISOTROPIC RESISTIVITY IN THE PRESENCE OF INVASION...

... software to address problems other than determining water saturation. In the first example high skin values observed during well tests were thought to indicate formation damage. A new technique for determining invasion diameter from differences between conductivity signals has been shown to be simple...

... is entirely characterized as a function of physical parameters, a conjugate-gradient method is employed to minimize the cost function in the inversion. This model permits simultaneous inversion for borehole diameter, invasion diameter, true formation resistivity and invaded zone resistivity. In certain...

... resistivity well logging resolution Invasion Diameter ohmmeter amplitude ratio SPWLA35th AnnualLoggingSymposiumJ,une 19-22,1994 A NEW SLIMHOLE MULTIPLE PROPAGATION RESISTIVITY TOOL W. Hal Meyer, L. W. Thompson, M. M. Wisler, Jian-Qun Wu Baker-Hughes INTEQ ABSTRACT A new slimhole Multiple Propagation...

... cannot provide formation resistivity Rt and invaded zone resistivity Rxo with invasion diameter. In these cases, wireline Array Induction Imager tool (AIT) or induction and focussed resistivity tools provide a late-time invasion diameter and the resistivities Rt and Rxo, The wire-line resistivity...

... computer simulation, to infer from the MWD logs the resistivity of the formation and the invasion profile. investigation depth Invasion Diameter voltage resistivity log log analysis resistivity sensor well logging homogeneous medium phase difference conductivity spwla 32nd resistivity...

... invasion at the time of drilling is found to be less than 3". In one instance the radial invasion is found to be in excess of 5". An additional M. W. D. trip 4 hours after the first log indicates a progression of the invasion. Upstream Oil & Gas Invasion Diameter toroid sonde well logging...

... Intelligence log analyst Invasion Diameter coefficient diameter optimization problem Rxo curve fit log analysis approximation method regression coefficient algorithm pseudo -geometrical factor equation dual laterolog calculator Upstream Oil & Gas true resistivity invasion study Symposium...

... & Gas Laterolog investigation Symposium well logging Invasion Diameter induction tool Spwla Fifteenth resistivity Rxo diameter evaluation induction log reading Formation Resistivity log analysis log reading radial response interpretation chart conductivity pseudo-geometrical factor...

... investigators. The correlations are not oriented for hand calculations, but are readily adapted to a computer logging program gel-base mud Invasion Diameter minimum error log analysis information porosity correction resistivity average absolute deviation Upstream Oil & Gas correlation...

... ABSTRACT A new technique for approximating the invasion diameter of mud filtrate has been developed for use in the analysis of well logs. Application of this technique requires some knowledge of the general mud composition, API filter loss, annual mud velocity, bottom hole temperature...