All Days 2005
DOI: 10.2118/94378-ms
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Accurate Wellbore Placement Using a Novel Extra Deep Resistivity Service

Abstract: The Grane field causes significant challenges with respect to reservoir drainage and wellbore placement. The true resistivity profiles from offset wells are reflecting an irregular oil water transition zone in the field, likely to be caused by subtle facies variations and/or local variations in the oil water contact (OWC). In addition, horizontal wells penetrated many shales.Baker Hughes INTEQ has in collaboration with Hydro developed an extra deep resistivity service called DeepTrak™ to navigate at a distance… Show more

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Cited by 14 publications
(3 citation statements)
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“…Parameter uncertainty is computed for the model reconstructed by inversion and the specific tool configuration. It depends on the noise model assumed, quality of data fit, and sensitivity of tool measurements to the parameter(s) of interest (Nardi et al 2010;Rabinovich et al 2012). The software also enables predrilling analysis of the tool's capabilities in realistic scenarios and also allows real-time inversion results to be evaluated and quality controlled to ensure that, for example, the depth of detection is not overestimated for a specific resistivity environment.…”
Section: Inversion Softwarementioning
confidence: 99%
See 1 more Smart Citation
“…Parameter uncertainty is computed for the model reconstructed by inversion and the specific tool configuration. It depends on the noise model assumed, quality of data fit, and sensitivity of tool measurements to the parameter(s) of interest (Nardi et al 2010;Rabinovich et al 2012). The software also enables predrilling analysis of the tool's capabilities in realistic scenarios and also allows real-time inversion results to be evaluated and quality controlled to ensure that, for example, the depth of detection is not overestimated for a specific resistivity environment.…”
Section: Inversion Softwarementioning
confidence: 99%
“…sections by use of extradeep-resistivity tools. The tools have been used for a number of years, primarily on Grane Field in Norway (Helgesen et al 2005), to maintain well position approximately 9 m from an oil/water contact. The extradeep-resistivity measurements are made at frequencies of 20 and 50 kHz by use of a simple three-antenna arrangement in two subs, one containing the transmitter and the other containing two receivers.…”
Section: Introductionmentioning
confidence: 99%
“…Shale formations are not flat, but have localized dip changes (Helgesen et al, 2005;Muritala et al, 2000). Real-time borehole images (density, resistivity, gamma ray, photoelectric factor) provide an eloquent solution to steering direction uncertainty.…”
Section: Well Placement With Enough Measurements To Determine Local Smentioning
confidence: 99%