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The Use of Real-time Microlmager Data to Validate Structural UncertaintiesNormal access

Authors: C. Ozol, E. Climer, R. Aiello, D. Di Tommaso, M. Borghi, N. Cominesi and M. Medaglia
Event name: 77th EAGE Conference and Exhibition 2015
Session: Petrophysics II
Publication date: 01 June 2015
DOI: 10.3997/2214-4609.201412647
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 3.72Mb )
Price: € 20

Summary:
Accurate measurements of bedding dip while drilling can be a valuable tool for minimizing the effects of structural uncertainly on the drilling and well placement process. However, the quality of the real-time image is crucial to deriving correct formation dip values; this is particularly important in thinly bedded formations, where low-resolution images resulting from poor real-time data density can actually lead to erroneous formation dip interpretation. Although microimagers provide high resolution images of the wellbore, the real-time image resolution relies heavily on the data density that can be achieved with mud pulse transmission rates and rate of penetration. This is particularly relevant in formations which have very thin or interbedded layers. During a two well project, it was noticed the real-time formation dip interpretations differed significantly from the recorded dips on the first well. Through the utilization of modeling techniques, parameter optimization, client coordination, and fast data transmission rates, the dip variations between real-time and recorded images were eliminated allowing proper formation dip interpretation in real-time and minimizing any structural uncertainties.


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