High-resolution Images and Formation Evaluation in Slim Holes from a New Logging-While-Drilling Azimuthal Laterolog Device (2010)

High-resolution Images and Formation Evaluation in Slim Holes from a New Logging-While-Drilling Azimuthal Laterolog Device M.. Allouche; M.. Allouche Schlumberger Search for other works by this author on: This Site Google Scholar S.. Chow; S.. Chow Schlumberger Search for other works by this author on: This Site Google Scholar I.. Dubourg; I.. Dubourg Schlumberger Search for other works by this author on: This Site Google Scholar L.. Ortenzi; L.. Ortenzi Schlumberger Search for other works by this author on: This Site Google Scholar R.. van Os R.. van Os Schlumberger Search for other works by this author on: This Site Google Scholar Paper presented at the SPE EUROPEC/EAGE Annual Conference and Exhibition, Barcelona, Spain, June 2010. Paper Number: SPE-131513-MS https://doi.org/10.2118/131513-MS Published: June 14 2010 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Get Permissions Search Site Citation Allouche, M.. , Chow, S.. , Dubourg, I.. , Ortenzi, L.. , and R.. van Os. "High-resolution Images and Formation Evaluation in Slim Holes from a New Logging-While-Drilling Azimuthal Laterolog Device." Paper presented at the SPE EUROPEC/EAGE Annual Conference and Exhibition, Barcelona, Spain, June 2010. doi: https://doi.org/10.2118/131513-MS Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll ProceedingsSociety of Petroleum Engineers (SPE)SPE Europec featured at EAGE Conference and Exhibition Search Advanced Search Abstract A new logging while drilling (LWD) device acquires laterolog resistivity logs and borehole images in 6-in. holes drilled with con-ductive mud. On a single drill collar, the tool combines a standard laterolog azimuthal measurement with a new, high-resolution imaging capability. The tool uses monitored button electrodes and toroidal antennas to produce focused laterolog resistivity measurements with azimuthal sensitivity, made at multiple depths of investigation. A new measurement configuration within the button electrodes gives downhole mud resistivity. The toroidal antennas provide bit resistivity and azimuthally averaged focused laterolog measurements at multiple depths of investigation.The orientation system in the tool uses the earth's magnetic field as a reference to determine the azimuthal tool position as it rotates. Together with the multi-depth sensitivities of the measurements, this allows structural and borehole invasion profile analysis. The four laterolog images can be compressed and transmitted uphole in real-time for well placement and for wellbore-stability applications.The high-resolution imager is an array of button electrodes on a removable sleeve. The resulting formation image combines the high resolution of wireline imager with the full borehole coverage of an LWD device. A dedicated data compression algorithm allows real-time transmission of this image with moderate resolution losses, enabling applications such as fracture detection while drilling. This paper describes the tool's main features and performances in the initial field tests. Keywords: resolution image, antenna, drilling measurement, logging while drilling, transmitter, high resolution image, investigation, drilling data acquisition, resistivity measurement, formation resistivity Subjects: Drilling Measurement, Data Acquisition and Automation, Formation Evaluation & Management, Logging while drilling, Open hole/cased hole log analysis Copyright 2010, Society of Petroleum Engineers You can access this article if you purchase or spend a download.