Extradeep-Resistivity Application in Brazil Geosteering Operations Enables Successful Well Landing
- Richard Michael Tilsley-Baker (Home) | Yuriy Antonov (Baker Hughes) | Sergey Martakov (Baker Hughes) | Hans-Martin Maurer (Baker Hughes) | Anton Mosin (Baker Hughes) | Mikhail Vladimirovich Sviridov (Baker Hughes) | Katharine Sandler Klein (Statoil Brasil) | Marianne Iversen (Statoil) | Jose Eustaquio Barbosa (Statoil Brasil) | Gabriel Carneiro (Statoil Brasil)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- January 2016
- Document Type
- Journal Paper
- 108 - 117
- 2016.Society of Petroleum Engineers
- Geosteering, Landing, Inversion, Resistivity
- 4 in the last 30 days
- 272 since 2007
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The relatively recent development of azimuthal-resistivity measurements enables proactive geosteering within complex reservoirs. The tools enable determining the distance (up to 5m in ideal conditions) and the azimuthal direction to a resistivity boundary. In ideal conditions, the well is inside a high-resistivity layer and the shoulder bed is low resistivity, giving geologists warning of approaching adjacent conductive beds. When the tool is in a low-resistivity layer, the depth of detection of an adjacent high-resistivity layer is much smaller. In these situations, it is often not possible to use the tool for effective geosteering. An extradeep-resistivity tool has been used for several years in Norway and has been introduced in the Peregrino Field in Brazil. It operates at lower frequencies than the shallower reading tools, has large transmitter/receiver spacings, and a depth of detection up to 25 m. This tool was deployed in addition to the conventional directional-resistivity instrument. The new application in Brazil was supported by inversion software (still in development) to enable possible interpretation of the geology within the tool range. The inversion results provide information that can help identify adjacent reservoir layers while in the target zone and measure the thickness of the reservoir layer being drilled. Examples are presented from one well where the extradeep resistivity provided early warnings and additional information that helped to steer the well successfully and maximize reservoir coverage. The extradeep measurements from the tool also provide valuable reservoir understanding and knowledge for future well-planning purposes.
|File Size||1 MB||Number of Pages||10|
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