This paper presents techniques used to determine in-situ stress orientation and magnitude in the Marlin and Albacora offshore fields located in the Campos Basin. These data were collected from anelastic strain recovery (ASR) tests, a low-frequency dipole tool, and a downhole extensometer that provides a new means of analyzing in-situ stress directions and rock properties.

The paper also describes general prejob planning for drilling ship operators performing a microfracturing stress test in deep-water wells. Discussion includes equipment configuration and layout, string configuration, and fluid used to create and propagate the required hydraulic fractures. The possible causes of success or failure for each running session are also discussed.

Keywords:
multiple technique, marlin, in-situ stress direction, microfrac stress test, stress direction, extensometer, closure pressure, well logging, displacement, anelastic strain recovery
Subjects:
Wellbore Design, Drilling Operations, Hydraulic Fracturing, Well & Reservoir Surveillance and Monitoring, Reservoir Characterization, Formation Evaluation & Management, Reservoir geomechanics, Open hole/cased hole log analysis
Copyright 1994, Society of Petroleum Engineers
You can access this article if you purchase or spend a download.