Variation of Measured CPTu Data of Brazilian Marine Soil

Resumo

Soil profiling and estimation of soil parameters (e.g. undrained shear strength) are essential to the
design of oil wells. Piezocone Penetration Test (CPTu) is one of the most used tests to characterize geomechanical
behavior. Uncertanties regarding CPTu data reflects in transformation models for undrained strength evaluation.
Present work assess variability of cone tip resistance and total vertical stress data obtained from CPTu tests in
brazillian geological basins and its effect in undrained shear strength transformation model. DNV’s recommended
practice C207 assess undrained strength characteristc values that are used in conductor casing design, which plays
an important role in structural integrity and safety of well operations serving as foundation element, supporting
all construction and operation phases. Results shows low levels of uncertanties and good overall repeatability, an
indicator of good quality of data.