The hydrocarbon saturation calculated from Rv and resistivity anisotropy clearly indicates the presence of hydrocarbon that otherwise would have been overlooked using classic resistivity measurement of Rh only.
Rt Scanner triaxial induction service calculates vertical and horizontal resistivity (Rv and Rh, respectively) from direct measurements while simultaneously solving for formation dip at any well deviation. Making measurements at multiple depths of investigation in three dimensions ensures that the derived resistivities are true 3D measurements. The enhanced hydrocarbon and water saturation estimates computed from these measurements result in a more accurate reservoir model and reserves estimates, especially for laminated, anisotropic, or faulted formations.
The compact, one-piece Rt Scanner tool has six triaxial arrays, each containing three colocated coils measuring at various depths into the formation. Rv and Rh are calculated at each of the six triaxial spacings. Three single-axis receivers are used to fully characterize the borehole signal to remove it from the triaxial measurements. In addition to the resistivity measurements, formation dip and azimuth are calculated for structural interpretation.
Along with advanced resistivity and structural information, the Rt Scanner tool delivers standard AIT Array Induction Imager Tool measurements for correlation with existing field logs. The tool’s innovative design provides this complete resistivity information with no additional hardware. The Rt Scanner tool is also fully combinable with Platform Express and most openhole services.
