Schlumberger

Rt Scanner Triaxial Induction Service

Measuring both vertical and horizontal resistivity at any dip and well deviation overcomes the low-resistivity bias in laminated, anisotropic reservoirs

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. Measuring at multiple depths of investigation in three dimensions ensures that the derived resistivities are true 3D measurements that are unbiased by the low-resistivity effects of heterogeneous formations. The resulting estimated hydrocarbon and water saturations accurately represent the actual fluid contents, especially for laminated, anisotropic, or faulted formations.

Going beyond the conventional measurement of horizontal resistivity

Compact, one-piece Rt Scanner service has six triaxial arrays, each containing three collocated 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 and to account for the geometry of formation layers.

Delivering complete resistivity information from one tool

Along with advanced resistivity and structural information, Rt Scanner service delivers industry-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. Rt Scanner service is also fully combinable with the Platform Express integrated wireline logging tool and most openhole services.

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Vertical Fracture Detection Diagnoses Extreme Mud Losses

Log shows the extent of the fractured loss zone and the orientation of the fractures.
Extensive petal fracturing that was probably drilling induced was identified by innovative processing of data from Rt Scanner service to guide the USD 7.8 million bypass to avoid the loss zone. Read case study

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Rt Scanner Triaxial Induction Service
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