Multilayer Mapping-While-Drilling Service Increases Reservoir Characterization Efficiency | Schlumberger
Case Study
Location
Asia
Details

In a thin reservoir that has been widely exploited to improve reservoir recovery, an operator used PeriScope Edge multilayer mapping-while-drilling service to optimize reservoir exposure in a good porosity zone. The service provided a better understanding of the challenging formation and mapped an additional two reservoirs.

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Multilayer Mapping-While-Drilling Service Increases Reservoir Characterization Efficiency

PeriScope Edge service improves understanding in challenging formation

Geosteer the well and unveil formation characterization

The operator wanted to improve reservoir recovery and geosteer the well within 3–4 ft below anhydrite while unveiling the reservoir architecture and formation characterization.

Fine-tune structure and formation resistivity interpretation

PeriScope Edge service integrates field geological knowledge by providing wellbore-centric LWD data and ultrahigh-definition bed boundary mapping that extends electromagnetic measurements and enables better fine-tuning of the structure and formation resistivity interpretation around the wellbore, independent of mud type. A new resistivity inversion capability computes geometrically corrected vertical and horizontal resistivity (Rh and Rv, respectively) from bed boundary locations and formation relative dip. In addition, formation-relative dips and boundary positions from the inversion closely match relative dips from other sources such as an image analysis.

Increase efficiency of reservoir characterization

The operator used PeriScope Edge service to enable optimal reservoir exposure in a good-porosity zone. The technology mapped another two thin reservoirs within 20 ft of the depth of investigation. The qualitative formation resistivity of Rh and Rv were used for formation evaluation, adding robust information in the high-angle and horizontal wells because of complicated tool responses when crossing boundaries. Deep directional EM tools were beneficial for inversions to derive formation properties by providing measurements and information about the formation resistivity without the need to cross layer boundaries. Data validation compared the Rh and Rv values with the vertical well resistivity. The service enabled solving formation parameters and reviewing model scenarios to find the best match for the 2-MHz 28- and 16-in coaxial propagation responses using a two-layer model. Initial run results demonstrated improved efficiency in reservoir characterization and interpretation.

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PeriScope Edge service provides wellbore-centric LWD data and ultrahigh-definition bed boundary mapping, enabling better formation resistivity interpretation.
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