Drilling in high-pressure zones with rugged terrain requires unique tools that offer creative solutions. Drilling in vertical-slanted wells always comes with challenges related to drilling risk and geological uncertainties. A recent well drilled vertically penetrated a high resistivity reservoir. The well objective was to stop at 20-ft MD before entering the high-pressure formation. The operator expected some degree of uncertainty related to formation top and resistivity properties.

Based on this expectation, the operator initiated a feasibility study analysis to better understand the measurement sensitivity of the electromagnetic technology before undertaking the drilling project. Modeling based on MD was generated as well as a formation model. This helped the operator better understand the drilling dynamic and tool responses relative to each reservoir property.