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Challenge: Analyze complex reservoir properties to detect and estimate carbonate producibility in a challenging offshore well
Solution: Use proVISION Plus magnetic resonance-while-drilling service, EcoScope multifunction logging-while-drilling service, and StethoScope formation pressure-while-drilling service
Results: Acquired high-quality reservoir data in real time that were used to perform a textural analysis, complement an LWD analysis, and estimate reservoir producibility
Complex carbonate reservoirs present unique challenges for measuring porosity, deriving permeability, and assessing producibility. While drilling a complex carbonate reservoir offshore Brazil, an operator required an LWD analysis to identify producible zones.
The operator used proVISION Plus magnetic resonance (MR) service to obtain real-time LWD measurements in a challenging trajectory. The proVISION Plus measurements evaluate pore-size distribution to estimate formation properties used for determining whether the reservoir requires testing, perforation, or acid stimulation. The MR-while-drilling service was also deployed in conjunction with the EcoScope LWD service to evaluate rock and fluid properties and obtain accurate lithology-independent porosity and continuous permeability.
The high-quality, real-time MR data provided a comprehensive description of the carbonate reservoir rocks based on hydrocarbon detection to optimize placement of the wellbore. The combination of services improved testing and completion designs for this offshore application.
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