Magnetic Resonance LWD Service Evaluates Carbonates Offshore Brazil

Evaluating heterogeneous carbonates

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.

Describing pore-size distribution in real time

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.

Gaining a complete understanding of the reservoir

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.