New services are providing operators with advanced knowledge of untapped reservoirs during exploration and de-risking fluid analysis and sampling in highly deviated development wells.
Following its recent OTC Asia Spotlight on Technology Award win, Schlumberger will be showcasing the SpectraSphere fluid mapping-while-drilling service at OTC 2018 in Houston. The new service enables ‘productivity drilling’ by maximizing reservoir contact—hence maximizing reservoir production potential while drilling. This creates new possibilities in well placement and reservoir characterization, while reducing costs.
The SpectraSphere service enhances well placement and reservoir understanding, by enabling early time detection of potential reservoir complexities, such as lack of horizontal or vertical connectivity. The technology is the first in the industry to deliver downhole fluid composition in real time while drilling. The service also detects untapped reservoirs during exploration, appraisal, and development, while mitigating risk during fluid analysis and sampling in highly deviated, horizontal, and extended-reach drilling (ERD) wells. In addition, the technology provides precise formation pressure measurements, performs downhole fluid analysis, and acquires high-quality samples while drilling.
The SpectraSphere service consists of three modules. First, a pretest module that performs precise formation pressure-while-drilling measurements, including time-optimized and pumps-off pretesting. Second, a fluid mapping module comprised of two downhole fluid analyzers for real time, while-drilling reservoir fluid contamination estimation, compositional analysis, and in situ gas-oil ratio, formation volume factor and asphaltene content measurements. The third module is the sample carrier module (SCM) for collecting high-quality formation fluid samples. Up to four SCMs may be combined in a single BHA, enabling collection of up to 12 samples in a single run.