Geological Services

• Core recovery supervision
• Correct labeling of core boxes or core tubes (for sleeved core)
• Spot core description based on core plugs/tube end samples (lithological descriptions, core logs based on core plugs or core observation, facies identification)

Our geologists are in constant communication with directional drillers regarding wellbore placement and optimal drill path in accordance to field sample data, making sure the wellbore is following the pay zone.

Our team plots the actual well path against the designed well trajectory, identify the wellpath relative to stratigraphic markers (wellpath with TVD gamma and formation tops) and perform MWD/LWD data stream monitoring.

As part of our wellsite supervision and geosteering package, we can provide your well with a technical supervisor for gas analysis. This service includes a comprehensive report which includes:

• QC of gas data from a gas chromatograph
• Integrated gas ratio log
• Gas concentration analysis
• Fluid analysis
• Gas ratios plots and cross-plots
• Production and GOR evaluation
• Zoning evaluation
• Organic matter and source rock identification
• Biodegradation

Our logs use consistent, easy-to-read-layouts with comprehensive details. Besides petrographic descriptions of drill cuttings, striplogs include curves (geology and drilling curves, chromatography, wireline logging), directional surveys, mud data, bit data, engineering comments, and more.

We also provide the following striplogs dependent on well type:

• Measured depth striplogs for vertical wells
• Measured depth striplogs for deviated wells and build sections (with directional data)
• TVD gamma logs for formation tops correlation on build sections of horizontal wells
• Lateral logs detailing well cross-section and directional well path
• Composite logs including chromatograph curves and ratios
• Composite logs including wireline porosity and induction, or tailored to specific logs (spectral gamma, sonic, etc), core logs (large scale, based on core plugs or core tube ends)

The advances in un-manned chromatographs/spectrographs eliminate the need for a dedicated mudlogger. Our wellsite geologists can rig in, set up, supervise and maintain a modern gas detector, including:

• Lag time calibration and equipment maintenance
• Data collection
• Plotting of chromatography curves into composite logs
• Ratio analyses in real-time
• Geosteering / reservoir navigation aided by gas ratios
• Gas shows logging (gas show tally) and interpretation (liberated gas vs produced gas)
• Supervision of gas detector for abnormally high gas values, setting alarm and alerting rig personnel when safety boundaries are crossed

• Preparation, description and logging of samples (Description of samples includes primary lithology, main constituents, grain size, cementation – type and degree, accessory minerals, porosity type, fluorescence and cut fluorescence)
• Permeability estimation (Sneider/Archie classes)
• Porosity estimation (porosity type, percent estimation)
• Chromatography ratio interpretation (gas, oil, wet, condensate, residual, dry zones)
• Basic interpretation of wireline logs (identification of porous zones, tight stringers, hydrocarbon presence, etc)

Remote geosteering can be an effective alternative to conventional onsite geosteering in mature reservoirs. Rockwell geologists apply their experience in the field combined with effective communication and the latest software to remotely ensure successful drilling of the wells.

• Less personnel onsite means less risk for an accident in the field
• Costs saved in relation to transportation and lodging
• Communication between office and steering personnel
• 27/7 Monitoring and evaluating the drilling process

DST supervision

• Operations supervision and coordination
• Pressure gage curve plotting
• Initial interpretation (formation damage, formation pressures, test efficiency)

• Iso-tubes collection for gas/isotopes identification
• Geo-jars collection for mud sample/wet cuttings sample, free oil/bitumen analysis
• Sidewall coring supervision
• XRD/XRF/FTIR/RockEval sample collection and analysis
• Field analysis: XRF and FTIR

• Coordination of logging program with loggers and oil company
• On site QC of logging process (timing, log quality, tracking lost time)
• Basic interpretation of wireline logs (formation tops, identification of porous zones and gas cross-over, identification of tight stringers)
• Consistent reports detailing logging operations