OPERATIONS GEOLOGY DIVISION

Upcoming Division Talks

Advantages of Real-Time Methane to Pentane Gas Detection and Gas Ratios Data

Scott Gunn, M/D Totco | NOV Wellbore Technologies

November 14 | 12:00 noon 
geoLOGIC Room (2nd Floor), Aquitaine Tower, 540-5th Avenue S.W., Calgary

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ABSTRACT

Technical advancements in gas detection technology now provides the capability of isolating methane, ethane, propane, isomer & normal butane, and isomer & normal pentane, much quicker and process the data in several gas ratio formulas in real-time while drilling. This data provides many benefits including eliminating missed gas data due to fast ROP, an increase in gas data samples points per time intervals, and real-time hydrocarbon characterization while drilling.  Additional data benefits also include identifying oil and water contact points, the ability to provide real-time gas ratio profiles to assist Geosteering as well as geological and completions engineering teams on frac stage placement. It provides further stable calibration, nondestructive sample collection for Isotube sampling and is economically more efficient compared to Gas Chromatograph (GC) and mud logger options.

Gas detection technology has advanced from the GC to new spectral sensing devices such as the Fourier Transform Infrared Spectrometers.  The FTIR Spectral Analyzer provides a much quicker sampling time and additional sample points per GC sample intervals resulting in more gas data points per GC sample and eliminating missed gas peaks. The gas sample does not physically interact with the FTIR Spectral Analyzer thus ensuring the FTIR Analyzer calibration accuracy will not deteriorate over time and require calibration offset adjustments or complete recalibrations. The continuous flow gas sample through the FTIR Spectral Analyzer is not destroyed in the gas sensing process and can be collected for Isotube sampling to be qualified to FTIR gas data.

Wetness, Balance, Character, and Pixler Ratios are processed in real-time and exported to any Electronic Drilling Recorder (EDR) communicating with the Wellsite Information Transfer Specification (WITS) protocol every second to provide real-time Gas Ratio data to the rigsite and operators geological team. With this data, the Geosteering teams can adjust the direction of the well path to optimize ideal hydrocarbon state to maximize target hydrocarbon pay zone. Post-well evaluation of Gas Ratio Analysis data can assist geological and completions engineering teams in the placement of frac stages to maximize target hydrocarbon production.


BIOGRAPHY
Scott Gunn, Sales Representative for MD Totco Geological Services, is the subject matter expert on the Gas Watch Analyzer. Scott works directly with Geological clients to generate consistent geological gas data that provides solutions to understanding their reservoirs and optimizing their results. Previously, Scott served as an Instrumentation Engineering Technologist in the Canadian Airforce for 10 years before attending SAIT for Instrumentation Technology. Starting as a Gas Detection Field Technician, Scott then was President and founder of Wellsite Gas Detection Inc. and Geological Rentals & Services Inc. both of which sold to National Oilwell Varco. Scott has several gas detection patents in several countries, awarded for new infrared gas detection inventions.

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Division Profile

Division talks are held monthly. They are free of charge. No registration is required, and talks are open to the public. There will be a door prize, light snacks and coffee provided by sponsors. Attendees are welcome to bring their own lunch. 

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Operations Geology is an important sub-discipline of the practice of geology. As it pertains to petroleum geology, we include any geoscientist managing drilling operations from the office/home (including planning wells) and geosteerers. Operations geologists are uniquely involved in the drilling of a well from the initial planning stages to long after TD and the data have been properly distributed to stakeholders and/or lookbacks have been held.

Knowledge of one’s geological targets (conventional, heavy, or unconventional) is more important than it has ever been for well placement optimization, especially considering the introduction of new technology, such as horizontal drilling and multi-stage fracture stimulation. Beyond the typical geological capacity and experience, knowledge of stakeholder management, regulatory process and approvals, well planning, drilling processes, reservoir engineering, petrophysics, production, wellbore analysis technology, etc are also vital to the role of the operations geologist. These disciplines are commonly in conflict during drilling so prioritization and compromise of the well's objectives is also a skill.

Communication is another vital skill set of the Operations Geologist. Not only does the Operations Geologist communicate with their drilling engineer, directional driller, wellsite geologist (if present), and geosteerer (if present), but communication with their subsurface team, logging team, internal and external regulatory groups, as well as other internal and external stakeholders are also critical to drilling success. A common misperception is that Operations Geology is not its own discipline, the above paragraphs prove that while the Operations Geologist is truly a generalist, there are skillsets that are unique to the Operations Geologist beyond taking well calls in the middle of the night.

Topics may include, but are not limited to:
● The role of an Operations Geologist in safety.
● Questions to ask your wellsite geologist to aid in your collective interpretation of well data.
● Reading/interpreting striplogs, cuttings, cuttings technology
● Basic training/discussion of geosteering software
● Critical Regulatory knowledge (ie: D56)
● Best practices: dealing with unforeseen events, stuck pipe, collapsed hole, etc.
● Logging technologies, open hole, mwd, lwd
● Communication with drillers, directional hands, etc
● Drilling technologies
● Stakeholder management
● Geohazards-identification, mitigation, avoidance
● Data QC/QA - is that well really sour?
● Pore Pressure/Fracture Gradient prediction
● H2S Analysis and Regulatory Requirements for sour wells
● Data management and reporting

Committee Members

Division Chair: Kurt Armbruster, P. Geol. | email: kurt.eh@gmail.com

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Can Geomechanics Improve Your Drilling and Completions? Spoiler Alert – Yes. (.pdf)
Amy Fox | Enlighten Geosciences

February 14, 2018
Geosteering: what works, what doesn't? (.pdf)
Calin Dragoie | Chinook Consulting Services