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About Belloy


Years Experience



Wellsite Geologists
Best Awarded Company

About Company

Trusted Wellsite Geologists...

Belloy Geologists is a Calgary based privately owned company providing geological wellsite supervision now for over 40 years. Belloy Geologists was first incorporated to provide on-site geological supervision during the drilling of oil and gas wells in the Western Canadian Sedimentary Basin.

Geological Expertise

Belloy Geologists is a member of ISN Networld and Comply Works safety registries and have up to date WCB accounts in Alberta, Saskatchewan and British Columbia.

To date, Belloy Geologists has supervised 25,000 wells across Calgary, Western, Eastern and Northern Canada and internationally.

What they’re saying?

The Principals

Belloy Geologists is managed by Doug Oicle, President; Brian Fyke, Executive Vice-President; Rob Harvey, Operations Manager; Jeff Kriz, Operations & Geosteering Manager; and Keith Gillis, Operations & Geosteering Manager. As degreed professional Geologists (APEGA) with backgrounds in petroleum and minerals exploration, we bring a practical approach to the hiring and training of our associates. We encourage the continued improvement of even our most senior associates by promoting continuing industry-related education. We do our best to provide each of our clients with an associate that is well suited for the specific play, and make every effort to provide the best quality service to all our clients.

Jeff Kriz
Keith Gillis
Rob Harvey
Jeff Kriz

Jeff graduated from the University of Calgary in 2009 with a B.Sc. in Geology (Petroleum Concentration). For the next 2 years, Jeff studied Mining & Mineral Exploration at BCIT in Burnaby, BC while doing field work focused on a rare earth mine development in Alaska for Aurora Geosciences. He then joined the oil patch in 2011 and worked as a Wellsite Geologist for 10 years across the WCSB. Before joining Belloy, Jeff gained practical experience running Rogii’s StarSteer software and eventually joined Rogii in 2021 where he gained the title of Technical Support Lead. Jeff’s knowledge of drilling operations and geosteering will be a great asset to Belloy’s management team. He currently holds a P. Geol. with APEGA.

Jeff Kriz

Operations & Geosteering Manager

Keith Gillis

Keith graduated from Saint Francis Xavier university in 2012 with a BSc in Geology. Following graduation, Keith spent two years mapping and core logging on various mineral exploration programs in eastern Canada. Keith then joined Belloy in 2014 as a wellsite geologist and has since supervised 200+ wells across the WCSB. In addition to his extensive wellsite and remote geosteering experience, he has also spent time as an in-house operations geologist consultant. Keith is also registered as a Professional Geoscientist (P.Geo) with the Association of Professional Engineers and Geoscientists of Alberta (APEGA).

Keith Gillis

Operations & Geosteering Manager

Rob Harvey

Rob graduated from the University of Calgary in 2005 with a B.Sc. in Geology. His first exposure to the patch was as a roughneck for Precision Drilling before university. Prior to joining Belloy Geologists in February 2007, Rob worked as an office geologist with Canadian Natural Resources Ltd. Since joining Belloy Geologists, Rob has supervised vertical and horizontal wells for numerous operators along with covering rotations on our remote geosteering work. He is currently a member of the CSPG, AAPG and holds a P. Geol. with APEGA.

Rob Harvey

Operations Manager

Brian Fyke

Brian graduated from the University of Calgary in 1989 with a B.Sc. in Geology. Mr Fyke joined Belloy Geologists as a wellsite geologist in 1993. After 5 years in the field he moved into the office joining the management team in the fall of 1997. Prior to joining Belloy Geologists Brian worked as a field geologist on remote gold exploration projects across Northern Canada for Taiga Geological Consultants and Noranda Mining and Exploration Inc. These projects included participating in grass roots exploration up to supervising and managing multiwell drilling projects. Mr Fyke sat on the board of directors of New North Resources, a junior oil and gas company from 1999 to 2002. He is currently a member of the CSPG, AAPG, and APEGA.

Brian Fyke


Doug Oicle

Mr. Oicle graduated from St. Francis Xavier University in Antigonish, Nova Scotia with a B.Sc. Hons. in Geology. The next 5 years were spent in the mineral exploration industry as a mapping assistant with the Nova Scotia Department of Mines, Seabright Resources, Nova Gold Exploration in Nova Scotia, Taiga Consulting with work in the North West Territories and with East Field Resources out of Vancouver with mineral exploration in north British Columbia. The exploration projects involved ground level mapping, geochemical testing, MAG & VLF surveys and trenching. These evolved into drilling projects involving the planning of drill targets, mobilization of equipment, camps and personnel, drilling support, core logging, report generation and open-pit mapping. Doug joined Belloy Geologists in 1990 as a wellsite geologist and supervised over 130 wells. In 1994, he joined company founder Bob Sullivan as part owner and operations manager of Belloy Geologists, became Vice President and later President on the retirement of Mr. Sullivan. He is currently a member of the CSPG, AAPG and holds a P.Geol. with APEGA.

Doug Oicle


Grain Analysis

Get to Know Belloy

Company Culture

committed to providing our customers with exceptional service.

Belloy Geologists has an extensive selection of wellsite geological associates, whose breadth of experience covers the entire Western Canada Sedimentary Basin along with some exposure to eastern North America and overseas drilling. We can provide wellsite geologists to meet your specific needs. All of our associates have a minimum 4 year B.Sc. in Geological Sciences, and have also completed the Canstrat Sample Examination Course and a basic wireline log interpretation course or have related industry experience. 

Experienced Geological Associates

Things you would like to know about

Geological Wellsite Supervision

Our main service remains geological wellsite supervision for the oil and gas industry but has expanded to include operational support, assistance in the implementation of multi-well programs, industrial mineral targets, water source projects, petrological analysis and remote Geosteering services.  

With a focus on providing quality service and dependable client support both in the field and in the office, Belloy Geologists has developed long term relationships with hundreds of clients over the years that translated into many repeat opportunities to provide professional geological coverage.

At Belloy Geologists, we take pride in providing the highest quality service and in developing trusting long term relationships with both our clients and our geological associates. With our large number of experienced geological associates (all with a minimum B.Sc. degree in Earth Science), Belloy Geologists can meet the needs of all operators and has proven to constantly evolve with this ever changing industry.

Dougl Oicle – President, Brian Fyke – Vice President, Rob Harvey – Operations Manager, and Jeff Kriz – Operations and Geosteering Manager (all P.Geol.’s) operate Belloy Geologists as owners. All having previous geological wellsite supervision experience, the management group is very strong in creating a balanced approach to providing the best coverage to suit the client’s needs, following the daily operations to ensure execution of that coverage, quality control and constant monitoring of our safety practices to ensure zero incidents.

Providing Geosteering Services Worldwide