Highly analytical senior geoscientist with extensive experience in seismic interpretation, reservoir characterization, exploration, and development across the Gulf of Mexico, Gulf Coast, Midcontinent, and Permian Basins. Track record of integrating multidisciplinary subsurface datasets, and optimizing operations through advanced geophysical workflows, including seismic attribute analysis, inversion, and petrophysical analysis. Skilled in all aspects of volumetric assessment for field development planning and executing drilling proposals using software like Petrel. Adept at generating prospects, evaluating behind-pipe and infill opportunities, and delivering technical and economically sound recommendations in complex structural regimes using understanding of salt tectonics. Knowledgeable in related subsurface disciplines (petrophysics, petroleum geochemistry, reservoir engineering, and well economics).

Areas of Expertise

♦ Field Development & Appraisal ♦ Subsurface Data Integration ♦ Salt Tectonics ♦ Infill Drilling & Reserves ♦ Financial Analysis & Planning

♦ Conventional Oil & Gas Development ♦ Fluvial/Shallow Marine Environments ♦ Risk Assessment & Mitigation ♦ Seismic Interpretation

♦ Reservoir Engineering ♦ Asset Acquisition ♦ Prospect Generation

Professional Experience

SGC ENERGY CONSULTING LLC Oct 2019 – Present

Consulant

Plan and conduct in-depth reviews of Class VI permits aimed at ensuring and maintaining CARB compliance for carbon capture projects. Analyze saltwater disposal solutions for decommissioned oil fields in the Permian Basin with a focus on optimizing environmental and operational outcomes. Oversee all aspects of seismic interpretation and analysis for an untested fault block on a salt-supported structure in the East Texas salt basin. Develop and facilitate advanced stratigraphic and log-derived maps highlighting bypassed potential in stacked Cotton Valley deltaic reservoirs, while contributing to the assessment of 2P reserves. Assess and bid on producing assets with multidisciplinary teams.

Key Accomplishments

● Directed regional evaluations of the Haynesville shale and generated strategic lease opportunities in East Texas.

● Executed detailed geological field studies across productive fields in East Texas, focusing on Cretaceous and Jurassic formations aimed at generating new prospects and proposing strategic acquisitions.

● Drove business growth through strategic development, project execution, and data-driven decision-making.

Key Projects

Cenomanian Strandplain Reservoir Prospect

● Interpreted 2D and 3D seismic data to identify and map prospective reservoir structures. Minimized data gaps and challenging unconformable reservoir horizon geometry by integrating geologic data and refining structural model.

● Defined and validated two previously unrecognized closure opportunities on the margin of a historical field.

● Evaluated complex salt-related crestal faulting to de-risk drill site by leveraging expertise in structural geology.

Tithonian Deltaic Reservoir Field Study

● Validated reserve estimates via comparison of petrophysical and map-derived volumetrics; provided client confidence in remaining reserve potential. Digitized extensive data from public and private sources for comprehensive project coverage.

● Built a robust Kingdom Suite project, incorporating geologic, engineering, and cultural data.

● Subdivided and mapped major producing intervals, correlating them with historical production data.

● Performed behind-pipe reserves evaluation for each well, identifying untapped potential.

● Created hydrocarbon pore volume maps using reservoir facies analysis and contact levels.

Kimmeridgian Paralic Reservoir Play

● Led a comprehensive regional geological study and evaluated the potential of an emerging play, successfully identifying and driving strategic mineral acquisition opportunities, positioning the portfolio for growth and expansion.

O’BRIEN RESOURCES LLC (OBENCO) May 2015 – Oct 2019

VP of Geoscience

Reduced reliance on external contractors and minimized costs by leading the development and execution of in-house attribute analysis and seismic inversion workflows. Recharacterized the reservoir model in the Tithonian interval through detailed petrophysical analysis and facies mapping; identified a larger regional trend with horizontal development potential. Developed and defined a novel exploration concept by interpreting distal marine (turbidite) facies from 3D seismic data, revealing an undetected channel-fan complex using a proprietary seismic library.

Key Accomplishments

● Received fast track promotion from staff geophysicist to VP of Geoscience; steered, trained, and guided a team of four direct reports as well as planned and managing all in-house seismic interpretation responsibilities.

● Generated significant cost savings by internalizing attribute analysis and inversion processes. Streamlined the project portfolio by revising risk profiles, allowing organization to focus resources on the most profitable ventures.

Key Projects

East Texas Horizontal Drilling Program (30 Wells)

● Reduced time spent out of the target zone up to 80% by introducing the 3D seismic technology in well planning.

● Improved communication between office, geosteering and rig during operations by performing depth conversion in real time.

● Applied expertise in salt tectonics and complex faulting for well planning efforts with engineers to maximize time in zone.

Cambrian Midcontinent Project

● Revised and improved seismic-to-well ties; addressing discrepancies, and updated portfolio risk assessment (Pg) that led to abandonment of the project, redirecting resources to more promising opportunities.

● Revised probability of geologic success (Pg) from 50% to 25% across the portfolio using data-driven approach.

Albian Shallow Marine Carbonate Drilling Program

● Enhanced directional planning through relay fault system using detailed fault mapping and understanding of salt withdrawal basin structural settings.

● Improved time-in-zone between offset fault blocks using depth-converted volume during planning phase and for real-time operations support.

● Predicted downdip productive limit of reservoir using an integrated geologic model and expertise in salt tectonics.

HILL GEOPHYSICAL CONSULTING Oct 2013 – May 2015

Consulting Geophysicist

Drove exploration efforts and improved client development strategies by leveraging proprietary seismic data library. Planned and analyzed marginal drilling areas in the North Louisiana salt basin using inversion and attributes. Redefined the geological model for a Jurassic reservoir and uncovered multiple new prospect opportunities within an established field leveraging knowledge of distal marine depositional systems. Created innovative subsalt exploration concepts in South Louisiana by integrating legacy well and seismic data. Designed and developed comprehensive regional reservoir and structural maps by merging multiple 2D and 3D seismic volumes.

Key Accomplishments

● Maximized exploration outcomes by expanding expertise from offshore geology to advanced geophysical workflows, incorporating attributes, inversion, and petrophysical analysis.

● Characterized reservoirs in the Oxfordian Smackover trend of South Alabama and Florida, identifying pay zones, diverse reservoir facies, and karsting.

● Discovered a turbidite channel feeder system into a producing field and identified two distinct splays outside the main channel, leading to new development prospects, tied in all well data to augment interpretation.

NEXEN PETROLEUM USA, INC. May 2006 – Oct 2013

Geologist

Conducted 3D seismic interpretation, time-depth conversion, amplitude evaluation, and biostratigraphic correlation for a flank amplitude prospect in the Gunnison field (Garden Banks), enabling successful drilling by the operator. Mapped regional 3D PSDM volumes to identify subsalt Miocene prospects and regional trends, primarily in Green Canyon. Contributed to development projects in the Longhorn field (MS Canyon), Aspen and Gunnison fields. Ensured the success of exploration projects and mastered 3D seismic interpretation and analysis. Studied complexities of halokinesis and its impact on exploration. Created salt masks for PSDM reprocessing efforts in close cooperation with processors.

Key Accomplishments

● Identified and mapped shallow amplitude above producing intervals; performed full evaluation post drill.

● Conducted detailed field mapping using log and seismic data for Gunnison field (Garden Banks area) and Longhorn field (Mississippi Canyon) for input into 3D static geocelluar models using Petrel.

● Gained a solid foundation in salt tectonics and deepwater depositional systems, which enabled application to onshore interior salt basins in Texas and Louisiana.

Additional Experience

LAS PRO, LLC

Co-Founder

● Secured angel funding to bring vision to life; achieved a working proof of concept for AI-powered software solution.

● Showcased exceptional technical communication skills by delivering multiple project pitches, developing compelling pitch decks, and successfully submitting an SBIR grant proposal.

● Gained deep technical knowledge in Python, SQL, Tensorflow/Keras, and other data science tools through rigorous coursework, applying these skills to real-world problems.

Education

MBA (Finance) 2012 | University of Texas at Dallas

MSc (Geology) 2006 | University of Louisiana at Lafayette

BSc (Geology) 2003 | Louisiana State University, Baton Rouge

Publications

● Comegys, S.G., Automated well log digitizing using Machine Learning, presented at AAPG U-Pitch 2021 & Shreveport Geological Society 2022, Geogulf 2020.

● Comegys, S.G., Lu, Q., Johnson, P., The effects of complex geology in planning long horizontal wells, Abstract, presented at GCAGS 2018

● Comegys, S. G., Wagner, J. B., Kucinskas, D. P., Nall, J., and J. Colliton, 2008, Implications of an Evolving Channel-levee System on Reservoir Distribution: An Example from the Upper Miocene to Lower Pliocene Gulf of Mexico (abstract): AAPG International Meeting, Cape Town, South Africa.

● Comegys, S. G., G. L. Kinsland, and F. C. Breland, Jr., 2007, Stratigraphic and structural study of Paleogene Wilcox strata in east-central Louisiana: Implications for coalbed natural gas exploration: Gulf Coast Association of Geological Societies Transactions, v. 57, p. 139-150.

● Kinsland, G., J. Kull, F. Breland, and S. Comegys, 2006, Development of a 3-D Virtual-Reality Geographic Information System Database for North Louisiana – Primary Purpose: Coalbed Methane Resource Delineation, in B. Lock, ed., Transactions Gulf Coast Association of Geological Societies, v. 56, pp. 367 - 370.

● Comegys, S. G., 2006, Lower Wilcox Group Coal Distribution in a Portion of Northeastern Louisiana, master’s Thesis, University of Louisiana at Lafayette, Lafayette, Louisiana, 111 p.