Contact Information

  • Gwladys Gaillot
    (832) 380-9019


Senior Geologist / Stratigrapher – Deep-Water Specialist

Solve technical & commercial challenges through teamwork & inclusion of diverse perspectives


Senior Geologist with advisor experience in Oil & Gas industry, working multiple basins, prospects, and fields worldwide. Advanced expertise in conventional clastic reservoir characterization for developing play concepts and field development strategies in deep-water basins, successfully applied to Guyana & Suriname margin.


Guide and influence multidisciplinary teams and manage projects by coaching, mentoring, and collaborating with staff. Praised by peers for performing high-quality seismic interpretations with demonstrated business impact in predicting reservoir, seal, source distribution and assessment of hydrocarbon resources. Author content, teach, and coordinate classroom and field schools to develop capability skills in stratigraphy.


3D / 4D Seismic interpretation | Sequence stratigraphy | Geophysics | Well-Log analysis | Core analysis | Geological modeling | Assessment of conventional reservoirs | Depletion planning | Drill-well planning | Operations | Petrel | Project management | Lead by example | Coordination | Communication | Innovation | Business acumen | Bilingual French-US






ExxonMobil 13 years

2018 - 2021 (3 years)
Exploration Geologist | Stratigraphy Specialist
Houston, Texas, United States

Seismic sequence stratigraphy and reservoir sedimentology for prospect evaluation and field development (through February 2021)

• Consulted 10+ Deep Water project teams for prospect validity and identification of viable deep water clastic plays as subject matter expert in subsurface peer reviews.
• Informed geologic context discussions at high-graded opportunity scale (Mauritania) by building 20+ regional sediment fairway maps, including structural and DHI components for use in…

2014 - 2018 (4 years)
Research Scientist | Deep Water Stratigraphy Specialist
Houston, Texas, United States

Develop predictive Deep Water depositional models from High-Resolution (HR) seismic data; Transfer of knowledge and best practices in Deep Water stratigraphy

• Directed breakthrough research in deep water depositional processes resulting in fundamental changes in internal stratigraphic core concepts, applied to Guyana and other multimillion-dollar assets for reservoir characterization and modeling (West Africa, GoM, Russia, Canada).
• Integrated 2D/3D seismic, core and log data…

2008 - 2014 (6 years)
Development & Production Reservoir Geoscientist
Houston, Texas, United States

Development and Production phases prospect identification and maturation

• Informed development plans and identified dozens of prospects and drill-well opportunities for various West Africa Fields (WAF), including Zafiro reservoirs and Angola Block 15:
o Mapped 50+ reservoir surfaces for geological model framework and geophysical evaluation of hydrocarbon potential for Angola Block15.
o Interpreted 4D seismic volumes over 3 generations of baseline and monitor surveys in…

2006 - 2008 (2 years)
JAMSTEC: Japan Agency for Marine-Earth Science and Technology | CDEX
Yokohama, Kanagawa, Japan

Prospected 3D seismic for Gas hydrates and conducted research on heat flow derivation from Bottom Simulating Reflector (BSR) in the Nankai trough - Authored 1 publication at Geological Survey of Japan

2001 - 2004 (3 years)
CIFRE Research Engineer
Total | Techsia
Montpellier, Occitanie, France

PhD Research work in Sedimentology/Stratigraphy; Hosted by Techsia SA & sponsored by TOTAL
"Control factors for growth and development of channel-levee systems in modern Congo Deep Sea Fan" using bathymetric and seismic data.
Doctorate degree obtained with highest honors


A list of my core competencies includes:
• 2D/3D/4D Seismic interpretation
• Reservoir surfaces mapping for geological model framework
• Regional sediment fairway maps, including structural and DHI components
• Core description in digital format
• Well-Log Analysis
• Spectral shaping methods
• Automatic seismic facies recognition with machine learning algorithms
• Geophysical evaluation of hydrocarbon potential
• Reservoir Connectivity Analysis
• Stratigraphic Trap Risking
• Quantification and Prediction of Hydrocarbon Resources
• Development & Drill-Well planning/Execution
• Depositional models and 3D diagrams
• Joint-Industry Projects
• Training/Field Trip Design, Coordination and Delivery

Specialized Software: Petrel | VoxelGeo | Paleoscan | Geoteric | RokDoc | WellCad | ArcGIS | Illustrator

Languages: English | French



University of Montpellier
Doctor of Philosophy (PhD) in GeosciencesSedimentology / Stratigraphywith highest honors
Control factors for growth and development of channel-levee systems in modern Congo Deep Sea Fan

University of Montpellier
Master of Science (MS) Geology/Earth Science, General

University of Montpellier
Bachelor of Science (BSc) Geology/Earth Science, General