ALEXANDRA WEBSTER
Geologist
Summary
Results-driven Geoscientist and leader with extensive global experience in the Oil & Gas industry, specializing in the integration of seismic and well data to develop robust stratigraphical and sedimentological models for exploration, appraisal, and development. Proven expertise encompasses a variety of geological settings and basins, from unconventional resources to deepwater depositional systems, contributing to numerous exploration projects at regional, sub-regional, prospect, and reservoir scales. Strong ability to synthesize complex datasets—including geophysical, petrophysical, and well data—enables a comprehensive understanding of subsurface geology, facilitating accurate predictions of reservoir presence and quality. Committed to collaboration and mentoring within multidisciplinary teams, consistently delivering results through effective communication of complex technical concepts to stakeholders at all levels.
Overview
25
25
years of professional experience
5
5
Certifications
2
2
Languages
Work History
Geoscience Consultant
Subsurface Consultants & Associates
Houston, TX
03.2025 - Current
- Geomodelling for volumetric estimation for the appraisal and risk analysis of a discovery offshore West Africa.
- Field evaluation for STOOIP redetermination for an offshore field North Sea: seismic interpretation, well correlation/stratigraphic analysis and collaboration for geomodelling.
Geology Supervisor
APACHE CORPORATION
Houston, TX
10.2013 - 12.2024
- Team Lead: provided project or task management and supervision of production geology tasks. Management, leadership, and people accountability responsibilities for Legacy Permian Geologists. Implemented recompletion programs that have direct impact on daily production and reserves. AFE reviews for Legacy & GOM.
- Integrated field evaluation for water floods and CO2 injection enhanced recovery programs: Acreage evaluation. Reserves calculation. Assist regulatory in Leases and proposals evaluations.
- Evaluation for non-operated leases in the GOM, Midland basin and Bakken: sweet spot/fairway and landing zones identification and mapping. Recommendations for upper management. Provided geological input and evaluation for reservoir and production engineering evaluation.
- Business Development: provided all the geological data, and support for the Legacy Divestiture data-room. Integrated field evaluation of main producing fields to calculate remaining reserves and upside potential. Legacy Asset was successfully divested for $950MM. Provided data to BD for GOM.
- Permian Basin & GOM 2022-2024
- Suriname Team 2020-2021
- Egypt Engineering, Improved Recovery & Reservoir Management Teams 2013-2019
Geologic Advisor
OCCIDENTAL OIL & GAS
Houston, TX
08.2011 - 10.2013
- Business Development: Full field geological evaluation of producing oil fields in Abu Dhabi to participate in ADNOC (Abu Dhabi National Oil Company) bid round. Recommended growth opportunities. Provided Oil in Place volumes and reserves reviews to Upper Management.
- Oman Team: provided geological support in 3D reservoir modeling and characterization for carbonate fields in Oman.
- Permian: successfully prospected, proposed and drilled the first Wolfcamp/BoneSprings unconventional program for Oxy at the Delaware Basin. This program opened a new successful resource play for the company. Play evaluation based on regional geology, geomechanical and geophysical data integration. Reservoir characterization and well placement. Data analytics, and competitor analysis of existing producing horizontals using Spotfire and Petrel. Defined and mapped sweet spots and landing zones. Well planning and Geosteering, and Geosteering oversight of wells.
- Project Manager & AFE generation: coordinate land, regulatory, completions and drilling for unconventional program.
- Existing Conventional Producing Assets in Delaware Basin: Supported engineers in surveillance, well completions and workovers for existing fields. Proposed new drilling program of 16 wells in Red Bluff & Collie area that resulted in an increase of 20% of daily production. Geologist for EOR CO2 floods in the Permian basin.
- Mentor of new hires & Interns.
Senior Geologist
DONG ENERGY
Copenhagen
04.2009 - 07.2011
- Project Manager & Geoscientist for Tobermory Field Appraisal Project: Coordinated a multi-disciplinary team in the Evaluation of an Appraisal Well located offshore on the West Shetland Basin, UK. Performed integrated reservoir characterization that included logs and seismic interpretation of horizons and faults, and integrated seismic amplitude analysis. Core interpretation to define facies and flow units. 2D and 3D mapping. Analysis and integration of well test results. Presented results and recommendations to upper management and partners.
- Appraisal Geologist and 3D geomodeler as part of the team for the initial evaluation of Solsort, one of the latest oil discoveries in Denmark. Calculated OOIP, risk and uncertainty analysis.
- Built and updated 3D reservoir models for fields in Denmark, Norway and UK. Provided support and mentoring in Reservoir Modelling.
Geologist
OCCIDENTAL OIL & GAS
Houston, TX
07.2001 - 03.2009
- Development Geologist in the San Jorge Basin Argentina: proposed 14 producers, injectors, step out and exploration wells. Assisted engineers in surveillance and identified workover opportunities to increase daily production. Presented my proposed locations in meetings with business partners for approvals.
- Detailed Reservoir Characterization and geomodelling of fluvial and shallow marine systems, interpreted and integrated core analysis, logs and seismic data. Provided 3D geological models for water flood projects, and infill drilling.
- Elk Hills: Proposed over 30 wells that increased 15% of the oil base production, including infill wells, horizontals, replacements, gas injectors bypassed oil, & improved recovery opportunities. Identified workover opportunities. Assisted engineering staff in the surveillance process, AFE’s elaboration and design of well completions. Reserves reviews.
- Reservoir Characterization & 3D modeling of a Nitrogen Injection Project that added 40 MMB of reserves for the ESOZ zone in Elk Hills.
- Latin America New Ventures: Identified exploration opportunities doing regional geologic evaluation, analysis of petroleum systems and geological evaluation of existing fields. Assessment of existing prospective resources. Established relationships with government entities for data exchange. Give recommendations to Upper Management.
- Production Geology Team: 3D Reservoir Modeling (using Petrel) for Projects in Qatar, Oman, Ecuador, Colombia & Pakistan.
- Wellsite & Development Geologist Training program (Elk Hills, CA)
- Production Geologist in Elk Hills, CA Houston, TX and Buenos Aires, Argentina
Education
Master of Science - Petroleum Engineering
University of Southern California
Bachelor - Geology
Universidad Nacional de Colombia
BogotáSkills
Petrel, DSS, DIMS, Lowis, UNIX, RoseRa, GeoX, OpenWells, EarthVision, ArcGIS, Geographix, OFM, IHS, Spotfire, Kingdom, Petra, GeoGraphix
Certification
American Association of Petroleum Geologists (AAPG).
Timeline
Geoscience Consultant
Subsurface Consultants & Associates
03.2025 - Current
Geology Supervisor
APACHE CORPORATION
10.2013 - 12.2024
Geologic Advisor
OCCIDENTAL OIL & GAS
08.2011 - 10.2013
Senior Geologist
DONG ENERGY
04.2009 - 07.2011
Geologist
OCCIDENTAL OIL & GAS
07.2001 - 03.2009
Bachelor - Geology
Universidad Nacional de Colombia
Master of Science - Petroleum Engineering
University of Southern California