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Geoscience Engineer

Calgary, AB, Canada
June 10, 2022

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Arnaldo Gomez-Casseres

Cell. +1-587-***-**** Email:

Unit 26, 330 Canterbury Dr. SW, Calgary, AB


Experienced and driven Petroleum-Geology Engineer with over twenty years in the oil industry evaluating and conducting geomechanical 1D and 3D projects, log and core analysis, Pore pressures and Wellbore Stability Studies. A proven track of assessing the needs of clients by creating the best fit models integrating the gained experience in drilling, production, environmental, and geomechanics.


PhD Student in Energy Systems In progress

Universidad Nacional de Colombia

Master in Petroleum Geology 07/2018

Università degli Studi di Perugia, Italy

Bachelor of Sciences in Petroleum Engineering 06/1993

Universidad Industrial de Santander, Colombia

Environmental Management (Diploma) 06/2010

University of Calgary, Canada

Related Training

Carbon Capture, Utilization and Storage- University of Bergen e-learning,2021

Geomechanics International Symposium e-learning, 2021

Reservoir Geomechanics and Unconventional Geomechanics -Stanford University e-learning, 2019, 2016

3D Reservoir geomechanics (Visage-Petrel) Copenhagen, 2014

Rock Mechanics course Houston, 2014

Geomechanics for high pressure and high temperature environment Durham, 2013

Geomechanics for unconventional Calgary, 2012

Basic Geomechanics course, Schlumberger Mexico, 2010

Assisted Research and Development Projects

NextOil, Technical University of Denmark-Dong Energy 2014-2015

Joint chalk research (JCR), GEUS laboratory, North Sea Oil Companies 2012-2015

Measuring pore pressure in shale (MesPosh) 2012-2015

Geoscience project on overpressure (GEOPOP), Durham University 2014-2015

Drilling borehole stability and shale rock physics, SINTEF 2012-2015

Work Experience and Skills

Geomechanics Engineer-Consultant 04/2019-12/2019

Ecopetrol (Colombia)

Modeled geopressures and stresses on different assets in Magdalena’s valley of Colombia

Rock mechanics analysis of depleted reservoirs to avoid wellbore stability issues during drilling and production.

Analysis of mud weight and casing setting due to water injectivity effect to increase production.

Skills gained: Solving problems, multi-tasks, team work, preparing presentations, Operation meetings.

Lead Geomechanics Engineer 04/2012-02/2015

DONG Energy, North Sea (Denmark, Norway, and UK)

Supervised activities of the geomechanics team (4 people): MEMs, meetings, presentations, peer reviews, and schedules.

Modeled and followed up in real-time a very challenging project (HPHT-Deep water Hejre) with very successful results

Monitored real-time geopressures and wellbore stability (Solsort, Nini, Siri, and Cécile) getting a decrease in NPT during drilling.

Supervised 3D reservoir geomechanics projects to determine sand production, depletion, and cap-rock integrity to optimize wellbores planning in completions and production: Solsort, Hejre, and others.

Conducted coring tests for stress and wellbore stability analysis to identify the best drilling directions.

Skills gained: Software (Visage, Techlog, and Petrel), project management, multi projects, and schedules.

Geomechanics Engineer-Consultant 04/2010-02/012

Schlumberger, Mexico

Built unconventional (Tight gas) geomechanics models in Burgos VII asset (Sigma, Cuitlahuacs, Palmitos, Antillanos, and Comitas projects) for IPM and PEMEX considering stress changes, depletion, and fractures.

Monitored geomechanics projects in real-time located near salt bodies (Cantarel, Kutz, Ixtoc, Teotleco, and Nejo) in southern Mexico with a decrease in NPT, stuck pipes and kicks.

Characterized rock mechanics properties (permeability, porosity, Young’s module, and others), and stress orientation for different projects in Southern Gulf of Mexico near salt bodies

Monitored in real time a very important project for Pemex (HPHT in ultra-deepwater) “Puskon-1” well in the Gulf of Mexico with very successful results by reducing the NPTs, stuck pipes, wellbore stability issues, and kicks.

Skills gained: Software (Petrel and Techlog), customer support, technical knowledge, teamwork, presentations, and task coordination.

Geomechanics Engineer 08/2007-04/2009

Halliburton-KSI, Houston

Assisted the drilling engineers in Pemex-Reynosa about mud weights, well designs, loss controls, pore pressures, stress analysis and data correlations to improve and save drilling time

Set up the first RTOC (able to monitor more than 50 wells per day) of geomechanics and drilling optimization in Saudi Aramco focused on wellbore stability issues like losses, kicks, torque and drag, casing setting points, high pressures, and depleted zones.

Set up the first RTOC in Halliburton-Houston to support offshore activities in the Gulf of Mexico: mud weight, LOT’s, losses, stuck pipes, running casings, and cap-rock integrity

Built geomechanics models for Pemex’s top projects in deep water and carbonate (Labay and Lakach) using seismic velocity and correlation data in a VCDSE-PEMEX

Skill gained: Software (Predict, Geostress, Compass and Wellplan), presentations, and team player

Measure While Drilling Field Tech. 10/2006-08/2007

Ryan Energy, Calgary

Monitored well trajectories according to drilling plans to reach the companies targets (Encana, Nexen, and Canadian Natural Resources and others)

Identified depths and angles of the kick of points at which the wells needed to deviate for conventional and unconventional wells

Calibrated MWD tools to be used according to the requirements of the company like porosity, gamma-ray, resistivity, density, and others for conventional and unconventional wells in Alberta and British Columbia.

Skilled Gained: MWD software, customer services, working under pressure and in remote areas

Emissions Monitoring Analyst 09/2003-06/ 2006

MAXXAM Analytics, Calgary

Characterized emissions from sources to determine air quality and optimum processes for TransCanada, Suncor and others.

Analyzed trace metals: Na, Cl, and others using ICP/MS spectrometers and performed water and soil tests like BTEX, THE, CCME and OGG and heavy metals to determine the level of contamination

Skills gained: ICP/MS spectrometers, Relative Accuracy Test Audits (RATA), lab experience, safe work practice, and environmental regulations

Reservoir Lab Specialist 10/2002-07/2003

AGAT Laboratories, Calgary

Conducted routine analysis (porosity, permeability, and resistivity) in cores to determine porosity in vertical and horizontal scale for Pemex, Shell, Suncor and others.

Determined formation resistivity parameters on core samples

Measured relative permeability parameters at reservoir conditions of pressure and temperature to predict recoverable reserves

Performed capillary pressure measurements in cores to evaluate reservoir hydrocarbon saturation

Skills gained: rock properties, multi-tasks, team player, laboratory analysis and attention to details

Environmental Petroleum Auditor 03/1995-04/2000

Auditoría Ambiental, Colombia

Audited drilling, production, pipeline and seismic activities related to environmental policies for Petrobras Oil Co in the Rio Ceibas field.

Wrote drilling programs and environmental-drilling permits for Petrobras for the Ceiba and the Mangos assets.

Analyzed and treated water and soil waste from drilling and production activities according to International Standards. Toroyaco, Mary and Linda projects-Argosy Colombia

Skills gained: Lab analysis, Environmental legislations, Task coordination, Presentations, and Writing reports.

Environmental Petroleum Auditor 12/1993-12/1994

Geoambiental ltda., Colombia South America

Monitored fluid and soil treatments during drilling – Petrobras Colombia.

Performed Environmental Q.C. for 2D and 3D Seismic activities for exploration and development fields. Llanos Orientales, Magdalena Valley, and Putumayo.

Monitored air quality during production and drilling activities according to Colombian and International regulations –Petroleos Colombianos. Mid Magdalena Valley.


- Schlumberger software: PETREL, Stonefish and Techlog, Visage

- Halliburton: Compass and Wellplan

- Halliburton: Predict, Geostress and Presage

- Microsoft office and Adobe

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