Sr. Reservoir Engineer (US Gulf)

INEOS USA OIL & GAS LLC; Houston (TX); On-site; USD 160,000 - 260,000; Full time

Job summary

INEOS Energy Petroleum USA Inc. in Houston seeks a Senior Reservoir Engineer to provide reservoir engineering support across producing assets, developments, and new projects.

You will conduct surveillance, PTA, history matching, and production optimization, while developing models and forecasts to inform reserves and economics. The ideal candidate has 10+ years' deepwater Gulf experience, strong collaboration with geoscience and operations, and proven project management and reporting skills.

Qualifications

• Bachelor's degree in Petroleum Engineering or Reservoir Engineering required.
• Minimum of 10 years’ deepwater Gulf of America experience in oil and gas, operated and non-operated assets.
• Proficiency in reservoir engineering analytics and simulation methods (well test analysis, reservoir modelling, reservoir simulations, PVT, production forecasting).
• Ability to write technical reports and to present information effectively.
• Proven project management skills with pragmatic, technically sound recommendations.
• Ability to structure work around deadlines and multiple projects in a fast-paced environment.
• Strong collaboration with operators, partners, asset teams and specialists.

Responsibilities

• Provide reservoir engineering support across producing assets, developments, and new projects, including surveillance, PTA, simulation, history matching, optimization, forecasting and reserves evaluation.
• Design and support evaluation programs for exploration and appraisal, including log, fluid and core analysis.
• Develop and maintain reservoir models, generate forecasts and reserve estimates, and support reserves reporting and economics.
• Monitor well, reservoir and asset performance; analyze trends, identify root causes and recommend actions.
• Collaborate with geoscience, production, drilling, commercial, regulatory and partner teams to align evaluations with business goals.
• Support technical assurance, portfolio management and decision-making by assessing performance vs forecasts and reserves.
• Build strong relationships with operators and partners, acting as a technical advisor and providing experience-based recommendations.
• Prepare clear technical reports and presentations; promote high-quality data and efficient workflows; identify process improvements and innovative strategies.

Skills

Reservoir engineering

Deepwater experience

Cross-functional collaboration

Technical reporting

Project management

Presentation skills

Education

Bachelor's degree in Petroleum Engineering

Job description

Compensation Grade ONS-USD-37

Who We Are

INEOS Energy Petroleum USA Inc. (the US Gulf). The key focus for INEOS Energy Petroleum USA Inc. (the US Gulf) is to influence our partners in our two major assets, along with a portfolio of smaller assets, and to acquire, explore, develop and produce a growing inventory of world class assets in the US Gulf. Owning and operating producing US deepwater assets is part of INEOS Energy’s strategy to build a global integrated portfolio, fit for the energy transition, offering high-quality energy solutions to its customers.

Summary of Position

Senior Reservoir Engineer

Primary Job Responsibilities

• Provide reservoir engineering support across producing assets, developments, and new projects, including reservoir surveillance, pressure transient analysis (PTA), reservoir simulation, history matching, production optimization, forecasting, and reserves evaluation.
• Design and support reservoir evaluation programs for exploration and appraisal activities, including log, fluid, and core analysis.
• Develop and maintain reservoir simulation models, generate probabilistic production forecasts and reserve estimates, and provide modeling inputs to reserves reporting, AOPs, strategic planning, and economic evaluations.
• Monitor well, reservoir and asset performance, analyze production and injection trends, identify root causes of variances, and recommend actions to improve outcomes.
• Collaborate with geoscience, production engineering, drilling, commercial, regulatory, and partner teams to align technical evaluations with business objectives and development plans.
• Support technical assurance, portfolio management, and decision-making by assessing performance against forecasts and reserves, documenting changes, and evaluating development opportunities.
• Build strong relationships with operators and partners, serving as a key technical advisor and providing experience-based recommendations to enhance asset value.
• Prepare clear technical reports and presentations, promote high-quality data and efficient workflows, and identify process improvements and innovative strategies to maximize reservoir performance and value.

Education & Experience

• Bachelor of Science degree in Petroleum Engineering or Reservoir Engineering.
• Minimum of 10 years’ deepwater Gulf of America experience in the oil and gas industry, both in operated and non-operated assets.
• Thoroughly proficient in all reservoir engineering analytical and simulation tools and methods, such as well test analysis, wellbore, network and reservoir modelling, reservoir simulations, PVT analysis, production forecasting and reserves evaluation.
• Ability to write technical reports and correspondence and to effectively present information.
• Proven project management skills, with a solid track record of developing pragmatic, technically sound, and commercially relevant recommendations.
• Able to structure work around deadlines, compliance requirements, project milestones.
• Ability to work on multiple projects simultaneously in a fast-paced environment.
• Proactive, problem-solving individual.
• Strong collaborator able to build trust with operators, partners, operations, asset teams, and technical specialists.
• Excellent communication and presentation skills, especially in high-stakes environments involving executive leadership and joint venture partners.

INEOS is a world class chemical company whose products touch every aspect of modern day life. Our company is comprised of 36 businesses with 194 sites in 29 countries throughout the world. We also have interests in consumer brands and sports on a global level.

Safety is our number one core value.

We also take pride in our culture of diversity, inclusion, sustainability and giving to the communities in which we live.

To learn more about our company and the story of our heritage, go to www.ineos.com.