Reservoir Engineer – Eagle Ford Job

Marathon Oil



Job Overview

Marathon Oil’s Eagle Ford Portfolio team is currently seeking a reservoir engineer based in Houston, TX. The team is responsible for financial forecast subsurface inputs and results, development planning, operations support, sanction efforts, portfolio optimization, economic analysis, commercial efforts, competitor intelligence, production variance analysis, and managing subsurface tools and databases. The primary goal of this position is to prepare asset year end reserve bookings, lead production forecasting processes, and communicate thorough understanding of the results and variances through time to asset leadership. Candidate needs to be able to handle a high volume of data and distill large datasets into executive summaries.  Candidate must be self-motivated and excel in a team environment.



  • Prepare asset reserves estimation, including DCA for 3,000+ unconventional wells, PUD type well profiles and associated volumes, calculate and QC cost averages and other economic inputs, and identify PUD locations using direct offsets
  • Manage business processes for production forecasting; decline curves, type curves, and well attributes
  • Conduct variance analysis for well performance
  • Highlight areas to optimize and maximize reserve bookings
  • Identify enterprise risk associated with projected reserves trends
  • Assist with internal/external slide preparation for investor relations, earnings release, etc. 
  • Collaborate on plan of development management process 


Education: Bachelors required, Petroleum Engineering preferred

Experience: Minimum 5 years of experience, 3 of which in unconventional reserve estimation

Technical Skills:

  • Working knowledge of SEC regulations governing reserve and resource estimation, including the application of reliable technology to book PUD reserves
  • Working knowledge of the PRMS framework for classification of reserves and resources
  • Experience with unconventional reservoirs and good understanding of well to well communication is a necessity
  • Experience with databases and basic coding abilities (Spotfire, Snowflake, SQL, and Excel VBA)
  • Experience in mining and utilizing external data sources (Enverus)
  • Economic analysis software Aries, Enersight, and ComboCurve required


Marathon Oil Corporation (NYSE: MRO) is an independent oil and natural gas exploration and production company based in Houston, Texas. With a material position in four of the best oil-rich U.S. resource plays in different stages of development, we offer a variety of career opportunities, whether you’re a recent college graduate or an experienced professional. You’ll have the tools to develop and refine the skills and knowledge you need to succeed.

Marathon Oil Company will take the necessary action to ensure that applicants are treated without regard to their race, color, religion, sex, age, disability, national origin, sexual orientation, genetic information, veteran status or other protected status under applicable employment law.

If you are a current Marathon employee please use the ERP website to submit referrals.

Posting Notes: ||  Houston  ||  TX   ||  United States (US)  ||  SF:LI; SF:DI; SF:GH; SF:MN; SF:RZ ||  Engineering  || Not Applicable  || || 32055  ||





Nearest Major Market: Houston

Job Segment:
Database, ERP, QC, SQL, Engineer, Quality, Technology, Engineering

To apply for this job please visit