Job Purpose

Senior Geologist participates in correlating various kinds of technical data by coordinating with other subsurface discipline (geophysicists and reservoir engineers) with objectives to create maps and models to analyse reservoir geological distributions characteristics of assigned areas as well as prepare and execute delineation/ development drilling activities with drilling engineers for PTTEP ED.

Key Accountabilities

Ensure geological and petroleum system study integration to get best of resource evaluation and delineation, de-velopment well and platform locations.

• Provide geological and subsurface uncertainty input to field development plan in coordination with reservoir engi-neer and other related parties.

• Evaluate and integrate the data of subsurface (logs, cores, seismic), reservoir and production to perform reservoir characterization analysis and resources assessment to identify new development and infill opportunities in mature fields and support production optimization.

• Evaluate horizontal well opportunity by detailed reservoir analysis e.g. tank correlation, reservoir pressure & con-nectivity, sand mapping, reservoir characterization, HCIP estimation & economic analysis, Horizontal well planning & targeting, pre-job modelling.

• Execute horizontal well operations including preparation phase, drilling operations monitoring, and post-drilled evaluation / HCIP & reserves booking.

• Perform annual resources and reserve assessment.

• Prepare and execute delineation/ development drilling activities including preparation of delineation, development work program, well proposal, monitoring drilling operations, and post well evaluation to be in line with studies and programs.

• QA/QC geological technical works and perform as leadership role for oil development team.

Professional Knowledge & Experiences

• Bachelor's degree or higher in Geosciences

• 15+ years of experience in E&P Business related to subsurface tools and technologies.

• Strong understanding of the Gulf of Thailand (GOT) petroleum system, with familiarity in the well factory concept and processes.

• Extensive experience in oil and gas reservoir development, including well planning and targeting, monitoring, and execution of deviated and horizontal wells within the GOT.

• Experience in reservoir management and EOR

• Experience working in block G1/61 (Erawan, Platong or Satun & Funan) is an advantage.

• Proficient in subsurface software (e.g., Petrel, DSG) and related systems.

• Familiarity with procurement, contract preparation, and evaluation is an advantage.

• Experience in work program and budget preparation is a plus.

• Excellent communication and interpersonal skills.

• Good project management skill is required.

• Strong problem-solving abilities and a proactive approach to challenges.

• Ability to mentor and lead teams of geophysicists and other technical professionals.

• Ability to work in a dynamic, fast-paced offshore environment with a focus on delivering results.

• Strong written and verbal communication skills in English.