Job Title: Wellsite Geologist (WSG)
Client: Supermajor – Oil & Gas Operator
Location: Offshore – Southern North Sea
Assignment Type: Rotational, annually renewable contract
Start Date: July/August 2026 – 12 months (potential extension)
Shift Pattern: 3 weeks on / 3 weeks off
Description
Safety, Health and Environment (SHE)
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Serve as a visible safety role model, demonstrating a safety-first approach at all times.
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Promote a strong safety culture through coaching, engagement, and proactive intervention with rig personnel and geological service providers.
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Perform routine audits and checks on geological operations, including mud logging units, sample handling, gas detection systems, and compliance with Permit to Work requirements.
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Monitor and report safety observations related to subsurface operations and upcoming activities, intervening where necessary.
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Support and align with all contractor and operator HSE initiatives.
Operations
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Provide on-site geological supervision and assurance throughout drilling operations in accordance with approved well programmes and data acquisition objectives.
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Ensure geological contractors (mud logging, LWD/MWD, coring, wireline) are fully briefed, competent, and prepared to execute the programme safely and efficiently.
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Maintain close oversight during critical intervals such as casing points, reservoir sections, coring, logging runs, and drilling hazard zones.
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Monitor real-time drilling and geological data to identify formation tops, pore pressure trends, reservoir quality, and potential hazards.
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Ensure high-quality acquisition and processing of geological samples, cuttings descriptions, lag-time calculations, and gas data.
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Maintain a detailed daily geological log capturing progress, lithology, key events, issues, deviations, and subsurface risks.
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Report geological non-conformities, unexpected formation behaviour, or significant changes to prognosis through appropriate reporting channels.
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Lead daily coordination meetings with mud loggers, LWD engineers, drilling supervisors, and service providers.
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Provide comprehensive written and verbal handovers to incoming Wellsite Geologists and onshore Operations Geologists.
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Ensure all geological data (cuttings, logs, cores, pressure data, surveys) are quality checked and transferred to shore in line with data management requirements.
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Coordinate closely with drilling, completions, and production teams where operational interfaces exist.
Senior / Day Representative Responsibilities (Geology)
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Mentor junior Wellsite Geologists and support competency development.
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Provide geological leadership and decision support during critical operations such as casing, coring, and logging-while-drilling.
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Ensure the subsurface Plan of Action is followed and updated based on real-time information.
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Update daily geological forecasts, operational time estimates, and data acquisition schedules.
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Deliver accurate and timely reporting to onshore subsurface and drilling teams.
Competences
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BSc or MSc in Geology, Geoscience, or a related Earth Science discipline (relevant experience may be considered in lieu).
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Proven experience as a Wellsite Geologist in the Southern North Sea, including environments with shallow gas, complex overburden, HP/HT, or depleted reservoirs.
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Knowledge of regional stratigraphy, reservoir behaviour, pressure regimes, and common drilling hazards.
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Strong capability in real-time interpretation of LWD data, mud logs, gas trends, and lithology.
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Experience using standard geological reporting systems and digital well data platforms.
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Understanding of offshore regulatory requirements and geological data standards relevant to the region.
Special Requirements
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Valid offshore survival certification (BOSIET or FOET with CA-EBS).
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Valid offshore medical certificate.
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Strong communication skills with the ability to brief multidisciplinary teams clearly.
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Excellent analytical and decision-making capability in time-critical situations.
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Proactive, collaborative approach with a strong commitment to safety and operational performance.