Reservoir Engineer / Advisor III

Engineering - Reservoir Engineer / Advisor III at ABNL Limited

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Oct 28, 2026, 7:02 AM

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ABNL Limited was incorporated in 1992 as an Oil and Gas servicing company with a vision to provide professional engineering and technical services to the Oil and Gas exploration and production companies in Nigeria and the West African sub-region. Since its incorporation, the company has grown in leaps and bounds, expanding its business horizon, but still within the Oil and Gas sector.

ABNL is a 100% owned indigenous firm, with a shareholding in excess of 100 million Naira. Its' directors are individuals of proven integrity, who over the years have acquired the requisite experience in the Oil and Gas business, as well as in the banking and finance sector. The integrity of the directors and the staff of the company have been a priceless contributive factor in the growth and wellbeing of the company.

We are recruiting to fill the position below:

Job Title: Engineering - Reservoir Engineer / Advisor III

Location: Seplat House, Lagos

Employment Type: Contract

Overall Purpose

The incumbent is expected to exhibit skills in arrange of core areas in Reservoir engineering and be an independent contributor in multi-disciplinary teams charged with identification of production improvement opportunities and production optimization studies. He /She will also have primary responsibility to develop younger REs through on-the job training and sharing of best practices.

The contribution of this position directly affects the resource base and growth of the company in terms of hydrocarbon maturation.

The role of the Senior RE is to deliver quality studies, coach, and mentor younger REs, participate as a member of Subsurface teams to support field development planning through thorough understanding of relevant Reservoir engineering data & using same to build numerical reservoir simulation models of an Asset, recommend and champion pilots implementation leading to the enhancement of the Company’s oil and gas recovery and profits accordingly.

The Snr RE will be assigned to roles in either the Corporate or Asset teams as the business may demand.

His/her other roles will include contributions to Reserves coordination, New Business Development, budget management and competency development.

Principal Accountabilities

Provides estimates of oil and gas resources by conducting annual reserves evaluation, classification, and booking for the assigned assets, and document the report in an appropriate format. i.e Annual Review of Petroleum Reserves (ARPR).

Ensure that an HSE culture of Goal Zero is in place by contributing to key initiatives and providing appropriate role modelling: demonstrate full commitment and proactive HSE management; act as Emergency Response team member as appropriate. Conducts effective accident investigation and follow up.

Monitors production from existing fields, analyses all relevant data, and ensures that reservoirs are being properly managed, production is maximised, and recoveries are optimal. To establish reservoir management strategies where they do not exist and update them where they do.

Prepares detailed medium and long-term production forecasts for the asset budget planning cycle. Coordinate input from all field teams to business plan (wells/facilities)

Directs and supervises surveillance activities (MER, BHP etc.), and reservoir definition and behavior prediction of assigned reservoirs or fields.

Be familiar with various oil recovery enhancement techniques (water flood, gas injection, gas lift etc). Conducts, documents and presents, field reviews, and further development proposals.

Dissemination of best practices and provision of guidance to less experienced team members.

Prepares production testing proposals and provides guidelines for execution. Evaluates and interprets results, recommends optimum methods of performance monitoring. Must have experience in reservoir pressure & fluid sampling, fluid property modelling, routine and special core analysis.

Conducts conventional reservoir engineering and simulation studies to identify optimum recovery and field development options, adjusts reservoir development plans in response to changes in well and reservoir performance. Must have experience in well test design & interpretation, material balance modelling and performance modelling of vertical and horizontal wells.

Coach and mentor assigned junior reservoir engineers and other young engineers within Seplat as required.

Manage contracts for BHP/well testing/software by carrying out all contract holder responsibilities. Carry out technical and commercial evaluations, scoping, and secure contract approvals. Monitor and track contract performance

Knows the Company health, safety and environment policy, procedures, regulations and objectives as they relate to his area of responsibility.

Work in an integrated study team /asset development team where he/she can leverage his/her experience to generate quality studies and field development plans. Make RE input into and coordinate field development planning and integrated field studies. The required technical work will comprise but not limited to dynamic modelling, well/reservoir performance reviews, development options evaluation and economics.

Possesses working knowledge of gas condensate reservoir systems as well as gas field development experience.

Participates strongly in defining the scope and content of reservoir studies used to assist in determining well behavior and optimum recovery methods. Includes, establishing program specifications, reviewing available resources, preparing tender documents, reviewing and evaluating bids and monitoring study team performance.

Job Context & Challenges:

Studies, dynamic reservoir simulation building, analytical well/reservoir modelling, data acquisition & analysis, field development options evaluation, well & reservoir management, Reserves management and cost control. QA/QC, Coaching & mentorship roles..

The position of Snr RE exists to create value in providing technical expertise in Reservoir development planning, reservoir management, Reserves Evaluation and skills development of subsurface engineers.

The role of the Snr RE is mainly to optimize reservoir development and maximize reserves and production in assigned fields. The position has no direct budgetary control but will significantly influence cost of field development, well designs & completions and execution of activities that could run into several millions of USD. The role will coach junior REs and share best practices required for the resource base maturation and growth.

The position also directly and indirectly controls over 5 staff in all the Asset teams (Eastern and Western) working on dynamic model construction, Wells and Reservoir Management (WRM) and Field Development Plans for existing and new assets to deliver and sustain Oil & Gas production, data acquisition and surveillance activities and identifying opportunities to enhance oil and gas production.

Special Challenges:

Preparation of high-quality briefing documents and presentations for leadership as needed.

Success for Seplat requires close co-operation with development

Excellent inter-personal skills will be necessary to ensure that technical quality in the team is maintained at a high level, junior team members are effectively coached, and communication is optimised with both internal and external stakeholders.

The ability to understand both subsurface, well engineering and surface engineering challenges & skills in complex project maturation is critical.

(projects) and production (asset) teams, corporate and regional service providers and third-party contractors in both face-to-face and virtual teams.

Ready availability of data will be a challenge. Staff should be able to make use of large volumes of digital and hardcopy data stored on multiple platforms and filing systems distributed across numerous locations. Data management and quality control will continue to demand significant attention from staff in the foreseeable future to build an auditable portfolio of prospects.

Reconciliation of uncertain subsurface data and still delivering high quality, study results, well activities and reserves reports that are implementable without undue business exposure.

Delivery of high-quality work against very tight deadlines while maintaining excellence in analysis & task completion under pressure. The business cycle may require working long or unusual hours during peak periods and will include the following:

Job

Knowledge and

Qualifications

• As a Snr Reservoir Engineer, must have a broad understanding of other E&P disciplines and skills in all key reservoir engineering specialties.
• A University Degree in Engineering or equivalent with 8 - 12 years relevant experience, including a minimum of 8 years RE work experience in an operating company.
• Skills in the following:
• Knowledge in well delivery Operation and well Evaluation
• Well/Reservoir Surveillance – data acquisition, analysis & Interpretation
• RE Data Acquisition & Data Management
• Production Operation
• Analytical Reservoir Modelling (Material Balance analysis, DCA, PTA, BHP, etc.)
• Field development planning & co-ordination
• Reserves calculation and classification
• Well Planning & Execution within the context of multi-disciplinary team.
• Reservoir Simulation Model Construction
• Knowledgeable in modelling workflows including QC and taking Earth Model to dynamic Model.
• Well Modeling & Performance
• Very good knowledge of English Language
• Working knowledge of economic evaluation, risk assessment and long-range planning.
• HSE considerations in well management and completion operations
• Production System Optimization
• Coaching/Mentoring
• Waterflood and Gas Injection Management
• How to Apply
• Interested and qualified candidates should send their CV in MS Word to:
• [email protected]
• using the Job Title as the subject of the email.
• Application Deadline:
• 4th November, 2026.
• View all Jobs in Nigeria
• Lagos State