Qureos Mentor

visuna

<div><p>Job Reference: 251616</p><div><br>
</div><div><div><div><p>Upstream
</p></div></div><p></p><div><div><b>Start Date: </b>01/09/2026</div><div><b>
Applications close on: </b>14/08/2026</div><div><b>
Contract Type: </b>Contract</div><div><b>
Country: </b>Saudi Arabia</div><div><b>
Discipline: </b>Water</div><div><b>
Job Contact: </b>sonja.fielding@visuna.com</div>
</div></div><div></div><div><div><div><div><div><div><p>Our Client is seeking a Senior Groundwater Modeler for a project in Saudi Arabia.</p>
<p></p>
<p>This is to lead the numerical groundwater modeling and Master Plan works of a major urban rising-groundwater program. The role owns the integrated modeling system in which a groundwater model is coupled to the dewatering, water-supply, wastewater and overland-flow systems that drive rising shallow water tables, delivering the calibrated model, reliability analysis, the 2050 Master Plan and the governance-controlled decision-support tool handed over to the client. The modeler reports to the Program Team Leader and interfaces with the SLB-led program team responsible for monitoring, database/GIS, tender packages and water-balance studies.</p>
<p></p>
<p><b>Reporting &amp; Deliverables</b></p>
<p>
The Senior Groundwater Modeler reports to the Program Team Leader and is accountable for the Model Assessment Report, conceptual and preliminary models, twelve calibrated child models, sensitivity and validation reports, calibration and scenario reports, the reliability report, the 2050 Master Plan and action plan, the decision-support emulator, and the Task Completion Report &mdash; each delivered per the project milestone schedule and to the client&rsquo;s acceptance.</p>
<p></p>
<p><b>Core Responsibilities</b></p>
<p><b>
Model Assessment, Conceptualization &amp; Preliminary Models</b></p>
<ul>
<li>Assess and select the model suite (water-balance, groundwater, 1D dewatering/wastewater/water-supply, 2D-overland, integrated) and document a Model Assessment Report for client approval.</li>
<li>Consolidate the Riyadh hydrogeological conceptual model (regional hydrostratigraphy, gaining/losing wadi behavior, fracture corridors, urban recharge/drainage) defining layout, model area and input parameters</li>
<li>Select and secure approval of open-source modeling software provided to the client free of license cost; build preliminary (uncalibrated) models to expose data gaps and inform the survey plan.</li>
</ul>
<p></p><p><b>Neighborhood Child Models &amp; Recharge</b></p>
<ul>
<li>Develop twelve high-resolution child models &mdash; one per water-balance area &mdash; nested in the regional parent to quantify urban recharge and produce a defensible city-wide recharge parameterization.</li>
<li>Calibrate child models against groundwater levels, drainage flows and water-balance consistency, focusing on leakage fractions, hydraulic conductivity and drain conductance.</li>
</ul>
<p></p><p><b>Sensitivity, Detailed Construction &amp; Validation</b></p>
<ul>
<li>Run sensitivity analysis on all input parameters (local Jacobian-based and global ensemble screening) to rank controls and prioritize data acquisition.</li>
<li>Construct the detailed integrated models and validate them against existing observations and known system behavior prior to calibration.</li>
</ul>
<p></p><p><b>Integrated Dewatering, Network &amp; Overland-Flow Modeling</b></p>
<ul>
<li>Couple the groundwater core to 1D dewatering pipes/canals (CLN / DRN / RIV) and represent water/storm/sewer network leakage so groundwater response to each network is explicitly defined.</li>
<li>Route rainfall-runoff via 2D-overland or lumped elements for pluvial-flood and early-warning assessment.</li>
</ul>
<p></p><p><b>Measures, Mega-Structures, Calibration &amp; Reliability</b></p>
<ul>
<li>Assess individual dewatering measures and combine effective ones into approved scenarios, incorporating climate-change impacts.</li>
<li>Build dedicated sub-models for the Riyadh Metro (~50 stations to ~40 m) and other deep structures, capturing barrier/drain effects and construction dewatering.</li>
<li>Calibrate detailed models after the first monitoring year using PEST++ regularized inversion; document every calibration step and justify any unmet criteria.</li>
<li>Run the preferred scenario and deliver a reliability (uncertainty) analysis reporting P5/P50/P95 predictive bounds.</li>
</ul>
<p></p><p><b>Master Plan, Emulator, Handover &amp; Training</b></p>
<ul>
<li>Produce the 2050 Master Plan: five-year-interval level predictions, critical-area identification, a five-year rolling mitigation project list, and an adaptive management tool.</li>
<li>Deliver the governance-controlled decision-support emulator (stress-only interface on the calibrated model with archived, traceable runs).</li>
<li>Install and test all models and software at the client&rsquo;s head office, verify reproducibility, and train up to five client staff; assess the real-time early-warning system approach.</li>
</ul>
<p></p><p><b>Technical Environment</b></p>
<p>
The delivered stack is open-source and free of license cost:</p>
<ul>
<li><b>Groundwater core: </b>MODFLOW-USG (unstructured grid, Newton solver, CLN package).</li>
<li><b>Automation &amp; coupling:</b> Python / FloPy.</li>
<li><b>Calibration &amp; uncertainty:</b> PEST++ (IES / ENSI ensemble methods).</li>
<li><b>Surface/network:</b> 1D/2D representation within MODFLOW-USG (CLN/DRN/RIV) or an approved coupled code.</li>
<li><b>Deliverable formats:</b> PDF plus editable Word/Excel; GIS/CAD (ArcGIS/AutoCAD, WGS 1984); Primavera schedules.</li>
</ul>
<p></p><p><b>Key Competencies</b></p>
<p><b>
Technical depth</b> &ndash; Independent construction, calibration and validation of regional + nested urban groundwater models in complex carbonate/fractured settings.</p>
<p><b>
Uncertainty</b> &ndash; Fluency in ensemble methods and risk-informed reporting of predictive bounds for decision-making.</p>
<p><b>
Integration </b>&ndash; Ability to couple groundwater with piped-network and overland-flow systems rather than treating recharge as assumed.</p>
<p><b>
Tooling </b>&ndash; Strong Python/FloPy scripting for reproducible, automated, auditable workflows.</p>
<p><b>
Delivery </b>&ndash; Review-ready documentation, adherence to the project sequence, and on time milestone delivery.</p>
<p><b>
Communication </b>&ndash; Client engagement, workshop support, and effective training of non-specialist staff.</p>
<p>
<b>Minimum Qualifications &amp; Experience</b></p>
<p><b>
A minimum of fifteen (15) years of professional experience in regional and nested numerical groundwater modeling is required. Candidates below this threshold will not be considered.</b></p>
<ul>
<li>15+ years delivering regional and nested (parent&ndash;child) groundwater models for government, urban-water, mining or infrastructure projects.</li>
<li>Postgraduate degree (MSc or PhD preferred) in hydrogeology, hydrology, water resources or a closely related discipline.</li>
<li>Demonstrated expertise in MODFLOW-USG (or an approved equivalent): unstructured-grid support, Newton solver, and the Connected Linear Network (CLN) package for 1D pipe/canal coupling.</li>
<li>Proven PEST++ highly-parameterized ensemble calibration and uncertainty analysis (IES / ENSI); reporting predictive uncertainty as P5 / P50 / P95 bounds.</li>
<li>Hands-on Python / FloPy automation for model construction, coupling, batch execution and post-processing across multiple child models.</li>
<li>Direct experience with carbonate, fractured and urban aquifer systems and representing infrastructure leakage and drainage as explicit model stresses.</li>
<li>Experience building governance-controlled emulators / decision-support tools for non specialist users, with protected calibrated parameters and full run auditability.</li>
<li>Track record of client-facing delivery, review-ready model documentation, and training of client staff.</li>
</ul>
<p></p><h3 class="jobSectionHeader"><b>Benefit of Working with Visuna?
</b></h3><p></p><ul><li>A dedicated member of the team responsible for your placements and welfare</li>
<li>Some of the best day rates in the industry</li>
<li>FREE worldwide insurance and Medevac cover whist on a Placement</li>
<li>24/7 access to our specialist support team</li>
<li>Assistance and advice on a range of business topics</li>
<p></p>
<li>FREE access to our Competency Scheme</li>
<li>Increased exposure to potential clients and more placement opportunities</li></ul></div></div></div></div></div></div></div><p></p>

Senior Groundwater Modeler

<div><p>Job Reference: 250335</p><div><br>
</div><div><div><div><p>Upstream
</p></div></div><p></p><div><div><b>Start Date: </b>27/07/2026</div><div><b>
Applications close on: </b>22/07/2026</div><div><b>
Contract Type: </b>Contract</div><div><b>
Country: </b>Bahrain</div><div><b>
Discipline: </b>Reservoir</div><div><b>
Job Contact: </b>laura.hird@visuna.com</div>
</div></div><div></div><div><div><div><div><div><div><p>Location: Bahrain (Onsite)</p>
<p>
Duration: 4 months, extendable based on performance</p>
<p>
Start Date: ASAP</p>
<p>
Seniority: 15+ years of experience</p>
<p>
We are urgently seeking a highly experienced Senior Reservoir Simulation Engineer with strong expertise in gas reservoirs to support ongoing field development and reservoir management activities. The ideal candidate will bring at least 15 years of hands-on experience in simulation, modeling, and performance optimization for gas fields, with a proven track record using Petrel, ECLIPSE, and INTERSECT (FRONTSIM is a plus) . The role requires onsite delivery in Bahrain and the ability to drive results in a fast-paced environment.</p>
<p>
A senior Reservoir Simulation Engineer:</p>
<ul><li>Is a fully qualified professional Reservoir Engineer, with a minimum of Bachelor degree in Petroleum Engineering, but preferably Master and above</li></ul>
<ul><li>Is a professional that can demonstrate in excess of a minimum of 15 years of activity in reservoir Simulation and modeling</li></ul>
<ul><li>Can demonstrate a variety of technical assignments requiring familiarity with a broad field of reservoir Engineering and knowledge of other domains: Petrophysics, Geophysics and modeling</li></ul>
<ul><li>Can demonstrate an intimate knowledge of the subsurface analysis PVT analysis, SCAL modeling and Historical production interpretation.</li></ul>
<p>
Typical activities involve:</p>
<ul><li>Fundamental reservoir engineering analysis including material Balance, DCA and Well forecasting.</li></ul>
<ul><li>PVT analysis for both Black oil and composition simulation including EoS matching.</li></ul>
<ul><li>Relative permeability modeling, normalization and end point scaling</li></ul>
<ul><li>Capillary pressure modeling including hysteresis</li></ul>
<ul><li>History matching using experimental design and AI concept</li></ul>
<ul><li>Basic EOR experience with strong simulation capabilities.</li></ul>
<p>
He/she participates in and works on reservoir studies for clients with the objective of creating history matching models that are suitable for prospect evaluation, dynamic fluid flow simulation and/or well placement planning.</p>
<p>
He/she works in a team environment with petrophysicists, geophysicists and Modeler. Reservoir simulation engineer is the pivot between these disciplines who integrates the Geophysical, Petrophysical and Modelling.</p>
<p>
The Reservoir Simulation Engineer:</p>
<ul><li>Applies broad knowledge and brings experience to identify problems.</li></ul>
<ul><li>Balances priorities and interfaces with internal/external customers to ensure expectations are met within the confines of policies, technical and professional limits.</li></ul>
<ul><li>Makes independent studies, analyses, interpretations and conclusions. Difficult, complex or unusual matters or decisions are usually referred to a more senior authority.</li></ul>
<ul><li>Keeps others informed of actions and reasons behind them.</li></ul>
<p>
Requirements</p>
<p>
Software skills &ndash; Has a proven record of working with Petrel, ECLIPSE and INTERSECT. FRONTSIM is a plus &ndash; knows the Petrel Reservoir Engineering software:</p>
<ul><li>Uncertainty analysis and Optimization</li></ul>
<ul><li>History Matching Analysis</li></ul>
<ul><li>Petrel Upscaling</li></ul>
<p>
Previous Experience and Competencies:</p>
<p>
Education:</p>
<ul><li>Bachelor&rsquo;s Degree, master&rsquo;s degree or other higher Degree in Petroleum / chemical</li></ul>
<p>
engineering or Pure or Applied math.</p>
<ul><li>Preferred: MSc in Petroleum Engineering (areas of specialization included PVT analysis, SCAl</li></ul>
<p>
modeling, History matching and EOR)</p>
<p>
Experience:</p>
<ul><li>BS with minimum 10 years of related experience</li></ul>
<ul><li>MS with minimum 7 years of related experience</li></ul>
<ul><li>PhD with minimum of 5 years of related experience</li></ul>
<p>
Skills and computer literacy:</p>
<p>
Problem Solving</p>
<ul><li>Intermediate to Advanced skill in project estimation</li></ul>
<ul><li>Can handle projects of medium-high complexity</li></ul>
<ul><li>Creative and innovative in providing quality solutions, advanced skills in analysis and design</li></ul>
<p>
of solutions</p>
<ul><li>Expert skill in techniques, tools, processes and practices within area of expertise</li></ul>
<ul><li>Advanced Decision Making: Involved in developing, modifying and executing company</li></ul>
<p>
policies.</p>
<p>
Basic Leadership skills</p>
<ul><li>Contributes to the team/area to optimum performance levels through leadership abilities</li></ul>
<ul><li>Establishes goals in order to meet objectives.</li></ul>
<p>
Communication skills:</p>
<ul><li>Excellent presentation skills</li></ul>
<ul><li>Very good command of the English language, both written and oral.</li></ul>
<ul><li>Advanced oral and written communication skills: Frequently interacts with peer groups,</li></ul>
<ul><li>Good relation: Interaction normally involves the ability to gain confidence, persuade and give</li></ul>
<p>
complex presentations of information concerning specific projects/schedules etc</p>
<ul><li>Customer oriented: actively communicates with internal and/or external customers to</li></ul>
<p>
ensure service level exceeds expectations.</p>
<p>
</p><h3 class="jobSectionHeader"><b>Benefit of Working with Visuna?
</b></h3><p></p><ul><li>A dedicated member of the team responsible for your placements and welfare</li>
<li>Some of the best day rates in the industry</li>
<li>FREE worldwide insurance and Medevac cover whist on a Placement</li>
<li>24/7 access to our specialist support team</li>
<li>Assistance and advice on a range of business topics</li>
<p></p>
<li>FREE access to our Competency Scheme</li>
<li>Increased exposure to potential clients and more placement opportunities</li></ul></div></div></div></div></div></div></div><p></p>

Senior Reservoir Simulation Engineer

<div><p>Job Reference: 251522</p><div><br>
</div><div><div><div><p>Upstream
</p></div></div><p></p><div><div><b>Start Date: </b>01/08/2026</div><div><b>
Applications close on: </b>09/07/2026</div><div><b>
Contract Type: </b>Contract</div><div><b>
Country: </b>Saudi Arabia</div><div><b>
Discipline: </b>Well Testing</div><div><b>
Job Contact: </b>acapplications@visuna.com</div>
</div></div><div></div><div><div><div><div><div><div><p>We are seeking experienced Well Testing Supervisors to support ongoing oil and gas operations in Saudi Arabia. The successful candidates will be responsible for the safe and efficient execution of well testing operations, ensuring compliance with client requirements, operational procedures, and industry best practices. Candidates must possess strong leadership skills and extensive experience managing well testing activities in challenging operational environments, including unconventional oil and gas projects.</p>
<h3 class="jobSectionHeader"><b>
Key Responsibilities</b></h3>
<ul><li>Supervise and coordinate all well testing operations on site.</li>
<li>Ensure all activities are conducted in accordance with company, client, and regulatory HSE standards.</li>
<li>Lead and manage well testing crews during rig-up, testing, flowback, clean-up, and rig-down operations.</li>
<li>Monitor well performance and test parameters, ensuring accurate data collection and reporting.</li>
<li>Liaise with client representatives, drilling, completion, and production teams to ensure operational objectives are achieved.</li>
<li>Review and implement operational procedures, risk assessments, and job safety analyses.</li>
<li>Ensure all well testing equipment is maintained, inspected, and operated safely and efficiently.</li>
<li>Troubleshoot operational issues and implement corrective actions as required.</li>
<li>Prepare daily operational reports and maintain accurate well testing documentation.</li>
<li>Support the training and development of junior personnel on site.</li>
</ul>
<p>Required Qualifications &amp; Experience</p>
<ul>
<li>Proven experience working as a Well Testing Supervisor on onshore and/or offshore projects.</li>
<li>Previous work experience in Saudi Arabia is mandatory.</li>
<li>Demonstrable experience working on Saudi Aramco projects and sites is mandatory.</li>
<li>Strong experience in unconventional oil and gas operations, including shale gas, tight gas, and unconventional reservoirs.</li>
<li>Extensive knowledge of surface well testing equipment, flowback operations, separators, burners, choke manifolds, and associated systems.</li>
<li>Strong understanding of well integrity, pressure control, and operational safety requirements.</li>
<li>Experience managing multicultural crews in remote operational environments.</li>
<li>Excellent communication, leadership, and problem-solving skills.</li>
<li>Ability to work under pressure and manage multiple operational priorities.</li>
</ul>
<p></p><h3 class="jobSectionHeader"><b>Benefit of Working with Visuna?
</b></h3><p></p><ul><li>A dedicated member of the team responsible for your placements and welfare</li>
<li>Some of the best day rates in the industry</li>
<li>FREE worldwide insurance and Medevac cover whist on a Placement</li>
<li>24/7 access to our specialist support team</li>
<li>Assistance and advice on a range of business topics</li>
<p></p>
<li>FREE access to our Competency Scheme</li>
<li>Increased exposure to potential clients and more placement opportunities</li></ul></div></div></div></div></div></div></div><p></p>

Well Testing Supervisor

<div><p>Job Reference: 251524</p><div><br>
</div><div><div><div><p>Upstream
</p></div></div><p></p><div><div><b>Start Date: </b>03/07/2026</div><div><b>
Applications close on: </b>09/07/2026</div><div><b>
Contract Type: </b>Contract</div><div><b>
Country: </b>Saudi Arabia</div><div><b>
Discipline: </b>Sedimentologist</div><div><b>
Job Contact: </b>laura.hird@visuna.com</div>
</div></div><div></div><div><div><div><div><div><div><p><b>Position:</b> Sedimentologist / Geologist &ndash; KMR Project<br>
<b>Location:</b> Al Khafji, Saudi Arabia<br>
<b>Duration:</b> 4 Months<br>
<b>Start Date:</b> ASAP<br>
<b>Experience:</b> 20+ Years</p>
<p></p>
<p>We are seeking an experienced Sedimentologist/Geologist to support the KMR Project. The candidate will be responsible for sedimentological interpretation, facies analysis, well correlation, stratigraphic studies, and development of conceptual depositional models using well, log, and seismic data.</p>
<p></p>
<p><b>Key Responsibilities:</b></p>
<ul>
<li>Construct sedimentological and conceptual depositional models.</li>
<li>Interpret depositional environments and facies distributions for reservoir layers.</li>
<li>Perform well correlation and field-wide stratigraphic framework development.</li>
<li>Analyze wireline log signatures and identify key facies associations.</li>
<li>Interpret seismic sections to identify lateral facies variations and depositional trends.</li>
<li>Prepare stratigraphic correlation sections and marker tables.</li>
<li>Deliver technical reports and presentations.</li>
</ul>
<p></p><ul><li>Degree in Geology, Sedimentology, or related discipline.</li></ul>
<ul><li><b>Minimum 20 years of experience in sedimentology, stratigraphy, and reservoir geology.</b></li></ul>
<ul><li>Strong expertise in facies analysis, well correlation, depositional systems, and seismic integration.</li></ul>
<ul><li>Previous Middle East oil &amp; gas experience is preferred.</li></ul>
<p>
</p><h3 class="jobSectionHeader"><b>Benefit of Working with Visuna?
</b></h3><p></p><ul><li>A dedicated member of the team responsible for your placements and welfare</li>
<li>Some of the best day rates in the industry</li>
<li>FREE worldwide insurance and Medevac cover whist on a Placement</li>
<li>24/7 access to our specialist support team</li>
<li>Assistance and advice on a range of business topics</li>
<p></p>
<li>FREE access to our Competency Scheme</li>
<li>Increased exposure to potential clients and more placement opportunities</li></ul></div></div></div></div></div></div></div><p></p>

Sedimentologist / Geologist

<div><p>Job Reference: 251515</p><div><br>
</div><div><div><div><p>Upstream
</p></div></div><p></p><div><div><b>Start Date: </b>15/07/2026</div><div><b>
Applications close on: </b>30/06/2026</div><div><b>
Contract Type: </b>Contract</div><div><b>
Country: </b>Saudi Arabia</div><div><b>
Discipline: </b>Well Site</div><div><b>
Job Contact: </b>msapplications@visuna.com</div>
</div></div><div></div><div><div><div><div><div><div><p>Our client in Saudi Arabia is looking for a number of Wellsite Leaders for an Project. The successful candidate will be responsible for overseeing and coordinating operations at the wellsite. This role requires strong technical leadership, operational coordination skills, and a deep understanding of high-pressure pumping, stimulation design, and multi-service integration.</p>
<p>
Lead and supervise all wellsite fracturing operations.</p>
<p>
Coordinate integrated services including:</p>
<p>
Hydraulic Fracturing</p>
<p>
Wireline</p>
<p>
Coiled Tubing</p>
<p>
Cementing</p>
<p>
Fluids &amp; Proppant Logistics</p>
<p>
Well Testing (if applicable)</p>
<p>
</p><h3 class="jobSectionHeader"><b>Benefit of Working with Visuna?
</b></h3><p></p><ul><li>A dedicated member of the team responsible for your placements and welfare</li>
<li>Some of the best day rates in the industry</li>
<li>FREE worldwide insurance and Medevac cover whist on a Placement</li>
<li>24/7 access to our specialist support team</li>
<li>Assistance and advice on a range of business topics</li>
<p></p>
<li>FREE access to our Competency Scheme</li>
<li>Increased exposure to potential clients and more placement opportunities</li></ul></div></div></div></div></div></div></div><p></p>

Well Site Leader