OPM/opm-simulators
Nov 2024 – Apr 2026
8 Months active
Languages Used
C++
Technical Skills
C++ DevelopmentCode MaintenanceNumerical MethodsReservoir EngineeringSimulationTypo Correction
Stein Krogstad
PROFILE
Stein Krogstad
Worked extensively on the OPM/opm-simulators repository, delivering features and bug fixes to enhance simulation accuracy, reliability, and maintainability for reservoir engineering workflows. Focus areas included improving group-controlled well updates, implementing robust satellite production and injection handling, and refining numerical methods for intersection and boundary cases. Applied C++ and advanced algorithm design to stabilize edge-case behaviors, prevent division-by-zero errors, and ensure deterministic results in lookup functions. Enhanced code readability and maintainability through targeted refactoring and typo corrections, while increasing logging granularity for better traceability. Demonstrated strong skills in C++ development, simulation programming, code validation, and software debugging throughout the project.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
13Total
Bugs
5
Commits
13
Features
5
Lines of code
774
Activity Months8
Your Network
55 peopleSame Organization
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Shared Repositories
31
Work History
April 2026
2 Commits • 2 Features
Apr 1, 2026Concise monthly summary for 2026-04 focused on OPM/opm-simulators, highlighting delivered features, notable improvements, impact, and skills demonstrated.
2 Commits • 2 Features
Apr 1, 2026Concise monthly summary for 2026-04 focused on OPM/opm-simulators, highlighting delivered features, notable improvements, impact, and skills demonstrated.
April 2026
March 2026
2 Commits
Mar 1, 2026Concise monthly summary for 2026-03 focusing on business value and technical achievements. Highlights: bug fixes in well simulation logic to ensure correct operability status when max_well_status_switch is exceeded and removal of a redundant line that caused a logic error; overall impact includes more reliable simulations, reduced defect risk, and easier maintenance; technologies/skills demonstrated include debugging practices, code cleanup, and regression validation in the well simulation module.
March 2026
2 Commits
Mar 1, 2026Concise monthly summary for 2026-03 focusing on business value and technical achievements. Highlights: bug fixes in well simulation logic to ensure correct operability status when max_well_status_switch is exceeded and removal of a redundant line that caused a logic error; overall impact includes more reliable simulations, reduced defect risk, and easier maintenance; technologies/skills demonstrated include debugging practices, code cleanup, and regression validation in the well simulation module.
October 2025
1 Commits
Oct 1, 2025Month: 2025-10 — This month focused on stabilizing lookup boundary behavior in the OPM/opm-simulators, delivering a critical bug fix that enhances reliability and data integrity for simulations. The change ensures deterministic results for boundary cases and reduces edge-case risk in downstream analytics.
1 Commits
Oct 1, 2025Month: 2025-10 — This month focused on stabilizing lookup boundary behavior in the OPM/opm-simulators, delivering a critical bug fix that enhances reliability and data integrity for simulations. The change ensures deterministic results for boundary cases and reduces edge-case risk in downstream analytics.
October 2025
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025 delivered satellite injection capabilities in the OPM simulators with a focus on correctness, validation, and maintainability. The work path included a refactor of satellite production and injection rate handling to ensure proper rank-0 processing, updates to validation keywords for satellite injection, and safeguards to prevent parent groups controlled by RESV or VREP (recursive for production and injection). The changes are backed by two commits that introduced satellite injection and production updates, followed by a squash of commits to streamline history.
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025 delivered satellite injection capabilities in the OPM simulators with a focus on correctness, validation, and maintainability. The work path included a refactor of satellite production and injection rate handling to ensure proper rank-0 processing, updates to validation keywords for satellite injection, and safeguards to prevent parent groups controlled by RESV or VREP (recursive for production and injection). The changes are backed by two commits that introduced satellite injection and production updates, followed by a squash of commits to streamline history.
August 2025
1 Commits • 1 Features
Aug 1, 2025Month 2025-08 — Well Group Simulation Enhancement delivered in OPM/opm-simulators, improving accuracy and robustness for satellite production in reduction-rate calculations, and adding a division-by-zero safeguard in the fraction calculator when potentials are zero. The changes enhance multi-well planning fidelity and reduce risk of erroneous results in production scenarios, supporting better asset development decisions.
1 Commits • 1 Features
Aug 1, 2025Month 2025-08 — Well Group Simulation Enhancement delivered in OPM/opm-simulators, improving accuracy and robustness for satellite production in reduction-rate calculations, and adding a division-by-zero safeguard in the fraction calculator when potentials are zero. The changes enhance multi-well planning fidelity and reduce risk of erroneous results in production scenarios, supporting better asset development decisions.
August 2025
April 2025
1 Commits
Apr 1, 2025April 2025 monthly summary: Implemented a robustness improvement for IPR intersection extrapolation in OPM/opm-simulators, addressing edge-case behavior when the IPR line lies above all tabulated values. The change enhances stability of intersection calculations for flo and bhp, reducing the risk of instability in extreme scenarios and increasing reliability of reservoir simulations. The update is tracked under commit 983175aa49221275b7c8ec8f3d3da335bcfef65d.
April 2025
1 Commits
Apr 1, 2025April 2025 monthly summary: Implemented a robustness improvement for IPR intersection extrapolation in OPM/opm-simulators, addressing edge-case behavior when the IPR line lies above all tabulated values. The change enhances stability of intersection calculations for flo and bhp, reducing the risk of instability in extreme scenarios and increasing reliability of reservoir simulations. The update is tracked under commit 983175aa49221275b7c8ec8f3d3da335bcfef65d.
January 2025
1 Commits
Jan 1, 2025January 2025: Core stability improvements in OPM/opm-simulators with a critical bug fix to computeWellPotentialsImplicit. The fix ensures the function uses the provided well_state directly, removing a potentially copied state from the simulator and guaranteeing consistent and accurate potential calculations. This enhances reproducibility and reliability of simulations, supporting downstream analytics and decision-making. No new user-facing features were released this month; the work strengthens the foundation for future features. Key technologies demonstrated include robust state handling, careful memory management to prevent state drift, and disciplined Git version control (commit 21bed9e9533884cd2e8dda0916b983b72880a0db).
1 Commits
Jan 1, 2025January 2025: Core stability improvements in OPM/opm-simulators with a critical bug fix to computeWellPotentialsImplicit. The fix ensures the function uses the provided well_state directly, removing a potentially copied state from the simulator and guaranteeing consistent and accurate potential calculations. This enhances reproducibility and reliability of simulations, supporting downstream analytics and decision-making. No new user-facing features were released this month; the work strengthens the foundation for future features. Key technologies demonstrated include robust state handling, careful memory management to prevent state drift, and disciplined Git version control (commit 21bed9e9533884cd2e8dda0916b983b72880a0db).
January 2025
November 2024
3 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary: Focused delivery in the OPM/opm-simulators repository on improving accuracy and safety of group-controlled well updates within Blackoil models, alongside small readability improvements. The work delivered strengthens injection/production group constraint handling, enhances predictability of updates, and maintains code readability and maintainability.
November 2024
3 Commits • 1 Features
Nov 1, 2024November 2024 monthly summary: Focused delivery in the OPM/opm-simulators repository on improving accuracy and safety of group-controlled well updates within Blackoil models, alongside small readability improvements. The work delivered strengthens injection/production group constraint handling, enhances predictability of updates, and maintains code readability and maintainability.
Activity
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Quality Metrics
Correctness87.6%
Maintainability84.6%
Architecture84.6%
Performance77.6%
AI Usage21.6%
Skills & Technologies
Programming Languages
C++
Technical Skills
C++C++ DevelopmentC++ developmentC++ programmingCode MaintenanceCode ValidationNumerical AnalysisNumerical ComputingNumerical MethodsReservoir EngineeringScientific ComputingSimulationSoftware EngineeringTypo Correctionalgorithm design
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