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Reservoir Studies & FDP
Simulation-based reservoir studies, history matching and prediction, reserves estimation and field development planning support — including EOR/IOR screening for mature assets.
Advisory Petroleum Engineer Manager · KNOC, Ulsan
Petroleum engineering tools that run in your browser.
16+ years of international E&P across the US, Vietnam, the UK, Canada, Kazakhstan, Peru and Iraq — integrating reservoir, production and artificial lift. I build the tools I wanted on those projects and give them away: single HTML files, no install, no server, your data never leaves your machine.
16+Years in international E&P
7Countries in project scope
3Free tools online
EN / KOBilingual delivery
01 — About
Subsurface engineering, and the software it deserves.
I'm a Petroleum Engineer Manager in the American & Europe Technology Team at Korea National Oil Corporation, working across international asset evaluation, reservoir simulation, reserves and field development planning, EOR/IOR and new ventures. My work has covered complex reservoirs — fractured basement, gas-condensate, tight gas, heavy oil and carbonates.
For three and a half years I was seconded from KNOC to Cuu Long JOC in Vietnam and sat on the operations side, bridging reservoir engineering and production: ESP and artificial lift optimisation, production surveillance, well interventions, and gas-condensate allocation. That is where the habit started — every diagnostic run ended with a folder of gauge files and an afternoon in Excel, so I began building the tools instead.
The tool does the arithmetic. What decides the answer is pressure data quality and an understanding of that specific field's drive mechanism — and neither of those can be automated away.
I'm currently extending this into AI/ML and digital reservoir engineering — not to have a model produce the answer, but to make the engineer's judgement easier: surface the other matches that fit the data equally well, and make sure nothing plausible went unconsidered.
Reservoir SimulationReserves & FDPEOR / IORFractured BasementGas-CondensateTight Gas · Heavy OilCarbonatesESP / Artificial LiftProduction OptimizationTechnical Due DiligenceAI / ML
02 — Petroleum Service
Tools & information services
Free engineering tools built on standard physics, with the assumptions written out in full. Each one is a single HTML file — it works offline, straight from disk, and nothing you load is ever uploaded anywhere.
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Material Balance by Joo
Black-oil and dry-gas (p/z) modes with Havlena–Odeh straight line, five aquifer models (Pot · Schilthuis · Fetkovich · Carter–Tracy), drive index breakdown, Campbell and Cole diagnostics, multi-tank Newton solution and Nelder–Mead history matching. EN/KO manuals included.
● Live — mb-joo.vercel.app◺
Gas Lift Diagnosis
Plots gauge pressure and temperature against depth, and handles valve design, casing pressure and shut-in fluid level. Turns a folder of gauge text files into a diagnostic plot without the afternoon in Excel.
● Live — gas-lift-diagnosis▦
UK North Sea Production Viewer
416,000 monthly records from 4,265 wells across 268 UK fields — 25 years of open NSTA data rebuilt into something you can actually browse, filter and plot well by well.
● Live — uk-field-info.vercel.app₩
Asset Evaluation & Due Diligence
Technical and commercial evaluation of international E&P opportunities: data room review, independent reserves opinion, and production performance assessment for investment decisions.
Advisory✎
Technical Notes
Write-ups on what the tools are actually doing and where they break — material balance non-uniqueness, pressure data quality, and what AI can and cannot decide for a reservoir engineer.
Articles →03 — Experience
Sixteen years of international E&P projects
Petroleum Engineer Manager
Korea National Oil Corporation · American & Europe Technology Team
International Asset Evaluation · Reservoir Simulation · FDP & Reserves · EOR/IOR · New Ventures · AI/ML
- 16+ years of international reservoir engineering and asset evaluation across the US, Vietnam, the UK, Canada, Kazakhstan, Peru and Iraq.
- Complex reservoir experience: fractured basement, gas-condensate, tight gas, heavy oil and carbonate.
- Delivered integrated reservoir simulation, reserves, FDP, EOR/IOR and production performance evaluations supporting major investment and development decisions.
- Technical due diligence, data room reviews and commercial/technical evaluation of international E&P opportunities.
- Currently expanding into AI/ML and digital reservoir engineering, integrating advanced analytics with conventional reservoir engineering.
Senior Petroleum Engineer
Cuu Long Joint Operating Company — seconded from KNOC
Subsurface–Operations Integration · Artificial Lift & Reservoir Management · Production Optimization · JV Partner Coordination
- Bridged reservoir engineering and operations, using simulation and production engineering to optimise field performance.
- Led artificial lift and ESP optimisation, integrating reservoir pressure management, well modelling and production analysis.
- Managed production surveillance, well interventions and gas-condensate field allocation to improve reliability and recovery.
- Served as JV partner representative, coordinating technical and operational decisions between CLJOC, partners and KNOC headquarters.
B.Eng, Natural Resources Engineering · BBA, Business Administration
Dong-A University
04 — Contact
Found a bug? Want a feature?
If a tool gives you a result that looks wrong, tell me and I'll fix it as fast as I can. If there's a feature you want, I'll build it.
- Email nasel777@gmail.com
- LinkedIn linkedin.com/in/hsjoo1307
- Location Ulsan, Republic of Korea