What is neqsim-olga-multiphase-simulator?

A Python-based runner and results reader for OLGA, a licensed simulator that models changing flows of oil, gas, and water through pipes. It can connect OLGA runs with fluid and hydrate data from NeqSim.

Use it to locate OLGA, prepare required tables, validate and launch cases, run parameter sweeps, decode exit codes, and read trend and profile results.

It helps run existing OLGA cases reproducibly, diagnose failed runs, and extract results without operating the simulator manually through its graphical interface.

neqsim-olga-multiphase-simulator — Skill for Claude Code and Codex by

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add equinor/neqsim-community-skills --skill olga-multiphase-simulator

Clone the repo

git clone --depth 1 https://github.com/equinor/neqsim-community-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/olga-multiphase-simulator/github.svg)](https://agentmods.dev/skills/equinor/neqsim-community-skills/olga-multiphase-simulator)

Your own site

<a href="https://agentmods.dev/skills/equinor/neqsim-community-skills/olga-multiphase-simulator"><img src="https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/olga-multiphase-simulator/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/equinor/neqsim-community-skills/olga-multiphase-simulator"><img src="https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/olga-multiphase-simulator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 174 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 17,301 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00174	$0.17301
Opus 5	$0.00087	$0.08650
Sonnet 5	$0.00035	$0.03460
Haiku 4.5	$0.00017	$0.01730

Measured 7d ago against content hash 6198b5aa6e2d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

neqsim-olga-multiphase-simulator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

The scan reads SKILL.md. This mod also ships 13 executable files (examples/run_olga_case.py, src/olga_multiphase_simulator/__init__.py, src/olga_multiphase_simulator/discovery.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/flow-assurance/olga-multiphase-simulator/SKILL.md · 1,054 lines

How it starts

The opening of the file, as written. The whole thing — 1,054 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OLGA Multiphase Flow Simulator

OLGA (SLB) is a transient one-dimensional three-phase pipe-flow simulator. It is the industry reference for slug tracking, terrain slugging, shut-in and restart, blowdown, liquid surge to a receiving facility, hydrate and wax management, well clean-up and drilling hydraulics.

This skill is the execution and post-processing layer: how to find the installed OLGA, validate a case cheaply, launch the batch engine correctly, understand why it stopped, and read its results into Python. It does not teach you how to build a flow-assurance model from nothing, and it never replaces a qualified flow-assurance review.

OLGA is licensed commercial software. This skill assumes the user already has a valid installation and licence; it only drives what is installed locally.

When to Use

A task must run an existing OLGA case and extract numbers from the results.
An OLGA case needs a PVT table or a hydrate equilibrium curve generated from a NeqSim fluid, so that OLGA and NeqSim share one fluid and one hydrate boundary.
A parametric or sensitivity sweep must be run reproducibly rather than by hand in the GUI.
An OLGA run failed and the exit code, log or licence state must be diagnosed.
OLGA results must be compared against NeqSim screening or pipeline models.

Do not use this skill to invent a case from scratch, to guess PVT tables, or to interpret a transient result without a flow-assurance engineer in the loop.

Inputs

case: path to the .genkey / .key keyword file the batch engine reads. The GUI .opi project is not an engine input — generate the genkey from it first.
pvt_file: the .tab PVT table referenced by FILES PVTFILE=, resolved relative to the working directory. Generated from a NeqSim fluid (two- or three-phase) so OLGA and NeqSim share one fluid.
hydrate_curve: optional hydrate equilibrium curve for HYDRATECHECK, also generated from the same NeqSim fluid.
restart_file: optional .rsw snapshot for a restart (RESTART READFILE=ON).
parameters: mapping of {KEYWORD: {ATTRIBUTE: value}} overrides applied by apply_parameters / set_parameter / write_variant for sweeps, e.g. {"INTEGRATION": {"ENDTIME": "6 h"}}.
out_dir: output directory for the run (-outDir); defaults to the case directory.
nthreads: thread count for parallel execution (-nthreads).
timeout: wall-clock limit in seconds after which the run is terminated.
olga_home / olga_engine: optional explicit installation or engine path; otherwise OLGA_HOME / OLGA_ENGINE or installation discovery is used.
Licence environment: LM_LICENSE_FILE or SLBSLS_LICENSE_FILE, plus a reachable licence server when the licence is served rather than node-locked.

Read the full file on GitHub · 1,054 lines

Files

What ships with it

15 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

7d ago Changed · +40 lines 6198b5aa6e2d
11d ago First seen · 1,014 lines · 174 tokens per session scan A c2cd14014a39

Subscribe to this mod's changes

neqsim-olga-multiphase-simulator is a skill published in the GitHub repository equinor/neqsim-community-skills (2 stars, last pushed today), licensed Apache-2.0. It adds 174 tokens to every session and 17,301 once invoked, about $0.0009 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Languages Python Scientific batch flow-assurance multiphase olga simulator slugging transient

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