neqsim-electrolyte-systems SKILL.md skillA
neqsim-electrolyte-systems from equinor/neqsim is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add equinor/neqsim/neqsim-electrolyte-systems@git:20261025.a8b03b7Pins git:20261025.a8b03b7 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- equinor/neqsim
- Path
.github/skills/neqsim-electrolyte-systems/SKILL.md- Versions recorded
- 8
- Latest version
- git:20261025.a8b03b7, committed Oct 25, 2026
- First version recorded
- Jul 9, 2026
- Size
- 16,201 bytes
- Repository stars
- 167
- License
- Apache-2.0
Electrolyte and brine chemistry guidance for NeqSim. USE WHEN: modeling produced water, scale prediction, CO2/H2S in aqueous systems, MEG/DEG injection, hydrate inhibitor dosing, or any system with ions, salts, or electrolytes. Covers SystemElectrolyteCPAstatoil setup, ion components, scale risk assessment, and brine handling patterns.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Electrolyte Systems Guide
Guide for modeling electrolyte/brine systems in NeqSim.
## When to Use Electrolyte Models
- Produced water with dissolved salts (NaCl, CaCl2, BaCl4)
- Scale prediction (CaCO3, BaSO4, CaSO4)
- CO2/H2S solubility in brines
- MEG injection rate calculations
- Hydrate inhibitor dosing
- Seawater injection and mixing
- Desalination process modeling
## EOS Selection for Electrolyte Systems
| System | NeqSim Class | Mixing Rule |
|--------|-------------|-------------|
| Water + salt + HC gas | `SystemElectrolyteCPAstatoil` | `10` |
| MEG/DEG + water + gas | `SystemSrkCPAstatoil` | `10` |
| Pure water + gas | `SystemSrkCPAstatoil` | `10` |
| Brine + multiple salts | `SystemElectrolyteCPAstatoil` | `10` |
## Basic Electrolyte Setup
### Pitzer hydrate and mixed-chloride route
For Pitzer water activities use `SystemPitzer` with `setMixingRule("classic")` and
`setMultiPhaseCheck(true)`. The hydrate onset temperature/pressure/curve operations use
`PitzerHydrateFlash` and a matched liquid-water reference. See
`docs/thermo/pitzer_hydrate_equilibrium.md` for the tested setup and limits.
…Read the whole file at its exact version.
How to install
mdr add equinor/neqsim/neqsim-electrolyte-systems@sha256:95a916faa3984f1dThe line at the top of this page pins the label git:20261025.a8b03b7, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_g7l4vrpiy7hgjdz3)
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Versions
The registry has recorded 8 versions of this file, between Jul 9, 2026 and Oct 25, 2026, about one every 15 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261025.a8b03b7 latest | 2026-10-25 | a8b03b7 | 16,201 B | A | view · diff |
| git:20260909.ee76427 | 2026-09-09 | ee76427 | 15,451 B | A | view · diff |
| git:20260907.9ca9ea2 | 2026-09-07 | 9ca9ea2 | 13,798 B | A | view · diff |
| git:20260906.234214c | 2026-09-06 | 234214c | 13,331 B | A | view · diff |
| git:20260902.79b8408 | 2026-09-02 | 79b8408 | 13,063 B | A | view · diff |
| git:20260901.3f2b733 | 2026-09-01 | 3f2b733 | 11,955 B | A | view · diff |
| git:20260711.5769e6b | 2026-07-11 | 5769e6b | 9,448 B | A | view · diff |
| git:20260709.80eda83 | 2026-07-09 | 80eda83 | 7,771 B | A | view |
Audit of the latest version
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- pass: Frontmatter declares a description
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- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
equinor/neqsim · 167 stars · license Apache-2.0 · pushed 2026-11-08 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_g7l4vrpiy7hgjdz3 GET https://markdownregistry.com/api/v1/resolve?ref=equinor/neqsim/neqsim-electrolyte-systems GET https://markdownregistry.com/api/v1/blob/95a916faa3984f1d7452538bd4580149414b35591f0afeb48c8047d24978dd3f
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