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neqsim-produced-water-scale-screening

neqsim-produced-water-scale-screening is a skill for Claude Code, Codex from equinor/neqsim-community-skills. It costs 92 tokens per session (2,170 once invoked), scanned A, original, Apache-2.0.

A produced-water analysis tool that turns ion measurements, preset brines, or total dissolved solids into a NeqSim fluid description. It also gives an initial check for mineral scale and incompatibility when waters are mixed.

In plain words
What is it for?
Use it to prepare oilfield water for NeqSim, check charge balance, screen scale risk, and assess whether injected and formation waters may react badly when combined.
Why use it?
It removes the manual work of converting water reports into simulation inputs and provides an early warning of possible deposits such as barite, gypsum, and calcite. The results are screening estimates, not a substitute for validated design calculations.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 4repo 4d ago A scan 92 tokens original Apache-2.0

Good fit Use it to prepare oilfield water for NeqSim, check charge balance, screen scale risk, and assess whether injected and formation waters may react badly when combined.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/equinor/neqsim-community-skills/neqsim-produced-water-scale-screening
View source ↗ equinor/neqsim-community-skills equinor.github.io
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 neqsim-produced-water-scale-screening
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.

agentmods badge for neqsim-produced-water-scale-screening

README.md
[![agentmods](https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/neqsim-produced-water-scale-screening/github.svg)](https://agentmods.dev/skills/equinor/neqsim-community-skills/neqsim-produced-water-scale-screening)
Your own site
<a href="https://agentmods.dev/skills/equinor/neqsim-community-skills/neqsim-produced-water-scale-screening"><img src="https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/neqsim-produced-water-scale-screening/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.

agentmods 80×15 button for neqsim-produced-water-scale-screening

Your own site · 80×15
<a href="https://agentmods.dev/skills/equinor/neqsim-community-skills/neqsim-produced-water-scale-screening"><img src="https://agentmods.dev/badge/skills/equinor/neqsim-community-skills/neqsim-produced-water-scale-screening.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 92 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,170 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00092 $0.02170
Opus 5.5 $0.00037 $0.00868
Sonnet 5.5 $0.00018 $0.00434
Haiku 4.5 $0.00009 $0.00217

Measured 1mo ago against content hash 377f1ec49707, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

neqsim-produced-water-scale-screening 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 1mo ago.

The scan reads SKILL.md. This mod also ships 7 executable files (examples/scale_screening_demo.py, src/produced_water_scale_screening/__init__.py, src/produced_water_scale_screening/builder.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/neqsim-produced-water-scale-screening/SKILL.md · 150 lines

How it starts

The opening of the file, as written. The whole thing — 150 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Produced Water Scale Screening

Use this skill to build a normalized produced-water (brine) description from an ion analysis, a built-in preset, or a single total-dissolved-solids value; check its charge balance; and emit a NeqSim-ready ion mapping for neqsim.thermo.util.ProducedWaterFluidBuilder. It also computes screening-level scale saturation indices, a two-water mixing-incompatibility sweep, and informational CO2/H2S corrosion flags. It is intentionally simple and should guide users toward validated NeqSim electrolyte-CPA scale calculations for real work.

When to Use

  • When a user wants to convert a water analysis into a NeqSim electrolyte fluid input.
  • When a user asks which oilfield scales (barite, celestite, gypsum/anhydrite, calcite) a water tends to form.
  • When screening seawater-injection or commingling incompatibility (formation-water Ba/Sr meeting injected SO4).
  • When an agent should explain that validated NeqSim methods are required for design-grade scale and inhibitor work.

Inputs

  • ions_mg_l: explicit ion concentrations in mg/L (e.g. Na+, Cl-, Ca++, Mg++, Ba++, Sr++, SO4--, HCO3-).
  • preset: one of seawater, formation_water_high_ba, brackish.
  • tds_mg_l: total dissolved solids in mg/L (modelled as pure NaCl).
  • temperature_c: temperature in C (default 25.0).
  • pressure_bara: pressure in bara (default 1.0).
  • ph: optional in-situ pH (required for calcite screening).
  • For corrosion flags: co2_mol_percent, h2s_mol_percent of the associated gas.

Exactly one of ions_mg_l, preset, or tds_mg_l must be supplied to build.

Outputs

  • tds_mg_l: sum of ion concentrations in mg/L.
  • molality: ion molality in mol/kg.
  • ionic_strength_mol_kg: brine ionic strength in mol/kg.
  • charge_balance_error_pct: cation-anion imbalance as a percentage.
  • neqsim_components: mole-fraction mapping of water + ions for the NeqSim builder.
  • neqsim_available: whether the optional NeqSim package is importable.
  • ScaleResult.saturation_index: log10(IAP/Ksp) per mineral; >0 means supersaturation.
  • ScaleResult.risk / MixIncompatibility.risk: low, moderate, high, or unknown.
  • MixIncompatibility.worst_fraction_a / worst_saturation_index: worst blend point.
  • corrosion_flags: human-readable CO2/H2S screening flags.
  • warnings: non-fatal screening warnings (charge balance, ionic-strength validity, unsupported ions).

Read the full file on GitHub · 150 lines

Files

What ships with it

9 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.

  1. 1mo ago First seen · 150 lines · 92 tokens per session scan A 377f1ec49707

Subscribe to this mod's changes

neqsim-produced-water-scale-screening is a skill published in the GitHub repository equinor/neqsim-community-skills (4 stars, last pushed 4d ago), licensed Apache-2.0. It adds 92 tokens to every session and 2,170 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-09-19.

Scientific
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