# 📐  L2 Spec — Reservoir History Matching — Nominal + Mismatch Specs

**ID:** `L2-460-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-460`](/artifact/l1/L1-460)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41555282

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| N cells | — | 1000 – 500000 |
| N wells | — | 5 – 100 |
| N ensemble | — | 50 – 1000 |
| Production years | — | 5 – 60 |

## 2. Tolerance (ε)

**Type:** `fn`

```
0.08 + 0.02 * (50000 / N_cells) ** 0.2
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |

## 4. Fingerprint

`2d56bc9f8ceb922a220d277334bd8c7f1bfde312d9cc68e26d3f51e86e39f766`

## 5. On-chain Registration

- **Chain hash:** `0xc28ef879dfb1a8a785f9050e2764f5ca85203394f004f541028a0821355d00a4`
- **Chain tx hash:** `0x19c6cddf403347ecde0d1b90575158f9fb52f92c5f7bf8597ba8e11599f7c896`
- **Chain block:** `41555282`

---

## File Mapping

This bundle consists of: `L2-460-001.md`, `L2-460-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-460-001.md` | Source of truth — edit this | Human or LLM |
| `L2-460-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |

**Prompt for your LLM after editing this Markdown:**

> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.

_This Markdown was auto-synthesized from the catalog row for `L2-460-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._