# Market evidence report — mud-logger

Source: **58 real job ads** (JSearch API, countries: us 50, gb 8), extracted into the MSSQL evidence store; as of 2026-07-18.
This report contains extracted, aggregated facts only — no ad text is
reproduced (copyright / platform terms).

## Seniority distribution

| Seniority | Ads | Share |
|---|---|---|
| mid | 38 | 66 % |
| junior | 12 | 21 % |
| n/a | 8 | 14 % |

## Tools — full market ranking

| # | Item | Ads | Share |
|---|---|---|---|
| 1 | Microsoft Excel | 14 | 24 % |
| 2 | chromatography equipment | 4 | 7 % |
| 3 | geological software | 4 | 7 % |
| 4 | Microsoft SharePoint | 4 | 7 % |
| 5 | Microsoft Teams | 4 | 7 % |
| 6 | Microsoft Word | 3 | 5 % |

## Hard skills — full market ranking

| # | Item | Ads | Share |
|---|---|---|---|
| 1 | data analysis | 14 | 24 % |
| 2 | mud logging | 14 | 24 % |
| 3 | data acquisition | 13 | 22 % |
| 4 | geological data collection | 11 | 19 % |
| 5 | chromatography | 9 | 16 % |
| 6 | equipment maintenance | 9 | 16 % |
| 7 | gas monitoring | 9 | 16 % |
| 8 | geological data analysis | 9 | 16 % |
| 9 | drill cutting analysis | 7 | 12 % |
| 10 | gas analysis | 7 | 12 % |
| 11 | geological monitoring | 7 | 12 % |
| 12 | hydrocarbon extraction | 7 | 12 % |
| 13 | cuttings analysis | 6 | 10 % |
| 14 | data reporting | 6 | 10 % |
| 15 | drilling parameter monitoring | 6 | 10 % |
| 16 | cuttings description | 5 | 9 % |
| 17 | hydrocarbon detection | 5 | 9 % |
| 18 | hydrocarbon extraction analysis | 5 | 9 % |
| 19 | lithology identification | 5 | 9 % |
| 20 | log generation | 5 | 9 % |
| 21 | chemistry | 4 | 7 % |
| 22 | geological data monitoring | 4 | 7 % |
| 23 | geology | 4 | 7 % |
| 24 | rock sample description | 4 | 7 % |
| 25 | data collection | 3 | 5 % |
| 26 | drilling theory | 3 | 5 % |
| 27 | equipment calibration | 3 | 5 % |
| 28 | lithology analysis | 3 | 5 % |
| 29 | math | 3 | 5 % |
| 30 | mineralogy identification | 3 | 5 % |
| 31 | mud logging techniques | 3 | 5 % |
| 32 | mud property monitoring | 3 | 5 % |
| 33 | stratigraphic information logging | 3 | 5 % |
| 34 | troubleshooting | 3 | 5 % |

## Methods — full market ranking

| # | Item | Ads | Share |
|---|---|---|---|
| 1 | real-time surveillance | 6 | 10 % |
| 2 | geosteering | 5 | 9 % |

## Responsibilities — full market ranking

| # | Item | Ads | Share |
|---|---|---|---|
| 1 | equipment maintenance | 18 | 31 % |
| 2 | equipment calibration | 10 | 17 % |
| 3 | data collection | 8 | 14 % |
| 4 | cuttings collection | 7 | 12 % |
| 5 | data documentation | 7 | 12 % |
| 6 | hazard identification | 7 | 12 % |
| 7 | drilling parameter monitoring | 6 | 10 % |
| 8 | geological data collection | 6 | 10 % |
| 9 | collaboration with engineers | 5 | 9 % |
| 10 | communication with geologists and engineers | 5 | 9 % |
| 11 | report delivery | 5 | 9 % |
| 12 | data analysis | 4 | 7 % |
| 13 | data monitoring | 4 | 7 % |
| 14 | drilling parameter surveillance | 4 | 7 % |
| 15 | log generation | 4 | 7 % |
| 16 | monitoring geological data | 4 | 7 % |
| 17 | report preparation | 4 | 7 % |
| 18 | client communication | 3 | 5 % |
| 19 | cuttings gathering | 3 | 5 % |
| 20 | mud log creation | 3 | 5 % |
| 21 | remote work | 3 | 5 % |
| 22 | rig down | 3 | 5 % |
| 23 | rig up | 3 | 5 % |
| 24 | sample collection | 3 | 5 % |
| 25 | sample integrity assurance | 3 | 5 % |
| 26 | sample preparation | 3 | 5 % |

## Regional breakdown

> **Corpus note:** 58 relevant ads in total — below the 100-ad target for a fully reliable ranking. Percentages above should be read as indicative.

### US (us)

50 ads.

**Top hard skills:**

- data analysis — 28 % (14 ads)
- data acquisition — 26 % (13 ads)
- mud logging — 22 % (11 ads)
- chromatography — 18 % (9 ads)
- equipment maintenance — 18 % (9 ads)
- gas monitoring — 18 % (9 ads)
- geological data analysis — 18 % (9 ads)
- drill cutting analysis — 14 % (7 ads)
- gas analysis — 14 % (7 ads)
- geological monitoring — 14 % (7 ads)

**Top tools:**

- Microsoft Excel — 28 % (14 ads)
- chromatography equipment — 8 % (4 ads)
- geological software — 8 % (4 ads)
- Microsoft SharePoint — 8 % (4 ads)
- Microsoft Teams — 8 % (4 ads)
- Microsoft Word — 6 % (3 ads)
- data analysis tools — 4 % (2 ads)
- Flame Ionization Detection (FID) — 4 % (2 ads)
- Mass Spectrometry — 4 % (2 ads)
- mudlogging software — 4 % (2 ads)

**Seniority:** mid 76 % · n/a 14 % · junior 10 %

### UK (gb)

**Insufficient evidence** — 8 ads (minimum for a regional ranking: 30). No ranking is reported for this region.

### EU/DACH (de, at, ch, nl)

**Insufficient evidence** — 0 ads (minimum for a regional ranking: 30). No ranking is reported for this region.


## Job title variants in the market

| Title | Ads |
|---|---|
| Mud Logger | Permian Basin | 5 |
| Mud Logger | 3 |
| Mud Logging Geologist | 3 |
| OKLAHOMA MUD LOGGER | 3 |
| Trainee Mudlogger - Entry Level Oil and Gas | 3 |
| Aberdeen - Logging Geologist-SDL, II | 2 |
| GSS Mud Logging Analyst | 2 |
| Junior Mud Logger Geologist | 2 |
| Mud Logger | Entry Level and Experienced | 2 |
| On-Site Mud Logging Technician — Mexico | 2 |
| Wellsite Geologist/Mudlogger | 2 |
| EAST TEXAS MUD LOGGER | 1 |
| Field Geologist & Mudlogger at Remote Well Sites | 1 |
| Field Logging Geologist | 1 |
| Field Logging Geologist – SDL II; Data & Drilling | 1 |
| Field Logging Geologist (SDL II) - Entry-Level | 1 |
| Field Mud Logger – Real-Time Geology Data | 1 |
| Field Mud Logger: Real-Time Wellbore Insights | 1 |
| Logging Geologist | 1 |
| Logging Geologist SDL II | 1 |
| Mud Logger / Mudlogging Technician – East Texas And Louisiana | 1 |
| Mud Logger / Mudlogging Technician – New Mexico | 1 |
| Mud Logger / Mudlogging Technician – Oklahoma | 1 |
| Mud Logger / Mudlogging Technician – Permian And Delaware Basin | 1 |
| Mud Logger/Well-Site Geologist | 1 |

Methodology: entities extracted per ad ({hard_skills, tools, methods, responsibilities, seniority}), normalized, counted as DISTINCT ads per entity; report threshold ≥ 3 ads. Headline sections in skills.md/tools.md use the stricter ≥ 20 % threshold.