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Lithology sequence benchmark: logs, reference intervals, config

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  1. README.md +164 -0
  2. curve_specs.json +320 -0
  3. data/depthwise/test.parquet +3 -0
  4. data/depthwise/train.parquet +3 -0
  5. data/depthwise/validation.parquet +3 -0
  6. data/intervals/test.parquet +3 -0
  7. data/intervals/train.parquet +3 -0
  8. data/intervals/validation.parquet +3 -0
  9. data/logs/test.parquet +3 -0
  10. data/logs/train.parquet +3 -0
  11. data/logs/validation.parquet +3 -0
  12. data/wells.parquet +3 -0
  13. label_config.json +395 -0
  14. manifest.json +29 -0
README.md ADDED
@@ -0,0 +1,164 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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+ ---
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+ license: other
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+ pretty_name: Lithology Sequence Identification Benchmark
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+ task_categories:
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+ - other
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+ tags:
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+ - geology
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+ - geoscience
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+ - well-logs
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+ - petrophysics
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+ - lithology
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+ - LAS
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+ - benchmark
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+ configs:
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+ - config_name: logs
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+ data_files:
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+ - split: train
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+ path: data/logs/train.parquet
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+ - split: validation
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+ path: data/logs/validation.parquet
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+ - split: test
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+ path: data/logs/test.parquet
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+ - config_name: intervals
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+ data_files:
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+ - split: train
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+ path: data/intervals/train.parquet
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+ - split: validation
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+ path: data/intervals/validation.parquet
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+ - split: test
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+ path: data/intervals/test.parquet
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+ - config_name: depthwise
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+ data_files:
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+ - split: train
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+ path: data/depthwise/train.parquet
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+ - split: validation
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+ path: data/depthwise/validation.parquet
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+ - split: test
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+ path: data/depthwise/test.parquet
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+ - config_name: wells
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+ data_files:
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+ - split: train
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+ path: data/wells.parquet
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+ ---
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+
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+ <div align="center">
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+
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+ <img src="https://i.ibb.co/0VJCC9Gf/IMG-20260114-WA0008.jpg" alt="NORA Research Lab" width="160"/>
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+
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+ # <img src="https://i.ibb.co/0VJCC9Gf/IMG-20260114-WA0008.jpg" alt="NORA" width="28"/> Lithology Sequence Identification Benchmark
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+
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+ **Predict the lithological sequence of a whole well from raw wireline logs**
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+
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+ [![GitHub](https://img.shields.io/badge/GitHub-Nora--Research--Lab-181717?logo=github)](https://github.com/Nora-Research-Lab)
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+ [![Hugging Face](https://img.shields.io/badge/HuggingFace-NoraResearchLab-FFD21E?logo=huggingface&logoColor=black)](https://huggingface.co/NoraResearchLab)
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+ [![LinkedIn](https://img.shields.io/badge/LinkedIn-NORA%20Research%20Lab-0A66C2?logo=linkedin)](https://www.linkedin.com/company/nora-research-lab)
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+ [![X](https://img.shields.io/badge/X-@noraresearchlab-000000?logo=x)](https://x.com/noraresearchlab)
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+ [![Website](https://img.shields.io/badge/Website-noraresearchlab.site-2ea44f)](https://noraresearchlab.site)
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+
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+ </div>
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+
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+ ---
62
+
63
+ ## Task
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+
65
+ Given **one complete well log** (curves sampled every 0.5 ft), output the **ordered list of continuous
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+ lithological intervals** across depth:
67
+
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+ ```json
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+ [{"top_depth_ft": 2150.0, "base_depth_ft": 2191.5, "lithology": "SHALE"},
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+ {"top_depth_ft": 2191.5, "base_depth_ft": 2230.0, "lithology": "LIMESTONE"},
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+ {"top_depth_ft": 2230.0, "base_depth_ft": 2246.5, "lithology": "UNKNOWN/MIXED"}]
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+ ```
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+
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+ Intervals must be contiguous and cover the logged interval. Classes: `SHALE`, `SANDSTONE`, `LIMESTONE`, `DOLOMITE`, `ANHYDRITE`, `SALT`, `COAL`, `UNKNOWN/MIXED`.
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+ `UNKNOWN/MIXED` marks depths where the available logs do not support a reliable single-lithology call.
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+
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+ | | |
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+ |---|---|
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+ | Wells | 234 (train 162 / validation 23 / test 49 — split by well) |
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+ | Depth samples | 1,884,159 |
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+ | Reference intervals | 48,140 |
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+ | Label-quality tiers | A: 166, B: 68 |
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+ | Config fingerprint | `e4cd8571a298aed4` |
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+ | Reference fingerprint | `939b949ee1ef89db` |
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+
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+ ## Files / configs
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+
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+ | Config | Content | Role |
89
+ |---|---|---|
90
+ | `logs` | `well_id, depth_ft, GR, RHOB, NPHI, PEF, DT, RT, CALI` (QC'd, `NaN` = curve absent) | **model input** |
91
+ | `intervals` | `well_id, interval_id, top_depth_ft, base_depth_ft, thickness_ft, lithology, mean_score, mean_margin, mean_evidence, purity, washout_fraction` | **reference answer** |
92
+ | `depthwise` | per-depth final label, pre-segmentation label, score, margin, evidence, washout flag | reference (depth-wise metrics) |
93
+ | `wells` | one row per well: split, tier, curves present, QC report per curve, baselines, interval count | metadata |
94
+
95
+ `label_config.json` holds every threshold used; `curve_specs.json` the mnemonic rules; `manifest.json` versions and hashes.
96
+
97
+ ## How the reference labels are produced (deterministic, no randomness, no machine learning)
98
+
99
+ 1. **Curve detection** — each LAS curve is matched to a standard curve by mnemonic alias → regex → description keywords → unit, so
100
+ `RHOZ`, `DEN`, `RHOB` all become `RHOB`, `ILD`/`LLD`/`AT90`/conductivity become `RT`, etc. Ties are broken by data coverage then name.
101
+ 2. **Unit standardisation** — metres→feet, kg/m³→g/cc, %→fraction, µs/m→µs/ft, mm→in, conductivity→resistivity.
102
+ 3. **Quality control** — sentinel/null masking, physical-range masking, flat-line (dead tool) masking, Hampel spike removal, resampling to a
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+ fixed grid (bin-mean for fine logs, gap-limited interpolation for coarse), low-coverage curve rejection, caliper-based washout flag that
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+ down-weights density/neutron/PEF/sonic evidence.
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+ 4. **Multi-log fuzzy scoring** — per depth, each lithology is scored from every *available* feature (gamma index normalised per well,
106
+ RHOB, limestone-scale NPHI, PEF, DT, log resistivity, neutron–density separation) through trapezoidal membership functions and
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+ configurable weights. Missing curves reduce evidence; they never crash the method. Contradicted lithologies are penalised.
108
+ 5. **UNKNOWN/MIXED gate** — assigned when available-evidence weight, best score, or the margin over the runner-up falls below configured limits.
109
+ 6. **Segmentation** — depth-wise calls are median/mean smoothed, then runs thinner than the minimum bed thickness are iteratively absorbed
110
+ into the better-fitting neighbour and equal neighbours merged, yielding geological intervals instead of log noise.
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+
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+ Lithology plateau ranges used (full trapezoids in `label_config.json`):
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+
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+ | Lithology | GRI | RHOB | NPHI | PEF | DT | LOGRT | ND_SEP |
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+ |---|---|---|---|---|---|---|---|
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+ | SHALE | 0.7 – 3 | 2.3 – 2.65 | 0.28 – 0.5 | 2.7 – 3.7 | 90 – 140 | 0 – 0.8 | 0.05 – 0.25 |
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+ | SANDSTONE | -2 – 0.3 | 2.2 – 2.68 | -0.02 – 0.17 | 1.6 – 2.4 | 53 – 90 | 0 – 2 | -0.15 – -0.02 |
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+ | LIMESTONE | -2 – 0.3 | 2.4 – 2.73 | 0 – 0.2 | 4.6 – 5.6 | 46 – 72 | 1 – 3 | -0.03 – 0.03 |
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+ | DOLOMITE | -2 – 0.3 | 2.7 – 2.9 | 0.03 – 0.22 | 2.9 – 3.7 | 43 – 65 | 0.8 – 3 | 0.04 – 0.18 |
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+ | ANHYDRITE | -2 – 0.15 | 2.9 – 3 | -0.05 – 0.04 | 4.8 – 5.4 | 49 – 53 | 2.8 – 5 | 0.12 – 0.25 |
121
+ | SALT | -2 – 0.15 | 2 – 2.2 | -0.05 – 0.05 | 4.5 – 4.9 | 65 – 70 | 2.8 – 5 | -0.5 – -0.3 |
122
+ | COAL | -2 – 0.6 | 1.15 – 1.75 | 0.5 – 0.9 | 0 – 1.4 | 110 – 160 | 1.5 – 4 | -0.3 – 0.3 |
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+
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+
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+ ## Evaluation
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+
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+ ```python
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+ from datasets import load_dataset
129
+ import pandas as pd
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+ logs = pd.concat([load_dataset("NoraResearchLab/lithology-sequence-benchmark", "logs", split=s).to_pandas() for s in ["test"]])
131
+ ref = pd.concat([load_dataset("NoraResearchLab/lithology-sequence-benchmark", "intervals", split=s).to_pandas() for s in ["test"]])
132
+
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+ # my_model(well_curves_df) -> DataFrame[top_depth_ft, base_depth_ft, lithology]
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+ # summary, per_well = evaluate_model(my_model, logs, ref) # evaluate_model / metrics live in the builder notebook
135
+ ```
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+
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+ Reported metrics: pooled **depth macro-F1 / accuracy** (also on confident-reference depths only), **boundary F1** at ±2.5/5/10 ft, and
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+ **sequence similarity** (1 − normalised edit distance of the ordered lithology sequence).
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+
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+ ## Important limitations — please read
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+
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+ - **These are rule-derived (silver-standard) labels, not core- or cutting-verified lithology.** They measure agreement with a transparent
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+ petrophysical interpretation of the logs; they are not independent ground truth. A model with access to the same curves can in principle
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+ learn the rules, so strong scores indicate rule recovery, not proven geological accuracy.
145
+ - Default signatures are generic clean-matrix / textbook ranges, **not calibrated to Kansas**. Boundaries shift by a few feet because of smoothing.
146
+ - Neutron logs are assumed limestone-scale unless the mnemonic says otherwise. Heavy mud, casing, salt-section washouts and bad tools can mislead any log-only method.
147
+ - Sandstone-vs-limestone-vs-dolomite separation is weaker when PEF/DT are absent (tier B wells), which increases `UNKNOWN/MIXED`.
148
+
149
+ ## Source data & attribution
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+
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+ Logs come from the public digital wireline-log archives of the **Kansas Geological Survey (KGS)**, University of Kansas
152
+ (https://www.kgs.ku.edu/Magellan/Logs/). KGS distributes data "as is" without warranty; consult the KGS terms and disclaimer before
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+ downstream use. This is an independent derivative work, not endorsed by the KGS.
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+
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+ ## Maintainer
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+
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+ **NORA Research Lab**
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+
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+ [![GitHub](https://img.shields.io/badge/GitHub-Nora--Research--Lab-181717?logo=github)](https://github.com/Nora-Research-Lab)
160
+ [![Hugging Face](https://img.shields.io/badge/HuggingFace-NoraResearchLab-FFD21E?logo=huggingface&logoColor=black)](https://huggingface.co/NoraResearchLab)
161
+ [![LinkedIn](https://img.shields.io/badge/LinkedIn-NORA%20Research%20Lab-0A66C2?logo=linkedin)](https://www.linkedin.com/company/nora-research-lab)
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+ [![X](https://img.shields.io/badge/X-@noraresearchlab-000000?logo=x)](https://x.com/noraresearchlab)
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+
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+ Quick links: [Website](https://noraresearchlab.site) · [GitHub](https://github.com/Nora-Research-Lab) · [Hugging Face](https://huggingface.co/NoraResearchLab) · [LinkedIn](https://www.linkedin.com/company/nora-research-lab) · [X](https://x.com/noraresearchlab)
curve_specs.json ADDED
@@ -0,0 +1,320 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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+ {
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+ "GR": {
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+ "aliases": [
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+ "GR",
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+ "GRC",
6
+ "GRD",
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+ "GRN",
8
+ "GRR",
9
+ "SGR",
10
+ "GRS",
11
+ "GRCX",
12
+ "GR_EDTC",
13
+ "GRGC",
14
+ "GAMMA",
15
+ "GAM"
16
+ ],
17
+ "patterns": [
18
+ "^GR[A-Z0-9_]{0,3}$",
19
+ "GAMMA"
20
+ ],
21
+ "exclude": [
22
+ "CGR",
23
+ "^GRAD",
24
+ "^GRID",
25
+ "GRAIN",
26
+ "^GRP"
27
+ ],
28
+ "descr": [
29
+ "gamma"
30
+ ],
31
+ "units": [
32
+ "GAPI",
33
+ "API",
34
+ "GAPI."
35
+ ],
36
+ "unit_only": true
37
+ },
38
+ "RHOB": {
39
+ "aliases": [
40
+ "RHOB",
41
+ "RHOZ",
42
+ "RHOC",
43
+ "RHOBC",
44
+ "RHO8",
45
+ "ZDEN",
46
+ "DEN",
47
+ "DENS",
48
+ "RHO",
49
+ "DENB"
50
+ ],
51
+ "patterns": [
52
+ "^RHO",
53
+ "^DEN"
54
+ ],
55
+ "exclude": [
56
+ "DRHO",
57
+ "^RHOM",
58
+ "RHOF",
59
+ "^RHOG",
60
+ "DCOR",
61
+ "DPHI"
62
+ ],
63
+ "descr": [
64
+ "bulk density",
65
+ "density"
66
+ ],
67
+ "units": [
68
+ "G/C3",
69
+ "G/CC",
70
+ "G/CM3",
71
+ "K/M3",
72
+ "KG/M3",
73
+ "GM/CC"
74
+ ],
75
+ "unit_only": false
76
+ },
77
+ "NPHI": {
78
+ "aliases": [
79
+ "NPHI",
80
+ "NPOR",
81
+ "CNPOR",
82
+ "TNPH",
83
+ "NPHI_LS",
84
+ "NPLS",
85
+ "NPSS",
86
+ "NPDL",
87
+ "NPHIL",
88
+ "NPRL",
89
+ "CNLS",
90
+ "CNL",
91
+ "NEU",
92
+ "CN",
93
+ "SNP"
94
+ ],
95
+ "patterns": [
96
+ "^NPHI",
97
+ "^NPOR",
98
+ "^TNPH",
99
+ "^CNPOR",
100
+ "NEUT",
101
+ "^CNL"
102
+ ],
103
+ "exclude": [
104
+ "DPHI",
105
+ "PHID",
106
+ "NCNL",
107
+ "FCNL",
108
+ "NRAT",
109
+ "RNRA",
110
+ "CPS",
111
+ "^NEUTRON_COUNT"
112
+ ],
113
+ "descr": [
114
+ "neutron"
115
+ ],
116
+ "units": [
117
+ "V/V",
118
+ "%",
119
+ "PU",
120
+ "DEC",
121
+ "FRAC",
122
+ "PERC",
123
+ "PERCENT",
124
+ "P.U.",
125
+ "SSPU",
126
+ "LSPU"
127
+ ],
128
+ "reject_units": [
129
+ "CPS",
130
+ "CNTS",
131
+ "COUNTS",
132
+ "GAPI",
133
+ "API"
134
+ ],
135
+ "unit_only": false
136
+ },
137
+ "PEF": {
138
+ "aliases": [
139
+ "PEF",
140
+ "PEFZ",
141
+ "PE",
142
+ "PEFA",
143
+ "PEFL",
144
+ "PEFB",
145
+ "PEFC"
146
+ ],
147
+ "patterns": [
148
+ "^PEF?\\d?$",
149
+ "PHOTO"
150
+ ],
151
+ "exclude": [
152
+ "^PEAK",
153
+ "^PERM"
154
+ ],
155
+ "descr": [
156
+ "photoelectric",
157
+ "photo electric",
158
+ "photo-electric"
159
+ ],
160
+ "units": [
161
+ "B/E",
162
+ "BARN/E",
163
+ "B/ELEC",
164
+ "BARNS/E",
165
+ "BN/E"
166
+ ],
167
+ "unit_only": true
168
+ },
169
+ "DT": {
170
+ "aliases": [
171
+ "DT",
172
+ "DTC",
173
+ "DTCO",
174
+ "DELT",
175
+ "DT4P",
176
+ "DTLN",
177
+ "DTLF",
178
+ "DT24",
179
+ "DTCM",
180
+ "AC"
181
+ ],
182
+ "patterns": [
183
+ "^DT(C|CO|LN|LF)?\\d?$",
184
+ "SONIC"
185
+ ],
186
+ "exclude": [
187
+ "^DTS",
188
+ "DTEM",
189
+ "^DTSH"
190
+ ],
191
+ "descr": [
192
+ "sonic",
193
+ "transit",
194
+ "slowness"
195
+ ],
196
+ "units": [
197
+ "US/F",
198
+ "USEC/FT",
199
+ "US/FT",
200
+ "US/M",
201
+ "USEC/M",
202
+ "UFT",
203
+ "MICROSEC/FT"
204
+ ],
205
+ "unit_only": false
206
+ },
207
+ "RT": {
208
+ "aliases": [
209
+ "ILD",
210
+ "RILD",
211
+ "LLD",
212
+ "RLLD",
213
+ "LLDC",
214
+ "RT",
215
+ "RDEP",
216
+ "AT90",
217
+ "AHT90",
218
+ "AHF90",
219
+ "RESD",
220
+ "RES_DEEP",
221
+ "HDRS",
222
+ "M2R9",
223
+ "RLA5",
224
+ "RD",
225
+ "RDEEP",
226
+ "RT90",
227
+ "ILDC",
228
+ "DIL",
229
+ "LL3"
230
+ ],
231
+ "fallback_aliases": [
232
+ "ILM",
233
+ "RILM",
234
+ "RMED",
235
+ "AT60",
236
+ "AHT60",
237
+ "RLA3",
238
+ "RM",
239
+ "RES",
240
+ "RESI",
241
+ "LLS",
242
+ "RLLS",
243
+ "SFL",
244
+ "SFLU",
245
+ "AT30",
246
+ "AHT30"
247
+ ],
248
+ "conductivity_aliases": [
249
+ "CILD",
250
+ "COND",
251
+ "CIND",
252
+ "CILM",
253
+ "CDEP"
254
+ ],
255
+ "patterns": [
256
+ "^AT\\d{2}$",
257
+ "^RLA\\d$",
258
+ "RESIST"
259
+ ],
260
+ "exclude": [
261
+ "^RXO",
262
+ "^MSFL",
263
+ "^RSHAL",
264
+ "CORR"
265
+ ],
266
+ "descr": [
267
+ "resistivity",
268
+ "induction",
269
+ "laterolog"
270
+ ],
271
+ "units": [
272
+ "OHMM",
273
+ "OHM-M",
274
+ "OHM.M",
275
+ "OHMS",
276
+ "OHM/M",
277
+ "OHM"
278
+ ],
279
+ "conductivity_units": [
280
+ "MMHO/M",
281
+ "MS/M",
282
+ "MMHO",
283
+ "MHO/M"
284
+ ],
285
+ "unit_only": false
286
+ },
287
+ "CALI": {
288
+ "aliases": [
289
+ "CALI",
290
+ "CAL",
291
+ "CALS",
292
+ "HCAL",
293
+ "CAL1",
294
+ "CALX",
295
+ "CALY",
296
+ "C1",
297
+ "C13",
298
+ "DCAL"
299
+ ],
300
+ "patterns": [
301
+ "^CAL",
302
+ "^HCAL"
303
+ ],
304
+ "exclude": [
305
+ "^CALC"
306
+ ],
307
+ "descr": [
308
+ "caliper",
309
+ "hole diameter"
310
+ ],
311
+ "units": [
312
+ "IN",
313
+ "INCH",
314
+ "IN.",
315
+ "MM",
316
+ "INCHES"
317
+ ],
318
+ "unit_only": false
319
+ }
320
+ }
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