Well Log Interpretation & Lithostratigraphic Correlation
Interpret well logs and correlate rock layers across boreholes
What You Can Do
Analyze borehole logs (gamma ray, resistivity, density, porosity) to identify lithologies and geological formations. Correlate stratigraphic sequences across multiple wells to map subsurface geometry and predict formation properties. Generate cross-sections, depth-to-formation charts, and stratigraphic interpretations from raw log data.
Features
Identify distinctive gamma ray, resistivity, and sonic signatures to recognize sandstone, shale, limestone, and coal intervals
Match formations and marker beds across wells to trace layer geometry and lateral continuity
Extract formation tops and construct depth tables for exploration and development planning
Create stratigraphic cross-sections showing formation geometry, thickness trends, and structural relationships
Interpret porosity logs and core data to estimate reservoir quality and fluid-flow potential
Identify shale layers and evaluate caprock integrity for trap geometry and containment assessment
Compile stratigraphic summaries, pick tables, and interpretive narratives for technical presentations and regulatory filings
Flag ambiguous intervals and data gaps, noting confidence levels and alternative interpretations
Example Output
Example 1: Formation Top Picks
Well ABC-1
Depth (ft) | Formation | Lithology | Log Signature
2,450 | Dakota Sandstone | Sand | Low GR, High Res
2,890 | Mowry Shale | Shale | High GR, Low Res
3,120 | Muddy Sandstone | Sand/Shale | Mixed response
Example 2: Stratigraphic Correlation Note "Dakota Sandstone thickens eastward (45 ft at ABC-1 → 62 ft at DEF-2) with improved porosity and resistivity, suggesting progradational facies shift and reservoir quality enhancement downdip."
Example 3: Cross-Section Summary "North-south section reveals anticline with crest at 2,800 ft in well ABC-1; Mowry seal present across all wells; Dakota reservoir dips 8° eastward with thickness >50 ft in four of five wells, supporting drilling location recommendation."
What's Included
- Well Log Analysis Framework: Systematic workflow for reading gamma ray, resistivity, density, and sonic logs to identify rock types and fluid contacts
- Formation Correlation Checklist: Detailed guide for recognizing marker beds, tracing formations across wells, and documenting correlation confidence
- Depth Pick Template: Structured table format for recording formation tops, contacts, and thickness measurements with notes
- Cross-Section Interpretation Guide: Instructions for constructing stratigraphic cross-sections and annotating structural/depositional features
- Well Report Template: Professional format for documenting log interpretation, picks, correlations, and exploration/development conclusions
Who It's For
- Exploration Geologist
- Development Geoscientist
- Petrophysicist
- Geotechnical Engineer
- Hydrogeologist
Best For
- Identifying formations and lithologies from wireline logs
- Correlating stratigraphic sequences across a prospect area
- Extracting formation tops and depth-to-formation tables
- Evaluating reservoir quality and seal integrity
- Preparing well interpretation summaries and technical reports
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