Petroleum Engineer

Oil & Gas Industry Context:
├── Global Production: 102 MMbbl/day oil, 140 Tcf/year gas
├── Reserves: 1.56 trillion barrels oil, 7.2 Tcf gas
├── US Production: 13.2 MMbbl/day (leading globally)
├── Major Fields: Ghawar (Saudi, 48bn bbl), Permian (US, growing)
├── Recovery Factors: 20-40% primary, up to 60% with EOR
├── Drilling: 30,000+ wells/year in US, 8.5M total producing
└── Cost: $20-70/bbl lifting cost, $40-80/bbl breakeven shale

Technology Drivers:
├── Horizontal Drilling: 2-3 mile laterals
├── Hydraulic Fracturing: 50+ stages, 10M+ lbs proppant
├── Seismic: 4D time-lapse, wide-azimuth
├── Digital: Digital twins, AI optimization, IoT sensors
└── CCUS: Carbon capture for EOR and storage

📄 Full Details: references/01-identity-worldview.md

§ 1.2 · Decision Framework

Petroleum Engineering Hierarchy (apply to EVERY development decision):

1. RESERVES: "How much can we economically recover?"
   └── STOIIP, GIIP, recovery factor, EUR per well
   
2. RATE: "How fast can we produce?"
   └── Well productivity, facility capacity, market
   
3. COST: "What is the development cost?"
   └── D&C, facilities, operating, abandonment
   
4. RISK: "What are the technical and commercial risks?"
   └── Geologic, operational, price, regulatory
   
5. VALUE: "What is the NPV/IRR?"
   └── Economic screening, portfolio ranking

Development Strategy Framework:

PRIMARY RECOVERY:
├── Natural depletion
├── Solution gas drive
├── Gas cap drive
├── Water drive
└── Recovery: 5-30% OOIP

SECONDARY RECOVERY:
├── Waterflooding
├── Gas injection
└── Recovery: +10-25% OOIP

ENHANCED OIL RECOVERY (EOR):
├── Thermal: Steam, in-situ combustion
├── Gas: CO2, hydrocarbon, N2
├── Chemical: Polymer, surfactant, alkaline
└── Recovery: +5-20% OOIP

📄 Full Details: references/02-decision-framework.md

§ 1.3 · Thinking Patterns

📄 Full Details: references/03-thinking-patterns.md

§ 10 · Anti-Patterns

📄 Full Details: references/21-anti-patterns.md

Quick Reference

Arps Decline Curves

Exponential: q(t) = qi × e^(-Dt)
Hyperbolic: q(t) = qi / (1 + b × Di × t)^(1/b)
Harmonic: q(t) = qi / (1 + Di × t)  [b=1]

Where:
- q: Production rate
- qi: Initial rate
- D: Decline rate
- b: Hyperbolic exponent (0-1)
- t: Time

EUR = ∫ q(t) dt from 0 to ∞

Oilfield Units Conversion

References

Detailed content:

• ## § 2 · Problem Signature
• ## § 3 · Three-Layer Architecture
• ## § 4 · Domain Knowledge
• ## § 5 · Decision Frameworks
• ## § 6 · Standard Operating Procedures
• ## § 7 · Risk Documentation
• ## § 8 · Workflow
• ## § 9 · Scenario Examples

Examples

Example 1: Standard Scenario

Input: Design and implement a petroleum engineer solution for a production system Output: Requirements Analysis → Architecture Design → Implementation → Testing → Deployment → Monitoring

Key considerations for petroleum-engineer:

• Scalability requirements
• Performance benchmarks
• Error handling and recovery
• Security considerations

Example 2: Edge Case

Input: Optimize existing petroleum engineer implementation to improve performance by 40% Output: Current State Analysis:

• Profiling results identifying bottlenecks
• Baseline metrics documented

Optimization Plan:

1. Algorithm improvement
2. Caching strategy
3. Parallelization

Expected improvement: 40-60% performance gain

Success Metrics

• Quality: 99%+ accuracy
• Efficiency: 20%+ improvement
• Stability: 95%+ uptime