24-Pet-B2 Oil and Gas Evaluation and Economics
Worked solutions to 5 past sittings (2014–2016), 35 questions. Pick a sitting, or start from a topic below.
Topics across the sittings
Topics that come up in more than one sitting, taken from the headings of our worked solutions. A topic counts once per sitting.
- Terminology (5 sittings): May 2016 Q1 · December 2015 Q1 · May 2015 Q1 · December 2014 Q1 · Undated paper Q1
- Density (2 sittings): December 2015 Q2 · December 2014 Q2
- Gas Composition (2 sittings): December 2015 Q2 · December 2014 Q2
- Non-Darcy Factor (2 sittings): May 2015 Q6 · December 2014 Q6
- True Skin (2 sittings): May 2015 Q6 · December 2014 Q6
Questions by sitting
May 2016
- Question 1: Terminology
- Question 2: Gas Properties and Pipeline Velocity
- Question 3: Pipeline Suitability Check
- Question 4: Volumetric Dry Gas Reservoir
- Question 5: Exponential Decline
- Question 6: Real-Gas Pseudopressure Drawdown
- Question 7: Back-Pressure Test and Absolute Open Flow
December 2015
- Question 1: Terminology
- Question 2: Gas Composition — Pseudocriticals, Density, FVF, and Gas-in-Place
- Question 3: Flow Measurement — Techniques and Meter Performance
- Question 4: Horizontal Flowline — Pressure Traverse to the Facility
- Question 5: Harmonic Decline — Economic-Limit Production Life and Reserves
- Question 6: Gas Well Near a Sealing Fault — Image-Well Superposition
- Question 7: Gas Well Buildup Test — Permeability, Skin, and End of Wellbore Storage
May 2015
- Question 1: Terminology
- Question 2: Average Gas Velocity in a Flow Line
- Question 3: Gas Transmission Pipeline Diameter Sizing
- Question 4: Harmonic Decline from a ln(q)–Gp Crossplot
- Question 5: Well Pressure via Real Gas Pseudopressure — Two-Rate Superposition
- Question 6: Two Flow Tests — True Skin and Non-Darcy Factor
- Question 7: Deliverability from a Back-Pressure Test
December 2014
- Question 1: Terminology
- Question 2: Gas Composition — Apparent MW, SG, Density, and FVF
- Question 3: Gas Pipeline Flow Capacity and Velocity
- Question 4: Decline Curve Analysis from a Gp–q Crossplot
- Question 5: Well Pressure via Real Gas Pseudopressure (Transient Flow)
- Question 6: Two-Rate Drawdown Test — True Skin and Non-Darcy Factor
- Question 7: Deliverability Equation and Absolute Open Flow from a Back-Pressure Test
Undated paper
- Question 1: Terminology
- Question 2: Phase Envelope of a Natural Gas Reservoir
- Question 3: Sour Gas Mixture Properties
- Question 4: Actual and Standard Gas Flow Rates
- Question 5: Horizontal Pipeline Gas Flow Rate
- Question 6: Two-Phase Flow Regime (Gregory–Aziz–Mandhane)
- Question 7: Original Gas in Place (Volumetric Method)