Date post: | 18-Aug-2015 |
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Testing and Subsea
Internship Presentation
- Shail Soni- University of Petroleum and
Energy Studies, Dehradun
Well Test Objectives
• Boundaries
• Flow Rate
• Permeability
• Reservoir Pressure
• Samples
Types of Tests
• Single Rate
• Multi Rate
• Extended Well Test
• Gas Well Test– Isochronal
– Modified Isochronal
– Flow after Flow
Ph, Hydrostatic Pressure
Pf, Formation Pressure
DST Concept
Pc < Pf
Packer to Isolate formation
Down Hole Valve to CONTROL formation (Closed)
Tubing/ Drill Pipe to Channel flow to surface
Pc, Cushion Pressure
Drill Stem Test
• Downhole Testing Equipments– Tester Fluid
– Sampler
– Gauges
– Packers
– TCP Gun
Drill Stem Test
Example String
Surface Well Testing
Subsea Safety System
• Requirement:– Well control during harsh weather conditions
– Deal with Hydrate formation
Subsea Saftey System
Retainer Valve Lubricator valve Sub-sea Tree
Data Acquisition System
• Importance of Pressure and Temperature Data– UB /OB
– Well Performance
– Fluid Interfaces
– Reservoir Analysis
– Well Interference
Well Life and DAS
• Exploration Phase• Producibility and profitability
• Development Phase• Reservoir Continuity and Communication
• Later Stages• Reservoir life.
• Secondary recovery technique implimentations
DAS
• Types of Gauges– Mechanical
– Electronic
Sampling
• Importance of Sampling
• Types of Sampling– Surface
– Bottomhole
• Processes in Sampling– Acquire
– Transfer
– Store
– Evaluate
– Analyze
Sampling
• Types of Samplers– SPS 15
– SPS-A
• Protection against Sour Systems
Thanks!