This document discusses well testing and subsea internship presentations. It covers the objectives of well tests such as determining boundaries, flow rates, permeability, and reservoir pressure. It describes different types of well tests including single rate tests, multi rate tests, and extended well tests. It explains drill stem testing concepts and equipment used including test fluids, samplers, gauges, packers and perforating guns. It also discusses surface well testing, subsea safety systems, data acquisition systems, sampling techniques and equipment used for sampling.

1. Testing and
Subsea
Internship Presentation
- Shail Soni
- University of Petroleum and
Energy Studies, Dehradun

2. Well Test Objectives
• Boundaries
• Flow Rate
• Permeability
• Reservoir Pressure
• Samples

3. Types of Tests
• Single Rate
• Multi Rate
• Extended Well Test
• Gas Well Test
– Isochronal
– Modified Isochronal
– Flow after Flow

4. 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

5. Drill Stem Test
• Downhole Testing Equipments
– Tester Fluid
– Sampler
– Gauges
– Packers
– TCP Gun

6. Drill Stem Test
Example String

7. Surface Well Testing

8. Subsea Safety System
• Requirement:
– Well control during harsh weather conditions
– Deal with Hydrate formation

9. Subsea Saftey System
Retainer Valve Lubricator valve Sub-sea Tree

10. Data Acquisition System
• Importance of Pressure and Temperature Data
– UB /OB
– Well Performance
– Fluid Interfaces
– Reservoir Analysis
– Well Interference

11. Well Life and DAS
• Exploration Phase
• Producibility and profitability
• Development Phase
• Reservoir Continuity and Communication
• Later Stages
• Reservoir life.
• Secondary recovery technique implimentations

12. DAS
• Types of Gauges
– Mechanical
– Electronic

13. Sampling
• Importance of Sampling
• Types of Sampling
– Surface
– Bottomhole
• Processes in Sampling
– Acquire
– Transfer
– Store
– Evaluate
– Analyze

14. Sampling
• Types of Samplers
– SPS 15
– SPS-A
• Protection against Sour Systems

15. Thanks!