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Lecture 2

Terms in this set (13)

Steps to perform mud logging (9)
[Tips : Collect, Describe, Interpret, Estimate, Maintain, Pore pressure, Evaluate, Producibility, Parameters]
[List numerically]
1. Collect drill cuttings
2. Describe the cuttings
3. Interpret the cuttings
4. Estimate the properties (Porosity, permeability)
5. Maintain and monitor drilling and safety related sensing equipment
6. Estimate pore pressure
7. Collect, monitor and evaluate the HC released
8. Assess the producibility of HC bearing formations
9. Maintain a record of drilling parameters
Types of mud (2)
[List numerically]
1. Oil based mud
2. Water based mud
Applications of mud logging (4)
[Tips : Monitor, Lithology, Indication, HC]
[List numerically]
1. Monitor bit performance
2. Determine lithology
3. Early indication of well's position to determine casing depth, total depth and coring depth
4. Indication of HC type
Types of rotary coring equipment (3)
[Tips : C,D,W]
[List numerically]
1. Conventional coring
2. Diamond coring
3. Wireline retrievable coring
2 "characteristics" of conventional coring
[Tips : Large, Cannot]
[List numerically]
1. Can obtain large diameter core
2. Drilling operations cannot be resumed without removing the drill pipe from the hole
Characteristic of wireline retrievable coring
Can proceed with normal drilling operations without removing the drill pipe from the hole
What are used to determine gun position for side wall coring? (2)
[List numerically]
1. SP
2. Gamma ray
Types of formation testing (2)
[List numerically]
1. Wireline Testing
2. Drill Stem Test
2 types of Wireline Testing
1. Repeat Formation Tester (RFT)
2. Formation Interval Tester (FIT)
How is RFT different from FIT?
[Tips : Type RFT - ... and FIT - ...]
RFT - run into hole and continuous digital readout hydrostatic pressure is obtained and FIT - has only 1 pressure reading and 1 sample for each run
2 types of Drill Stem Test
[List numerically]
1. Pressure build up
2. Draw down test
The purpose of Wireline Testing?
[Tips : Fluid sample-Pressure-Mobility-Continuity]
To provide reservoir fluid sample, reservoir pressure, indication of fluid mobility and reservoir continuity
The purpose of DST?
[Tips : Isolate - pressure]
To isolate and test the geological formation through the drill stem and to measure the pressure behavior
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