283096450-Mud-Llllllllllllllllllogging.ppt

Mud

1. Mud LoggingMud Logging

2. Mud LoggingMud Logging

Mud Logging also called the Hydrocarbon Logging, involves Mud Logging also called the Hydrocarbon Logging, involves
monitoring and recording of variety of data related to bore hole monitoring and recording of variety of data related to bore hole
and drilling process..... Likeand drilling process..... Like
1, Gas detection1, Gas detection
2, Gas Analysis2, Gas Analysis
3, Drill cutting Identification and Analysis3, Drill cutting Identification and Analysis
4, ROP4, ROP
5, Mud Tank Volume Monitoring5, Mud Tank Volume Monitoring
6, Changes in flow and sudden influx of gas.6, Changes in flow and sudden influx of gas.

3. 
Portable cable or Unit.Portable cable or Unit.
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Electronic instruments to monitor gas, ROP, pumps Electronic instruments to monitor gas, ROP, pumps
and flow rates.and flow rates.
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Gas trap in the mud flow line.Gas trap in the mud flow line.
Mud Logging EquipmentMud Logging Equipment

4. Mud Logging TechniquesMud Logging Techniques
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Drilling mud from the bottom of the hole brings Drill cuttings Drilling mud from the bottom of the hole brings Drill cuttings
and Gas/Oiland Gas/Oil
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Samples are collected at the screens called shale shaker, and then Samples are collected at the screens called shale shaker, and then
washed and cleaned for examination and storage.washed and cleaned for examination and storage.
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A microscope is used to look at the samples and describe them.A microscope is used to look at the samples and describe them.
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A UV Box with an ultra voilate tube is used to detect the A UV Box with an ultra voilate tube is used to detect the
presence of any hydrocarbon in the sample.presence of any hydrocarbon in the sample.

5. 
Gas from the mud is extracted by an instrument called Gas Trap, Gas from the mud is extracted by an instrument called Gas Trap,
and is sent through a tube to logging unit for measurement.and is sent through a tube to logging unit for measurement.

This gas is passed through a meter called Hydrocarbon detector This gas is passed through a meter called Hydrocarbon detector
which measures the amount of gas prsent in the mud.which measures the amount of gas prsent in the mud.

Analyasis of Gas is then carried outby a Gas Chromotograph to Analyasis of Gas is then carried outby a Gas Chromotograph to
give break down from C1 to C5.give break down from C1 to C5.
Gas DetectionGas Detection

6. Depth, ROP, and Mud Tank Volume & Depth, ROP, and Mud Tank Volume &
Level.Level.
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Sensors are mounted on the Rig to Monitor depth and rate of Sensors are mounted on the Rig to Monitor depth and rate of
drilling progress.drilling progress.

ROP Varies with the Hardness or Softness of Rocks.ROP Varies with the Hardness or Softness of Rocks.
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Monitoring of increase & decrease of the level of mud or any Monitoring of increase & decrease of the level of mud or any
sudden change in the level, indicates inflow or loss of circulation.sudden change in the level, indicates inflow or loss of circulation.
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This alerts drill crew for any potential hazard.This alerts drill crew for any potential hazard.

7. 
This is basically used for,This is basically used for,
1, Show Evaluation1, Show Evaluation
2, Reservoir and Litho logical Description2, Reservoir and Litho logical Description
3, Geological correlation and formation identification3, Geological correlation and formation identification
4, verification of Wire line Log response.4, verification of Wire line Log response.
Cutting Sample AnalysisCutting Sample Analysis

8. Cutting Sample AnalysisCutting Sample Analysis
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Sampling IntervalSampling Interval. . Collected at a regular intervals of 1-10 Collected at a regular intervals of 1-10
meters, depends upon ROP.meters, depends upon ROP.
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Sample LagSample Lag. . This is the time difference b/w when the rock This is the time difference b/w when the rock
is first cut and when the sample is caught at the surface. is first cut and when the sample is caught at the surface.
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Sample PreparationSample Preparation. .
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Wet or “un washed" samples are packed in cloth or plastic bags.Wet or “un washed" samples are packed in cloth or plastic bags.
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Dry Samples or washed samples are washed, cleaned and examined under a Dry Samples or washed samples are washed, cleaned and examined under a
microscope and then dried for storage in paper or envelop.microscope and then dried for storage in paper or envelop.
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All Sample Bags are marked with depth , well name and company name .All Sample Bags are marked with depth , well name and company name .

9. Cutting Sample AnalysisCutting Sample Analysis

Sample Analysis.Sample Analysis.

Visual examination under microscope for,Visual examination under microscope for,
1, Rock Type1, Rock Type
2, Color2, Color
3, Hardness3, Hardness
4, Grain Size4, Grain Size
5, Sorting5, Sorting
6, Cementation materials6, Cementation materials
7, Sedimentary Structures7, Sedimentary Structures
8, Visual Porosity8, Visual Porosity
9, Hydrocarbon Show9, Hydrocarbon Show

10. 1, Mud logging is applied on Wildcat or exploratory wells as well as 1, Mud logging is applied on Wildcat or exploratory wells as well as
field development wells,field development wells,
2, High pressure wells where it helps in preventing potential blow 2, High pressure wells where it helps in preventing potential blow
out.out.
3, Where continuous monitoring is required to make changes in the 3, Where continuous monitoring is required to make changes in the
drilling program, take cores, run wire line logs pick casing point, drilling program, take cores, run wire line logs pick casing point,
or decide on DST.or decide on DST.
Application of Mud LogsApplication of Mud Logs