Production Logging/Well testing
Name: Matthew Charles
ID number: 56449
Due Date: 17/11/2013
Lab: 5
Topic: Production logging/Well testing
Interval
Fluid Content
% of total production
7000’- 6960’
100% oil
20%
6960’- 6915’
80% water, 20% oil
50%
6900’- 6880’
20% water, 80% oil
20%
6870’- 6850’
100% water
10%
1.
In order to obtain the above information, a series of logs must be run. The fluid content, percentage of each fluid at every interval and also the percentage of total production of the well can be acquired using the following logs: Dielectric log tool, Gradiomanometer and a Continuous flow meter log.
Dielectric log tool: This tool is used in accordance with the fluid content log which detects water in the production profile due to its ionic bond and hence determines where hydrocarbons are. The log response of this tool is recorded on a scale of 0 to 1. If there is 100% oil in a perforation zone, the log response will be close to zero because it does not contain any electrical properties. However if there is a mixture of oil and water, due to the percentage of each fluid in the mixture it will shift either closer to zero because there is more hydrocarbons and vice versa.
Continuous flow Meter Log: Continuous flowmeter logging is used to determine the sources of water, oil and gas production due to their difference in velocity. If the above data was to be presented on a log, starting from the bottom of perforation, the response will show the maximum volume of fluid coming in from each perforation indicated by plateau forming. If it contains a mixture of liquids such as oil and water as seen at 6880’-6900’ there will be a significant difference in velocity when compared to their individual velocity.
Gradiomanometers: This type of production logging tool measures fluid densities of subsurface fluids. It detects the source of oil/water/gas in the production profile due to the difference in density. It uses a scale from 0.3- 1.2, with 1 being the density of
ID number: 56449
Due Date: 17/11/2013
Lab: 5
Topic: Production logging/Well testing
Interval
Fluid Content
% of total production
7000’- 6960’
100% oil
20%
6960’- 6915’
80% water, 20% oil
50%
6900’- 6880’
20% water, 80% oil
20%
6870’- 6850’
100% water
10%
1.
In order to obtain the above information, a series of logs must be run. The fluid content, percentage of each fluid at every interval and also the percentage of total production of the well can be acquired using the following logs: Dielectric log tool, Gradiomanometer and a Continuous flow meter log.
Dielectric log tool: This tool is used in accordance with the fluid content log which detects water in the production profile due to its ionic bond and hence determines where hydrocarbons are. The log response of this tool is recorded on a scale of 0 to 1. If there is 100% oil in a perforation zone, the log response will be close to zero because it does not contain any electrical properties. However if there is a mixture of oil and water, due to the percentage of each fluid in the mixture it will shift either closer to zero because there is more hydrocarbons and vice versa.
Continuous flow Meter Log: Continuous flowmeter logging is used to determine the sources of water, oil and gas production due to their difference in velocity. If the above data was to be presented on a log, starting from the bottom of perforation, the response will show the maximum volume of fluid coming in from each perforation indicated by plateau forming. If it contains a mixture of liquids such as oil and water as seen at 6880’-6900’ there will be a significant difference in velocity when compared to their individual velocity.
Gradiomanometers: This type of production logging tool measures fluid densities of subsurface fluids. It detects the source of oil/water/gas in the production profile due to the difference in density. It uses a scale from 0.3- 1.2, with 1 being the density of