The Study of New Method of Modern Well Testing By Using Surface Control
The accurate infonnation of the in-situ reservoir condition is very significant to every phase in petroleum engineering thus help the reservoir engineers to have better understanding on the reservoir and completion efficiency qualitatively and quantitatively. The analysis toward pressure data rec...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
Universiti Teknologi PETRONAS
2011
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| Online Access: | http://utpedia.utp.edu.my/10352/1/2011%20-%20The%20study%20of%20new%20method%20of%20modern%20well%20testing%20by%20using%20surface%20control.pdf http://utpedia.utp.edu.my/10352/ |
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| Summary: | The accurate infonnation of the in-situ reservoir condition is very significant to every phase
in petroleum engineering thus help the reservoir engineers to have better understanding on
the reservoir and completion efficiency qualitatively and quantitatively. The analysis toward
pressure data recorded during well test has been used for many years to evaluate the reservoir
characteristic especially in determining the value of well damage (skin), effective
permeability and heterogtllleity behavior. However, well testing has become increasingly
unpopular especially in exploration and appraisal wells due to the expensive costs, safety and
environmental impact factors. For the production well, the potential revenue loss during
buildup testing is one of the reason to decline well testing in their activity. For past 30 years,
many methods have been published to improved the well testing technique but the problem of
the cost either the expensive tools or the production loss is still occur. This paper presented
the new technique of implementing well testing by using surface control which reduces the
cost and eliminates the risk of running tools into well bores. This new technique also created
to overcome the problem of the constant rate which in practical it is not achieved by allowing
the varying rate test. Thus, it will increase better interpretation with lower the uncertainty
ranges. The idea of this new technique will overcome all the weakness of conventional well
testing and brings the significant impact to the industry. First, the general framework of the
flowing surface-bottomhole pressure calculation will be presented which will be compared
with the measured data from field and also with the calculation from the computer program
using Modified Hagedorn and Brown Correlation. The pressure difference between the
calculated flowing bottomhole pressure with measured depth averagely 3 to 6 psia. Next, the
study of Tiab's Direct Synthesis method with the available multi rate test data taken from
published source is analyzed and compared the result with the conventional analysis. The
results obtained from the Tiab's Direct Synthesis method are very close with real data which
the percentage difference of the absolute permeability estimate is about 0.36%. The specific
procedure required in order to implement this new technique which focusing on choke
control and test design will also be explained. The report also presents some case study of
application of well testing toward estimating reservoir parameters for Malaysia fields. |
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