STUDY OF WELL CONNECTIVITY AND SUBSURFACE STRUCTURE INTERPRETATION USING TRITIUM TRACER IN WAYANG WINDU GEOTHERMAL FIELD
Tracer breakthrough analysis is a method which shows the connection between the injection and production wells to determine the characteristics of permeability between the production and injection wells. The analysis of tracer breakthrough in the research area shows high connectivity between MBE-...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/36303 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Tracer breakthrough analysis is a method which shows the connection between the
injection and production wells to determine the characteristics of permeability
between the production and injection wells. The analysis of tracer breakthrough in
the research area shows high connectivity between MBE-5 injection well in the
northern part and WWT-2 production well in the southern part, which have long
distance that indicates a large permeability control between both wells. Being
based on it, this study aims to identify the types of permeability that controls
interwell connection in the study area.
The research area is located in Wayang Windu Geothermal Field, Pangalengan
District, Bandung Regency, West Java Province. The initial stage is identifying the
number of geothermal systems based on volcanostratigrapy, gravity and
geochemistry studies. If it consists of one system, the major permeability that
controls the connection between MBE-5 injection well and WWT-2 production well
is primary permeability. However, if it consists of two systems, then the main
controlled of interwell connection is secondary permeability due to tectonic
processes. The next step is analyzing tracer trititum based on the breakthrough
curve of the production wells. The production wells that have breakthrough tracer
with high tritium concentration, the fast time and a long distance from injection
well are interpreted as a result of fault structure. Fault obtains from the tracer
analysis is integrated with validated subsurface fault structures. The results of the
data integration are the qualifications of mapped and unmapped subsurface
structures in the research area.
Being based on the analysis above, the Wayang Windu Geothermal Field consists
of two geothermal systems, namely the northern and southern geothermal systems.
Hyphotetically, the connectivity between the MBE-5 injection well and the WWT-2
production well is controlled by deep fault structure as a permeability pathway. |
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