ANALYSIS OF CONDUCTIVE LAYERS ON ROCK ELECTRICAL CONDUCTIVITY USING THE FINITE ELEMENT METHOD
High electrical conductivity zones pose challenges in interpreting hydrocarbon zones. Several factors contribute to the occurrence of these high conductivity zones, one of which is the presence of conductive minerals such as iron oxides. In this study, rock modeling was performed considering the...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/84559 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | High electrical conductivity zones pose challenges in interpreting hydrocarbon
zones. Several factors contribute to the occurrence of these high conductivity zones,
one of which is the presence of conductive minerals such as iron oxides. In this
study, rock modeling was performed considering the presence of magnetite in the
form of cracks and hematite in a spherical shape. The conductivity of the rock was
calculated using the finite element method (FEM). The sample used in this study
was 100³ voxels in size. Before calculating the conductivity of the model, FEM
conductivity results were compared with several simple models, such as a
chessboard model, cubic inclusions, and models with 1 and 2 cracks. The
comparison results between FEM conductivity and analytical formulations showed
that FEM successfully estimated conductivity with good accuracy, indicated by an
error value of < 5%. The conductivity results in the geometric model were
influenced by the crack fraction and crack connectivity. Meanwhile, in the model
with spherical grains, the rock conductivity was more influenced by hematite
conductivity when the rock porosity was low. This is because rocks with low
porosity have less space for fluid storage.
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