ANALYSIS OF OVERPRESSURE CHARACTERISTICS BASED ON WELL DATA IN SAMPANG BLOCK, MADURA SUB-BASIN, EAST JAVA BASIN
The East Java Basin is one of the hydrocarbon producing basins in Indonesia with overpressure occurrences. The study area location is in the Sampang Block which is located in this basin. This study was conducted to determine the characteristics of pore pressure and evaluate the presence of ove...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/78855 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The East Java Basin is one of the hydrocarbon producing basins in Indonesia with
overpressure occurrences. The study area location is in the Sampang Block which is
located in this basin. This study was conducted to determine the characteristics of pore
pressure and evaluate the presence of overpressure zones within Lidah Formation in
five wells from Well SA-1 to SA-5. The data used consisted of wireline log data, drilling
report, pressure test and mudweight, and vitrinite reflectance.
The results of this study indicate that overpressure conditions are found in all wells
generated by the loading mechanism with pore pressure values ranging from 460 to
7600 psi. The top of overpressure in Wells SA-1 and SA-3 is at depth of 595 to 600 m,
whereas in Wells SA-2, SA-4, and SA-5 at depth of 320 to 380 m. The overpressure
occurrence in the study area was controlled by the high rapid sedimentation and
Rembang – Madura – Kangean – Sakala Zone (RMKS) which also influenced the
sediment supply. |
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