CARBONATE RESERVOIR STATIC MODEL OF BATURAJA FORMATION IN PH FIELD SOUTH SUMATRA BASIN
Static reservoir modeling is needed for every productive oil and gas field. It can represent 3 dimensional reservoir characteristics so that facies distribution and property reservoir will be easily understood horizontally or vertically. Static carbonate reservoir modeling of Baturaja Formatio...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/80537 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Static reservoir modeling is needed for every productive oil and gas field. It can
represent 3 dimensional reservoir characteristics so that facies distribution and
property reservoir will be easily understood horizontally or vertically. Static
carbonate reservoir modeling of Baturaja Formation in PH field is expected to
optimize the field development.
The static modeling at PH field used interdisciplinary integrated data of geology,
geophysics, and petrophysics. The data consisted of 7 lines of migration-class
seismic and 2 check-shot data. Besides that, log data & petrophysics calculation
from 9 wells, and well core from one of the well with facies description and
porosity-permeability calculation are also used as main data. The method used for
distribute facies data and reservoir properties is geostatistic method. Geostatistic
method is a statistic technique which is used to find spatial relationship among of
variable group in predicting value of the same variable at another location without
data.
Result of seismic interpretation showed that PH field has build-up carbonate
reservoir with North-South direction. Based on the pattern from gamma rays log,
there are 4 carbonate growth/precipitation cycles. Description of well core
explains that there are 3 facieses, i.e. wackestone, packstone-grainstone, and coral.
Each facies can be distinguished based on IGR log and PHIN-PHID. Analysis of
well core and seismic section description showed that depositional environment of
carbonate reservoir existed in shallow water with ramp type carbonate. The static
modeling with geostatistic showed that there is similarity of pattern between
facies model and property model.
Validation of static model was conducted to measure the model accuracy. The
validation used 2 methods, which are statistical test and blind well test. The result
showed that there is similarity between original log data and modeling result.
Therefore, the static reservoir model is expected represent the real subsurface
condition |
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