Notional Field Development Final Report - EBN

EBN Notional Field Development Plan
Single well reservoir model - In the case of a more detailed evaluation being required, a single well
model using a reservoir simulation model can be generated. The advantage will be to include actual
reservoir properties from the geological model. In this analysis, known boundaries from geological work
such as faults and aquifers can be incorporated with better accuracy.
Another advantage of a reservoir model approach is that we can provide a longer term production
forecast for the well based on the geological and test data. The method is typically done to predict liquid
drop in the reservoir or in the wellbore for high yield gas.
Fluid analysis - There are a few types of analyses recommended for both reservoir evaluation and
facilities design.
Fluid analyses to be carried out at this stage are as follows:
• Mercury content from sample
• Gas / oil composition analysis
• CVD (Constant Volume Depletion) analysis of the gas condensate or volatile oil sample to be
used to simulate reservoir depletion performance and composition variation. This data will also
be used to generate either black oil PVT or EOS correlation.
• CCE (Constant Composition Expansion) analysis for the oil phase for similar purposes as in point
2.
The priority will be emphasized on the well deliverability (rate, permeability and skin).
3.4.2.4 Test Equipment Requirements
The equipment for the testing will be standard. The only thing that needs to be defined early is if sour
service or HPHT equipment is required due to CO2/H2S content or high pressure/temperature condition
of the reservoir.
It is always the best option to have the down-hole and surface test equipment coming from the same
company to eliminate problems with connections between surface and down-hole tools. In the case of
the surface and test tools coming from different companies, early evaluations on required connections
need to be done to allow time to manufacture some connections if required.
Down-hole test equipment - The key tool for down-hole test equipment is the pressure gauge. A quartz
gauge with sufficient battery capacity to hold data for the entire test period should be prepared.
A downhole pressure gauge is be the best option since it will reduce the possibility that the wellbore
storage effect continues into the middle and late time regions of the transient pressure response. This
also will avoid misinterpretation of the permeability and boundary conditions.
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