Article: Reservoir Static Pressure match

[ÏÇæÏ ÍÇÒã]

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[Land_Mark]

Hello ÏÇæÏ ÍÇÒã,

Is this a freshly built Eclipse Model? Suggestion: try history matching in MBAL first (you need the accompanying production data with time) and determine the drive mechanisms, like new aquifer support, compartmentalization, fault leakage etc. Then use what you have learnt from the material balance history matching process to modify the eclipse model, like adding aquifers, modifying transmissibility across faults etc. Is it a mature field? Try considering the options which Eclipse use to report/calculate tank pressure; are the wells producing under pseudo-steady state conditions, then use a time dependent reservoir pressure averaging method like 2 days: otherwise 9- and 5-block averages are sufficient or you can specify the radius of investigation. These steps should save you time in the history matching process. Let me know if I'm wrong, I'm still learning.

Markus L.

[i-anuar]

i think there were discussions about this on this forum. i think there were suggestions to use 9/5 point average BHP's.
you can compare predicted FPR (field pressure) with measured values, just make sure you comparing similar things. for example if field is big may be better to make several regions (where appropriate) to to compare region presures? also static pressures, are they representative average pressures?
if match is not great then withdrawl to QC, gas-oil-water, next PVT how good it is, GOR check with producing GOR etc.
as mentioned by Land Mark aquifer (gas cap) could be other thing. on some fields your reservoir pressure can actually fall because of production on neighboring field