Unformatted text preview: equation provided: Therefore the volume of dissolved gas is: Therefore the total amount of gas is: Part F
The volume of free gas in the reservoir at time n is: We know that over the time interval : and oil accumulation in the block is: 3 . Therefore the ENGI 9114 – Advanced Reservoir Engineering
Assignment # 4 Solutions – Winter 2011
Therefore the volume of free gas in the block at time n+1 is: Therefore at surface this becomes: We are not provided information concerning the change in formation volume factor. Therefore we
either assume in to be constant, or state that we are using
as an approximation for
. Therefore
we get: Again, the total volume is gas is the combination of free gas and dissolved gas. The volume of dissolved
gas is: From Part E we know: We do not know the value of
. For now we can either assume in to be constant, or state that we
are using
as an approximation for
. Therefore we get: Therefore the total amount of gas is: 4 ENGI 9114 – Advanced Reservoir Engineering
Assignment # 4 Solutions – Winter 2011 Part G
Now we want to determine an estimate for
definition, we know that: as oppose to assuming it to be constant. From the Utilizing the approximation on lecture notes 6 page 12: Using our calculated values: Given the change, a new iteration may be preformed (but not required for marks). Part H
The new bubble point at n+1 may be determined via: 5 ENGI 9114 – Advanced Reservoir Engineering
Assignment # 4 Solutions – Winter 2011 Part I
New information: The new equation for is: 6...
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 Winter '11
 DrJohansen
 #, Advanced Reservoir Engineering

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