# Advanced Reservoir Engineering Case Study

941 Words 4 Pages

Well Testing Coursework

Fauzan Shamsudeen
3302446

20th May, 2016

Contents
Question 1 3
Question 2 3
Question 3 4
Question 4 5
Question 5 6
Question 6 6
Question 7 6
Question 8 7
Question 9 7
Question 10 7
Question 11 8
Question 12 8
Question 13 10
Question 14 10
Reference 12

Question 1 Fig 1.0
Early time region (ETR) is the A region in fig 1.0 above. Middle time region (MTR) and Late time region (LTR) being represented by regions B and C in the fig 1 respectively, at the ETR, the wellbore and near well bore effects dominates, these effects includes the well bore storage, partial penetration, formation damage and phase distribution.
At the
Question 7
The characteristic shape of the radial flow regime on log-log plot is horizontal in nature, because the reservoir is mostly infinite acting.
Question 8 Fig 6.0
There will be increase in the calculated permeability value when the zero slope line is shifted up and a corresponding decrease should it be shifted down as shown in Fig 6

Question 9
Semi-log plot is that type plot that helps to analyse data that is related exponentially, where one of the axis is plotted using logarithmic scale
The following can be obtained from semi-log straight line analysis:
a) The slope of straight line m
b) Permeability product kh
c) The skin
d) Extrapolated pressure to infinite shut in time
Question 10

a) No, it is only a function of the reservoir properties, not dependent flow rate
b) It’s in Oifield units
c) 2 times
Question 11
Formation Volume factor (Bo) = 1.1
Viscosity (μ) = 2
Total Compressibility (Ct) =
At the MTR, the reservoir seems to be infinite acting, with spherical flow regime and radial flow regime in the late time region

Fig 8.0 log-log plot
Kh=141.2qBµ(PM)---------1

PM =

From fig 8.0 =2200
PD= 180
=180/2200
= 0.081
From 1
K100=141.2 x 1000 x 1.1 x2 x 0.081
K100= 25416
K= 254.16mD

Reference https://www.testwells.com/radius-of-investigation/ [Date accessed: 20th May, 2016]
Earlougher, R.C. Jr.: Advances in Well Test Analysis, Monograph Series, SPE, Richardson, TX (1977) 5, 5-264.

Homer, D.R.: "Pressure Build-up in Wells," Proc., Third World Pet. Cong., E.J. Brill, Leiden (1951) n, 503.
Simmons, J.F.: "Interpretation of Underbalanced Surge Pressure Data by Rate-Time Convolution," paper SPE 15477 presented at the 1986 SPE Annual Technical Conference and Exhibition, New Orleans, Oct.

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