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Petroleum Engineering 648 — Pressure Transient Testing Lecture 1 — Introduction to Pressure DRAWDOWN Testing
Tom BLASINGAME | [email protected] | Texas A&M U.
Dak
e, L
. P.:
Fund
amen
tals
of R
eser
voir
Engi
neer
ing,
Els
evie
r (19
78).
Constant Rate Pressure DRAWDOWN Behavior: Dake
Slide — 1
Petroleum Engineering 648 — Pressure Transient Testing Lecture 1 — Introduction to Pressure DRAWDOWN Testing
Tom BLASINGAME | [email protected] | Texas A&M U.
Mat
thew
s, C
.S. a
nd R
usse
ll, D
.G.:
Pres
sure
Bui
ldup
and
Flo
w T
ests
in W
ells
, Mon
ogra
ph V
ol. 1
, SPE
(196
7).
Constant Rate Pressure DRAWDOWN Behavior — History Plot: Matthews and Russell
Slide — 2
Petroleum Engineering 648 — Pressure Transient Testing Lecture 1 — Introduction to Pressure DRAWDOWN Testing
Tom BLASINGAME | [email protected] | Texas A&M U.
Constant Rate Pressure DRAWDOWN Behavior — Flow Equations:
khqBm
src
kmpp
tmp
src
ktkhqBp
strc
kkhqBp
strc
kkhqBpp
rf
wtrfihr
rfhr
wti
wti
wtiwf
6.162
8686.02275.3log
log
8686.02275.3loglog6.162
8686.01688
1log6.162
21688
1ln6.70
21
1
2
2
2
hAcqBm
sCr
A
ekhqBpp
tmpp
thAcqBs
Cr
A
ekhqBpp
tpss
Awi
psswf
tAwiwf
23395.0
214ln6.70
23395.0214ln6.70
2int
int
2
Transient RADIAL Flow Relation: Pseudosteady-State Flow Relation:
Slide — 3
Petroleum Engineering 648 — Pressure Transient Testing Lecture 1 — Introduction to Pressure DRAWDOWN Testing
Tom BLASINGAME | [email protected] | Texas A&M U.
Mat
thew
s, C
.S. a
nd R
usse
ll, D
.G.:
Pres
sure
Bui
ldup
and
Flo
w T
ests
in W
ells
, Mon
ogra
ph V
ol. 1
, SPE
(196
7).
Constant Rate Pressure DRAWDOWN Behavior — Flow Equations:
hAcqBm
sCr
A
ekhqBpp
tmpp
tpss
Awi
psswf
23395.0
214ln6.70 2int
int
khqBm
src
kmpp
tmpp
rf
wtrfihr
rfhrwf
6.162
8686.02275.3log
log
21
1
No Analysis
Pseudosteady-State Flow:●Reservoir Volume. (only!)
Transient RADIAL Flow:●Formation Permeability (k).●Near-Well Skin Factor (s).
Slide — 4
Petroleum Engineering 648 — Pressure Transient Testing Lecture 1 — Introduction to Pressure DRAWDOWN Testing
Tom BLASINGAME | [email protected] | Texas A&M U.
Mat
thew
s, C
.S. a
nd R
usse
ll, D
.G.:
Pres
sure
Bui
ldup
and
Flo
w T
ests
in W
ells
, Mon
ogra
ph V
ol. 1
, SPE
(196
7).
Constant Rate Pressure DRAWDOWN Behavior — Semilog Plot: Matthews and Russell
Slide — 5
Petroleum Engineering 648 — Pressure Transient Testing Lecture 1 — Introduction to Pressure DRAWDOWN Testing
Tom BLASINGAME | [email protected] | Texas A&M U.
Earlo
ughe
r, R
.C.,
Jr.:
Adv
ance
s in
Wel
l Tes
t Ana
lysi
s, M
onog
raph
Vol
. 5, S
PE (1
977)
.Constant Rate Pressure DRAWDOWN Behavior — Various Plots: Earlougher
Plot Inventory:●History (or Strip) Plot.●Log-Log Plot.●Semilog Plot.
History Plot:
Log-Log Plot:
Semilog Plot:
Slide — 6
Petroleum Engineering 648 — Pressure Transient Testing Lecture 1 — Introduction to Pressure DRAWDOWN Testing
Tom BLASINGAME | [email protected] | Texas A&M U.
Mat
thew
s, C
.S. a
nd R
usse
ll, D
.G.:
Pres
sure
Bui
ldup
and
Flo
w T
ests
in W
ells
, Mon
ogra
ph V
ol. 1
, SPE
(196
7).
Constant Rate Pressure DRAWDOWN Behavior — Muddy Sandstone Example: Matthews and Russell
Slide — 7
Petroleum Engineering 648 — Pressure Transient Testing Lecture 1 — Introduction to Pressure DRAWDOWN Testing
Tom BLASINGAME | [email protected] | Texas A&M U.
Mat
thew
s, C
.S. a
nd R
usse
ll, D
.G.:
Pres
sure
Bui
ldup
and
Flo
w T
ests
in W
ells
, Mon
ogra
ph V
ol. 1
, SPE
(196
7).
Boundary-Dominated Flow Concept: Matthews and Russell
Numbers indicate approximate relative production rates of wells;each well drains an area proportional to its rate.
Red
lines
indi
cate
app
roxi
mat
e "d
rain
age
boun
darie
s."
Slide — 8
Petroleum Engineering 648 — Pressure Transient Testing Lecture 1 — Introduction to Pressure DRAWDOWN Testing
Tom BLASINGAME | [email protected] | Texas A&M U.
Mat
thew
s, C
.S. a
nd R
usse
ll, D
.G.:
Pres
sure
Bui
ldup
and
Flo
w T
ests
in W
ells
, Mon
ogra
ph V
ol. 1
, SPE
(196
7).
Earlo
ughe
r, R
.C.,
Jr.:
Adv
ance
s in
Wel
l Tes
t Ana
lysi
s, M
onog
raph
Vol
. 5, S
PE (1
977)
,Average Reservoir Pressure — Example: Matthews and Russell/Earlougher
wsws
ws
ptd
bpp
tbapp
1
)exp(
Slide — 9
Petroleum Engineering 648 — Pressure Transient Testing Lecture 1 — Introduction to Pressure DRAWDOWN Testing
Tom BLASINGAME | [email protected] | Texas A&M U.
Average Reservoir Pressure — Concept Example: DakeD
ake,
L. P
.: Fu
ndam
enta
ls o
f Res
ervo
ir En
gine
erin
g, E
lsev
ier (
1978
).
Slide — 10
Petroleum Engineering 648 — Pressure Transient Testing Lecture 1 — Introduction to Pressure DRAWDOWN Testing
Tom BLASINGAME | [email protected] | Texas A&M U.
Mat
thew
s, C
.S. a
nd R
usse
ll, D
.G.:
Pres
sure
Bui
ldup
and
Flo
w T
ests
in W
ells
, Mon
ogra
ph V
ol. 1
, SPE
(196
7).
Well Interference — Example: Matthews and Russell
Slide — 11