Intelligent screen out mitigation
Systems and methods may be configured for acquiring one or more pumping operation measurements at a surface during a fracturing operation; calculating a least resistance condition for the fracturing operation based at least in part on the fracturing operation and the one or more pumping operation measurements. In addition, systems and methods may also be configured for calculating a new resistance condition based at least in part on one or more pumping operation measurements and the least resistance condition, and calculating a relative screen out risk with the least resistance condition and the new resistance condition.
1 . A method comprising: acquiring one or more pumping operation measurements utilizing at least a pump controller at a surface during a fracturing operation; calculating a least resistance condition for the fracturing operation based at least in part on the fracturing operation and the one or more pumping operation measurements; calculating a new resistance condition based at least in part on one or more pumping operation measurements and the least resistance condition; and calculating a relative screen out risk with the least resistance condition and the new resistance condition.
2 . The method of claim 1 , further comprising determining a bottom hole pressure, wherein the bottom hole pressure is computed by:
BHP= P s +P f +P h
wherein, P s , P f , P h are Surface treating pressure, Frictional pressure drop and Hydrostatic pressure respectively.
3 . The method of claim 2 , further comprising determining a ratio of the bottom hole pressure to a flow rate.
4 . The method of claim 3 , wherein the least resistance condition is determined when the ratio of the bottom hole pressure to the flow rate is at its minimum.
5 . The method of claim 2 , further comprising determining a reference pressure at least resistance condition by:
P
r
e
f
=
B
H
P
-
(
(
0
.2369
×
ρ
×
Q
2
)
(
C
d
2
×
D
4
×
N
2
)
)
wherein, P ref is the reference pressure inside fracture, Q is current flow rate and ρ, Cd, D, N are slurry density, discharge coefficient, perforation diameter, and N is number of perforation holes open.
6 . The method of claim 5 , further comprising calculating a number of perforation holes with the reference pressure and at least resistance condition, wherein with the bottom hole pressure corresponds to flow rate.
7 . The method of claim 6 , further comprising calculating a threshold number of perforation holes with the reference pressure and at least resistance condition, with the bottom hole pressure corresponding to kickout pressure and the flow rate.
8 . The method of claim 7 , further comprising calculating a number of perforation holes 108 of the new resistance condition with the reference pressure and a current pressure flow rate, wherein the current pressure flow rate is calculated with bottom hole pressure and the flow rate.
9 . The method of claim 8 , further comprising calculating a relative number of perforation holes open with respect to a least resistance number of perforation holes open.
10 . The method of claim 9 , further comprising calculating a relative threshold number of perforation holes open with respect to a least resistance threshold number of perforation holes open.
11 . The method of claim 10 , wherein computing the relative screen out risk utilizes:
Risk
Relative
=
1
-
Relative
N
,
t
-
Relative
N
T
h
r
eshold
,
t
Relative
N
,
0
-
Relative
N
T
hreshold
,
0
wherein Risk Relative is relative screen out, Relative N, t is current relative number of perforation holes open, Relative N Threshold,t is current relative threshold number of perforation holes open, Relative N, 0 is relative number of perforation holes open at least resistance, and Relative N Threshold,0 is relative threshold number of perforation holes at least resistance.
12 . The method of claim 1 , wherein the one or more pumping operation measurements comprise pressure measurements, flow rate, surface proppant concentration, bottomhole pressure, friction reducer concentration, and/or slurry density.
13 . The method of claim 1 , further comprising adjusting a slurry proppant concentration and other variables impacting surface pressure based on the relative screen out risk.
14 . A non-transitory computer readable medium having data stored therein representing a software executable by a computer, the software executable comprising instructions configured to: acquire one or more pumping operation measurements utilizing at least a pump controller at a surface during a fracturing operation; calculate a least resistance condition for the fracturing operation based at least in part on the fracturing operation and the one or more pumping operation measurements; calculate a new resistance condition based at least in part on one or more pumping operation measurements and the least resistance condition; and calculate a relative screen out risk with the least resistance condition and the new resistance condition.
15 . The non-transitory computer readable medium of claim 14 , wherein the instructions are further configured to determine a bottom hole pressure, wherein the bottom hole pressure is computed by:
BHP= P s +P f +P h
wherein, P s , P f , P h are Surface treating pressure, Frictional pressure drop and Hydrostatic pressure respectively and determine a ratio of the bottom hole pressure to a flow rate.
16 . The non-transitory computer readable medium of claim 15 , wherein the least resistance condition is determined when the ratio of the bottom hole pressure to the flow rate is at its minimum.
17 . The non-transitory computer readable medium of claim 16 , wherein the instructions are further configured to determine a reference pressure at least resistance condition by:
P
r
e
f
=
B
H
P
-
(
(
0
.2369
×
ρ
×
Q
2
)
(
C
d
2
×
D
4
×
N
2
)
)
wherein, P ref is the reference pressure inside fracture, Q is current flow rate and ρ, Cd, D, N are slurry density, discharge coefficient, perforation diameter, and N is number of perforation holes open.
18 . The non-transitory computer readable medium of claim 17 , wherein the instructions are further configured to calculate a number of perforation holes with the reference pressure and at least resistance condition, wherein with the bottom hole pressure corresponds to flow rate.
19 . The non-transitory computer readable medium of claim 18 , wherein the instructions are further configured to calculate a threshold number of perforation holes with the reference pressure and at least resistance condition, with the bottom hole pressure corresponding to kickout pressure and the flow rate.
20 . The non-transitory computer readable medium of claim 19 , wherein the instructions are further configured to calculate a number of perforation holes of the new resistance condition with the reference pressure and a current pressure flow rate, wherein the current pressure flow rate is calculated with bottom hole pressure and current flow rate, a relative number of perforation holes open with respect to a least resistance number of perforation holes open, and a relative threshold number of perforation holes open with respect to a least resistance threshold number of perforation holes open.