Automated real-time drilling fluid density
Methods, systems, and computer-readable medium to perform operations including: determining, in real-time, values of drilling parameters of a drilling system drilling a wellbore; calculating, based on the values of the drilling parameters, a cuttings concentration in an annulus of the wellbore (CCA); calculating, based on the calculated CCA and a mud weight (MW) of a drilling fluid, an effective mud weight (MW eff ) of the drilling fluid; and controlling, based on the effective mud weight, a component of the drilling system to adjust at least one of the drilling parameters.
1. A computer-implemented method comprising:
determining, in real-time, values of drilling parameters of a drilling system drilling a wellbore, wherein the drilling parameters comprise: a rate of penetration (ROP) of a drilling tool of the drilling system in feet/hour, a hole size of the wellbore in feet, and a flow rate (GPM) of the drilling fluid at a mud pump of the drilling system in gallon per minutes;
calculating, based on the values of the drilling parameters, a cuttings concentration in an annulus of the wellbore (CCA), wherein the CCA is calculated using the equation:
CCA
=
ROP
*
hole
size
2
1471
*
GPM
*
T
R
,
and wherein TR is a dimensionless cuttings transport ratio;
calculating, based on the calculated CCA and a mud weight (MW) of a drilling fluid, an effective mud weight (MW eff ) of the drilling fluid; and
controlling, based on the effective mud weight, a component of the drilling system to adjust at least one of the drilling parameters.
2. The computer-implemented method of claim 1 , wherein the effective mud weight is calculated using the equation:
( MW eff )=( MW*CCA )+ MW.
3. The computer-implemented method of claim 1 , wherein controlling, based on the effective mud weight, a component of the drilling system to adjust at least one of the drilling parameters comprises:
determining, based on the effective mud weight, a rate of penetration for a drilling tool of the drilling system; and
controlling the drilling tool such that the rate of penetration of the drilling tool is less than or equal to the determined rate of penetration.
4. The computer-implemented method of claim 3 , wherein determining the rate of penetration for the drilling tool is further based on a pore pressure limit and a fracture pressure limit.
5. The computer-implemented method of claim 3 , wherein the rate of penetration is calculated using the equation:
ROP
=
8
1
0
*
(
MW
eff
-
MW
)
*
G
P
M
(
MW
*
OH
2
)
,
where OH is an open hole size of the wellbore.
6. A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:
determining, in real-time, values of drilling parameters of a drilling system drilling a wellbore, wherein the drilling parameters comprise: a rate of penetration (ROP) of a drilling tool of the drilling system in feet/hour, a hole size of the wellbore in feet, and a flow rate (GPM) of the drilling fluid at a mud pump of the drilling system in gallon per minutes;
calculating, based on the values of the drilling parameters, a cuttings concentration in an annulus of the wellbore (CCA), wherein the CCA is calculated using the equation:
CCA
=
ROP
*
hole
size
2
1471
*
GPM
*
T
R
,
and wherein TR is a dimensionless cuttings transport ratio;
calculating, based on the calculated CCA and a mud weight (MW) of a drilling fluid, an effective mud weight (MW eff ) of the drilling fluid; and
controlling, based on the effective mud weight, a component of the drilling system to adjust at least one of the drilling parameters.
7. The non-transitory, computer-readable medium of claim 6 , wherein the effective mud weight is calculated using the equation:
( MW eff )=( MW*CCA )+ MW.
8. The non-transitory, computer-readable medium of claim 6 , wherein controlling, based on the effective mud weight, a component of the drilling system to adjust at least one of the drilling parameters comprises:
determining, based on the effective mud weight, a rate of penetration for a drilling tool of the drilling system; and
controlling the drilling tool such that the rate of penetration of the drilling tool is less than or equal to the determined rate of penetration.
9. The non-transitory, computer-readable medium of claim 8 , wherein determining the rate of penetration for the drilling tool is further based on a pore pressure limit and a fracture pressure limit.
10. The non-transitory, computer-readable medium of claim 8 , wherein the rate of penetration is calculated using the equation:
ROP
=
8
1
0
*
(
MW
eff
-
MW
)
*
G
P
M
(
MW
*
OH
2
)
,
where OH is an open hole size of the wellbore.
11. A computer-implemented system, comprising:
one or more processors; and
a non-transitory computer-readable storage medium coupled to the one or more processors and storing programming instructions for execution by the one or more processors, the programming instructions instructing the one or more processors to perform operations comprising:
determining, in real-time, values of drilling parameters of a drilling system drilling a wellbore, wherein the drilling parameters comprise: a rate of penetration (ROP) of a drilling tool of the drilling system in feet/hour, a hole size of the wellbore in feet, and a flow rate (GPM) of the drilling fluid at a mud pump of the drilling system in gallon per minutes;
calculating, based on the values of the drilling parameters, a cuttings concentration in an annulus of the wellbore (CCA), wherein the CCA is calculated using the equation:
CCA
=
ROP
*
hole
size
2
1471
*
GPM
*
T
R
,
and wherein TR is a dimensionless cuttings transport ratio;
calculating, based on the calculated CCA and a mud weight (MW) of a drilling fluid, an effective mud weight (MW eff ) of the drilling fluid; and
controlling, based on the effective mud weight, a component of the drilling system to adjust at least one of the drilling parameters.
12. The computer-implemented system of claim 11 , wherein the effective mud weight is calculated using the equation:
( MW eff )=( MW*CCA )+ MW.
13. The computer-implemented system of claim 11 , wherein controlling, based on the effective mud weight, a component of the drilling system to adjust at least one of the drilling parameters comprises:
determining, based on the effective mud weight, a rate of penetration for a drilling tool of the drilling system; and
controlling the drilling tool such that the rate of penetration of the drilling tool is less than or equal to the determined rate of penetration.
14. The computer-implemented system of claim 13 , wherein determining the rate of penetration for the drilling tool is further based on a pore pressure limit and a fracture pressure limit.