Method to design cement slurry with minimal carbon footprint

Patent metadata

Field	Value
Publication number	US-12435259-B2
Application number	US-202117387630-A
Country	US
Kind code	B2
Filing date	Jul 28, 2021
Priority date	Jul 28, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A method of producing a cement composition with reduced carbon emissions may include: defining cement constraints comprising at least one cement property; calculating a set of cement compositions which satisfy the cement constraints, using cement property models corresponding to the cement constraints; calculating a carbon emission associated with each of the cement compositions in the set of cement compositions using a carbon footprint model; selecting a cement composition from the set of cement compositions; and preparing the cement composition.

First claim

What is claimed is:

1. A method of producing a cement composition with reduced carbon emissions comprising:
(a) defining cement constraints comprising at least one cement property;
(b) calculating a set of cement compositions which satisfy the cement constraints, using cement property models corresponding to the cement constraints;
(c) calculating a carbon emission associated with each of the cement compositions in the set of cement compositions using a carbon footprint model;
(d) selecting a cement composition from the set of cement compositions; and
(e) preparing the cement composition selected in step (d).

2. The method of claim 1 , wherein the at least one cement property comprises a property selected from the group consisting of density, upper thickening time, lower thickening time, upper fluid loss, minimum compressive strength, minimum mixability, and combinations thereof.

3. The method of claim 1 , wherein the step of calculating the set of cement compositions comprises
(f) generating a cement composition by selecting at least a cement and concentration thereof, a supplementary cementitious material and a concentration thereof, a water and concentration thereof, and one or more chemical additives and concentration thereof;
(g) generating a calculated cement property from the cement composition from step (f), wherein the calculated cement property corresponds to a first cement constraint from the cement constraints, wherein generating the calculated cement property comprises using a cement property model corresponding to the first cement constraint;
(h) comparing the calculated cement property to the first cement constraint, and performing steps (f)-(h) if the calculated property does not meet or exceed the first cement constraint, wherein the step of generating a cement composition comprises selecting different concentrations and/or different chemical identities for the cement and/or supplementary cementitious materials and/or one or the more chemical additives than previously selected or performing step (i) if the calculated property meets or exceeds the first cement constraint; and
(i) adding the generated cement composition from step (f) to the set of cement compositions.

4. The method of claim 3 , further comprising:
(j) selecting a cement composition from the set of cement compositions;
(k) generating a calculated cement property from the cement composition from step (j), wherein the calculated cement property corresponds to a second cement constraint from the cement constraints, wherein generating the calculated cement property comprises using a cement property model corresponding to the second cement constraint; and
(l) comparing the calculated cement property to the second cement constraint, and removing the cement composition from step (j) from the set of cement compositions if the calculated cement property does not meet or exceed the second cement constraint, or performing steps (j)-(h) if the calculated property meets or exceeds the second cement constraint.

5. The method of claim 4 , further comprising:
(m) repeating steps (j)-(l) for each cement constraint in the cement constraints.

6. The method of claim 1 , wherein the step of calculating a carbon emission comprises:
(o) selecting a cement composition from the set of cement compositions;
(p) calculating a volume of slurry for a unit mass of powder of the cement composition selected in step (o) using the following equation:

V
slurry

=

m
powder

ρ
powder

+

ρ
slurry

ρ
powder

-
1

1
-

ρ
slurry

ρ

wa
⁢
ter

ρ
water

where V slurry is volume of slurry, m powder is a unit mass of powder of the cement composition selected in step (o), ρ powder is density of the cement composition selected in step (o), ρ slurry is density of a slurry, and ρ water is density of water;
(q) calculating a carbon footprint of the cement composition selected in step (o) using the following equation:

carbon
⁢

footprint

=

∑

i

⁢

x
i

×
CO
⁢

2
i

V
slurry

where, x i is mass fraction of material i in the cement composition selected in step (o), and CO2 i is the emission due to material i; and
(r) repeating steps (o)-(q) for each cement composition in the set of cement compositions.

7. The method of claim 1 , wherein selecting the cement composition from the set of cement compositions comprises selecting based at least in part on the carbon emission associated with the selected cement composition.

8. The method of claim 1 , further comprising placing the cement composition prepared in step (e) in a wellbore.

9. The method of claim 3 , wherein the cement is selected from the group consisting of Portland cements, pozzolana cements, gypsum cements, high alumina content cements, silica cements, and combinations thereof.

10. The method of claim 3 wherein the supplementary cementitious material is selected from the group consisting of fly ash, blast furnace slag, silica fume, pozzolans, kiln dust, clays, and combinations thereof and the chemical additive is selected from the group consisting cement set retarders, cement accelerators, and combinations thereof.

11. A method of producing a cement composition with reduced carbon emissions comprising:
(a) defining cement constraints comprising at least one cement property;
(b) calculating a set of cement compositions which satisfy the cement constraints, using cement property models corresponding to the cement constraints;
(c) calculating a carbon emission associated with each of the

Assignees

• Halliburton Energy Services Inc

Inventors

• Jandhyala Siva Rama Krishna
• Singh John Paul Bir

Classifications

• E21B33/13

  Methods or devices for cementing, for plugging holes, crevices or the like · CPC title

• C04B14/04

  Silica-rich materials; Silicates · CPC title

• C04B28/04

  Portland cements · CPC title

• E21B33/14

  for cementing casings into boreholes · CPC title

• C09K8/487

  Fluid loss control additives; Additives for reducing or preventing circulation loss · CPC title