US 11,945,994 B1Granted

Method to design for permeability of portland based systems

AssigneeHalliburton Energy Services, Inc.

InventorsSiva Rama Krishna Jandhyala, Gunnar Lende, Samuel J. Lewis, Thomas Jason Pisklak

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Abstract

A method of designing a cement slurry may include: (a) selecting a target permeability and a density requirement; (b) inputting the target permeability into a permeability model and generating a proposed cement composition using the permeability model, wherein the proposed cement composition comprises at least a cement and concentration thereof, and a water and concentration thereof such that a cement slurry formed from the proposed cement composition water meet the density requirement; (c) preparing the cement slurry based on the proposed cement composition; and (d) introducing the cement slurry into a wellbore and allowing the cement slurry to set to form a hardened cement.

Claims20

Dependent claims

A method of designing a cement slurry comprising:

(a) selecting a target permeability and a density requirement;
(b) inputting the target permeability into a permeability model and generating a proposed cement composition using the permeability model, wherein the proposed cement composition comprises at least a dry blend of cement and concentration thereof, and a water and concentration thereof, such that a cement slurry formed from the proposed cement composition meets the density requirement, wherein the permeability model is a function of film forming additives, volume average value of particle size distribution comprising D30, D50, D70, and/or D90 of solids in the dry blend, and mass averaged values comprising at least one mass averaged value selected from the group consisting of Ca/Si, Ca/Al, Si/Al ratio of the dry blend, and any combination thereof;
(c) preparing the cement slurry based on the proposed cement composition;
and
(d) introducing the cement slurry into a wellbore and allowing the cement slurry to set to form a hardened cement.

2 more elements

A method comprising:

(a) providing cement components comprising a plurality of cements each comprising a dry blend of cement, supplementary cementitious materials, inert materials, and chemical additives;
(b) analyzing physicochemical properties of the cement components;
(c) preparing a plurality of cement slurries comprising various amounts of the cement components and water;
(d) curing the plurality of cement slurries at various temperatures and pressures to form a plurality of cured cements;
(e) performing permeability tests on each of the plurality of cured cements;
and
(f) fitting a permeability model using regression analysis of the permeability of each of the plurality of cured cements, composition of the plurality of cement slurries, the physicochemical properties of the cement components, curing pressure, and curing temperature, to form a fitted permeability model, wherein the permeability model is a function of film forming additives, volume average value of particle size distribution comprising D30, D50, D70, and/or D90 of solids in the dry blend, and mass averaged values comprising at least one mass averaged value selected from the group consisting of Ca/Si, Ca/Al, Si/Al ratio of the dry blend, and any combination thereof.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/092,070Filed 30 Dec 2022
Granted: 2 Apr 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

C04B 28/02
Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic…
C09K 8/467
Containing inorganic binders, e.g. Portland cement: containing additives for specific purposes
C04B 28/04
Containing hydraulic cements other than calcium sulfates: portland cements
C04B 40/0032
Aspects relating to the mixing step of the mortar preparation: controlling the process of mixing, e.g. adding ingredients in a quantity depending…