METHODS FOR PRODUCING FLUID INVASION RESISTANT CEMENT SLURRIES

• US 20150284621A1
• Filed: 10/21/2013
• Published: 10/08/2015
• Est. Priority Date: 10/31/2012
• Status: Active Grant

• Current Assignee: Halliburton Servicos, Ltda. (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Santra, Ashok K., Paiva, Maria das Dores M., Marchesini, Flavio H., De Oliveira, Rafael Menezes, Khammar, Merouane
• Granted Patent: US 10,047,587 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C04B 2103/0088 Compounds chosen for their latent hydraulic characteristics, e.g. pozzuolanes
• CPC Class Codes: C04B 2103/10 Accelerators; Activators
• CPC Class Codes: C04B 2103/20 Retarders
• CPC Class Codes: C04B 2103/408 Dispersants
• CPC Class Codes: C04B 2103/46 Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
• CPC Class Codes: C04B 28/02 containing hydraulic cements other than calcium sulfates
• CPC Class Codes: C04B 40/0032 Controlling the process of mixing, e.g. adding ingredients in a quantity depending on a measured or desired value B28C7/00 takes precedence
• CPC Class Codes: C09K 8/46 containing inorganic binders, e.g. Portland cement
• CPC Class Codes: C09K 8/467 containing additives for specific purposes
• CPC Class Codes: C09K 8/48 Density increasing or weighting additives
• CPC Class Codes: E21B 33/138 Plastering the borehole wall; Injecting into the formation
• CPC Class Codes: E21B 33/14 for cementing casings into boreholes
• CPC Class Codes: Y02W 30/91 Use of waste materials as fillers for mortars or concrete

Abstract

Embodiments including methods comprising providing a wellbore in a subterranean formation having a wellbore length; providing a proposed cement slurry formulation; calculating a normalized pressure at a point along the wellbore length based on properties of the proposed cement slurry formulation and properties of the wellbore in the subterranean formation; manipulating the proposed cement slurry formulation based on the normalized pressure so as to produce a fluid invasion resistant cement slurry; introducing the fluid invasion resistant cement slurry into the wellbore; and cementing the fluid invasion resistant cement slurry in the wellbore.

Claims

1. A method comprising:

providing a wellbore in a subterranean formation having a wellbore length;

providing a proposed cement slurry formulation;

calculating a normalized pressure at a point along the wellbore length based on properties of the proposed cement slurry formulation and properties of the wellbore in the subterranean formation;

manipulating the proposed cement slurry formulation based on the normalized pressure so as to produce a fluid invasion resistant cement slurry;

introducing the fluid invasion resistant cement slurry into the wellbore; and

cementing the fluid invasion resistant cement slurry in the wellbore.

2. The method of claim 1, wherein the normalized pressure is determined at multiple points along the wellbore length of the wellbore.

3. The method of claim 1, wherein the steps of:

calculating a normalized pressure at a point along the wellbore length and manipulating the proposed cement slurry formulation based on the normalized pressure are repeated at least once so as to produce the fluid invasion resistant cement slurry.

4. The method of claim 1, wherein the proposed cement slurry formulation comprises a base fluid and a cementitious material.

5. The method of claim 2, wherein the proposed cement slurry formulation is manipulated to produce the fluid invasion resistant cement slurry by altering an amount of the cementitious material.

6. The method of claim 2, wherein the proposed cement slurry formulation further comprises a pozzolanic material;

a cement accelerator;

a cement retarder;

a fluid-loss additive;

a cement dispersant;

a cement extender;

a weighting agent;

a lost circulation additive;

or any combinations thereof.

7. The method of claim 6, wherein the pozzolanic material is selected from the group consisting of:

silica fume;

metakaolin;

fly ash;

diatomaceous earth;

calcined or uncalcined diatomite;

calcined fullers earth;

pozzolanic clays;

calcined or uncalcined volcanic ash;

bagasse ash;

pumice;

pumicite;

rice hull ash;

natural and synthetic zeolites;

slag;

vitreous calcium aluminosilicate; and

any combinations thereof.

8. The method of claim 1, wherein the properties of the proposed cement slurry formulation used to determine the normalized pressure are selected from the group consisting of:

mass balance;

momentum balance;

compressibility;

shrinkage;

shear rate;

rheological properties; and

any combinations thereof.

9. The method of claim 8, wherein the rheological properties of the proposed cement slurry formulation used to determine the normalized pressure are selected from the group consisting of:

shear stress;

relaxation time;

retardation time;

viscosity;

structural shear modulus;

structural viscosity;

steady shear flow;

steady-state viscosity;

consistency index;

power law index;

static yield stress;

dynamic yield stress;

steady-state viscosity of an unstructured state;

steady-state viscosity of a structured state;

equilibrium time; and

any combinations thereof.

10. The method of claim 1, wherein the properties of the wellbore in the subterranean formation used to determine the normalized pressure are selected from the group consisting of:

permeability;

capillary pressure;

swelling capacity;

stress;

well dimensions;

density of the formation; and

any combinations thereof.

11. A method comprising:

providing a wellbore in a subterranean formation having a wellbore length;

providing a proposed cement slurry formulation;

calculating a normalized pressure at a point along the wellbore length based on properties of the proposed cement slurry formulation and properties of the wellbore in the subterranean formation;

manipulating the proposed cement slurry formulation based on the normalized pressure so as to produce a fluid invasion resistant cement slurry;

wherein the properties of the proposed cement slurry formulation used to determine the normalized pressure are selected from the group consisting of;

mass balance;

momentum balance;

compressibility;

shrinkage;

shear rate;

rheological properties; and

any combinations thereof;

introducing the fluid invasion resistant cement slurry into the wellbore in the subterranean formation; and

cementing the fluid invasion resistant cement slurry in the wellbore in the subterranean formation.

12. The method of claim 11, wherein the proposed cement slurry formulation comprises a base fluid and a cementitious material.

13. The method of claim 12, wherein the proposed cement slurry formulation is manipulated to produce the fluid invasion resistant cement slurry by altering an amount of the cementitious material.

14. The method of claim 12, wherein the proposed cement slurry formulation further comprises a pozzolanic material;

a cement accelerator;

a cement retarder;

a fluid-loss additive;

a cement dispersant;

a cement extender;

a weighting agent;

a lost circulation additive;

or any combinations thereof.

15. The method of claim 11, wherein the rheological properties of the cement slurry used to determine the normalized pressure are selected from the group consisting of:

shear stress;

relaxation time;

retardation time;

viscosity;

structural shear modulus;

structural viscosity;

steady shear flow;

steady-state viscosity;

consistency index;

power law index;

static yield stress;

dynamic yield stress;

steady-state viscosity of an unstructured state;

steady-state viscosity of a structured state;

equilibrium time; and

any combinations thereof.

16. The method of claim 11, wherein the properties of the wellbore in the subterranean formation used to determine the normalized pressure are selected from the group consisting of:

permeability;

capillary pressure;

swelling capacity;

stress;

well dimensions;

density of the formation; and

any combinations thereof.

17. A method comprising:

providing a wellbore in a subterranean formation having a wellbore length;

providing a proposed cement slurry formulation;

calculating a normalized pressure at a point along the wellbore length based on properties of the proposed cement slurry formulation and properties of the wellbore in the subterranean formation;

manipulating the proposed cement slurry formulation based on the normalized pressure so as to produce a fluid invasion resistant cement slurry;

wherein the properties of the proposed cement slurry formulation used to determine the normalized pressure are selected from the group consisting of;

mass balance;

momentum balance;

compressibility;

shrinkage;

shear rate;

rheological properties; and

any combinations thereof;

wherein the rheological properties are selected from the group consisting of;

shear stress;

relaxation time;

retardation time;

viscosity;

structural shear modulus;

structural viscosity;

steady shear flow;

steady-state viscosity;

consistency index;

power law index;

static yield stress;

dynamic yield stress;

steady-state viscosity of an unstructured state;

steady-state viscosity of a structured state;

equilibrium time; and

any combinations thereof;

introducing the fluid invasion resistant cement slurry into the wellbore in the subterranean formation; and

cementing the fluid invasion resistant cement slurry in the wellbore in the subterranean formation.

18. The method of claim 17, wherein the proposed cement slurry formulation comprises a base fluid and a cementitious material.

19. The method of claim 18, wherein the proposed cement slurry formulation further comprises a pozzolanic material;

a cement accelerator;

a cement retarder;

a fluid-loss additive;

a cement dispersant;

a cement extender;

a weighting agent;

a lost circulation additive;

or any combinations thereof.

20. The method of claim 17, wherein the properties of the wellbore in the subterranean formation used to determine the normalized pressure are selected from the group consisting of:

permeability;

capillary pressure;

swelling capacity;

stress;

well dimensions;

density of the formation; and

any combinations thereof.