Single blended cement system for use at wide ranges of density and temperatures

Patent metadata

Field	Value
Publication number	US-10370294-B2
Application number	US-201715839938-A
Country	US
Kind code	B2
Filing date	Dec 13, 2017
Priority date	Dec 13, 2017
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

A method of cementing a wellbore penetrating a subterranean formation comprises blending a base cement slurry with one or more liquid additives to provide a cementing composition, the base cement slurry comprising a liquid carrier, a class G cement or a blend of class G and class C cements as defined by the American Petroleum Institute (API) Specification 10A standards (R2015), and silica fume, or fumed silica, or a combination of silica fume and fumed silica, the base cement slurry having a density of about 14 to about 16 ppg; and injecting the cementing composition into the wellbore. The single base cement slurry can be used globally to make cementing compositions having wide ranges of density and temperature stability.

First claim

What is claimed is:

1. A method of cementing a wellbore penetrating a subterranean formation, the method comprising:
blending a base cement slurry with one or more liquid additives to provide a cementing composition,
the base cement slurry comprising
a liquid carrier;
a class G cement or a combination of a class G and class C cements;
silica fume, or fumed silica, or a combination of silica fume and fumed silica,

the base cement slurry having a density of 14 to 16 ppg; and
injecting the cementing composition into the wellbore,
wherein the one or more of the liquid additives comprise a heavy weight liquid additive comprising (1) about 100 to about 200 wt % of cerium oxide; or about 300 to about 500 wt % of manganese oxide, (2) water; and (3) 0.5 to 2 wt % of a diutan gum, each by weight of the water in the heavy weight liquid additive, the heavy weight liquid additive having a density of about 20 to about 24 ppg.

2. The method of claim 1 , wherein the base cement slurry comprises about 1 to about 10 wt % of the fumed silica or silica fume or a combination of the fumed silica and silica fume, each based on the total weight of the base cement slurry.

3. The method of claim 2 , wherein the base cement slurry comprises water, class G cement, about 1 to about 10 wt % of kaolinite clay, and about 3 to 7 wt % of silica fume or fumed silica or a combination thereof, each based on the total weight of the base cement slurry.

4. The method of claim 2 , wherein the base cement slurry comprises water, a blend of class G and class C cements having a weight ratio of about 5:1 to about 3:1, and about 3 to 7 wt % of silica fume or fumed silica or a combination thereof, each based on the total weight of the base cement slurry.

5. The method of claim 1 , wherein the heavy weight liquid additive further comprises a dispersant.

6. The method of claim 1 , wherein the heavy weight liquid additive comprises about 100 to about 200 wt % of cerium oxide and about 0.5 to 2 wt % of the diutan gum, each by weight of the water in the heavy weight liquid additive.

7. The method of claim 1 , wherein the heavy weight liquid additive comprises about 300 to about 500 wt. % of manganese oxide and 0.5 to 2 wt % of the diutan gum, each by weight of the water in the heavy weight liquid additive.

8. The method of claim 1 , wherein the liquid additive further comprises a retarder, accelerator, fluid loss additive, foam preventer, or a buffering agent.

9. The method of claim 1 , wherein the base cement slurry is not directly blended with any solid additive.

10. The method of claim 1 , wherein the cementing composition has a density of about 11 to about 18 ppg.

11. The method of claim 1 , wherein the cementing composition has a temperature stability range of about 40° C. to about 350° C.

12. A method of cementing a wellbore penetrating a subterranean formation, the method comprising:
blending a base cement slurry with one or more liquid additives to provide a cementing composition,
the base cement slurry comprising
a liquid carrier;
a class G cement or a combination of a class G and class C cements;
silica fume, or fumed silica, or a combination of silica fume and fumed silica,

the base cement slurry having a density of 14 to 16 ppg; and
injecting the cementing composition into the wellbore;
wherein the one or more liquid additives comprise a light weight liquid additive comprising (1) about 30 to about 50 wt % of a glass sphere, (2) about 0.5 to about 2 wt % of a diutan gum, and (3) water by weight of the water in the light weight liquid additive, the liquid weight liquid additive having a density of 5 to 7.

13. The method of claim 12 , wherein the glass sphere is a borosilicate glass sphere.

14. A method of cementing a wellbore penetrating a subterranean formation, the method comprising:
blending a base cement slurry with one or more liquid additives to provide a cementing composition,
the base cement slurry comprising
a liquid carrier;
a class G cement or a combination of a class G and class C cements;
about 1 to about 10 wt % of kaolinite clay,
about 3 to 7 wt % of silica fume, or fumed silica, or a combination of silica fume and fumed silica,

the base cement slurry having a density of 14 to 16 ppg; and
injecting the cementing composition into the wellbore,
wherein the one or more liquid additives comprise a silica suspension liquid additive which comprises (1) 20 to 40 wt % of silica flour, (2) 20 to 40 wt % of silica sand, (3) a diutan gum, and (4) 20 to 40 wt % % water each based on the total weight of the silica suspension liquid additive.

15. The method of claim 14 , wherein the base cement slurry is free of silica sand and silica flour; and the base cement slurry is blended with the silica suspension liquid additive in an amount such that the cementing composition has a target cement performance in a high temperature well environment.

Assignees

• Dighe Shailesh Shashank
• Bryant Shannon E
• Kellum Matthew
• Dean Gregory D
• Bottiglieri Antonio
• Baker Hughes A Ge Co Llc

Inventors

• Dighe Shailesh Shashank
• Bryant Shannon E
• Kellum Matthew
• Dean Gregory D
• Bottiglieri Antonio

Classifications

• E21B33/14

  for cementing casings into boreholes · CPC title

• C04B7/00

  Hydraulic cements (calcium sulfate cements C04B11/00) · CPC title

• C09K8/46

  containing inorganic binders, e.g. Portland cement · CPC title

• C04B14/106 Primary

  Kaolin · CPC title

• C04B14/062

  Microsilica, e.g. colloïdal silica (preparing microsilica slurries or suspensions C04B18/148) · CPC title