A cement slurry used in petroleum engineering

A technology for petroleum engineering and cement slurry, applied in the field of cement slurry, can solve the problems of difficulty in meeting high standard requirements, low compressive strength of cement slurry for plugging, etc., and achieve the effect of reducing internal frictional resistance

Active Publication Date: 2020-11-20
大庆天工开物能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the compressive strength of the plugging cement slurry in the above-mentioned patents is still low, and it is difficult to meet the market's requirements for high standards

Method used

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  • A cement slurry used in petroleum engineering
  • A cement slurry used in petroleum engineering
  • A cement slurry used in petroleum engineering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A cement slurry used in petroleum engineering consists of the following components by weight:

[0030] 100 parts of oil well G-grade cement, 6 parts of mixed nano-silica, 10 parts of liquid silicon, 24 parts of silicon powder, 8 parts of ultra-fine slag, 0.8 parts of dispersant, 0.8 parts of retarder, and 25 parts of water;

[0031] Wherein, the mixed nano-silica is composed of two different diameters of nano-silica I and nano-silica II with a mass ratio of 1:1, wherein the diameter of nano-silica I is 10-30nm, The diameter of the nano-silica II is 120-140nm; the state of use of the mixed-type nano-silica is nano-silica emulsion, and the solid content of the nano-silica emulsion is 15%.

[0032] Wherein, the dispersant is composed of dispersant A and boron modified succinimide according to a mass ratio of 1:1; wherein, the structural formula of dispersant A is:

[0033]

[0034] Wherein, m is an integer of 10-100, n is an integer of 10-100, p is an integer of 10-100...

Embodiment 2

[0044] A cement slurry used in petroleum engineering consists of the following components by weight:

[0045]100 parts of oil well G grade cement, 8 parts of mixed nano silica, 13 parts of liquid silicon, 26 parts of silicon powder, 10 parts of ultrafine slag, 1 part of dispersant, 1 part of retarder, 30 parts of water;

[0046] Wherein, the mixed nano-silica is composed of two different diameters of nano-silica I and nano-silica II with a mass ratio of 1:1, wherein the diameter of nano-silica I is 10-30nm, The diameter of the nano-silica II is 120-140nm; the state of use of the mixed-type nano-silica is nano-silica emulsion, and the solid content of the nano-silica emulsion is 15%.

[0047] Wherein, the dispersant is composed of dispersant A and boron modified succinimide according to a mass ratio of 1:1; wherein, the structural formula of dispersant A is:

[0048]

[0049] Wherein, m is an integer of 10-100, n is an integer of 10-100, p is an integer of 10-100, and the m...

Embodiment 3

[0059] A cement slurry used in petroleum engineering consists of the following components by weight:

[0060] 100 parts of oil well G grade cement, 10 parts of mixed nano silica, 15 parts of liquid silicon, 28 parts of silicon powder, 12 parts of ultrafine slag, 1.2 parts of dispersant, 1.2 parts of retarder, 35 parts of water;

[0061] Wherein, the mixed nano-silica is composed of two different diameters of nano-silica I and nano-silica II with a mass ratio of 1:1, wherein the diameter of nano-silica I is 10-30nm, The diameter of the nano-silica II is 120-140nm; the state of use of the mixed-type nano-silica is nano-silica emulsion, and the solid content of the nano-silica emulsion is 15%.

[0062] Wherein, the dispersant is composed of dispersant A and boron modified succinimide according to a mass ratio of 1:1; wherein, the structural formula of dispersant A is:

[0063]

[0064] Wherein, m is an integer of 10-100, n is an integer of 10-100, p is an integer of 10-100, a...

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Abstract

The invention relates to cement slurry for petroleum engineering. The cement slurry consists of the following components in parts by weight: 100 parts of oil well G-grade cement, 6-10 parts of mixed nano silica, 10-15 parts of liquid silicon, 24-28 parts of silicon powder, 8-12 parts of superfine slag, 0.8-1.2 parts of a dispersant, 0.8-1.2 parts of a retarder and 25-35 parts of water, wherein themixed nano silica consists of two nano silica I and nano silica II of different diameters in a mass ratio of 1:1; the diameter of the nano silica I is 10-30nm; the diameter of the nano silica II is 120-140nm; the use state of the mixed nano silica is a nano silica emulsion; and the solid content of the nano silica emulsion is 15%. The cement slurry provided by the invention is simple and convenient in preparation method, short in curing time, high in pressure strength and applicable to large-scale industrial production.

Description

technical field [0001] The invention relates to a cement slurry used in petroleum engineering. Background technique [0002] Lost circulation refers to the occurrence of various working fluids (drilling fluid, cement slurry, completion fluid and other liquids) entering the formation under the action of pressure difference during various operations of drilling, cementing, logging or workover. A downhole complex situation. In recent years, the workload of drilling in complex oil and gas reservoirs has gradually increased, and a series of problems caused by lost circulation have become increasingly prominent. At present, there are many plugging agents used, including bridging plugging agents, cement slurry plugging agents, and polymer chemical plugging agents. In the process of on-site plugging, cement is one of the most commonly used materials in drilling leak prevention and plugging, and its characteristic is that it has a high pressure bearing capacity after plugging the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/467
CPCC09K8/467
Inventor 不公告发明人
Owner 大庆天工开物能源科技有限公司
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