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Well cementing cement slurry and preparation method thereof

A cementing cement slurry and cement technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as economic loss, high brittleness, and failure of sealing performance, and achieve high impact resistance, flexural strength and Effects of compressive strength, lower elastic modulus, and increased deformation capacity

Inactive Publication Date: 2018-01-26
四川弘晟石油工程技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cement sheath of ordinary cementing slurry has low elasticity and high brittleness, and it bears the perforation impact of high-energy jet, the impact of large-scale fracturing and staged fracturing, and the impact of casing and drill bit when running casing and continuing drilling. When the cement sheath collides and impacts, the overall integrity of the cement sheath will be destroyed, resulting in the failure of the interlayer sealing performance in the later stage, which has potential safety hazards for oil and gas wells, especially high acid gas wells, in the later stage of stimulation measures and development and production, and cannot guarantee oil and gas wells. Safe production, causing huge economic losses

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a kind of cement slurry, which comprises the following components in parts by weight: 100 parts of cement, 1 part of elastic and tough material, 1 part of expansion agent, 5 parts of latex, 10 parts of density regulator, and early strength agent 1 part, 2 parts of fluid loss reducer, 1 part of drag reducer, 1 part of retarder, 20 parts of water.

[0026] The preparation method of above-mentioned cementing cement slurry comprises the following steps:

[0027] a. Dry-mix the elastic and tough material, latex, density regulator, early strength agent, fluid loss reducer, drag reducer and cement in the above parts by weight, and mix evenly to obtain a dry mixture;

[0028] b. Wet-mix the retarder, expansion agent and water, and mix evenly to obtain a wet mixture;

[0029] c. Add the dry mixture into the wet mixture and stir evenly to obtain cementing cement slurry.

Embodiment 2

[0031] The present embodiment provides a kind of well cementing cement slurry, and it comprises the following components in parts by weight: 100 parts of cement, 2 parts of elastic and tough material, 2 parts of expansion agent, 8 parts of latex, 30 parts of density regulator, early strength agent 2 parts, 3 parts of fluid loss reducer, 1 part of drag reducer, 3 parts of retarder, 30 parts of water.

[0032] The preparation method is the same as in Example 1.

Embodiment 3

[0034] This embodiment provides a kind of cementing cement slurry, and it comprises the following components in parts by weight: 100 parts of cement, 3 parts of elastic and tough material, 3 parts of expansion agent, 8 parts of latex, 50 parts of density regulator, early strength agent 2 parts, 6 parts of fluid loss reducer, 1 part of drag reducer, 8 parts of retarder, 60 parts of water.

[0035] The preparation method is the same as in Example 1.

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PUM

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Abstract

The invention discloses a well cementing cement slurry and a preparation method thereof, wherein the well cementing cement slurry comprises the following components in parts by weight: 100 parts of cement, 1-4 parts of an elastic toughness material, 1-4 parts of an expanding agent, 5-10 parts of a latex, 10-100 parts of a density regulator, 1-2 parts of an early strength agent, 2-8 parts of a filtration-reducing agent, 1-2 parts of a drag reducer, 1-10 parts of a retarder, and 20-80 parts of water. The prepared well cementing cement slurry not only has low elastic modulus, but also has high impact resistance and flexural strength as well as compressive strength.

Description

technical field [0001] The invention relates to the field of oil and gas well cementing engineering, in particular to a cementing cement slurry and a preparation method thereof. Background technique [0002] Cement slurry for ordinary well cementing is generally composed of water, cement, admixtures (fluid loss reducer, dispersant, retarder, etc.) and admixtures (fiber, micro silicon, etc.). The cement sheath of ordinary cementing slurry has low elasticity and high brittleness, and it bears the perforation impact of high-energy jet, the impact of large-scale fracturing and staged fracturing, and the impact of casing and drill bit when running casing and continuing drilling. When the cement sheath collides and impacts, the overall integrity of the cement sheath will be destroyed, resulting in the failure of the interlayer sealing performance in the later stage, which has potential safety hazards for oil and gas wells, especially high acid gas wells, in the later stage of stim...

Claims

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Application Information

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IPC IPC(8): C04B28/02C09K8/467
Inventor 王太聪
Owner 四川弘晟石油工程技术服务有限公司
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