High solid content cement slurry and preparation method thereof

A technology of high solid phase and cement slurry, which is applied in the field of cement slurry, can solve the problems of difficulty in ultra-high density cement slurry, large amount of weighting agent material, and low compressive strength of cement stone, so as to achieve shortened well construction period and good interlayer The effect of isolation and rapid strength development

Inactive Publication Date: 2011-07-20
邓天安
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  • Summary
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AI Technical Summary

Problems solved by technology

[0002] The use of high-density cement slurry for well cementing is becoming more and more frequent. The high-density cement slurry currently used is to increase the density of the cement slurry by increasing the liquid phase viscosity and the density of the weighting agent. This solution has its defects such as: ultra-high density The cement slurry is difficult to realize, the compressive strength of cement stone is low, the permeability of cement stone is high, the amount of weighting agent material is large, and the cost is relatively high compared with the cement slurry system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In the present embodiment, we adopt each component of following weight percent:

[0027] 33% oil well cement, 1.2% high solid phase fluid loss reducer for well cementing, 0.3% high solid phase dispersant for well cementing, 50% weighting agent, and 15.5% distilled water.

[0028] The preparation method of above-mentioned high solid cement slurry comprises the following steps:

[0029] Mix oil well cement, high solid phase fluid loss reducer for well cementing, and high solid phase dispersant weighting agent for well cementing in proportion to make a uniform powder;

[0030] The above powder and distilled water are used to prepare a slurry according to the API method to obtain a high-solid cement slurry.

Embodiment 2

[0032] In this example, we use the following components in weight percentage: 50% of oil well cement, 1.0% of high solid phase fluid loss reducer for well cementing, 0.5% of high solid phase dispersant for well cementing, 25% of weighting agent, Distilled water 23.5%.

[0033] The preparation method of above-mentioned high solid cement slurry comprises the following steps:

[0034] Mix oil well cement, high solid phase fluid loss reducer for well cementing, and high solid phase dispersant weighting agent for well cementing in proportion to make a uniform powder;

[0035] The above powder and distilled water are used to prepare a slurry according to the API method to obtain a high-solid cement slurry.

Embodiment 3

[0037] In this example, we use the following components in weight percentage: 73.3% of oil well cement, 1.0% of high solid phase fluid loss reducer for well cementing, 0.7% of high solid phase dispersant for well cementing, 0% of weighting agent, Distilled water 25%.

[0038] The preparation method of above-mentioned high solid cement slurry comprises the following steps:

[0039] Mix oil well cement, high solid phase fluid loss reducer for well cementing, and high solid phase dispersant weighting agent for well cementing in proportion to make a uniform powder;

[0040] The above powder and distilled water are used to prepare a slurry according to the API method to obtain a high-solid cement slurry.

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Abstract

The invention provides high solid content cement slurry and a preparation method thereof and relates to cement slurry used in the cementing project. The invention aims to effectively increase the density of cement slurry, increase the solid content of the cement slurry for cementing and save the weighting agent material. The technical scheme of the invention is that the cement slurry contains the following components according to proportions: oil-well cement, high solid content filtrate reducer for cementing, high solid content dispersant for cementing, expanding agent, defoaming agent, retarder, weighting agent and distilled water. The preparation method of the high solid content cement slurry comprises the following steps: adding retarder in distilled water to form stable and uniform solution which is set to be a component A; mixing oil-well cement, high solid content filtrate reducer for cementing, high solid content dispersant for cementing, expanding agent, defoaming agent, retarder and weighting agent according to the proportions to prepare uniform powder which is set to a component B; and mixing the component A with the component B according to a ratio, preparing slurry according to the air pollution index (API) method to obtain the high solid content cement slurry. The invention is mainly used in the cementing project.

Description

technical field [0001] The invention relates to a cement slurry used in cementing engineering, in particular to a cement slurry for oil and gas well cementing and a preparation method thereof. technical background [0002] The use of high-density cement slurry for well cementing is becoming more and more frequent. The high-density cement slurry currently used is to increase the density of the cement slurry by increasing the liquid phase viscosity and the density of the weighting agent. This solution has its defects such as: ultra-high density The cement slurry is difficult to realize, the compressive strength of cement stone is low, the cement stone permeability is high, the amount of weighting agent material is large, and the cost is relatively high compared with the cement slurry system. The API described in the following content refers to the "American Petroleum Institute" (hereinafter referred to as API). Contents of the invention [0003] The purpose of the present i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/48
Inventor 邓天安蒲军宏张珍李尧周成华张继尹陈永红
Owner 邓天安
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