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A kind of cementing cement for high temperature deep well and its preparation method and application

A technology for cementing cement and oil well cement, applied in the field of oil drilling, can solve problems such as long-term strength decline, and achieve the effects of prolonging the life of oil wells, improving thermal stability, and ensuring long-term sealing integrity

Active Publication Date: 2021-11-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the above-mentioned defects in the prior art, the present invention provides a cementing cement for high-temperature deep wells, which has a very outstanding ability to resist strength decline, and can solve the problem of high-temperature deep wells with cement stones in the range of 150°C to 200°C. The problem of severe long-term strength degradation in hydrothermal environments

Method used

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  • A kind of cementing cement for high temperature deep well and its preparation method and application
  • A kind of cementing cement for high temperature deep well and its preparation method and application
  • A kind of cementing cement for high temperature deep well and its preparation method and application

Examples

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Effect test

Embodiment 1

[0048] This example provides a cementing cement for high-temperature deep wells, and its specific components and corresponding weight parts are shown in Table 1.

[0049] Table 1 The formula of cement for high temperature deep well

[0050]

[0051] According to the ratio in Table 1, add the above-mentioned components into the ash mixing equipment, and fully mix them evenly to obtain the cementing cement for ultra-high temperature deep wells.

Embodiment 2

[0053] This example provides a cement for high-temperature deep wells, and its specific components and corresponding weight parts are shown in Table 2.

[0054] According to the formula in Table 2, each component is added in proportion to the ash mixing equipment, and fully mixed evenly to obtain cementing cement for ultra-high temperature deep wells.

[0055] Table 2 The formula of cementing cement used in high temperature deep well

[0056]

Embodiment 3

[0058] This example provides a cementing cement for high-temperature deep wells, and its specific components and corresponding weight parts are shown in Table 3.

[0059] Table 3 The formulation of cement for high temperature deep well

[0060]

[0061] According to the above ratio in Table 3, add each component into the ash mixing equipment, and fully mix evenly to obtain cementing cement for ultra-high temperature deep wells.

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Abstract

The invention provides a cementing cement for high-temperature deep wells, a preparation method and application thereof. The cementing cement for high-temperature deep wells includes the following components by weight: oil well cement: 100 parts, anti-strength decay agent: 30-60 parts, anti-strength decay aid: 10-20 parts and high-temperature enhancer: 5 parts ~15 parts; wherein, the anti-strength fading agent is one or both of silica fume and microsilicon; the anti-strength fading additive is one or more of kaolin, zeolite, wollastonite and diatomaceous earth; high temperature enhancement The agent is selected from nano-bentonite, nano-TiO 2 and nano Fe 2 o 3 one or more of. The cementing cement for high-temperature deep wells provided by the present invention can solve the problem that the long-term strength of existing cementing cement stones will seriously decline under the hydrothermal environment of high-temperature deep wells at 150°C to 200°C, thereby realizing effective isolation between layers , to ensure the long-term sealing integrity of the wellbore cement sheath and prolong the life of the oil well.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling, and in particular relates to a cementing cement for high-temperature deep wells, a preparation method and application thereof. Background technique [0002] Well cementing is the process of injecting cement into the annular space between the casing and the formation and solidifying to form a cement sheath. The purpose is to use the cementation and hardness of the cement sheath to achieve effective interlayer isolation, support and protection of the formation. Pipe, so as to ensure the long-term sealing integrity of the wellbore and prolong the life of the oil well. [0003] Good long-term wellbore integrity is of great significance to the normal and sustained production of oil wells. With the deepening of oil and gas exploration, the number of wells drilled in complex oil and gas reservoirs such as deep wells and ultra-deep wells is increasing, and high-temperature deep wells with bot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C09K8/467
CPCC04B28/026C04B2111/00008C04B2111/00724C04B2201/50C09K8/467C04B18/146C04B14/047C04B14/106C04B14/08C04B14/104C04B14/305
Inventor 艾正青李鹏晓李宁袁中涛何思龙曾建国张峰刘爱萍周波夏元博高海洋石凌龙刘忠飞邹双王中丽王银东徐力群余纲黎泽寒
Owner PETROCHINA CO LTD
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