High-temperature-resisting thermal recovery cement and preparation method thereof

A warm and high-resistant technology, applied in the field of thermal recovery cement and its preparation, can solve the problems affecting the production life of heavy oil thermal recovery wells, high temperature strength decline, permeability increase, etc., to achieve strong production controllability, high strength The effect of not fading and overcoming the decline in compressive strength

Active Publication Date: 2014-05-21
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most of the cementing cement systems used in heavy oil thermal recovery wells add external admixtures to the cement to solve the defects of high temperature resistance of the cement itself. However, the cement system still suffers from a

Method used

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  • High-temperature-resisting thermal recovery cement and preparation method thereof

Examples

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Example Embodiment

[0018] Example 1:

[0019] Weigh 55 parts by weight of aluminate cement clinker, 10 parts by weight of phosphate rock slag, and 30 parts by weight of slag, mix them, and then pour them into a ball mill for grinding. The mixed powder is ground to a Blaine specific surface area of ​​250m 2 / kg, add 1 weight part of ceramic fiber and 2 weight parts of rubber powder, mix for 10 minutes, and then heat mining cement is made.

Example Embodiment

[0020] Example 2:

[0021] Weigh 65 parts by weight of aluminate cement clinker, 30 parts by weight of phosphate rock slag, and 10 parts by weight of slag, mix them, then pour them into a ball mill for grinding, and grind the mixed powder until the Blaine specific surface area is 260m 2 / kg, add 3 parts by weight of ceramic fiber and 3 parts by weight of rubber powder, mix for 10 minutes, and then heat the cement to make it.

Example Embodiment

[0022] Example 3:

[0023] Weigh 65 parts by weight of aluminate cement clinker, 30 parts by weight of phosphate rock slag, and 20 parts by weight of slag, mix them, then pour them into a ball mill for grinding, and grind the mixed powder until the Blaine specific surface area is 270m 2 / kg, add 2 parts by weight of ceramic fiber and 2 parts by weight of rubber powder, mix for 10 minutes, and then heat the cement to make it.

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Abstract

The invention discloses high-temperature-resisting thermal recovery cement and a preparation method thereof. The thermal recovery cement comprises the following components in parts by weight of 55-65 parts of aluminate cement grog, 10-30 parts of phosphorite dregs, 10-30 parts of slags, 1-3 parts of ceramic fibers and 1-3 parts of rubber powder. The preparation method comprises the following steps of weighing the aluminate cement grog, the phosphorite dregs and the slags, mixing so as to obtain a mixing powder body, pouring the mixing powder body into a ball mill for grinding until the specific surface area of 250-300m<2>/kg is achieved, adding the ceramic fibers and the rubber powder, and stirring for ten minutes in a mixing manner to obtain the high-temperature-resisting thermal recovery cement. The high-temperature-resisting thermal recovery cement and the preparation method thereof provided by the invention have the advantages that an engineering property of the thermal recovery cement is easy to regulate, and the intensity is high under the low temperature; for a cement stone made of the thermal recovery cement, an excellent high temperature resistance property is realized, the intensity is not decayed when the formed hardened cement is subjected to the high temperature, the permeability is not increased, the thermal recovery cement has the certain tenacity, the well-cementing requirement of a thick oil thermal production well is met, a principle of the preparation method is reliable, the operation is simple and convenient, and the production cost is low.

Description

technical field [0001] The invention relates to a thermal recovery cement used in heavy oil thermal recovery well cementing in oil and gas exploration and development and a preparation method thereof. Background technique [0002] Heavy oil resources account for more than 70% of the world's remaining oil resources, and its reserves have far exceeded conventional crude oil. Heavy oil recovery is dominated by thermal oil recovery. During thermal oil recovery, the steam temperature is usually as high as 300°C to 350°C, and when the oil layer is burned, the temperature will exceed 400°C. At such a high temperature, the compressive strength of the oil well cement sheath around the wellbore declines, the permeability increases, the stability and homogeneity are destroyed, and the high temperature resistance performance declines sharply. The currently used cementing cement system for heavy oil thermal recovery wells is mostly to add external admixtures to the cement to solve the h...

Claims

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Application Information

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IPC IPC(8): C04B7/32
Inventor 程小伟李早元郭小阳李明刘健罗洪文韦庭丛罗解龙丹王凯
Owner SOUTHWEST PETROLEUM UNIV
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