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High-temperature-resistant tough well cementation cement slurry system

A technology of cementing slurry and high temperature resistance, applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of cement stone strength decline, insufficient toughness, etc., achieve small cement specific surface area, reduce the number and size of pores , the effect of high content

Active Publication Date: 2022-04-15
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the defects and deficiencies in the above-mentioned prior art, the present invention provides a kind of high temperature resistant toughness cementing cement slurry system, the purpose of the invention of the present invention is to solve The strength decline and insufficient toughness of cement stone under high temperature conditions

Method used

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Embodiment 1

[0033] As a preferred embodiment of the present invention, this embodiment discloses a high temperature resistant ductile cement slurry system, using low heat of hydration cement as the base cement, wherein C 2 S content ≥ 40%, specific surface area is 280-330m 2 / Kg, 7d heat of hydration ≤ 240kJ / kg; the specific components are shown in the table below:

[0034]

[0035] The high-temperature toughening material is polyetheretherketone resin; the high-temperature strength-stabilizing material is waste refractory brick powder, SiO 2 Content ≥ 95%, powder fineness ≥ 800 mesh. The organosilicon resin micropowder is white powder, the active substance content is >99%, and the powder fineness is >=800 mesh. The high temperature stabilizer is clay. Mix the raw materials according to the specific composition ratio in the above table, and prepare the cement slurry according to GB / T19139, and the cement slurry system with a water-cement ratio of 0.44.

Embodiment 2

[0037] As another preferred embodiment of the present invention, this embodiment discloses a high-temperature-resistant ductile cement slurry system, which uses low-heat-of-hydration cement as the base cement, wherein C 2 S content ≥ 40%, specific surface area is 280-330m 2 / Kg, 7d heat of hydration ≤ 240kJ / kg; the specific components are shown in the table below:

[0038]

[0039] The high-temperature toughening material is polyetheretherketone resin; the high-temperature strength-stabilizing material is waste refractory brick powder, SiO 2 Content ≥ 95%, powder fineness ≥ 800 mesh. The organosilicon resin micropowder is white powder, the active substance content is >99%, and the powder fineness is >=800 mesh. The high temperature stabilizer is clay. Mix the raw materials according to the specific composition ratio in the above table, and prepare the cement slurry according to GB / T19139, and the cement slurry system with a water-cement ratio of 0.44.

Embodiment 3

[0041] As another preferred embodiment of the present invention, this embodiment discloses a high-temperature-resistant ductile cement slurry system, which uses low-heat-of-hydration cement as the base cement, wherein C 2 S content ≥ 40%, specific surface area is 280-330m 2 / Kg, 7d heat of hydration ≤ 240kJ / kg; the specific components are shown in the table below:

[0042]

[0043] The high-temperature toughening material is polyetheretherketone resin; the high-temperature strength-stabilizing material is waste refractory brick powder, SiO 2 Content ≥ 95%, powder fineness ≥ 800 mesh. The organosilicon resin micropowder is white powder, the active substance content is >99%, and the powder fineness is >=800 mesh. The high temperature stabilizer is clay. Mix the raw materials according to the specific composition ratio in the above table, and prepare the cement slurry according to GB / T19139, and the cement slurry system with a water-cement ratio of 0.44.

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Abstract

The invention discloses a high-temperature-resistant tough well cementation cement slurry system, and relates to the technical field of well cementation materials for oil and gas field development. The well cementation cement slurry system is composed of the following raw materials in percentage by weight: 47-60 wt% of low hydration heat cement; 25 wt%-30 wt% of a high temperature strength stable material; 10 wt%-15 wt% of a high temperature strength reinforcing material; 2 wt%-5 wt% of a high-temperature toughening material; 2 wt% of a high-temperature stabilizer and 0.5 wt% of a dispersant; the high-temperature strength reinforcing material is a mixture formed by mixing silicon nitride micro powder and organic silicon resin micro powder; the high-temperature toughening material is polyether-ether-ketone resin. The high-temperature-resistant tough well cementation cement slurry system has the advantages of high-temperature strength recession resistance and high toughness, can effectively relieve the problems of strength recession and insufficient toughness of set cement under a high-temperature condition, and meets the requirements of oil and gas well cementation.

Description

technical field [0001] The invention belongs to the technical field of cementing materials for oil and gas field development, and more specifically relates to a high-temperature-resistant tough cementing cement slurry system. Background technique [0002] With the depletion of shallow oil and gas resources, the exploration and development of oil and gas resources are gradually moving to deep formations, and the number of deep wells and ultra-deep wells is increasing year by year. With the increase of the depth of oil and gas wells, the number of high-temperature deep wells and ultra-deep wells with a bottom-hole temperature exceeding 200 °C is gradually increasing, and higher requirements are put forward for the performance of cement slurry under high temperature and ultra-high temperature. Especially in the ultra-high temperature environment, many problems have been exposed in the domestic conventional silicate-sanded cement slurry system, especially the problems of high-te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/467
CPCY02W30/91
Inventor 赵峰曾雪玲古安林龙丹
Owner JIAHUA SPECIAL CEMENT
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