Low-temperature quick-setting grouting material for offshore oil wells and preparation method thereof

Abstract

The invention relates to a low temperature rapid hardening grouting material for an offshore oil well. The low temperature rapid hardening grouting material for the offshore oil well comprises the following raw materials in parts by weight: 2,000 parts of gel materials, 950-965 parts of inorganic mineral active materials, 25-35 parts of retarders, 5-10 parts of anti-freezing ingredients, 3-5 parts of high efficiency slushing agents, and 0.1-0.3 part of defoaming agents, wherein the gel materials are quick-hardening sulphate aluminium cement and oil well cement; the mass ratio of the quick-hardening sulphate aluminium cement and oil well cement is 5:5-8:2. The invention also provides a preparation method thereof. The grouting material is suitable for construction under a well cementation low-temperature environment, slurry can maintain better mobility and is high in early strength, the slurry is full without shrinkage, the long-term strength is high, and the well cementation construction time and the underground grouting environment parameter requirement are effectively ensured.

Description

technical field

[0001] The invention belongs to the field of building materials, and in particular relates to a low-temperature quick-setting grouting material applied to offshore oil well cementing and a preparation method thereof. Background technique

[0002] Although deepwater oil and gas resources have attracted the attention of the world due to their large reserves, high production capacity, and high returns, petroleum workers must face the high cost, high technology, and high risks that exist in deepwater oil and gas exploration and drilling. features. Deepwater drilling refers to drilling operations in sea areas with water depths exceeding 2000ft (609m), and the operating costs are high. Therefore, deepwater cementing technology has become a prerequisite and an important guarantee for efficient, economical and safe exploitation of deepwater oil and gas resources. At present, the drilling water depth in the deep water operation area (ocean) has exceeded 3000 m. As t...

Examples

experiment example 1

[0026] Weigh the raw materials according to the following proportions, 1000 parts by weight of commercially available quick-hardening sulfoaluminate cement, 1000 parts by weight of oil well cement, 965 parts by weight of mineral powder, 25 parts by weight of sodium tripolyphosphate, and 5 parts by weight of sodium nitrite. Foam agent 0.1 weight part, polycarboxylate superplasticizer powder 4 weight parts.

[0027] The commercially available rapid-hardening sulfoaluminate cement is selected from Tangshan Polar Bear Special Cement Co., Ltd.

[0028] Mix the raw materials of the grouting material in Example 1 with water according to the water-binder ratio of 0.38-0.40 to obtain the product.

experiment example 2、3

[0030] The raw materials and weight proportions of Examples 2 and 3 are shown in Table 1.

[0031]

Embodiment 3

[0032] The silicon powder described in Example 3 is selected from Gansu Sanyuan Silicon Materials Co., Ltd.

[0033] Mix the raw materials of Example 2 and Example 3 according to the proportion, and stir them evenly with water according to the water-binder ratio of 0.38~0.40 to obtain the grouting material.

technical field

[0001] The invention belongs to the field of building materials, and in particular relates to a low-temperature quick-setting grouting material applied to offshore oil well cementing and a preparation method thereof. Background technique

[0002] Although deepwater oil and gas resources have attracted the attention of the world due to their large reserves, high production capacity, and high returns, petroleum workers must face the high cost, high technology, and high risks that exist in deepwater oil and gas exploration and drilling. features. Deepwater drilling refers to drilling operations in sea areas with water depths exceeding 2000ft (609m), and the operating costs are high. Therefore, deepwater cementing technology has become a prerequisite and an important guarantee for efficient, economical and safe exploitation of deepwater oil and gas resources. At present, the drilling water depth in the deep water operation area (ocean) has exceeded 3000 m. As t...

Examples

experiment example 1

[0026] Weigh the raw materials according to the following proportions, 1000 parts by weight of commercially available quick-hardening sulfoaluminate cement, 1000 parts by weight of oil well cement, 965 parts by weight of mineral powder, 25 parts by weight of sodium tripolyphosphate, and 5 parts by weight of sodium nitrite. Foam agent 0.1 weight part, polycarboxylate superplasticizer powder 4 weight parts.

[0027] The commercially available rapid-hardening sulfoaluminate cement is selected from Tangshan Polar Bear Special Cement Co., Ltd.

[0028] Mix the raw materials of the grouting material in Example 1 with water according to the water-binder ratio of 0.38-0.40 to obtain the product.

experiment example 2、3

[0030] The raw materials and weight proportions of Examples 2 and 3 are shown in Table 1.

[0031]

Embodiment 3

[0032] The silicon powder described in Example 3 is selected from Gansu Sanyuan Silicon Materials Co., Ltd.

[0033] Mix the raw materials of Example 2 and Example 3 according to the proportion, and stir them evenly with water according to the water-binder ratio of 0.38~0.40 to obtain the grouting material.

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