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High-temperature-resistant high-density well cementation cement paste and preparation method thereof

A cementing slurry and high-density technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of high consistency, poor stability, cement slurry settlement, etc., and achieve large specific surface area, enhanced stability, The effect of reducing dosage

Pending Publication Date: 2022-04-22
JIAHUA SPECIAL CEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to overcome the defects and deficiencies in the above-mentioned prior art, the present invention provides a high-temperature-resistant high-density cementing cement slurry and its p

Method used

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  • High-temperature-resistant high-density well cementation cement paste and preparation method thereof
  • High-temperature-resistant high-density well cementation cement paste and preparation method thereof
  • High-temperature-resistant high-density well cementation cement paste and preparation method thereof

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Embodiment 1

[0056] As a preferred embodiment of the present invention, this embodiment discloses a high-temperature-resistant high-density cementing cement slurry. The specific composition of the cementing cement slurry is as follows:

[0057] 100 parts of oil well cement, 30 parts of high temperature reinforcing material, 3 parts of suspension stabilizer, 120 parts of density regulator, 2 parts of dispersant, 8 parts of fluid loss reducer, 3 parts of retarder, 0.2 part of defoamer, 60 parts of water . Take raw materials according to the specific composition ratio above, mix oil well cement, high temperature reinforcing material, density regulator and suspension stabilizer evenly, wet mix dispersant, fluid loss reducer retarder and defoamer with water, and finally follow GB / T 19139 to prepare cement slurry to obtain high temperature resistant cement slurry system. Among them, the density regulator is a mixture of 80 parts of hematite powder and 40 parts of micromanganese ore powder, and...

Embodiment 2

[0059] As another preferred embodiment of the present invention, this embodiment discloses a high-temperature-resistant high-density cementing cement slurry. The specific composition of the cementing cement slurry is as follows:

[0060] 100 parts of oil well cement, 30 parts of high temperature reinforcing material, 2 parts of suspension stabilizer, 95 parts of density regulator, 1.5 parts of dispersant, 5 parts of fluid loss reducer, 2 parts of retarder, 0.2 part of defoamer, 65 parts of water . Take raw materials according to the specific composition ratio above, mix oil well cement, high temperature reinforcing material, density regulator and suspension stabilizer evenly, wet mix dispersant, fluid loss reducer retarder and defoamer with water, and finally follow GB / T 19139 to prepare cement slurry to obtain high temperature resistant cement slurry system. Among them, the density regulator is a mixture of 90 parts of hematite powder and 5 parts of micromanganese ore powde...

Embodiment 3

[0062] As another preferred embodiment of the present invention, this embodiment discloses a high-temperature-resistant high-density cementing cement slurry. The specific composition of the cementing cement slurry is as follows:

[0063] 100 parts of oil well cement, 30 parts of high temperature reinforcing material, 1 part of suspension stabilizer, 60 parts of density regulator, 1 part of dispersant, 3 parts of fluid loss reducer, 1 part of retarder, 0.2 part of defoamer, 70 parts of water . Take raw materials according to the specific composition ratio above, mix oil well cement, high temperature reinforcing material, density regulator and suspension stabilizer evenly, wet mix dispersant, fluid loss reducer retarder and defoamer with water, and finally follow GB / T 19139 to prepare cement slurry to obtain high temperature resistant cement slurry system. Among them, the density regulator is a mixture of 55 parts of hematite powder and 5 parts of micromanganese ore powder, an...

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Abstract

The invention discloses high-temperature-resistant high-density well cementation cement and a preparation method thereof, and relates to the technical field of well cementation materials for oil and gas field development. The high-temperature-resistant high-density well cementation cement paste is prepared from the following raw materials in parts by weight: 100 parts of oil well cement; 30 parts of a high-temperature reinforcing material; 1-3 parts of a suspension stabilizer; 60 to 120 parts of a density regulator; 1-2 parts of a dispersant; 3-8 parts of a fluid loss agent; 1-3 parts of a retarder; 0.2 part of a defoaming agent; 60 to 70 parts of water; the suspension stabilizer is prepared from the following raw materials in parts by weight: 35-50 parts of fumed silica; 15 to 20 parts of polyaluminum ferric chloride; and 35 to 45 parts of attapulgite powder. The prepared cement paste is low in normal-temperature consistency, the consistency cannot be reduced along with temperature rising, the thickening curve of the cement paste is stable, the high-temperature strength of set cement can be effectively guaranteed, and the site construction requirement is met.

Description

technical field [0001] The invention relates to the technical field of cementing materials for oil and gas field development, in particular to a high-temperature-resistant high-density cementing cement slurry and a preparation method thereof. Background technique [0002] As oilfield exploitation enters the middle and late stages of development, shallow resources are greatly reduced. In order to meet the growing industrial needs, countries in recent years have increased the intensity of deep exploration and development. The drilling investment of deep and ultra-deep wells is huge, and the success or failure of cementing is directly related to the exploration results. It is necessary to do in-depth and meticulous research work from cementing technology to cementing materials. The cementing slurry system with good performance and stability is a high-temperature and high-pressure cementing key to success. In a high temperature environment, due to the high density and large amo...

Claims

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Application Information

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IPC IPC(8): C09K8/48C09K8/467
CPCC09K8/48C09K8/467
Inventor 赵峰曾雪玲龙丹古安林
Owner JIAHUA SPECIAL CEMENT