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A kind of high-strength, high-temperature-resistant, anti-erosion oil well cement and preparation method thereof

An oil well cement and high temperature resistant technology, applied in chemical instruments and methods, drilling compositions and other directions, can solve problems such as changes in the physical and chemical properties of cement slurry, bad bottom hole environment, oil field property losses, etc., and achieves low alkali content control, Reduced mixing process and remarkable effect of high temperature resistance

Active Publication Date: 2021-03-23
葛洲坝石门特种水泥有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the improvement of drilling technology and the increase of difficulty in oilfield production, drilling has developed into deep wells, ultra-deep wells, and complex wells. The temperature and pressure at the bottom of the well have increased significantly, and the environment at the bottom of the well has become worse. Oil well cement slurry thickens rapidly, which cannot meet the requirements of cementing construction. In severe cases, it will lead to "whole pump" accidents, which will bring huge property losses to the oil field. Moreover, under high temperature and high pressure, the physical and chemical properties of cement slurry will change significantly. , there are situations such as low temperature resistance, insufficient strength, and corrosion resistance, which will affect the cementing quality

Method used

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  • A kind of high-strength, high-temperature-resistant, anti-erosion oil well cement and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021]Example 1: A high strength and high temperature resistance to erosion well cement. According to the mass percentage: 50% high-resistance oil well, 10% of aluminum aluminate cement, 30% silicone sand, 4.5% phosphate, 5.5% silicon powder, 0.1% Lost agents, and 0.3 suspension %, Mixed polishing, can be made of high-strength resistance anti-erosion oil cement, where the slower is from the following mass percentage of raw materials: industrial starch, 20% industrial granulated sugar, 10% micro-silicon powder, phosphite 15% powder, 6% boron sand, 1% white carbon black 1% mixed and grinded to a specific surface area of ​​350-400m2 / kg. The cement physical properties of the present embodiment are shown in Table 1 Embodiment 1.

Embodiment 2

[0022]Example 2: A high strength and high temperature resistance anti-erosion oil well cement. According to the percentage of quality: 55% of G-level high anti-oil wells, 12% of phosphate cement cement, 25% silicone sand, 4.5% phosphote, 3.5% silicon powder, 0.3% loss of water, 0.35 %, After mixing, powder grinding, can be made high-strength resistance anti-erosion oil well cement, where the slower is from the following mass percentage of materials: 13% micro-silicon powder, 11% phospantine powder, 35% industrial starch, industry Sugar 30%, boron sand 7%, white carbon 4% of these raw materials is uniform and grinded to a specific surface area of ​​350-400m2 / kg. The cement physical properties of the present embodiment are shown in Table 1 Example 2.

Embodiment 3

[0023]Example 3: A high strength and high temperature resistance to erosion well cement. According to the percentage of mass: 60% of the G-level high anti-oil well, 10% of phosphate cement cement, 20% silicone sand, 5.0% phosphotin, 5.0% of the silicon powder, 0.2% loss of water loss, 0.5 %, After mixing, powder grinding, can be made high-strength resistant anti-erosion oil well cement, where is the hydrocarbon by weight of the following mass content: 15% micro-silicon powder, 10% phospantine powder, 30% industrial starch, industry 35% of the sugar, 7% boron sand, 3% of the white carbon black 3% of these raw materials is uniform and grinded to a specific surface area of ​​350-400m2 / kg. The cement physical properties of the present embodiment are shown in Table 1 Embodiment 3.

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Abstract

The invention discloses high-intensity and high-temperature-resistant anti-erosion oil well cement and a preparation method thereof. The high-intensity and high-temperature-resistant anti-erosion oilwell cement is mainly prepared from the following ingredients in percentage by mass through mixing: 50 to 60 percent of grade G high-resistant oil well clinker, 10 to 15 percent of aluminophosphate cement clinker, 20 to 30 percent of unbonded silica sand, 4.0 to 6.0 percent of phosphogypsum, 3.5 to 5.5 percent of silicon powder, 0.05 to 0.2 percent of fluid loss agents and 0.3 to 0.5 percent of retarders. Through the reasonable formula, on the basis of improving the cement intensity (under the conditions of 24h normal pressure and 300 DEG C, the intensity can reach a value being 53.0MPa or more), the thickening time (such as 90 to 120 min) can be effectively controlled; in addition, no special retarder and the like is added, so that the high-temperature-resistant performance of the cementis obvious; the use temperature can reach 300 DEG C; at 300 DEG C, the intensity is not influenced; a test body is complete and not damaged.

Description

Technical field[0001]The present invention relates to a high-strength high temperature resistance anti-erosion oil well cement and a preparation method thereof, belonging to the technical field of special cement preparation.Background technique[0002]Oil well cement is widely used in oil, natural gas exploration and production, and oil well cement is mainly used as a ring seal between the drilling inner wall and the steel sleeve in the construction process to separate the pressure of high pressure and stress. The success of the drilling plays an important role. With the improvement of drilling technology, the difficulty of oilfield mining, drilling to deep wells, ultra-deep wells, complex well development, the bottom of the bottom, the bottom of the bottom, the bottom of the bottom, the direct performance is under high temperature and high pressure, in the well The rapid thickening of oil well cement sluries, meets the requirements of cementing construction, which causes "whole pump"...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/34C04B24/38C09K8/467C04B103/22
CPCC04B28/344C04B40/0039C04B2103/22C04B2201/50C09K8/467C04B14/06C04B22/144C04B18/146C04B2103/46C04B24/38C04B24/10C04B22/06C04B22/0013
Inventor 程海平龙继承皮光忠
Owner 葛洲坝石门特种水泥有限公司