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High temperature-resistance salt-resistance oil well cement filtrate reducer

A technology of oil well cement and fluid loss reducer, which is applied in the direction of drilling composition, chemical instruments and methods, etc., and can solve the problems of unsuitable ultra-deep well high temperature and saturated brine slurry system, etc.

Inactive Publication Date: 2010-04-28
山东胜油固井工程技术有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a high temperature resistant oil well cement agent fluid loss reducer, which solves the problem that the above prior art is not suitable for ultra-deep well high temperature and saturated brine slurry system

Method used

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Embodiment 2

[0010] Example 2. The Sembcorp 1 well is the deepest well developed in the eastern oilfields of China so far. The well temperature reached 210℃. Because of the presence of chloride ions in the rock below the well, the cementing design focused on the salt content in the cement slurry. Requirements-The salt content must reach 18%. According to the technical parameters, the fluid loss agent of the present invention is used to add 5% of the total volume to an 18% saturated brine mud system, and the mud loses water at 210°C The cementing process is controlled at 50ml. The construction is smooth, and the cementing quality is good after logging data verification.

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Abstract

The invention discloses a high temperature-resistance salt-resistance oil well cement filtrate reducer. The raw materials used in the production of the reducer comprise AMPS(2-acrylamido-2-methyl propane sulfonic acid), acrylic acid, acrylamide, sodium hydroxide, potassium persulfate and water in a mass part ratio of 32-36:2.5-3:12-15:4-6:0.3-0.5:120. The high temperature-resistance oil well cement filtrate reducer prepared according to the formula is applicable to all-grade cement in accordance with API standards; the additive amount of the reducer in a slurry system at a high temperature of 210 DEG C is 5 to 8 percent of the total volume of slurry; and the water loss rate in well cementation can be effectively controlled within 50ml.

Description

1. Technical Field [0001] The invention relates to a high-temperature and salt-resistant oil well cement fluid loss reducing agent used in oil field cementing. 2. Background technology [0002] At present, the oil well cement fluid loss reducing agent used in drilling and cementing is not suitable for ultra-deep well cementing. Because the temperature of ultra-deep wells is very high, between 180°-250°, the oil well cement used in general wells is now used for loss reduction Water agent is not suitable for high temperature and saturated salt cement slurry system (extra-deep wells must increase the proportion of mud). The oil well cement fluid loss additive reduces its viscosity under high temperature conditions and increases its water loss, which significantly reduces the cementing effect. 3. Summary of the invention [0003] The purpose of the present invention is to provide a high-temperature resistant oil well cement fluid loss reducer, which solves the problems of the above-me...

Claims

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Application Information

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IPC IPC(8): C09K8/487
Inventor 蔡涛秦怀侠王峰郑奇峰刘志超
Owner 山东胜油固井工程技术有限公司
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