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Thickener and super high-density cement paste based on thickener

A technology of ultra-high density and densifier, applied in drilling compositions, chemical instruments and methods, etc., can solve the problem of insufficient density of cement slurry.

Active Publication Date: 2014-05-07
四川川庆井下科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a densifier and an ultra-high-density cement slurry based on the densifier, so as to solve the problem that the density of the existing cement slurry is not high enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Density at 90°C is 2.50g / cm 3 The ultra-high-density cement slurry is composed of a base formula and additives: the weight of the base formula consists of 100 parts of cement, 180 parts of ilmenite, 20 parts of a densifier, and a water-cement ratio of 0.27; In terms of percentage, the weight percentage of additives is composed of: 0.6% of fluid loss reducer, 0.2% of drag reducer, and 0.05% of retarder. The weight of said densifier consists of: 80-90 parts of iron ore powder, 5 parts of manganese ore powder -10 parts, G grade superfine cement 5-10 parts, micro silica fume 5-10 parts.

Embodiment 2

[0027] Density at 120°C is 2.50g / cm 3 The ultra-high-density cement slurry is composed of a base formula and additives: the weight of the base formula is 75 parts of cement, 25 parts of quartz sand, 170 parts of ilmenite, 30 parts of densifier, and a water-cement ratio of 0.26; In terms of the percentage of the total weight of the square, the weight percentage of additives is composed of: 0.8% of high temperature fluid loss reducer, 0.4% of drag reducer, and 0.1% of retarder, and the weight of said densifier is composed of: iron ore powder 80-90% 5-10 parts of manganese ore powder, 5-10 parts of G grade superfine cement, and 5-10 parts of microsilica fume.

Embodiment 3

[0029] Density at 90°C is 2.90g / cm 3 The ultra-high-density cement slurry is composed of a base formula and additives: the weight of the base formula consists of 100 parts of cement, 125 parts of a densifier, and a water-cement ratio of 0.2; in terms of the percentage of the total weight of the base formula, the weight of the additive The percentage composition is: 0.5% fluid loss reducer, 0.7% drag reducer, 0.05% retarder, and the weight composition of the densifier is: 80-90 parts of iron ore powder, 5-10 parts of manganese ore powder, G grade 5-10 parts of superfine cement, 5-10 parts of microsilica fume.

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Abstract

The invention discloses a thickener and a super high-density cement paste based on the thickener. The thickener comprises the following components in parts by weight: 80-90 parts of iron ore powder, 5-10 parts of manganese mineral powder, 5-10 parts of G-grade superfine cement and 5-10 parts of silica fume. The super high-density cement paste provided by the invention is stable in performance, and low in water loss, has certain anti-gas channeling ability and ideal thickening transition time, and can form strong set cement. A high-pressure hydrocarbon reservoir can be effectively controlled, jump-out of an oil gas is avoided, and the cementing quality can be better improved.

Description

technical field [0001] The invention belongs to the technical field of oil testing engineering, and in particular relates to a method for preparing an ultra-high-density cement slurry system in petroleum exploration and development. Background technique [0002] With the increasing drilling footage of deep wells and ultra-deep wells in complex formations, ordinary high-density cement slurry can no longer meet the needs of deep wells, ultra-deep wells and ultra-high pressure cementing operations. It is imperative to study ultra-high-density cement slurry systems. Therefore, the research on ultra-high-density cement slurry system is not only to meet the urgent needs of production, but also has very important practical significance. [0003] Domestic oil fields have basically formed 2.40g / cm 3 Using ordinary high-density cement slurry technology, but higher than 2.50g / cm 3 The density of ultra-high density cement slurry technology is limited by materials and basic theory, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/48C09K8/467
CPCC04B28/00C09K8/48C09K8/487C09K2208/28C04B18/12
Inventor 吴家明张作宏曾科许桂莉向娴武超常超杨国良刘华治
Owner 四川川庆井下科技有限公司
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