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Method for preparing corrosion-resistant anti-channeling agent for oil well cement

A technology of oil well cement and anti-channeling agent, applied in the field of cement, can solve the problems of low strength, no anti-corrosion properties, no high strength, etc., and achieve the effects of good compressive strength, delaying thickening time and easy operation.

Inactive Publication Date: 2017-12-01
四川宏升石油技术开发有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that when the existing anti-channeling agent is used under high pressure and high temperature, its strength is low, and it does not have good anti-corrosion properties. The method solves the problem that the existing oil well cement does not have high strength under high pressure and high temperature under the action of anti-channeling agent

Method used

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Embodiment

[0019] The present invention prepares the preparation method of anti-corrosion oil well cement anti-channeling agent, comprises the following steps:

[0020] (1) Calcium formate, sodium aluminate, mica, and kaolinite are crushed respectively, and then added in a grinder in proportion to grinding;

[0021] (2) Send the ground powder into the kiln, calcine at 1200-1800°C for 15-30 hours, and obtain clinker after cooling;

[0022] (3) Add styrene-butadiene rubber emulsion, butadiene-styrene, phosphate, sulfonate, and defoamer to the clinker, calcinate at 50-100°C for 15 minutes, and cool to room temperature;

[0023] (4) Add slag in proportion to step (3), mix evenly, and grind to a fineness of 400-500 mesh to obtain an oil well cement expansion agent.

[0024] in. Grind to a fineness of 450 mesh in the step (1). The calcination temperature in the kiln in the step (2) is 1590°C. The calcination time in the kiln in the step (2) is 26 hours. The calcining temperature in the st...

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Abstract

The invention discloses a method for preparing a corrosion-resistant anti-channeling agent for oil well cement. The method comprises the following steps: crushing calcium formate, sodium aluminate, mica and kaolinite separately, and then adding the crushed materials into a grinding machine for grinding; feeding a kiln with ground powder, carrying out calcining at 1200-1800 DEG C for 15-30 hours and then carrying out cooling so as to obtain a clinker; adding styrene-butadiene rubber emulsion, butadiene-styrene, phosphate, sulfonate and a defoaming agent into the clinker, carrying out calcining at 50-100 DEG C for 15 min and then carrying out cooling to room temperature; and adding slag in proportion, carrying out uniform mixing, and grinding the obtained mixture to a fineness of 400-500 meshes to obtain the anti-channeling agent for oil well cement.

Description

technical field [0001] The invention relates to the field of cement, in particular to a preparation method for preparing an anti-corrosion oil well cement anti-channeling agent. Background technique [0002] With the continuous deepening of oil and gas exploration and development, there are more and more wells with high pressure, salt-gypsum layer and easy channeling. The shrinkage of the volume makes the bonding quality of the cement sheath unguaranteed, and in severe cases, micro-gap may be formed, causing the formation fluid (oil, water, gas) to flow; the high filtration loss makes the cement slurry dehydrated and blocked during the construction process, making it impossible to continue cementing After the cement slurry filtrate enters the pores of the oil and gas layer, it will cause water sensitivity due to its incompatibility with the fluid in the formation, causing pollution of the oil and gas layer, affecting oil and gas production, and in severe cases, completely bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/467
CPCC09K8/467
Inventor 徐峰
Owner 四川宏升石油技术开发有限责任公司
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