Описание продукта
Additive for self-healing of cement stone fractures Atren Recard is a mixture of active substances of different nature, which starts the process of self-healing fractures when interacting with water and fluid of the oil reservoir.
Over time, the cement sheath ages and brings down the well due to the formation of fractures or micro-gaps.
Atren Recad contains additives that react and/or swell upon contact with fluids (water, oil) in the bottom hole, blocking the formed channels.
Well cements are potentially exposed to several types of fluids during operation, including liquid and gaseous hydrocarbons, water and salt solutions and/or carbon dioxide, so this chemical acts under all fluid influences. When tested for compressive strength, cement compositions with additives, after five days, show stability or slight increase in pressure on the walls of the molds, compared with cement without additives.
Application
Used for self-healing of fractures formed in the cement stone.
Recommended consumption
From 2.5 to 5% bwoc. Delivery point and optimum dose are determined by laboratory and/or pilot tests for every specific use case.
Features
- Starts the process of self-healing of microfractures in the cement stone, that have formed, for example, after years of stress on the cement stone or after perforation or formation hydraulic fracturing;
- Causes recrystallization of the cement stone under the influence of water-based formation fluid;
- Swells at contact with hydrocarbons;
- Prevents penetration of fluid further into the cement body;
- Prevents loss of strength of the cement stone;
- Increases the service life of wells and reduces the risk of behind-the-casing flows;
- Environmentally friendly material.
