1、 Application field
Acid fracturing thickener is mainly used in the development of carbonate reservoir. Due to the development of pores and fractures in carbonate reservoir and high formation temperature, in order to ensure the effect of acid fracturing transformation, it is necessary to improve the penetration depth of acid fracturing fractures in the reservoir and improve the conductivity of acid etching fractures. Therefore, adding thickener in the acid fracturing system can delay the reaction speed between acid liquid and formation rocks, improve sweep coefficient, improve sand carrying capacity and reduce filtration loss, Achieve the purpose of increasing production and injection.
2、 Product characteristics
This product has good thermal stability, shear rheology, good filtration reduction and excellent compatibility. It is well compatible with most corrosion inhibitors, demulsifiers, iron ion stabilizers and anti swelling agents. It is easy to dissolve in water and acid. At the same time, the acid has high viscosity, which can effectively reduce the reaction speed between acid and carbonate formation, increase the acid treatment radius, improve the acidizing effect and improve the crude oil recovery.
3、 Product index
project | target |
appearance | White or off white powder or particles |
Solid content，% | ≥88.0 |
Cation degree | high |
molecular weight | middle |
Dissolution time，min | ≤60 |
8‰Concentration viscosity，mPa·s | ≥40 |
4、 Method of use
According to different reservoir geological characteristics, this product is used in combination with crosslinking agent and gel breaker in a certain proportion to form a fracturing fluid system. During the preparation process, it shall be ensured that there is no "fish eye", and the acid does not need to be heated. The preparation needs to be stirred for more than one hour, which can be added by the metering pump on the sand mixer during construction.
5、 Packaging, transportation and storage
The products are packed in paper plastic three in one composite bags, 25 kg each; It can also be customized according to user needs; The shelf life is 2 years. The product is easy to absorb moisture and should be stored in a cool, ventilated and dry warehouse.
