Ammonium persulphate encapsulated gel breaker is commonly used as a gel breaker in fracturing of oil and gas wells. However, adding the gel breaker too early or too much will cause the viscosity of fracturing fluid to be lost in advance, thus affecting the fracture-making ability of fracturing fluid in situ work, and even resulting in early sand removal, resulting in the failure of work. However, adding too little will cause incomplete gel breaking, causing damage to the residue and retained liquid in the oil reservoir, and reducing the conductivity. The effect of fracturing will be affected. For this reason, encapsulated gel breaker came into being.
The encapsulated gel breaker is a new type of gel breaker developed in recent years. The advanced coating technology is used to generate a protective layer on the common gel breaker, and the breaking speed is controllable. It is mainly used for flowback and gel breaking in water-based fracturing of oil wells, especially in the fracturing of medium and deep oil wells. The effective components of the encapsulated gel breaker are released by the formation pressure extrusion. It has the advantage of high effective components, release completely, low toxic, thorough breaking, easy flowback and less residue. Compared with the conventional common gel breaker, its obvious advantage is preventing the fracture fluid viscosity from descending rapidly and failure of work. However, if the capsule’s quality can’t meet the demand, the excessive rapid release speed of the breaker would lead to the fracture fluid viscosity premature descending and inducing the failure of work.
At present, the main gel breaker used in domestic oil fields is the encapsulated gel breaker with ammonium persulphate as the capsule-core, because ammonium persulphate crystal is easy to absorb moisture, our company has developed a set of re-granulation production processing technology. At present, the oil wells are mainly with high temperature and high pressure and high depth, and new requirements on high temperature resistance and good slow release performance of encapsulated gel breaker are constantly raised. The common encapsulated gel breaker has failed to meet the oilfield construction work requirements. With the help of domestic authoritative research and technology, our company successfully developed ammonium persulphate encapsulated gel breaker with high temperature resistance and slow release speed. At present, the gel breaking effect and temperature resistance time have basically reached the peak compared with same capsule core products in China.
The release rate of encapsulated gel breaker is one of the main properties of the product. In situ application the pressure, temperature, PH and dunking time have a certain impact on the release speed of the encapsulated gel breaker, which is shown as follows: the release speed of encapsulated gel breaker increases with the increase of pressure and temperature; The release speed increased with the extension of dunking time, and the medium PH had a certain effect on the release speed of the encapsulated gel breaker.
Considering that the oilfield fracturing fluids are composed of thousands of oilfield chemicals, there are a wide variety of specific fracturing systems, and the ratio of each fracturing system is unique and confidential, resulting in different performance parameters of our products under different systems, so users such as oilfield or oilfield service companies need to put forward temperature resistance requirements and time requirements when purchasing products. We will provide several types of product samples under the corresponding conditions, and the users need to carry out system evaluation, we will select specific models according to the evaluation results.
Weifang Toption Chemical Industry Co.,ltd is a professional manufacturer and supplier of ammonium persulphate re-granulated encapsulated gel breaker, If you need or if you are interested in our products, please contact us.
Post time: Aug-15-2023