Additives play a critical part in the oil and gas well-cementing process. Several cement additives have been developed for use in oil and gas well operations. For every type of cementing project, the necessary additive must be selected, as well as the correct amount applied, to formulate the ideal cement slurry.
All of these chemicals have many purposes and are roughly classed as follows:
- Accelerator
- Dispersants
- Extenders
- Fluid evaporation agents
- Retarders
Each of the aforementioned classifications has many additive categories that were intended to serve almost the same job while constructing cement slurry. However, a few additives from each category are frequently utilized in the design of cement slurry for oil/gas well-cementing operations.
Bisley International is a well-known distributor of raw materials that deals with a variety of products that may be required for the application of cement additives in the oil and gas well-cementing process.
All cement systems used in well cementing for oil and gas wells are specifically engineered to satisfy temperature ranges ranging from below sub-zero temperatures in permafrost zone locations.
It was only feasible to tolerate such broad differences in circumstances by manufacturing specific cement additives.
Various additives are available for improving the oil well slurry qualities and enabling effective placement between the geology and casing formations, quick compressive strength development, and acceptable zonal isolation over the lifespan of the oil and gas well.
Additives are typically included in cement compositions for the following reasons:
- To disperse cement particles.
- To change the setting time in the well under the specified temperature and pressure conditions
- To reduce filtering losses for liquids derived from cement slurry after and during installation.
- To account for cement shrinkage as it sets and hardens
- To increase the interfacial bonding of cement and casing
- To manage the entrance and movement of formation fluids into the cement column while it is setting.
Several types of cement additives have been developed to facilitate the use of cement in various oil and gas well applications. Each kind also includes distinct additives that have been created to serve almost identical functions throughout the cement slurry design.
However, there are a few additives under each of the primary kinds that are commonly utilized in the design of cement slurry for oil/gas well-cementing operations.
Although various types of additives are utilized to improve the performance of cement during oil and gas well cementing, a few typical additives are frequently employed throughout cementing operations.
