Drilling reagents
FLODRILL™ series
Reagents for oil production have been used for many years to increase oil recovery (EOR, Enhanced Oil Recovery) to control the mobility of water introduced. Filling the polymer improves the efficiency of bulk cleaning, reduces the spill channeling and losses, increases oil production and lowers the cost of extracted oil.
Reagents for oil production of the FLOPAAM™ series from SNF are used in various areas of the oil industry to increase oil recovery, prepare drilling fluids, and strengthen well walls. For 15 years already, SNF has been developing a number of reagents for oil production. SNF holds a leading position in the production of oil recovery reagents. These products are designed to satisfy a wide range of conditions that occur in oil fields around the world.
Reagents for oil production are:
Polyacrylamide powder
Standard polyacrylamide SNF for DNA is a series of FLOPAAM™ S (solid). Molecular weight varies from <2 million to 22 million Dalton; anionic charge – from 0 to 100%. The molecular weight also depends on the degree of hydrolysis (the maximum molecular weight is about 40 mole%). They are available in the form of dry powders and in the form of emulsions.
Partially hydrolyzed polyacrylamide is used to control the mobility of the polymer stream since 1960. These are synthetic linear polymers from hydrolyzed acrylamide monomers. Molecules are flexible chain structures woven into disordered branches, which are also polyelectrolyte interacting with ions in solution.
The emulsion of polyacrylamide
SNF produces polyacrylamide in the form of emulsions having the same chemical properties as the powder. This polymer is known as the FLOPAAM™ E series.
Polyacrylamide emulsions are dispersions, also referred to as suspensions, a hydrogel of a water-soluble polymer in oil. These are two-phase heterogeneous systems containing several components. The hydrated polymer is in the form of microbeads with a diameter of 1 μm. These microbeads are dispersed in oil and stabilized by surfactants.
Although most polymer fillers use dry polymer powders, there are areas of specific conditions in which polymer emulsions must be used. Polymer aggregates (for example, used for coastal platforms) in the form of polymer emulsions may be more preferable due to pipelines, closed mixing cycles, ease of management and logistics. Emulsions of SNF polymers for EOR are available in 30% or 50% of the active ingredient systems. They are easy to use in the field when mixed in pipelines.
The conversion of emulsions in the field is simple and fast. Depending on the quality of the dilution water, the emulsion destroyer can be added under field conditions or included in the oil phase of the emulsion (self-inversion). For most EORs FLOPAAM™ emulsion applications are applicable as self-reversible, complete systems, with a reversing surfactant included in the manufacturing process.
Powdered sulphonated polyacrylamide
“Standard” polyacrylamides SNF have a better thermal stability than before (up to 90 ° C), due to the addition of antioxidants in the manufacturing process. At elevated temperatures (up to 120 ° C), sulfonated polyacrylamides are required. These are copolymers of acrylamide and acrylamidopropylsulfonic acid. In addition to thermal stability, they are more stable to divalent metal ions, such as Ca2 + and Mg2 +, present in strong brines and seawater. Although the molecular weight of these polymers is not as great as that of the FLOPAAM™ series, it can also reach 14 million daltons. They are also less adsorbed than hydrolysed polyacrylamides.
