CHIKWE TEMPLE NWOBURUIGWE
J. Chem. Res. Adv., 04 (02):19-25
CHIKWE TEMPLE NWOBURUIGWE : University OF Port Harcourt
Aim: This study was aimed to
characterize the anticorrosion and antiscale performances of production
chemicals (corrosion inhibitor and scale inhibitor) used in the crude oil
expedition line of an oil and gas facility which typically represents a
multiphase oil-water-gas system.
Method and Materials: The residual amine
and antiscale concentrations of produced water from crude oil obtained from an
oil and gas installation representing a multiphase oil-water-gas system were
analysed using a HACH Atomic Absorption Spectrometer (AAS). The corrosion
inhibitor used consist primarily of imidazoline while the scale inhibitor is
made up of poly phosphocarboxylic acid.
Results: Results of the
produced water obtained from the Medium Pressure (MP) Separator showed that the
residual amine at corrosion inhibitor concentrations of 15.0 – 20.0 mg/l were
within Environmental Guideline and Standards for Petroleum Industries in
Nigeria (EGASPIN) specification of 5.0 – 10 mg/l. Results of the produced water
obtained from the Low Pressure (LP) Separator shows that the residual antiscale
at scale inhibitor concentrations of 10.0 – 15.0 mg/l were within EGASPIN
acceptable limit of 5.0 – 10.0 mg/l..
Conclusion: It was concluded that concentrations of the
residual amine and antiscale of the produced water obtained from crude oil
samples provide useful information on the effectiveness of corrosion inhibitors
and scale inhibitors respectively.