Study of the corrosion protection effect of the new composition based on gossypol resin in the hydrogen sulfide formation water

Abstract

We investigated the impact of a new composition (HS-1) composed of gossypol resin and IB-1 reagent taken in the ratio of 3:1 on the corrosion rate in the hydrogen sulfide formation water under laboratory conditions. Concentrations of 20, 40, 60 and 80 mg/l of the new composition were used. The formation water sample taken from well No. 1082 of "Bibiheybatneft" OGPD, SOCAR was used as an corrosion medium. The corrosion effects were also investigated at the concentrations of 50, 100, 150 and 200 mg/l of gossypol resin and 10, 15, 20 and 25 mg/l of IB-1 inhibitor. When the concentration of gossypol resin in the formation water increased by 50–200 mg/l, the corrosion protection effect took a value in the range of 60–82%. When the concentration of IB-1 inhibitor varied between 10–25 mg/l in a hydrogen sulfide medium, the protection effect was between 65–90%. Increasing the concentration of new HS-1 composition in the range of 30–80 mg/l resulted in an increase in its corrosion protection effect between 74–98%. It was found that the optimal consumption rate of gossypol resin, IB-1 inhibitor and HS-1 composition for corrosion protection in an aggressive medium with hydrogen sulfide was 200 mg/l, 25 mg/l and 80 mg/l, respectively.