Corrosion Inhibition of Tubing Steel during Acidization of Oil and Gas Wells

Sumit Kumar,P N Yadav,M Yadav,Simt Kumar,Premanand N Yadav

doi:10.1155/2013/354630

Abstract

Acidization is an oil reservoir stimulation technique for increasing oil well productivity. Hydrochloric acid is used in oil and gas production to stimulate the formation. The acid treatment occurs through N80 steel tubes. The process requires a high degree of corrosion inhibition of tubing material (N80 steel). In the present investigation effect of synthesized amino acid compounds, namely, acetamidoleucine (AAL) and benzamidoleucine (BAL) as corrosion inhibitors for N80 steel in 15% HCl solution was studied by polarization, AC impedance (EIS), and weight loss measurements. It was found that both the inhibitors were effective inhibitors and their inhibition efficiency was significantly increased with increasing concentration of inhibitors. Polarization curves revealed that the studied inhibitors represent mixed type inhibitors. AC impedance studies revealed that charge transfer resistance increases and double layer capacitance decreases in presence of inhibitors. Adsorption of inhibitors at the surface of N80 steel was found to obey Langmuir isotherm.

Highlights

E corresponding author, Dr Yadav, said the scanning electron microscopy (SEM) work was outsourced but did not give details on where, when, or by whom this work was performed. e equipment is not described in this article
It is described as a “JEOL JSM- LA analytical scanning electron microscope” in [ ], and in [ ] it is described as a “Scanning Electron Microscope model SEM Jeol JSM- .” ese are not the same models of microscope, despite these articles sharing some of the same SEM images
Dr Yadav provided us with replacement figures

Summary

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