Development of a Versatile Corrosion Inhibitor for Multiple Oil and Gas Operating Environments

摘要

Corrosion inhibition is often the preferred choice of internal corrosion control of carbon steel pipelines and downhole tubulars for many oil and gas operators.The selection of a corrosion inhibitor(CI)is often system dependent because a CI that performs well under one set of conditions may not always do so under another.Thus,throughout the world a huge number of CI products are available and deployed to attend to the wide and varied operating environments encountered in the oil and gas industry to mitigate carbon steel corrosion.Consequently,this often requires operators to have to handle numerous chemical products to treat different fields and/or to replace CIs for the same asset as the field conditions change over time.Since this can pose challenges to operators from a logistical viewpoint,it is advantageous for a CI to have a wide window of operability in order to help reduce the number of products an operator must manage.An R&D effort focused on the development of a highly versatile CI product which has been specifically formulated using a unique backbone of chemistries to inhibit carbon steel corrosion in a broad range of operating environments.Furthermore,the CI has beneficial product attributes to enable it to be handled and applied in many regions of the world via various application methods.Through several examples,this paper demonstrates the high level of corrosion inhibition performance and adaptability of the newly developed continuous CI product under several simulated field laboratory testing conditions including at low and high wall shear stress,using sweet and sour gas mixtures and differing brine compositions and temperatures.The new product also demonstrates favorable physical and secondary properties in terms of low foaming and emulsion tendency,good product stability at various temperatures as well as passing key assessments for application via umbilical and downhole capillaries.