Development of a corrosion monitoring system at the facilities of the second area of the Achimov deposits of the Urengoy oil, gas and condensate field

Aleksandr Y. Koryakin Gazprom dobycha Urengoy LLC Novy Urengoy referent@gd-urengoy.gazprom.ru
Dmitriy V. Dikamov Gazprom dobycha Urengoy LLC Novy Urengoy d.v.dikamov@gd-urengoy.gazprom.ru
Vladimir F. Kobychev Gazprom dobycha Urengoy LLC Novy Urengoy v.f.kobychev@gd-urengoy.gazprom.ru
Igor V. Kolinchenko Gazprom dobycha Urengoy LLC Novy Urengoy i.v.kolinchenko@gd-urengoy.gazprom.ru
Aleksandr D. Yusupov Gazprom dobycha Urengoy LLC Novy Urengoy a.d.yusupov@gd-urengoy.gazprom.ru
Abstract A large number of companies developing new gas condensate fields have faced the problem of carbon dioxide corrosion. The same occurs at the facilities of the second area of the Achimov deposits of Urengoy oil, gas and condensate field. Because of the lack of design solutions in terms of anticorrosive measures, specialists of Gazprom dobycha Urengoy LLC developed a system that includes several methods of corrosion monitoring. The article presents a scheme of monitoring of facilities exposed to carbon dioxide corrosion. All the implemented methods are described, and the results of the control are given. Materials and methods Gravimetric method of corrosion rate measurement, a method of corrosion rate measurement by measuring electrical resistance Results Each of the corrosion monitoring methods presented in this article separately does not cover all the relevant factors. The principle of superposition allows us to expand the boundaries of each corrosion monitoring method. The set of all applied methods allows safety operation of hazardous production facilities exposed to carbon dioxide corrosion. The corrosion monitoring system developed and introduced into production has shown its effectiveness for three years of constant operation and modernization. Continuous improvement of the methods included in the corrosion monitoring system allows continuous reducing of possible risk level of emergencies caused by a corrosive damage. Conclusions During the development and implementation of the corrosion monitoring system at the facilities of the second area of the Achimov deposits of the Urengoy oil, gas and condensate field, the following activities were implemented: 1. New gravimetric devices were developed and special locations for their installation were selected for infrastructure facilities of the gas condensate treatment plant developing Achimov deposits. 2. For the fi st time a measurement system of carbon dioxide corrosion rate in a gas-condensate medium by measuring the electrical resistance of the contact element installed in the pipeline (ER method).was tested at facilities of Gazprom dobycha Urengoy LLC. 3. The complex monitoring of parameters infl ing the intensity of carbon dioxide corrosion is organized: CO2 content, chemical composition of water, residual content of corrosion inhibitor, iron content in water, etc. 4. The main factors infl ing the rate of carbon dioxide corrosion under fi d conditions during the development of Achimov deposits were revealed. 5. A technology using a set of nondestructive methods of testing was developed for corrosion- prone areas subjected to maximum corrosion. 6. The concept of conducting an inspection of pipelines and equipment was revised. When planning, the intensity of corrosion was taken into account with allowance for the rates of corrosion obtained by gravimetric studies.
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corrosion monitoring corrosion monitoring system carbon dioxide corrosion corrosion control unit Achimov deposits