Influence of thermo-chemical treatment of wells to remove paraffin corrosion of oilfield equipment

Weighted hydrocarbon composition of oil (high content of waxes, resins and asphaltenes) and water cut due to the presence complicatesthe production factor - the formation of asphaltene deposits. In order to remove deposits in the oilfield equipment widely used thermo-chemical treatment of wells, whichis used for hot fresh water, influence the corrosion processes metal equipment by the presence of high dissolved oxygen.The article discusses the impact is applied fresh water on the corrosion rate in modeling the immediate processing of the well, and subsequently contacting the oil gathering system equipment with oxygen-containing formation water. Based on the results of the proposed optimization thermochemical treatments to reduce the corrosive effect of fresh water.
Materials and methods
Gravimetric method for determining the protective action of corrosion inhibitors.
Results
A sequence of process steps allowing increasing the effectiveness of corrosion protection of downhole pumping equipment during the thermochemical treatment of wells to remove paraffin.
Сonclusions
1. In carrying out the thermochemical treatment of wells to remove paraffin dramatically increases the rate of corrosion of oilfield equipment.
2. The use of an oxygen scavenger during the thermochemical treatment allows to reduce the aggressiveness of the liquid medium.
3. The combined use of an oxygen scavenger and corrosion inhibitor reduces the hydrogen sulfide corrosion processes and provides prolonged protection of oilfield equipment.