«Onshore and offshore oil and gas well construction»

Microbiological corrosion at oil production facilities of "LUKOIL-PERM" LLC

UDC: 622.276
DOI: -

Authors:

¹ Ukhta State Technical University, Ukhta, Russia

Keywords: microbiological corrosion, sulfate-reducing bacteria, downhole pumping equipment, well contamination analysis

Annotation:

The authors of the article analyze wells contamination by sulfate-reducing bacteria which causes microbiological corrosion of oil and gas production and downhole equipment and pipeline systems of the Permian-Carboniferous reservoir of the Usinskoye field. When present in the oil reservoir, sulfate-reducing bacteria bring intensive processes of biogenic hydrogen sulfid deformation. In terms of the aggressive impact degree on oil production processes and the variety of forms of toxic and destructive action manifestation, hydrogen sulfide stands alone, and is the most dangerous one of the known stimulators of electrochemical corrosion. It was revealed that the products of 72 % of wells are contaminated. Steam cyclic treatments reduce contamination of well products with sulfate-reducing bacteria, but subsequently, when the ambient temperature decreases, the bacterial background is actively restored.

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