METHOD OF WELL ABANDONMENT

摘要

FIELD: oil-and-gas industry.SUBSTANCE: proposed method comprises well killing and making gastight partition. Proposed method comprises the following stages: cutting and removing of casting string section in interval of productive bed impermeable thickness. Removal of backfill opposite cut section. Borehole reaming via cut section with creation of annular cavity. Filling of said annular cavity and in-column space with barite pulp. Precipitation of barite pulp solid particles in said annular space. Barite pulp fluid features density to allows excess of column hydrostatic pressure over formation pressure.EFFECT: higher reliability and efficiency.