BioSqueeze® Eliminates Bradenhead Pressure in a Well Prior to Abandonment

Tags: P&A

Jul 21, 2022

CHALLENGE

Bradenhead Pressure in a Well Slated for Abandonment



BioSqueeze Inc. was contracted by an operator in Colorado to eliminate bradenhead pressure in a well slated for abandonment. Prior to our arrival, the well was prepared by perforating at 2,880 ft (gas source), 2,270 ft (channeling), and 870 ft (50 ft below surface casing shoe) through the 4-1/2 in casing string.

APPROACH

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A bridge plug was set at 2,885 ft and 2-3/8 in tubing was run to the deepest perforation. Three injection sequences were conducted at 2,880 ft, the source of the gas. The initial flow rate was 2.7 gpm and at the conclusion of the third sequence had been reduced to 0.3 gpm, an 88.9% decrease.

Tubing was then tripped and a bridge plug was set at 2,315 ft. A single injection sequence was conducted at 2,270 ft, an area with significant channeling. The initial flow rate was 0.8 gpm and at the conclusion of the sequence had fallen to 0.1 gpm, an 87.5% decrease.

Tubing was then pulled and a bridge plug was set at 900 ft. Two injection sequences were conducted at 870 ft, 50 ft below the surface casing shoe. The initial flow rate was 0.60 gpm and at the conclusion of the second sequence had been reduced to 0.05 gpm, a 91.7% decrease.

RESULTS

Bradenhead Pressure Permanently Eliminated
Table

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