BioSqueeze® on “Difficult” Plug and Abandon Well

Tags: P&A

Mar 09, 2022

CHALLENGE

Well with a History of Unsuccessful Attempts to Eliminate High Bradenhead Pressure

BioSqueeze Inc. was contracted by an operator in the DJ Basin of Colorado to remediate high bradenhead pressure (sustained annular pressure) on a well slated for abandonment. The operator had been attempting to plug this well for over three years to no avail. Unsuccessful remediation efforts included numerous cement squeezes, micro-fine cements, resins, and an attempt to pull the casing. After all these attempts and well over $1 million spent on remediation efforts, bradenhead pressure remained high.


Bio Squeeze Figure 1 Chart 1024x968

THE SOLUTION

Bradenhead Pressure Completely Eliminated, Well Cut & Capped

BioSqueeze Inc. performed BioSqueeze®s on this well at two different depths. The first BioSqueeze® produced significant formation of crystalline calcium carbonate, as shown in Figure 1, resulting in reduced bradenhead pressure but not fully eliminate gas migration in the well. The operator indicated that there was evidence of gas coming into the annulus near the surface casing shoe, and received permission to perform a second BioSqueeze® closer to the shoe.

During this BioSqueeze®, pumping at constant pressure caused the injection rate to drop, as shown in Figure 2, indicating sealing of fractures and micro-annuli in the cement. The second BioSqueeze® permanently sealed the well, as shown in Figure 1, completely eliminating bradenhead pressure and allowing the well to be subsequently cut and capped. Earlier use of BioSqueeze® would have saved hundreds of thousands of dollars.

Injection Graph

Download This Study

Enter your name and email below to download this case study.

View Some Of Our Other Case Studies

BioSqueeze® Eliminates Bradenhead Pressure in a Well Prior to 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.

Tags: P&A

BioSqueeze® Mitigates Casing Pressure, Allowing Permanent Abandonment

BSI was contracted to mitigate casing pressure on a well being plugged in Pennsylvania.

Tags: P&A

BioSqueeze® Seals Leaking Gas on a Recently Plugged Storage Well

BioSqueeze Inc. was contracted by a company to mitigate an annular vent in a gas storage well in the process of being plugged.

Tags: P&A | Gas Storage

WANT TO LEARN MORE?