Well-Abandonment Solutions Use Bismuth and Thermite Effectively and Safely

Traditional methods of abandoning a well by use of cement and bridge plugs are still common practice among most operators globally. Although resins have been used as an alternative, no major developments have been made in well-abandonment materials for nearly a century. This paper demonstrates a new way to create gas-tight seals during well abandonment, overcoming the limitations of traditional methods and reducing the operator’s liability and potential environmental impact after decommissioning has been completed.

Statement of Theory and Qualification Testing

Bismuth has multiple commercial uses outside of the oil and gas industry. The idea of using bismuth for sealing in downhole environments is not new; the earliest patents were filed in the 1930s.