To resolve methane emissions challenges during a decommissioning programme, Interwell P&A's RockSolid turns out to be an ideal solution
The company had addressed such an issue during a Canada operation, when it was able to shut in a shallow methane gas source ejecting around 0.55 cu/m per day by installing a gas-tight barrier at 773mKB inside a competent caprock.
Effective sealing solution
The emission was initially isolated and later stopped, enabling a smooth delivery of the decommissioning programme. It was a result of a surface casing vent flow (SCVF) issue in a well, where two different gas sources were identfied following pre-intervention logging. The installation of the RockSolid barrier ensured that it was effectively sealed from the roots, allowing ongoing research to address the shallow source. This was shut off by the installed RockSolid that replaced the casing and cement, obstructing any hydrocarbon flow inside the borehole. As gas pockets above the barrier had bled off, the well decommissioning programme was carried out unhindered.
The RockSolid remains a sustainable plugging alternative.
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