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Inventories of and mitigation plans for inactive wells, temporarily plugged wells and permanently plugged and abandoned wells as referred to in Article 18. Part 1 1. Inventories of inactive wells, temporarily plugged wells, and permanently plugged and abandoned wells shall include at least the following elements:

(a) name and address of the operator, owner or licensee, as applicable;

(b) name, type and location of the well or well site, specifying whether it is an inactive well, temporarily plugged well or permanently plugged and abandoned well;

(c) where feasible, map showing the borders of the well or well site;

(d) results of quantification of methane emissions to air and to water carried out.

2. Inventories of inactive wells, temporarily plugged wells and permanently plugged and abandoned wells may include the following elements:

(a) dates for initial drilling and last operation;

(b) orientation (vertical, horizontal and slant);

(c) overall depth of the well;

(d) whether any notable events have occurred during the drilling process, such as ‘kicks’;

(e) whether the well has contacted gas containing significant amounts of sulphur compounds (sour gas), or trace amounts of sulphur compounds (sweet gas);

(f) seismic data available for the well in the upper 1 000 m of its trajectory with a radius of 1 000 metres;

(g) the most recent well integrity assessment report;

(h) whether the well is an exploration or production well;

(i) whether the well has contacted any shallow gas pockets, shallow gas zones or loss circulation zones;

(j) whether the well is located onshore (indicate urban, rural or other) or offshore (indicate water depth);

(k) in the case of offshore wells, information regarding any conditions at the seabed which could assist methane migration up through the water column;

(l) information on the well’s lifecycle status (active, inactive, downhole plugged, surface decommissioned etc.);

(m) whether the well cap associated with a decommissioned well is vented.

3. With respect to permanently plugged and abandoned wells, inventories shall also include:

(a) the last known measurements or quantification of methane emissions to air and to water, if any;

(b) information showing that the relevant competent authority has attested that the well or well site in question meets the criteria set out in Article 2, point (40);

(c) documentation that is adequate to demonstrate that there are no methane emissions from the well or well site, including emission factor based or sample-based quantification or reliable evidence of permanent subsurface isolation in accordance with ISO 16530-1:2017 standard:

(i) for all wells permanently plugged and abandoned on or after 3 August 1994;

(ii) where available, for all wells permanently plugged and abandoned before 3 August 1994. Part 2 Mitigation plans for inactive wells and temporarily plugged wells shall include at least the following elements:

(1) the schedule of addressing each inactive well and temporarily plugged well, including the actions to be carried out;

(2) name and address of the operator, owner or licensee of the inactive well or temporarily plugged well, as applicable;

(3) projected end date of remediation, reclamation or plugging of inactive wells and temporarily plugged wells.