{"version":"1.0.0","snapshot":{"snapshotSha256":"7d6e677299352a7b989393edc6a851c0822df0e5f2355d2bd0f6d0b3c86192df","schemaVersion":4,"classificationVersion":"wellficent-source-purpose-v2","classificationSha256":"83e4157601b4d73cb883d6e8578f9fe1ea467bb929d96a74071d77068ee8ca48","shardCount":4},"filters":{"company":"PERENCO UK LIMITED"},"records":901,"sourceWellFamilies":618,"additionalFamilyRows":283,"purposeClassification":{"classified":901,"unclassified":0,"ruleVersion":"wellficent-source-purpose-v2","ruleSha256":"83e4157601b4d73cb883d6e8578f9fe1ea467bb929d96a74071d77068ee8ca48","kind":"derived-from-source-purpose","independentOutcomeLabel":false},"fields":{"operator":{"present":653,"missing":248,"missingFraction":0.27524972253052166},"sourceStatus":{"present":901,"missing":0,"missingFraction":0},"spudDate":{"present":901,"missing":0,"missingFraction":0},"measuredDepthM":{"present":862,"missing":39,"missingFraction":0.04328523862375139}},"catalogues":[{"catalogue":"uk-nsta-offshore","records":638,"sourceWellFamilies":470,"unclassifiedPurpose":0,"fields":{"operator":{"present":638,"missing":0,"missingFraction":0},"sourceStatus":{"present":638,"missing":0,"missingFraction":0},"spudDate":{"present":638,"missing":0,"missingFraction":0},"measuredDepthM":{"present":637,"missing":1,"missingFraction":0.001567398119122257}},"sourceAsOf":null,"checkedAt":"2026-10-02","commercialUseAllowed":null,"catalogueCard":"https://wellficent.com/api/v1/wells/catalogues/uk-nsta-offshore"},{"catalogue":"uk-nsta-onshore","records":263,"sourceWellFamilies":148,"unclassifiedPurpose":0,"fields":{"operator":{"present":15,"missing":248,"missingFraction":0.9429657794676806},"sourceStatus":{"present":263,"missing":0,"missingFraction":0},"spudDate":{"present":263,"missing":0,"missingFraction":0},"measuredDepthM":{"present":225,"missing":38,"missingFraction":0.1444866920152091}},"sourceAsOf":null,"checkedAt":"2026-10-02","commercialUseAllowed":false,"catalogueCard":"https://wellficent.com/api/v1/wells/catalogues/uk-nsta-onshore"}],"rowQuality":{"ruleVersion":"wellficent-row-quality-v1","checks":["completion-before-spud","measured-depth-reference-unreported"],"scope":"Per-row source consistency checks retain original facts. Empty flags are not a guarantee of correctness."},"semantics":["Nulls are not imputed.","Additional family rows include sidetracks and boreholes, not established physical duplicates.","Completeness does not prove source accuracy, predictive performance or current operations."],"sortContract":{"default":"name","tieBreaker":"id ascending","nulls":"last for nullable sort fields","textCollation":"SQLite NOCASE (ASCII case folding)","available":["name","spud","spud-oldest","depth","operator","status","source-id"]}}