Disappointing results for Chrysaor in North Sea well

Oil and gas company Chrysaor has concluded the drilling of the Jerv exploration well, located in the North Sea off Norway, but failed to find commercial hydrocarbons.

COSLInnovator rig drilled the Jerv well for Chrysaor
COSLInnovator rig drilled the Jerv well for Chrysaor; Photo source: COSL Europe

The 15/12-25 well is located PL973 where Chrysaor Norge is the operator with a 50 per cent working interest and other licensees are OKEA with a 30 per cent and Petoro with a 20 per cent interest.

The Jerv well was spud on 18 February 2021, using the COSLInnovator semi-submersible rig.

OKEA said last week that hydrocarbons had been observed from logs and cuttings on entering the reservoir in the Jerv exploration well but the final results were still not in.

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In an update on Tuesday, OKEA said that the well targeted petroleum in reservoirs of Paleocene age (Ty Formation). The well was drilled to a total depth of 2,795 m below mean sea level and terminated in limestone, also assumed to be of Paleocene age. The water depth is 86 m.

The well encountered a 40 m gas condensate column in a reservoir of good to very good quality. No gas-water contact was observed.

The well was not formation tested but coring, sampling and data acquisition were performed, including pressure data. The reservoir pressure is highly depleted and the remaining resources are interpreted to be insufficient for development.

The well is now being plugged for abandonment and no further data will be acquired.

This is the first exploration well drilled in PL973, which was awarded in 2019 through the APA2018 licensing round.

The well 15/12-25 was drilled by the COSLInnovator rig, which will now drill well 15/12-26 on the Ilder prospect, located in the same licence.