GEO ExPro

Suriname: Offshore Cretaceous Trend Falters

Tullow’s Block 47 GVN-1 has reached TD at 5,060m, encountering good quality reservoir but only minor oil shows.
This article appeared in Vol. 18, No. 2 - 2021

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Suriname: Offshore Cretaceous Trend Falters

Map showing location of the GVN-1 well in Tullow's Block 47, offshore Suriname. Tullow’s Block 47 GVN-1 has reached TD at 5,060m, encountering good quality reservoir but only minor oil shows. Drilling, delayed from 2020 due to Covid restrictions, was completed using the Stena Forth drillship in 1,856m of water. Best estimate prospective resources for the well had been posted at 235 MMboe, with a 34% geological chance of success. The well tested the Goliathberg and Voltzberg North targets in the Cretaceous turbidite play. Tullow hoped to extend the Guyana–Suriname fairway to the northeast in a bend bordering a Cretaceous kitchen to the west and the Demerara High to the east. This has proven prolific so far, with the Canje source kitchen charging oil gas and condensate fields from Liza to Keskesi East. Tullow have a huge acreage position to follow up in this area with two other adjacent blocks in the Demerara Basin (Blocks 54 and 62) and could yet join the likes of Apache as a large independent with a major discovery after a string of non-commercial wells in Suriname. Ratio and Pluspetrol are partners on Block 47.

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