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The Pentland Formation at Culzean: A Heterogeneous Fluvial Reservoir with Proven Production Performance
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, First EAGE Workshop on the Triassic and Jurassic Plays in Northwest Europe, Feb 2025, Volume 2025, p.1 - 5
Abstract
Summary
The Jurassic Pentland Formation in the Central North Sea is is regionally placed in a humid upper delta to alluvial plain setting and is known for its heterolithic facies. There have been a limited number of economically successful hydrocarbon field developments and there have been some sizeable discoveries, e.g. the Kessog field, that have not been developed. At the HPHT Culzean field the Pentland Formation has relatively favourable petrophysical properties compared to nearby fields. It been on production for 4 years with and delivered gas at high initial production rates and demonstrated economically significant connected volumes. Further development of the Pentland has been derisked through pulsed neutron log acquisition and executed adding perforation to existing Triassic production wells. Again excellent production rates and connected volumes have been proven following perforation. The production performance of the Pentland Formation at Culzean is a case study demonstrating the economic viability of the middle Jurassic play in the Central North Sea. Follow up potential to further increase recovery from the Pentland Formation exists at Culzean as well as there being exploration targets in the middle Jurassic in the acreage surrounding Culzean
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