|Title||An assessment of carbon sequestration potential in the UK? Southern North Sea case study|
|Publication Type||Tyndall Working Paper|
|Series||Tyndall Centre Working Papers|
|Tyndall Consortium Institution|| |
|Secondary Title||Tyndall Centre Working Paper 85|
|Year of Publication||2006|
This report discusses the potential for storing CO2 in the Bunter Sandstone Formation (saline aquifer) and gas fields in the Southern North Sea Basin of the UK. The estimated storage potential in the closed structures of the Bunter Sandstone Formation and gas fields 2811 million tonnes and 14305 million tonnes of CO2 respectively. Many of the Southern North Sea gas fields are produced by depletion drive with very little aquifer support during production. This makes them particularly favourable for CO2 storage, as the reservoir pressure after production is low making CO2 injection less costly. The gas fields also have proven gas seals over geological timescales. Most of the closed structures in the Bunter Sandstone Formation have not stored gas and the injectivity of the Bunter Sandstone Formation is largely unknown, as a result storage in this aquifer carries more uncertainties than in the gas fields. It is important that before CO2 injection takes place at any geological storage site, a full site investigation, characterisation and testing should be carried out. The storage sites identified in this study were used to produce Tyndall Centre scenarios, outlined in this report (section 2). The purpose of the scenarios is to present stakeholders with a range of options for reducing CO2 emissions using geological storage of CO2. This scenario work was presented to identified stakeholders as part of the Tyndall Centre Project ‘An Integrated Assessment of Geological CO2 Sequestration in the UK’.