- Update of fracture pressure estimates for saline aquifer storage units by application of a regional function to describe the relationship of fracture pressure with depth.
- The regional function is derived from best-fit curves on plots of measured well pressure data (leak off tests) and incorporating pressure of the overlying water column.
Two regional depth and pressure functions are determined for:
- Central and Northern North Sea
- Southern North Sea (also applied to the East Irish Sea and English Channel)
- The methodology, and evaluation by statistical analysis and pragmatic appraisal is described in CO2Stored project document 'Overview of fracture pressure calculation methodology work for CO2 stored.docx'
S Holloway M Bentham, M Lark and J Williams, BGS
- Integration of the fracture pressure calculation algorithm into CO2Stored to ensure the integrity of the database
- Consistency of a fundamental calculated parameter, on which others are based, for the storage units
- Improved fracture pressure estimates for saline aquifer storage units
- Estimated fracture pressure values for saline aquifer units that are consistent with values for hydrocarbon field storage units
- Increased confidence in the maximum, minimum and most likely fracture pressure values and storage capacity for each saline aquifer storage unit
18 May 2015