Publications and responsibilities
The effect of brine supply on CO2 injectivity impairment due to salt precipitation
Salt clogging has been recognized as an important factor for injectivity impairment in the CO2 injection wells. While only a small amount of field experience with salt clogging has been reported to date, a large number of experimental and numerical studies have been published on the topics of inject...
Porosity, permeability and compaction trends for Scandinavian regoliths
Cement placement in damaged shale rocks: effects of shale properties
The importance of shale caprock damage for well integrity
Well integrity is crucially dependent on the bonding quality between cement and rock. Several studies have been made of this in the past, but none have taken into account that the drilled rock can be fractured and damaged during drilling. Especially a caprock fractured in the near-well zone can jeop...
Salt clogging during supercritical CO2 injection
Cement/Rock Interface Carbonation during Supercritical CO2 Injection
Avoiding Damage of CO2 Injection Wells Caused by Temperature Variations
Well integrity is a prerequisite for safe geological storage of CO2. Both active and abandoned wells are man-made channels between the storage reservoir and the atmosphere that can become leakage paths over time. The CO2 injection wells are of special concern, as they are exposed to low temperatures...
Assessment of Thermal Stress on Well Integrity as a Function of Size and Material Properties
Wellbore integrity is critical to long term carbon storage. During CO2 injection, changes in temperature may result in large stress variations that can damage the well, threatening its integrity. The different materials comprising the wellbore and near-wellbore environment (namely the casing, cement...
Porosity Changes in Mud-affected Rock and Cement upon Reaction with CO2
Leakage from CO2 storage reservoirs is a threat towards safe and cost-efficient Carbon Capture and Storage (CCS), and active and abandoned wells have been identified as the most probable leakage paths. This underlines the importance of ensuring well integrity throughout the entire life-cycle of a we...