Investigations of Potential Induced Seismicity Related to Geologic Carbon Dioxide Sequestration in California
This project addresses public concern about the unknown but potential risk of induced seismicity.
In Phase I, LBNL assembled publically available data and carried out some preliminary analyses to form the basis for Phase II activities. These analyses included oil field production and injection data, existing reservoir pools where injection has elevated pressure levels, and correlation of injection in southern California with seismicity. Based on the recommendations of the Project Advisory Committee, Phase II includes three studies at King Island that build on previous work: experiments on the seal properties of the cap rock, a coupled flow/geomechanics model of pressure, and a simulation-based seismic risk analysis.
1. Identified and assessed sources of data and background information on seismic events associated with oil and gas injection and production, especially in areas where fault activity may result in leakage, to improve our understanding of existing pressures and seismic responses to increased or decreased pore pressures.
2. Collected and assessed sources of core samples of relevant caprock to measure their fracture-related flow properties such as porosity, permeability, relative permeability, and capillary pressure to understand how these formations in California will respond to increased pressures from sequestration activities.
3. Evaluated information from well borings and other measurements that are available to better define the state of stress at specific sites.
There is a need for research to improve our understanding of the potential and severity of induced seismicity from geologic carbon sequestration.