Monitoring of fluid injection and soil consolidation using surface tilt measurements
- Lawrence Berkeley National Lab., CA (United States)
Temporal variations of surface tilt may be used for the noninvasive monitoring of subsurface volume change. Such volume changes may accompany settlement near structures, the response due to fluid injection or withdrawal, and excavation-related activity. The authors outline a methodology for using tilt data to estimate volume changes within poroelastic media. The expressions relating subsurface volume change and surface tilt are simple and compact, offering the possibility of real-time monitoring. The inversion of actual tilt data from a site near Raymond, California, generates images of fluid withdrawal from a complex fracture zone about 30 m below the surface. Volume changes are confined to an elongated north-south zone in agreement with independent well test data. The authors have also applied the methodology for the inversion of surface tilt to data from a grout injection experiment in Los Banos. The technique enables one to monitor grout migration through a porous gravel.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 600032
- Journal Information:
- Journal of Geotechnical and Geoenvironmental Engineering, Vol. 124, Issue 1; Other Information: PBD: Jan 1998
- Country of Publication:
- United States
- Language:
- English
Similar Records
Using surface deformation to image reservoir dynamics
Pressure Transient Analyses and Poroelastic Modeling of Hydraulic Fracture Dilation for Multiple Injections at the Devine Fracture Pilot Site