Drilling Fluid/Formation Interaction at Simulated in Situ Geothermal Conditions
- Key words
- Drilling; USA; California; East Mesa; Mud; Drilling Medium; Additives
- Location
- East Mesa, California; Imperial Valley
- Conference
- Geothermal Resources Council Transactions
- Year
- 1980
- Session
- Drilling; Drilling fluids; Formation damage; Permeability
- Language
- English
Abstract
Interaction of drilling fluids with a geothermal reservoir formation can result in significant permeability impairment and therefore reduced well productivity. This interaction is studies under simulated in situ geothermal conditions overburden stress, pore fluid pressure, temperature and pore fluid chemistry. Permeability impairment of an East Mesa KGRA reservoir material is evaluated as a function of stagnation time, drilling fluid and temperature. Results indicated at all of these parameters contribute significantly to the magnitude and the reversibility of the impairment.
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