Chemical stimulation of geothermal injection wells
Various types of chemical stimulation methods have been considered. High pH fluids seem to be a logical choice for some wellbore and/or reservoir stimulations. However, forming of secondary deposits and creating of new reservoir damages due to chemical reactions between the rock material and these stimulation fluids make it advisable not to consider any of these high pH fluids in high temperature geothermal reservoirs. Fluids having a neutral pH can be successfully used in chemical stimulation methods only in a very few and rare instances. Low pH fluids, i.e. acids, have by far the best chance to be used for these chemical stimulation jobs. The major part of this report is concerned with acidizing techniques for geothermal injection wells. The acidizing techniques to be used for an experimental and the routine stimulation of injection wells are described. Some recent field experiences and the results of some laboratory work are described.
- Research Organization:
- Vetter Research, Costa Mesa, CA (USA)
- DOE Contract Number:
- AC03-78ET27146
- OSTI ID:
- 7141429
- Report Number(s):
- DOE/ET/27146-T12; ON: DE82021794
- Country of Publication:
- United States
- Language:
- English
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