Albrecht, M & Mansurov, V 2008, 'Seismic Monitoring From Within the Stimulation Borehole of an Oil or Gas Reservoir', in Y Potvin, J Carter, A Dyskin & R Jeffrey (eds), SHIRMS 2008: Proceedings of the First Southern Hemisphere International Rock Mechanics Symposium, Australian Centre for Geomechanics, Perth, pp. 323-332, https://doi.org/10.36487/ACG_repo/808_04 (https://papers.acg.uwa.edu.au/p/808_04_Albrecht/) Abstract: Seismic monitoring of reservoir stimulation through hydraulic fracturing has been used in the oil and gas industry as well as in stimulation of geothermal hot dry rock reservoirs for quite some time. Traditionally, this monitoring is performed from within special seismic monitoring boreholes that, due to practical and inversion restrictions, are not located in the immediate vicinity of the stimulated borehole. Monitoring boreholes are excluded from off shore drilling locations due to financial reasons. Financial reasons also restrict their use for many commercial reservoir stimulation operations. Monitoring boreholes are located in the far field of the stimulation well. As a result, high frequency information, as well as small near well events is not registered. Thus, very valuable high resolution information and in situ rock mechanical information is lost when using traditional monitoring boreholes. The advantages of focusing on data acquisition for seismic monitoring located in the stimulation borehole are large; high resolution information and classic seismological information can be obtained, and where applicable drilling costs for monitoring wells can be reduced.