Characterization of hydraulic properties of rocks using probability of fluid-induced microearthquakes

Autor:	Elmar Rothert, Serge A. Shapiro, Susanne Rentsch
Rok vydání:	2005
Předmět:	Pore water pressure Geophysics Geochemistry and Petrology Passive seismic Borehole Characterisation of pore space in soil Induced seismicity Petrology Geothermal gradient Perturbation (geology) Seismology Geology
Zdroj:	GEOPHYSICS. 70:F27-F33
ISSN:	1942-2156 0016-8033
DOI:	10.1190/1.1897030
Popis:	The use of borehole fluid injections is typical for exploration and development of hydrocarbon or geothermal reservoirs. Such injections often induce small-magnitude earthquakes. The nature of processes leading to triggering of such microseismicity is still not completely understood. Here, we consider induced microseismicity, using as examples two case studies of geothermal reservoirs in crystalline rocks and one case study of a tight-gas sandstone reservoir. In all three cases, we found that the probability of induced earthquakes occurring is very well described by the relaxation law of pressure perturbation in fluids filling the pore space in rocks. This strongly supports the hypothesis of seismicity triggered by pore pressure. Moreover, this opens additional possibilities of using passive seismic monitoring to characterize hydraulic properties of rocks on the reservoir scale with high precision.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::893921bc0a4fcecd6c290e2576f2a017 https://doi.org/10.1190/1.1897030 Zobrazit plný text záznamu