Markus Häring - Academia.edu (original) (raw)

Papers by Markus Häring

Research paper thumbnail of Evaluation of flow paths during stimulation in an EGS reservoir using microseismic information

Research paper thumbnail of Introduction of in-situ stress information from borehole logging to source characterization of microseismic events

The 13th SEGJ International Symposium, Tokyo, Japan, 12-14 November 2018

Research paper thumbnail of Physics-based seismic evaluation method: Evaluating possible seismic moment based on microseismic information due to fluid stimulation

Research paper thumbnail of Multi-source multi-receiver microseismic reflection imaging: case study Basel

SEG Technical Program Expanded Abstracts 2012

Research paper thumbnail of Pore pressure migration during hydraulic stimulation due to permeability enhancement by low-pressure subcritical fracture slip

Geophysical Research Letters

Research paper thumbnail of Rupture directivity of fluid-induced microseismic events: Observations from an enhanced geothermal system

Journal of Geophysical Research: Solid Earth

Research paper thumbnail of Microseismic imaging of a geothermal reservoir stimulation

Research paper thumbnail of Microseismic reflection imaging and its application to the Basel geothermal reservoir

GEOPHYSICS, 2015

We have developed a new approach for reflection seismic imaging using microseismic waveform data.... more We have developed a new approach for reflection seismic imaging using microseismic waveform data. We took the specific character of microseismic downhole data into account and were able to image regions in the direct vicinity or inside of a seismically active zone. We used a directional migration method that reduced imaging artifacts caused by the low aperture of the data, but required estimation of the wavefield polarization. We also used hodogram analysis to identify parts of data that provided reliable polarization estimates. Only these parts were then used for imaging, whereas the rest of the data are excluded. The approach was successfully applied to microseismic waveforms recorded during and after the stimulation of the enhanced geothermal system in Basel, Switzerland. This data set included more than 2000 events recorded at five sparsely distributed borehole sensors. The reflection images revealed a distinct network of reflectors in the vicinity of the open hole section withi...

Research paper thumbnail of Characteristics of the large events from the seismically activated fractures at Basel geothermal reservoir

Proceedings of the 10th SEGJ International Symposium, 2011

Research paper thumbnail of Study on trigger mechanism of large induced seismicity at a hydraulic stimulation in Basel, Switzerland

Proceedings of the 11th SEGJ International Symposium, Yokohama, Japan, 18-21 November 2013, 2013

Research paper thumbnail of Identification of microseismic multiplets in the frequency domain and interpretation of reservoir structure at Basel, Switzerland

SEG Technical Program Expanded Abstracts 2008, 2008

Research paper thumbnail of Reservoir structure delineation by microseismic multiplet analysis at Basel, Switzerland, 2006

SEG Technical Program Expanded Abstracts 2007, 2007

Research paper thumbnail of Part 1: Geological and hydraulic evaluation of the geothermal reservoir Basel 1

Research paper thumbnail of Characteristics of Microseismic Events with Large Magnitude Collected at Cooper Basin, Australia and Basel, Switzerland

Research paper thumbnail of Reflection Imaging of Egs Reservoirs Using Microseismicity as a Source

Research paper thumbnail of Deep-Heat-Mining-Projekt Basel – Erste Erkenntnisse bei der Entwicklung eines Enhanced Geothermal System (EGS)

Research paper thumbnail of Rupture Propagation Imaging at Microseismic Scale

London 2013, 75th eage conference en exhibition incorporating SPE Europec, 2013

ABSTRACT We further develop the Back Projection technique for tracing the rupture propagation of ... more ABSTRACT We further develop the Back Projection technique for tracing the rupture propagation of microseismic events. We lay out the basic idea of Back Projection imaging and show the results for three synthetic datasets obtained using finite-difference modeling. The synthetic rupture models in use where generated according to microseismic events that occurred at the Basel EGS. They help us to understand the influences of the station geometry and the station weighting process which need to be applied in Back Projection imaging. The focus of the work lies in the analysis of real events and the extraction of their respective properties. We show the corresponding results for the four largest real events of local magnitudes M=3.1-3.4 from the Basel EGS site and discuss the validity and interpretation of the outcome. We find that the obtained rupture dimensions are consistent with the independent magnitude derived estimates. The rupture directions which are obtained fit reasonably well to the shape of the microseismic cloud and to one of the respective fault planes obtained from source mechanism analysis. This supports the validity of our approach. In addition we are hereby capable of solving the fault plane ambiguity.

Research paper thumbnail of Investigation on the characteristics of seismic events observed during stimulation of geothermal reservoirs at Basel, Switzerland

Hydraulic stimulation is commonly used to develop engineered geothermal systems (EGS) and enhance... more Hydraulic stimulation is commonly used to develop engineered geothermal systems (EGS) and enhancement of oil recovery (EOR). Occurrence of seismic events with larger magnitude has been highlighted as one of the practical and critical problems. Some seismic events with moment magnitude (Mw) larger than 2.0 occurred during and after hydraulic stimulation in Basel, Switzerland, in 2006, and these large events led to the geothermal project discontinued. We defined the large event as seismic events with Mw>2.0, and have investigated fundamental characteristics of them as summarized in Table 1. It has been revealed that the characteristics of the large events are dependent on hypocentral location and origin time. We also found most of the large events occurred from 2 types of fracture planes: 6 of 9large events had FPSs with N-S azimuth. Other 3 large events including the largest events had FPSs ESE-WNW azimuth, which can be interpreted as "most slip-able" under stress state ...

Research paper thumbnail of Fault plane solutions of earthquakes from deep geothermal reservoirs

We have collected seismic data from EGS and hydrothermal geothermal reservoirs at Basel, Switzerl... more We have collected seismic data from EGS and hydrothermal geothermal reservoirs at Basel, Switzerland, Cooper Basin, Australia, and Yanaizu-Nishiyama, Japan. The depth of the reservoir is from 2km to 5km and type of possible slip from the stress state is different for each field. Felt earthquakes have been observed at all the fields with/without clear correlation to human operation to the reservoir. We have estimated fault pale solutions (FPS) of the events using polarization of the first break of P-wave and seismic structure of the hypocenters of the seismic multiplets, and investigated relationship to the other source parameters including magnitude, source radii, and stress drop. The followings have been found throughout this study. (a) Most of the FPSs showed consistency to the Coulomb's criterion for shear slip, suggesting that earthquakes occurred from "highly slip-able" fractures. (b) The data from Cooper Basin showed that most of the felt earthquakes have origin ...

Research paper thumbnail of Structural geology of Central Switzerland - results of seismic campaign in 2011 in cantons Nid- and Obwalden

GVM [Gas Verbund Mittelland AG) commissioned in 2011 the acquisition of 113 km of 20 refle ction ... more GVM [Gas Verbund Mittelland AG) commissioned in 2011 the acquisition of 113 km of 20 refle ction seismic as a first step of an integrated exploration campaign for geothermal and hydrocarbon resources in the cantons Nid- and Obwalden [Switzerland). One of the aims of the seismic campaign was to define the structure of the Helvetic nappes and its base, the internal build -up of the underlying Tertiary sediments and the autochthonous Mesozoie cover. The new da ta allow defining the internal tecton ics of the Drusberg nappe and its base. The deformation style of the Drusberg nappe is characterized by imbrication and ramp anticlines . The base of the Helvet ic nappe forms a relatively flat, wide and gently structured synform south of a Une Schwendi - Alpnach - Stans. The base of the Helvetic nappes reaches a max. depth of approximately 1.8-2.0 km below the Sarner Aa valley. It is not possible to distinguish between south dipping Molasse and supposed North Helvetic Flysch . The autochthon...

Research paper thumbnail of Evaluation of flow paths during stimulation in an EGS reservoir using microseismic information

Research paper thumbnail of Introduction of in-situ stress information from borehole logging to source characterization of microseismic events

The 13th SEGJ International Symposium, Tokyo, Japan, 12-14 November 2018

Research paper thumbnail of Physics-based seismic evaluation method: Evaluating possible seismic moment based on microseismic information due to fluid stimulation

Research paper thumbnail of Multi-source multi-receiver microseismic reflection imaging: case study Basel

SEG Technical Program Expanded Abstracts 2012

Research paper thumbnail of Pore pressure migration during hydraulic stimulation due to permeability enhancement by low-pressure subcritical fracture slip

Geophysical Research Letters

Research paper thumbnail of Rupture directivity of fluid-induced microseismic events: Observations from an enhanced geothermal system

Journal of Geophysical Research: Solid Earth

Research paper thumbnail of Microseismic imaging of a geothermal reservoir stimulation

Research paper thumbnail of Microseismic reflection imaging and its application to the Basel geothermal reservoir

GEOPHYSICS, 2015

We have developed a new approach for reflection seismic imaging using microseismic waveform data.... more We have developed a new approach for reflection seismic imaging using microseismic waveform data. We took the specific character of microseismic downhole data into account and were able to image regions in the direct vicinity or inside of a seismically active zone. We used a directional migration method that reduced imaging artifacts caused by the low aperture of the data, but required estimation of the wavefield polarization. We also used hodogram analysis to identify parts of data that provided reliable polarization estimates. Only these parts were then used for imaging, whereas the rest of the data are excluded. The approach was successfully applied to microseismic waveforms recorded during and after the stimulation of the enhanced geothermal system in Basel, Switzerland. This data set included more than 2000 events recorded at five sparsely distributed borehole sensors. The reflection images revealed a distinct network of reflectors in the vicinity of the open hole section withi...

Research paper thumbnail of Characteristics of the large events from the seismically activated fractures at Basel geothermal reservoir

Proceedings of the 10th SEGJ International Symposium, 2011

Research paper thumbnail of Study on trigger mechanism of large induced seismicity at a hydraulic stimulation in Basel, Switzerland

Proceedings of the 11th SEGJ International Symposium, Yokohama, Japan, 18-21 November 2013, 2013

Research paper thumbnail of Identification of microseismic multiplets in the frequency domain and interpretation of reservoir structure at Basel, Switzerland

SEG Technical Program Expanded Abstracts 2008, 2008

Research paper thumbnail of Reservoir structure delineation by microseismic multiplet analysis at Basel, Switzerland, 2006

SEG Technical Program Expanded Abstracts 2007, 2007

Research paper thumbnail of Part 1: Geological and hydraulic evaluation of the geothermal reservoir Basel 1

Research paper thumbnail of Characteristics of Microseismic Events with Large Magnitude Collected at Cooper Basin, Australia and Basel, Switzerland

Research paper thumbnail of Reflection Imaging of Egs Reservoirs Using Microseismicity as a Source

Research paper thumbnail of Deep-Heat-Mining-Projekt Basel – Erste Erkenntnisse bei der Entwicklung eines Enhanced Geothermal System (EGS)

Research paper thumbnail of Rupture Propagation Imaging at Microseismic Scale

London 2013, 75th eage conference en exhibition incorporating SPE Europec, 2013

ABSTRACT We further develop the Back Projection technique for tracing the rupture propagation of ... more ABSTRACT We further develop the Back Projection technique for tracing the rupture propagation of microseismic events. We lay out the basic idea of Back Projection imaging and show the results for three synthetic datasets obtained using finite-difference modeling. The synthetic rupture models in use where generated according to microseismic events that occurred at the Basel EGS. They help us to understand the influences of the station geometry and the station weighting process which need to be applied in Back Projection imaging. The focus of the work lies in the analysis of real events and the extraction of their respective properties. We show the corresponding results for the four largest real events of local magnitudes M=3.1-3.4 from the Basel EGS site and discuss the validity and interpretation of the outcome. We find that the obtained rupture dimensions are consistent with the independent magnitude derived estimates. The rupture directions which are obtained fit reasonably well to the shape of the microseismic cloud and to one of the respective fault planes obtained from source mechanism analysis. This supports the validity of our approach. In addition we are hereby capable of solving the fault plane ambiguity.

Research paper thumbnail of Investigation on the characteristics of seismic events observed during stimulation of geothermal reservoirs at Basel, Switzerland

Hydraulic stimulation is commonly used to develop engineered geothermal systems (EGS) and enhance... more Hydraulic stimulation is commonly used to develop engineered geothermal systems (EGS) and enhancement of oil recovery (EOR). Occurrence of seismic events with larger magnitude has been highlighted as one of the practical and critical problems. Some seismic events with moment magnitude (Mw) larger than 2.0 occurred during and after hydraulic stimulation in Basel, Switzerland, in 2006, and these large events led to the geothermal project discontinued. We defined the large event as seismic events with Mw>2.0, and have investigated fundamental characteristics of them as summarized in Table 1. It has been revealed that the characteristics of the large events are dependent on hypocentral location and origin time. We also found most of the large events occurred from 2 types of fracture planes: 6 of 9large events had FPSs with N-S azimuth. Other 3 large events including the largest events had FPSs ESE-WNW azimuth, which can be interpreted as "most slip-able" under stress state ...

Research paper thumbnail of Fault plane solutions of earthquakes from deep geothermal reservoirs

We have collected seismic data from EGS and hydrothermal geothermal reservoirs at Basel, Switzerl... more We have collected seismic data from EGS and hydrothermal geothermal reservoirs at Basel, Switzerland, Cooper Basin, Australia, and Yanaizu-Nishiyama, Japan. The depth of the reservoir is from 2km to 5km and type of possible slip from the stress state is different for each field. Felt earthquakes have been observed at all the fields with/without clear correlation to human operation to the reservoir. We have estimated fault pale solutions (FPS) of the events using polarization of the first break of P-wave and seismic structure of the hypocenters of the seismic multiplets, and investigated relationship to the other source parameters including magnitude, source radii, and stress drop. The followings have been found throughout this study. (a) Most of the FPSs showed consistency to the Coulomb's criterion for shear slip, suggesting that earthquakes occurred from "highly slip-able" fractures. (b) The data from Cooper Basin showed that most of the felt earthquakes have origin ...

Research paper thumbnail of Structural geology of Central Switzerland - results of seismic campaign in 2011 in cantons Nid- and Obwalden

GVM [Gas Verbund Mittelland AG) commissioned in 2011 the acquisition of 113 km of 20 refle ction ... more GVM [Gas Verbund Mittelland AG) commissioned in 2011 the acquisition of 113 km of 20 refle ction seismic as a first step of an integrated exploration campaign for geothermal and hydrocarbon resources in the cantons Nid- and Obwalden [Switzerland). One of the aims of the seismic campaign was to define the structure of the Helvetic nappes and its base, the internal build -up of the underlying Tertiary sediments and the autochthonous Mesozoie cover. The new da ta allow defining the internal tecton ics of the Drusberg nappe and its base. The deformation style of the Drusberg nappe is characterized by imbrication and ramp anticlines . The base of the Helvet ic nappe forms a relatively flat, wide and gently structured synform south of a Une Schwendi - Alpnach - Stans. The base of the Helvetic nappes reaches a max. depth of approximately 1.8-2.0 km below the Sarner Aa valley. It is not possible to distinguish between south dipping Molasse and supposed North Helvetic Flysch . The autochthon...