Combined use of Optical-fiber DAS and a Permanent Seismic Source for Vertical Seismic Profiling Demonstrated at the Aquistore CO2 Storage Site

2018 ◽  
Author(s):  
Masashi Nakatsukasa ◽  
Hideaki Ban ◽  
Ayato Kato ◽  
Naoyuki Shimoda ◽  
Donald White ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Co2 Storage ◽  
Seismic Source ◽  
Storage Site ◽  
Seismic Profiling ◽  
Vertical Seismic Profiling ◽  
Combined Use

scholarly journals Underground Vertical Seismic Profiling with Conventional and Fiber-Optic Systems for Exploration in the Kylylahti Polymetallic Mine, Eastern Finland

Minerals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 538 ◽  
Author(s):  
Marko Riedel ◽  
Calin Cosma ◽  
Nicoleta Enescu ◽  
Emilia Koivisto ◽  
Kari Komminaho ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Fiber Optic ◽  
Seismic Source ◽  
Massive Sulfide ◽  
Joint Analysis ◽  
Sulfide Deposit ◽  
Minor Role ◽  
Seismic Profiling ◽  
Vertical Seismic Profiling ◽  
Eastern Finland

Seismic reflection methods have been used for the exploration of mineral resources for several decades. However, despite their unmatched spatial resolution and depth penetration, they only have played a minor role in mineral discoveries so far. Instead, mining and exploration companies have traditionally focused more on the use of potential field, electric and electromagnetic methods. In this context, we present a case study of an underground Vertical Seismic Profiling (VSP) experiment, which was designed to image a (semi-)massive sulfide deposit located in the Kylylahti polymetallic mine in eastern Finland. For the measurement, we used a conventional VSP with three-component geophones and a novel fiber-optic Distributed Acoustic Sensing (DAS) system. Both systems were deployed in boreholes located nearby the target sulfide deposit, and used in combination with an active seismic source that was fired from within the underground tunnels. With this setup, we successfully recorded seismic reflections from the deposit and its nearby geological contrasts. The recording systems provided data with a good signal-to-noise ratio and high spatial resolution. In addition to the measurements, we generated a realistic synthetic dataset based on a detailed geological model derived from extensive drilling data and petrophysical laboratory analysis. Specific processing and imaging of the acquired and synthetic datasets yielded high-resolution reflectivity images. Joint analysis of these images and cross-validation with lithological logging data from 135 nearby boreholes led to successful interpretation of key geological contacts including the target sulfide mineralization. In conclusion, our experiment demonstrates the value of in-mine VSP measurements for detailed resource delineation in a complex geological setting. In particular, we emphasize the potential benefit of using fiber-optic DAS systems, which provide reflection data at sufficient quality with less logistical effort and a higher acquisition rate. This amounts to a lower total acquisition cost, which makes DAS a valuable tool for future mineral exploration activities.

Shallow characterization and monitoring of the Aquistore CO2 storage site from spatially windowed surface-wave analysis with a permanent seismic source

2017 ◽  
Author(s):  
Tatsunori Ikeda ◽  
Takeshi Tsuji ◽  
Masashi Nakatsukasa ◽  
Hideaki Ban ◽  
Ayato Kato ◽  
...  
Keyword(s):  
Surface Wave ◽  
Co2 Storage ◽  
Seismic Source ◽  
Storage Site ◽  
Wave Analysis

The Performance of an ACROSS Permanent Seismic Source for Time Lapse Seismic at the Aquistore CO2 Storage Site

2016 ◽  
Author(s):  
Masashi Nakatsukasa ◽  
Isao Kurosawa ◽  
Ayato Kato ◽  
Mamoru Takanashi ◽  
Don J White ◽  
...  
Keyword(s):  
Co2 Storage ◽  
Seismic Source ◽  
Time Lapse ◽  
Storage Site

scholarly journals Seismic-While-Drilling in Kuwait Results and Applications

GeoArabia ◽  
1996 ◽  
Vol 1 (4) ◽  
pp. 531-550
Author(s):  
Osman S. Khaled ◽  
Alaa M. Al-Ateeqi ◽  
Andrew R. James ◽  
Richard J. Meehan
Keyword(s):  
Real Time ◽  
Seismic Source ◽  
Extensive Study ◽  
Drilling Process ◽  
Seismic Profiling ◽  
Vertical Seismic Profiling ◽  
Look Ahead ◽  
Drilling Technique ◽  
Oil Company

ABSTRACT During early 1994, Kuwait Oil Company and Schlumberger completed an extensive study of the Seismic-While-Drilling technique in two development wells in the Raudhatain field of North Kuwait. Seismic-While-Drilling records the energy radiated from a working drillbit (utilized as a seismic source), with receivers placed at the surface. This technology provides well seismic information such as checkshot and look ahead Vertical Seismic Profiling services at the wellsite, in real-time. The technique does not interfere with the drilling process nor does it require deploying any downhole hardware. The result of the study is that the Seismic-While-Drilling technique can work successfully in the Raudhatain field.

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