DAS observation of guided waves in a shale reservoir generated by perforation shots
- Ariel Lellouch (Stanford University) | Biondo Biondi (Stanford University) | Steve Horne (Chevron Energy Technology Company) | Mark A. Meadows (Chevron Energy Technology Company) | Tamas Nemeth (Chevron Energy Technology Company)
- Document ID
- Society of Exploration Geophysicists
- SEG International Exposition and Annual Meeting, 15-20 September, San Antonio, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2019. Society of Exploration Geophysicists
- DAS (distributed acoustic sensors), Unconventional, Dispersion, Downhole receivers, Shale
- 4 in the last 30 days
- 4 since 2007
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We show distributed acoustic sensing records of guided waves excited by perforation shorts in a low-velocity shale layer. Thanks to the high spatial and temporal resolution of distributed acoustic sensing acquisition, high frequencies of up to 700 Hz can be observed. We analyze and validate the existence of such waves with synthetic modeling and by comparing their presence in horizonal and vertical parts of the well. These guided waves are trapped within the low velocity organic shale reservoir. Using a simple synthetic experiment, we show that these waves are sensitive to small velocity changes induced by stimulation. Since distributed acoustic sensing allows high spatial and temporal sampling, these guided waves can be measured with high resolution, allowing them to be used for imaging and analysis.
Presentation Date: Monday, September 16, 2019
Session Start Time: 1:50 PM
Presentation Time: 3:05 PM
Presentation Type: Oral
|File Size||1 MB||Number of Pages||5|
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