GENERAL INFORMATION

Title: Geothermal Project on TU Delft Campus - DAPGEO-02 Sonic and NMR logs 
DOI: 10.4121/e74d650d-31e5-441f-bde5-aaa4338e9d10

Date of data collection: 2022-07-31  
Location of data collection: Delft, The Netherlands 

Start of embargo: 2022-07-31
End of embargo: 2024-07-31

CONTACT

Send your questions about this dataset to:

	Auke Barnhoorn (auke.barnhoorn@tudelft.nl)
	Associate Professor in Applied Geophysics and Petrophysics
	TU Delft, Faculty of Civil Engineering and Geosciences 
	Department of Geoscience and Engineering
 
DESCRIPTION

This data publication contains the following unique geophysical logs, collected from the multi-purpose research borehole DAPGEO-02, between 228 m and 428 m depth:

- Nuclear Magnetic Resonance (NMR)
- Full Waveform Sonic (FWS)
- P- and S-wave velocity from PS suspension logging


DAPGEO-02 borehole is part of the seismic monitoring network of the geothermal research project on TU Delft Campus (tudelft.nl\geothermalwell). Well logs in this dataset are complementary to the Initial Borehole Dataset https://doi.org/10.4121/21528819], and will become public two years after the end of the data collection date, alongside the corresponding scientific publication. Full description of the logs and their processing is in the Drilling Report https://doi.org/10.4233/uuid:fde70c00-cf65-4174-9cd3-89585a5e61bd. 

Borehole Name: DAPGEO-02
Drilling phase: 3 and 4
From Depth (m): 230.35
To Depth (m): 428
Ground Level: -2.73
Drilling bit diameter (mm): 244
Logging company: Deltares
File Format: LAS versions 3.0 and 2.0

CONTENTS
Full Wavefor Sonic (FWS) 				= DAPGEO-02_500m_PHASE3_FWS.las
Nuclear Magnetic Resonance (NMR) 			= DAPGEO-02_500m_PHASE3_NMR_SGR_c.las
P- and S-wave velocity from PS suspension logging 	= DAPGEO-02_500m_PHASE3_VPVS_processed.las
S-wave velocity from PS suspension logging 		= DAPGEO-02_500m_PHASE4_VS_processed.las

Files were delivered by Deltares and have not been modified. Details about the tools, logging speed and tool deployment are decribed on the Drilling report (https://doi.org/10.4233/uuid:fde70c00-cf65-4174-9cd3-89585a5e61bd).

SOFTWARE

Deltares was commissioned to acquired and processes this data and used the commercial software WellCAD to process and plot these data, as shown in the final Drilling Report https://doi.org/10.4233/uuid:fde70c00-cf65-4174-9cd3-89585a5e61bd. However, it might be possible to read this data with modern Python packages. 

FUNDING

The research leading to these results has received funding from Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) via the EPOS-NL project. 


