Difference between revisions of "October 8"

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Revision as of 16:50, 26 March 2020

EGS Collab Daily Shift Report


Written by: Craig Ulrich (culrich@lbl.gov; 510-495-8891) 10/08/19

SURF Personnel: George Vandine

Location(s): 4100 Level Battery Alcove



1.     We (Craig Ulrich, LBNL; Joe Pope, Sandia; George Vandine, SURF; and Carlo Primo, Consultant) took the 7:00 am cage down to the 4100 Level to initiate logging in the vertical borehole with fluid temperature/conductivity (FTC).

2.     Jeff Burghardt briefly went to the 4850 in the morning, then caught up with the 4100 crew:

a.     Closed an isolation valve on a pressure transducer with a burst disk rated to 5,700 psi. There was a worry that this burst disk could rupture when the injection pressure was around 5,000 psi. There are several other burst disks in the system that are rated to 10,000 psi, and all equipment in the system is rated to at least this pressure. There are also other pressure transducers, so this lower-pressure transducer was unnecessary. Closed the valve to this transducer and it was recorded in the metadata.

b.     Checked the water level on the chiller and found it to be full.

c.     Greased front and back Triplex pump motor bearings.

d.     Checked Triplex pump oil – full.

e.     Funnel at the top of well E1-PST is clogged and overflowing.

10 8 1.jpg

f.      Very slow drip out of the top of the E1-P that is missing the funnel. It is dripping out of the top of a piece of tape on the conveyance.

10 8 2.jpg

3.     A toolbox talk was initiated and the day’s activities were discussed along with mitigations.

4.     A search for all gear resulted in all logging gear and packers and compass being located.

5.     Pressure data was downloaded by Jeff and after the pressure was released from the borehole with a strong smell of rotten eggs (H2S) emitting from the borehole with bubbles, like carbonation surfacing at the top of the wellbore.

6.     TV4100 was logged with FTC from top to bottom and compared to the previous FTC log from July 2019 just after drilling. A comparison log was built in WellCAD and distributed for evaluation and as a guide to water sampling.

7.     Water samples were then collected using a double valve bailer at 47m and 6.2m in the borehole. Carlo filtered and prepped the samples for delivery to Hari.

8.     TV4100 was then flushed with mine water and an estimated 3-5 well volumes were displaced leaving a large amount of water on the alcove floor.

9.     Efforts were made to remove the water but with limited supplies the effort was halted and a decision was made to cage up early to buy supplies at the hardware store to remove the water.

10. The team caught the 4:30pm cage up and exited the site for the day.


Lead Researcher: Craig Ulrich (culrich@lbl.gov; 510-495-8891)


Documents or Procedures: JHAs: EGS-002-Rev1


Inspections: general 4100 site layout, logging gear, and boreholes. Inspected the chiller, pressure panels, triplex pump, and all well heads on 4850.


Materials Receiving/Shipping: Nothing today.


Comments: Successful logging but not with removal of water.


Recommendations: N/A.


Irregularities: N/A


Acts of Safety: All members worked safely together today and lifted heavy boxes with two person teams. Verified the pressure rating of all burst disks on 4850.


Near Misses or Incidents: N/A.


EGS Collab Personnel Hours (Surface and Underground):




Surface Hours

Underground Hours

Time In

Time Out

Time In

Time Out


Craig Ulrich (LBNL)






George Vandine (SDSTA)






Joe Pope (Sandia)






Carlo Primo (Consultant)






Jeff Burghardt (PNNL)











10 8 3.jpg


Figure 1. Toolbox Form.

10 8 4.jpg


Figure 2. FTC Logging

10 8 5.jpg


Figure 3. Collecting water samples with dual valve bailer.

10 8 6.jpg


Figure 4. Flushing TV4100.

10 8 7.jpg


Figure 5. End of day after flushing.