2016-04-15_HYDROLOGY - M1999005

• Permit No: M1999005
• IBM Index Class Name: Hydrology
• Doc Date: 4/15/2016
• Doc Name: Requested Information for Monitoring Well
• From: Daub & Associates, Inc.
• To: DRMS
• Email Name: THM
• Media Type: D
• Archive: No

Cementing Details
Conductor Casing
o Annular volume 0.20138 ft3/ft. = 0.035868 bbl/ft(set at 90')
o Density 13.5 to15.0 Ib/gal
o Mixture Portland Type 1/11 neat cement (add CaC12 if necessary)
o Cement Volume -3.23 bbls (with 50% excess = -4.84 bbls)
Monitor Well Casing
o Annular volume 0.0275 bbl/ft to 90'; 0.0214 bbl/ft to 1734'; 0.04 bbl/ft to 1749' (TD)
■Density 13.5 to 15.0 Ibs/gal
■Mixture EXTENDACEM or equivalent w/0.125 Ib/sk. Poly-E-Flake
o Volume -38.27 bbls, minimum 50% excess = 57.52 bbis (to be verified subsequent
to open hole Gamma/Density/Caliper logging.
Appendix B -- Conductor & Monitor Hole Intervals:
Conductor Hole
1. Prepare surface pad location.
• If bedrock is encountered while digging pits a paleontologist must be onsite to observe
and record operations.
2. Mobilize Rotary Drilling Rig.
• Perform safety audit during rig up to ensure that equipment and setup complies with NS
project and safety requirements.
3. Pick up 9.750" BHA and drill conductor hole to ±90 feet.
• Consider the length of surface casing string that will be run.
• Surface casing will be 20' to 22' lengths, Range 1 or 40' to 45' lengths, Range 3.
• Record the depth at which bedrock is located.
• Record the depth at which any occurrence of groundwater is detected.
4. Install 7.625" casing to ±90'.
• Ensure top of casing is set flush with ground level.
• Install centralizers (9.875" x 7.625") at 3 locations: 2 feet from bottom, and at 30 feet and
10 feet from surface.
5. Grout annular space from TD (-90') to surface with cement.
• Plan on 50% excess cement.
• Wait for cement to cure for at least 8 hours.
• Take sample of cement to help determine set-up time.
• Top off annular space prior to re-entering hole.
6. Survey top of outer most casing
• DRG has set an elevation control point- Daub to survey elevation (plan this during WOC
time if possible).
Monitor Hole Interval - Rotary Rig
1. Rig up diverter.
2. Pick up a 6.5" drill bit and (BHA).
3. Trip in hole and rotary drill 6.5" hole using light mud to -r1749 feet, -15 feet below projected
top of the L-5 (as determined by Daub geologist).
• Avoid excessive weight on bit to limit hole deviation.
• Take 5 foot rotary drill cutting (RDC) samples starting at -r50' above the top of the R-8
Zone to confirm and check actual tops with the projected tops.
• TD will be determined by onsite geologist based on rotary cutting samples.
4. Plan for rubblized and fractured rock, and lost circulation.
5. Circulate and condition hole at TD.
Daub &Associates, Inc. Page 9 of 12 Printed: 4/5/2016