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Hi~ay Well 213 <br /> <br />• <br />Well 21-3 History <br />(Includes Uinta, A Groove, B Groove, and D'~ssolution Surface) <br />Uinta Formation Surface - 536 ft <br />A -Groove 699 - 725 ft <br />B -Groove 906 - 930 ft <br />Dissolution Surface 1307 ft <br />Total Depth (TD) 1420 ft <br />..Stratigraphic Intervals and Maikersy,;;i.: __.>>:.~> _ ~_ _ ~_ :... -_.._._.-. _ ._...; <br />Location ~ Section 21, T1S, R97W, 6ei PM <br />Coordinates . Northing 14414.14, Easting 16623.32 <br />Collar Elevation 6122.26 ft amsl <br />Duration of Drilling July 1, 1999 through July 8, 1999 <br />Total Drilled Depth 1420 ft <br />Summary Report by American Soda July 1999 <br />Drilling and Well Completion <br />• Drilling began on we1121-3 on July <br />completed on July 8, 1999. <br />• Drilled from surface to 62 ft with a <br />1, 1999. Drilling to a TD of 1420 ft was <br />19 -inch-diameter tri-cone rock bit. <br />• A 14-inch-outside diameter (OD) surface conductor casing was run to 62 ft <br />and cemented in place. <br />• After the conductor casing cement hardened, a 12.25-inch-diameter tri- <br />cone long tooth button bit was used to advance the well to a TD of 1420 ft. <br />Rock chip samples were separated from drilling fluids in a cyclone <br />separator and passed over a shaker table for recovery at 5-ft intervals. <br />• Drilling fluid consisted of clear water, with a light bentonite and polymer <br />mud additive. Geophysical logs were recorded on July 9, 1999. <br />Dissolution Surface <br />• To prepare the borehole for the first and deepest monitor well installation, <br />the hole was cemented from 1420 ft (TD) up to 1316 ft with 77 sacks of <br />Class A Type II cement with ' 1 % calcium chloride. The cement was <br />placed via a string of 1.75-inch-OD fremie line composed of nominal 20-ft <br />pipe joints. <br />The Dissolution Zone well (21-3D) was installed after the cement set, and <br />completed with a 10-ft fiberglass, #20 slot screen at 1273 to 1283 ft near <br />the Dissolution Surface (1307 ft). <br />• The silica sand finer pack was placed from 1262 to1292 ft. Bentonite hole <br />plug was placed immediately above and below the sand filter pack at 1238 <br />to 1262 ft and 1292 to 1316 ft, respectively. All annular fill materials were <br />placed via the 2.19-inch-OD tremie line. <br />• The Dissolution Zone well casing was constructed with a string of Centron <br />2.375-inch, 1.29 1b/ft, upset end fiberglass casing in nominal 29-ft lengths <br />from surface to 1273 ft. <br />• <br />