Laserfiche WebLink
Built and verified a? <br />two Electrofracs: <br />EF1 -x140 ft <br />EF3 -200 ft.. <br />`s <br />yeti EF3 <br />i entation <br />s on EF1 <br />r o?N <br />Cored 28 observation <br />'~ holes: All intersections <br />EF9 probed are electrically <br />_ connected <br />Figure 4 Locations of Electrofracs EF1 and EF3 at Colony Mine, <br />After pumping the two ElectrofracsTM, 28 observation holes were cored to map the fractures. <br />The 3D model in Figure 4 shows the interpreted fracture shapes and the observation holes used <br />to map them. The small disks posted along the observation holes indicate the occurrence and <br />orientation of calcined coke encountered in the core. The two larger yellow disks represent <br />graphite/cement injections that provided electrical power connections to complete the <br />ElectrofracTM circuit. <br />The low-temperature heating experiment at EF3 was operated under thermostatic control to <br />ensure a maximum temperature of 1409F. Temperature was monitored at over 1200 locations in <br />the rock around the ElectrofraJm heater using a combination of thermocouples and fiber optic <br />temperature measurements. During the July 27 to October 30, 2009 test period, an average <br />power of 8 kW was delivered to the fracture. <br />ELECTROFRACTM HIGH-TEMPERATURE TESTING <br />Under this Technical Revision, ExxonMobil will proceed to the next stage of its research, which <br />includes limited high-temperature testing of one or more ElectrofracTM heaters. The typical <br />high-temperature test will apply greater electrical power to an ElectrofracTM heater to attain <br />temperatures sufficient to pyrolyze the adjacent rock. This will likely produce small amounts of <br />liquid and gaseous hydrocarbons. ExxonMobil will install production wells at strategic locations <br />7 <br />#1445022 vl den