Laserfiche WebLink
Jim Pinasco <br /> October 22, 1992 <br /> Page Four <br /> Comment 6 <br /> On page 3-20, regarding Well 2 the Draft Report states: <br /> "The cement bond and compensated density logs did not <br /> indicate the presence of cement between the well casing and the <br /> surrounding formation. The log did indicate the presence of <br /> possible void spaces between the outside of well casing and the <br /> formation at the following depth intervals: <br /> 15 to 25 feet below grade <br /> 120 to 124 feet below grade <br /> 129 to 150 feet below grade <br /> Based on these results, it was decided to perforate the <br /> casing at depth intervals of 15 to 55 feet, 120 to 124 feet, and <br /> 129 to 150 feet below grade. " <br /> GSU disagrees with the above interpretation of the depths of <br /> possible void spaces. GSU interprets that there is no bond <br /> between the casing and the formation between 22 feet and 107 feet <br /> below grade, and that the formation is fairly well bonded to the <br /> casing from 107 feet and total depth of the casing. <br /> Recommendation <br /> The well casing should have been perforated from 64 feet to <br /> 74 feet below grade and from 100 feet to 110 feet below grade <br /> because these intervals are within the interval (22 feet to 107 <br /> feet below grade) which GSU interprets as lacking of a good seal, <br /> and because these intervals are interpreted by GSU to be opposite <br /> clay units from the neutron and lithologic logs. <br /> The casing should not have been perforated at intervals <br /> interpreted to be coarse grained. <br />