Laserfiche WebLink
ATTACHMENT A:AREA OF REVIEW METHODS <br /> The closest well, City of Lodi #1,is approximately 0.35 miles from the injection site. This <br /> well was plugged back at the base of the surface casing. Hydrostatic pressure of the <br /> abandonment mud was reported as 75 lb/ft3. The pressure applied at 4,100 feet by the mud <br /> is approximately 2,132 psi. The pressure necessary to overcome the gel strength of the mud <br /> is estimated to be approximately 35 psi. Reservoir pressure at the well after 10 years of <br /> injection is estimated to be 2,058 psi. Therefore, 108 psi of excess hydrostatic pressure is <br /> available to prevent fluid movement within the borehole. Similar calculations for the other <br /> wells within the area of review are included in Table A-8. <br /> TABLE A-8 <br /> Pressure Increase and Hydrostatic Mud Pressure at Wells within the AOR <br /> Reservoir Pressure Pressure Excess <br /> Pressure Increase (psi) Mud Required to Hydrostatic <br /> Weight Mobilize Pressure <br /> Well Name Distance 10 year 30 year 10 year 30 Year (ppg)' Fluid(psi)2 (psi) <br /> Great Basins Petroleum <br /> Co.City of Lodi#1 1,848 279 328 2,058 2,107 10 2,167 60 <br /> Federal Oil Co. Federal <br /> Imeson#1 2,587 250 298 2,029 2,077 10.8 2,337 260 <br /> Maxus Exploration Co.Red <br /> House Fee#65-24 3,749 217 266 1,996 2,045 9.8 2,124 79 <br /> Great Basins Petroleum <br /> Co. Rio Blanco#1 7,392 158 206 1,937 1,985 10.4 2,252 267 <br /> Princeton Natural Gas, LLC <br /> Piacentine#1-27 8,448 146 194 1,925 1,973 9.6 2,081 108 <br /> Argo Petroleum Corp. <br /> Buttes-Rio Blanco#15-77X 8,873 142 190 1,921 1,969 9.9 2,145 176 <br /> Venoco, Inc. Ratto#14-1 9,504 136 184 1,915 1,963 10 2,167 204 <br /> Ferguson&Bosworth <br /> Perrin#1 10,032 131 179 1,910 1,958 10.4 2,248 290 <br /> 1Mud weight based on information from geophysical log headers <br /> 2Pressure based on hydrostatic pressure of mud column and resistance to flow from mud gel strength. <br /> Following this reasoning and the conservative assumptions related to operations described <br /> above, an AOR of 2 miles provides the required level of safety for the USDWs in the area. <br /> SAC/371322/082550016(ATTACH M ENT-A.DOC) A-9 <br />