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a UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION IX ABANDONMENT HISTORY Operator San Joaquin Cogen:Limited Field _ Well"San Joaquin Cogen"No!1 County San Joaquin Sec.34 T. 1S R.6E M.D.B.&M. A.P.I.No. 1 Name Irani Engineering Title Petroleum Engineer (Person subrrittina report) Date M�'f 2,03 (President.Secretary.or Apenn (Month,dav,year) Signature Address 17200 Murphy Parkway, Lathrop,CA 95330 elephone Number J209)858-5129 History must be complete in all detail.Use this form to report all operations during drilling and testing of the well or during redrilling or altering the casing,plugging,or abandonment,with the dates thereof.Include such items as hole size,formation test details,amounts of cement used, top and bottom of plugs,perforation details,sidetracked junk,bailing tests,and initial production data. Date 2003 4-07 Moved in workover rig. The rig crews and Irani Engineering representative attended E1 Paso Safety Orientation Meeting. Opened the well and found the well with 50 psig tubing pressure and the casing was on a vacuum. Filled the casing with 2 bbls of f fresh water. Pressured the casing with 650 psig. Pumped 2 bbls of fresh water down the casing at 2 BPM! with 650 psig. The tubing pressure did not increase from the 5o psig shut in pressure. (indication of no tubing or-Packer leak, other wise the tubing pressure would have increased to 650 12sigithe same as casing Pressure. ) Pumped 2 bbls of fresh water down the tubing at 1 BPM with 700 psig for 2 bbls. The well did not circulate. Removed- the production tree. Installed Class III BOP. Tested the BOP with` 2000 psig. Released Baker Model A-3 Loc-Set packer. Pulled the i packer and reset at 500' intervals to 1480' testing the casing. The casing tested to 1200 psig at 14801 . Lowered the packer and isolated the casing leak between 1634' and 16641 . (Designated Leak Interval) . Pumped down the casing with 2 BPM for 4 bbls at 650 psig ; Released the packer, and shut the well in. 4-08 Open the well and found the well had zero tubing and casing pressure. Pulled out of the hole with Baker'.Model A-3 Loc-Set packer and 2-7/8", 6.5#, N-80, EUE tubing. The packer appeared Ito be in excellent condition. Ran in the hole with 6" OD Junk Mill (to drill out cement from 4905— 5010' and the bride pluq at 5010' -50121. ) and Ball Test Sub (to pressure test the-tubing). Tagged the top of the cement plug at 4905' .Drilled out hard cement (10'-20' Per ,hour penetratic,n rate. ) from 4905' to 4966' . Shut the well in until AM. 4-09 Drilled out hard cement from 4966' to top of Bridge Plug at 50101 . Drilled out Bridge Plug. Pulled out of the hole. Ran in the hole with open-ended 2-7/8" tubing to 96251 . Displaced the 63 pcf water from well with 346 bbls of 74 pcf mud. Cement Plug No.l: Equalized 260 sacks Class G cement (Premium High Temp Cement) premixed with 1-W Halad-322 (Fluid loss additive) and 0 .15W HR-5 (Retarder) at 9625' . Displaced the cement with 50 bbls. of 74 pcf mud. (I sack of cement has a field of 1,15 and is estimated to fill 4. 655' of 7" casing-260 sacks x 1.15 = 299 FT3 x 4.655 = I391':' Estimated top of cementat 82341. ) Pulled up the hole to 8113' and reverse circulated the well. (Reverse circulation ie to Pwnp down the 7" casing and circulate up any Possible cement stringer that could be in the 2-7/8" x 7" annulus causing tubing to become stuck. ) 4-10 Opened the well and found the tubing and casing with zero pressure. Lowered the tubing from 8113' and tagged the top of cement plug at 82111 . (Cement pluq set from 9625' to 82341) Applied 30, 000# set down weight onto cement plug. (The weight of the 2-7/8" work string at 8211' was 53,370#. Xt was noted with the weight indicator on the rig a loss of_ 30,000# when the top of the cement plug was encountered. ) Laid down the excess 2-7/8" tubing to the next cement plugging depth at 52601 .