| Engineer | Form: (02)
400061706
08/16/2010 | 1)COMPLIANCE WITH THE MOST CURRENT REVISION OF THE NORTHWEST COLORADO NOTIFICATION POLICY IS REQUIRED.
2)GARFIELD COUNTY RULISON FIELD NOTICE TO OPERATORS. NOTE: ALL NOTICES SHALL BE GIVEN VIA E-MAIL. SEE ATTACHED NOTICE
3)NEW MAMM CREEK FIELD NOTICE TO OPERATORS APPLIES TO THIS WELL. NOTE: ALL NOTICES SHALL BE GIVEN VIA E-MAIL. SEE ATTACHED NOTICE
4)THE PROPOSED SURFACE CASING IS MORE THAN 50' BELOW THE DEPTH OF THE DEEPEST WATER WELL WITHIN 1MILE OF THE SURFACE LOCATION WHEN CORRECTED FOR ELEVATION DIFFERENCES. THE DEEPEST WATER WELL WITHIN 1 MILE IS 450 FEET DEEP.
5)SUBMIT PASON OR EQUIVALENT MUD LOG DATA FROM SURFACE TO TOTAL WELL DEPTH WITH THE REQUEST TO COMPLETE.
6)SUBMIT ALL ELECTRONIC DRILLING RECORDER DATA IN ADDITION TO A MUD/DRILLING LOG FROM SURFACE TO TOTAL DEPTH DRILLED FOR THE FIRST WELL DRILLED ON THIS PAD WITH THE FOLLOWING CURVATURE DATA: RATE OF PENETRATION (ROP), GAS, MUD VOLUME, TORQUE, DIFFERENTIAL PRESSURE AND WEIGHT ON BIT (WOB).
7)SUBMIT THE FOLLOWING OPEN-HOLE LOGS ON THE SURFACE HOLE FOR THE FIRST WELL DRILLED ON THIS PAD, VIA EMIAL TO COGCC WESTERN COLORADO ENGINEERING SUPERVISOR, WITHIN 24HS OF RUNNING AND WITH FORM 5: SPONTANEOUS POTENTIAL, GAMMA RAY, FORMATION DENSITY, COMPENSATED NEUTRON, AND RESISTIVITY (TRIPLE COMBO).
8)SUBMIT THE FOLLOWING OPEN-HOLE LOGS ON THE PRODUCTION HOLE, FOR AT LEAST ONE WELL PER PAD (ON THE F12E, PREFERABLY ONE OF THE WELLS BEING DRILLED TO THE NORTHWEST OF THE PAD), FROM TOTAL WELL DEPTH TO SURFACE CASING SHOE WITH FORM 5: SPONTANEOUS POTENTIAL, GAMMA RAY, FORMATION DENSITY, COMPENSATED NEUTRON, AND RESISTIVITY (TRIPLE COMBO).
9)80% EXCESS CEMENT, OVER THE CALCULATED VOLUME REQUIRED TO FILL THE ENTIRE ANNULUS, IS REQUIRED TO BE PUMPED ON THE SURFACE CASING CEMENT JOB. SUBMIT CEMENT TICKETS AS AN ATTACHMENT TO THE REQUEST TO COMPLETE, FOR VERIFICATION OF CEMENT VOLUMES.
10)IF LOST CIRCULATION OF 20 BBL/HR OR MORE IS EXPERIENCED AT ANY TIME DURING THE DRILLING OF THIS WELL, OPERATOR SHALL STOP DRILLING, PUMP LOST CIRCULATION MATERIAL AS NEEDED.
11)IF LOST CIRCULATION OF 100+ BBLS WITHIN 24 HR OR MAJOR GAS (GAS OVER 1800 UNITS WHILE DRILLING) OCCURS AT A TRUE VERTICAL DEPTH LESS THAN 4200’, OPERATOR SHALL NOTIFY COGCC’S WESTERN COLORADO ENGINEERING SUPERVISOR WITHIN 24 HOURS, AND PRIOR TO RUNNING CASING, TO DISCUSS THE OPTIONS FOR UTILIZING A DV TOOL ON PRODUCTION OR INTERMEDIATE CASING.
12)PRODUCTION CASING CEMENT TOP MUST BE 500’ ABOVE THE SHALLOWEST GAS SIGNATURE OBSERVED ON MUD LOGS OR OPEN-HOLE LOGS. THE SHALLOWEST GAS SIGNATURE, AS DEFINED BY 2500 UNITS, DEPTH SHALL BE REPORTED ON THE REQUEST TO COMPLETE.
13)SURFACE CASING SHALL BE SET A MINIMUM OF 50’ BELOW THE MOLINA MEMBER OF THE WASATCH FORMATION. THE MOLINA AND ATWELL GULCH MEMBERS OF THE WASATCH FORMATION TOPS SHALL BE REPORTED ON THE REQUEST TO COMPLETE.
14)SUBMIT 48 HOUR NOTICES, VIA EMIAL, FOR RUNNING AND CEMENTING ALL CASING STRINGS AND PERFORMING A WELL CONTROL DRILL TO COGCC’S GARFIELD COUNTY FIELD INSPECTOR, COGCC’S NORTHWEST AREA FIELD INSPECTION SUPERVISOR, AND COGCC’S WESTERN COLORADO ENGINEERING SUPERVISOR. CONTACT INFORMATION FOR NOTICES CAN BE FOUND ON COGCC’S CURRENT NOTIFICATION POLICY.
15)FRESH WATER DRILLING MUD MUST BE UTILIZED DURING THE DRILLING OF THE SURFACE CASING INTERVAL, AS OPPOSED TO WATER ONLY. MUD THAT HAS BEEN USED TO DRILL A PRODUCTION INTERVAL MAY NOT BE REUSED TO DRILL ANOTHER SURFACE INTERVAL.
16)CENTRALIZER SYSTEMS MUST BE DESIGNED TO ACHIEVE A MINIMUM OF 50% STANDOFF ON ALL CASING STRINGS. REPORT CENTRALIZER PLACEMENT AND CALCULATED STANDOFF ON THE REQUEST TO COMPLETE.
17)RUN A CEMENT EVALUATION TOOL ON ALL CASING STRINGS, BEFORE DRILL OUT OF EACH SHOE, FROM FLOAT COLLAR TO SURFACE. TIMING OF THE LOGS SHALL BE BASED ON COMPRESSIVE STRENGTH TESTS OF SLURRIES PROVIDED BY CEMENT SERVICE PROVIDER. ALL LOGS SHALL BE PROVIDED WITH THE REQUEST TO COMPLETE
18)UTILIZE INTERMEDIATE CASING IF THE FORMATION INTEGRITY TEST FAILS OR IF THE SURFACE CASING REQUIRES PERFORATION AND CEMENT SQUEEZING.
19)SUBMIT DAILY DRILLING REPORTS TO COGCC WITH THE REQUEST TO COMPLETE.
20)SUBMIT DAILY WELL STIMULATION REPORTS TO COGCC WITH THE FORM 5 DRILLING COMPLETION REPORT.
21)COLLECT SAMPLES FOR LABORATORY ANALYSIS FROM THE 2 DOMESTIC WATER WELLS LOCATED WITHIN ½ MILE OF THE F12E WELL PAD (LANGEGGER AND EICHER WELLS) AND EXISTING MONITORING WELLS (MW-2 AND (MW-4) PRE-AND POST-DRILLING OF GAS WELLS TWIN CREEK 12-4A1, TWIN CREEK 12-4D1, TWIN CREEK 12-5A2, TWIN CREEK 12-5A1, AND TWIN CREEK 12-5D1. WATER SAMPLE ANALYSIS MUST INCLUDE DISSOLVED METHANE, BTEX, MAJOR ANIONS AND CATIONS. IF THE CONCENTRATION OF DISSOLVED METHANE IS >1.1 MG/L, COLLECT A SAMPLE FOR ANALYSIS OF GAS COMPOSITION AND OF THE STABLE ISOTOPES OF METHANE.
22)CONDUCT DOCUMENTED VISUAL MONITORING OF WEST DIVIDE CREEK (WDC) AND OTHER SURFACE STREAMS AND PONDS IN SECTION 12, R7S T92W FOR THE PRESENCE OF NATURAL GAS, AIR, OR OTHER GAS BUBBLES WHILE DRILLING AND FRACING GAS WELLS TWIN CREEK 12-4A1, TWIN CREEK 12-4D1, TWIN CREEK 12-5A2, TWIN CREEK 12-5A1, AND TWIN CREEK 12-5D1.
23)INCREASE FREQUENCY AND FOCUS OF DOCUMENTED VISUAL MONITORING OF WDC IN SECTIONS 12, R7S T92W WHEN THE BOREHOLE OF ANY GAS WELL BEGINS TO PASS BENEATH WDC.
24)IF VISUAL MONITORING OR ANY OTHER OBSERVATION INDICATES THAT THERE IS AN INCREASE IN THE PRESENCE NATURAL GAS, AIR, OTHER GAS OR FLUID DISCHARGING INTO WDC, OTHER SURFACE WATER, OR GROUND WATER WHILE DRILLING AND FRACING, NOTIFY COGCC STAFF AND LANDOWNER AS SOON AS PRACTICAL, BUT NO LATER THAN 24 HOURS AFTER OBSERVATION
25)IF VISUAL MONITORING OR ANY OTHER OBSERVATION INDICATES THAT THERE IS AN INCREASE IN THE PRESENCE OF NATURAL GAS, AIR, OTHER GAS, OR FLUID DISCHARGING INTO WDC, OTHER SURFACE WATER, OR GROUND WATER DURING DRILLING AND FRACING, SUBMIT THE CHEMICAL INVENTORY (REFER TO RULE 205.C) TO THE COGCC AS SOON AS PRACTICAL, BUT NO LATER THAN 24 HOURS AFTER OBSERVATION.
26)IF VISUAL MONITORING OR ANY OTHER OBSERVATION INDICATES THAT THERE IS AN INCREASE IN THE PRESENCE OF NATURAL GAS, AIR, OTHER GAS, OR FLUID DISCHARGING INTO WDC, OTHER SURFACE WATER, OR GROUND WATER DURING DRILLING AND FRACING, COLLECT SAMPLES FOR LABORATORY ANALYSIS FROM SURFACE WATER BODIES AND ALL WELLS IDENTIFIED IN COA ENV-1. THE SAMPLES SHALL BE ANALYZED FOR THE PARAMETER LIST IDENTIFIED IN COA ENV-1 AND OTHER PARAMETERS AGREED TO BASED ON THE CHEMICAL INVENTORY OR OTHER PROCESS KNOWLEDGE.
27)PROVIDE A SCHEDULE AND LOCATIONS FOR VISUAL MONITORING OF WDC AND SURFACE WATER BODIES. THE SCHEDULE WILL BE APPROVED BY COGCC STAFF PRIOR TO INITIATION OF DRILLING ACTIVITIES.
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