POO PNRA Nuna Exploration Program 20110919 (1)

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<ul><li><p>PIONEER NATURAL RESOURCES ALASKA </p><p>Pioneer Natural Resources Alaska, Inc. 700 G Street, Suite 700 Anchorage, Alaska 99501 </p><p>2011-12 North Slope Exploration Program North Slope, Alaska </p><p>Plan of Operations </p><p>August 2011 </p><p>Submitted to: </p><p>State of Alaska Department of Natural Resources Division of Oil and Gas </p></li><li><p>2011-12 North Slope Exploration Program P'^ " of Operations </p><p>Table of Contents Page 1 Introduction and Project Description 1 2 Lease Description 1 3 Schedule 1 4 Ddllsite Access 2 5 Wellsite and Locations 3 6 Water Requirements and Sources 3 7 Drillings Fracturing, and Testing 4 </p><p>7.1 Non-Drilling Wastes 4 7.2 Disposal of Drilling Wastes 5 7.3 Produced Fluids 5 </p><p>8 Air Emission 6 9 Ancillary Facilities 6 10 Historic, Archaeological, and Cultural Resources 6 11 Well Abandonment and Site Closure 6 12 Contingency Plans 7 </p><p>12.1 Oil Discharge Prevention and Contingency Plan 7 12.2 SpiU Prevention Control and Countermeasures Plans 7 12.3 Other Plans 7 </p><p>13 Wildlife 7 13.1 Interaction Plans 7 13.2 Fish Habitat 8 13-3 Wildlife Habitat 8 </p><p>14 Contact List 9 15 training 9 16 public Involvement 10 17 Native and Local Hire Policy 10 18 Potential Permits and Authorizations List 10 </p><p>List of Figures Figure 1 Project Location Map Figure 2 Typical Onshore and Sea Ice Pads and Ice Road Cross Sections Figure 3 Typical Drilling Operation Layout Figure 4 Typical Well Test Operation Layout </p><p>Appendix A North Slope Exploration Project - Lease Mitigation Measures </p><p>Pioneer Natural Resources Alaska, Inc. Page il August 2011 </p></li><li><p>2011-12 North Slope Exploration Program Plan of Operations </p><p>1 Introduction and Project Description Pioneer Natural Resources Alaska, Inc. (Pioneer) is proposing to drill and test two exploration wells from ice pads on State of Alaska oil and gas leases during the 2011-2012 winter season (Figure 1, Project Location Map). These wellsites are located near the eastern edge of the Colville River delta on the south side of Harrison Bay. One well (Nuna No. 1) will be drilled at the proposed onshore Nuna Drillsite 1 (NDSl) location which is located 2.5 mile northwest of Kuparuk River Unit (KRU) drillsite 3-S (DS-3S). This well will be preserved as a development well as part of the Nima project (Nuna). The other well (Sikumi No.l) will be drilled approximately 2 miles west of the Oooguruk Drillsite (ODS), immediately offshore of the Colville River, and plugged and abandoned after completion of activities. </p><p>The wellsites will be approximately 600 ft by 600 ft (8 acres), providing room for the drilling rig and camp, a temporary services camp, materials storage, and related activities. A 5-acre ice pad will be constructed adjacent and east of DS-3S which will be used for storage of materials and equipment. </p><p>After completion of drilling each well, a geophysical survey (checkshot survey) will be performed. At Nuna #1, the checkshot survey will require a packed snow road northwest of the pad for the vibrator truck. </p><p>Hydraulic fracture stimulation and flow testing is planned for each well. Produced fluids will be transported to production facilities. After completion of drilling and testing, all equipment will be removed from the pads and tt\e well sites will be cleaned. </p><p>2 Lease Description </p><p>The Exploration program surface activities will be located on Alaska Oil and Gas leases ADL 355037 and 25528. 2010 North Slope Areawide Mitigation Measures apply to this project. An analysis of the mitigation measure compliance is included as Appendix A. </p><p>3 Schedule Ice road and ice pad construction will begin as soon as the necessary permits/approvals are available and weather conditions allow. Pioneer will begin pre-packing snow on the tundra portions of the ice road, staging pad, and Nuna No. 1 wellsite using state approved all terrain vehicles as early as November. Thermistors will be installed at the Nuna No. 1 wellsite and along the ice road route to monitor soil temperatures to support early access of the tundra. Drilling will begin in early January for the Nuna No. 1 and in mid February 2012 for tiie Sikumi No. 1 well. </p><p>Pioneer Natural Resources Alaska, Inc. Page 1 August 2011 </p></li><li><p>2011-12 North Slope Exploration Program Plan of Operations </p><p>Well fracturing and testing will be performed at both well locations. Current plans are to plug and abandon the Sikumi No.l well and suspend the Nuna No. 1 well until final plans are made for development. </p><p>Activity Permit Review and Approvals </p><p>Ice Road and Pad Construction </p><p>DriU Nuna No, 1 Well </p><p>Drill Sikumi No.l Well </p><p>Fracture Stimulation Operations </p><p>Testing Operations </p><p>Plug &amp; Abandon Sikumi No. 1 Well </p><p>Suspend Nuna No. 1 Well </p><p>Demobilizatiori of Rig and Equipment </p><p>Cleanup Ice Pads </p><p>Schedule Fall 2011 </p><p>November 20n-January 2012 </p><p>January 2012 </p><p>February 2012 </p><p>January- Mid April 2012 </p><p>March- AprU 2012 </p><p>AprU- May 2012 </p><p>April 2012 </p><p>Late April-Early May 2012 </p><p>Late April-Early May 2012 </p><p>4 Drillsite Access Access routes to the Nuna No. 1 wellsite will be via ice roads coimecting to the existing gravel KRU road system at DS-3S. Access to the Sikumi No. 1 wellsite will be via an extension of the annual Oooguruk ice road route from the Oooguruk Tie-in Pad (OTP) to the Oooguruk Drillsite (ODS) and a connection to the Nuna No. 1 ice road. Figure 1 shows the proposed ice road routes. </p><p>Ice roads are expected to be 55 ft wide. Typical onshore and sea ice pads and ice road cross sections are shown on Figure 2. 5-acre ice pads will be constructed adjacent and east of DS-3S and southwest of DS-3H, which will be used for storage of materials and equipment. </p><p>Using permitted freshwater sources and existing packed snow as the road base, the road and wellsites will be built up until sufficient strength and thickness are obtained to support project equipment loads. Ice chips may be used as needed if weather or construction conditions warrant their use (See Figure 1 for location of potential water sources). Rig mats or similar material may be used on or in the construction of ice roads at selected locations as required by field conditions. Such equipment will be removed prior to the end of the operating season. Ice roads and ice pads may be scarified with equipment to reduce slickness for safety purposes. Approximately 18 miles of ice roads will be constructed. </p><p>Access to the existing operating fields via the Dalton Highway is controlled at existing security checkpoints. BP Security will stop any general public visitor from accessing Pioneer's location at the Prudhoe Bay/Deadhorse Security access point unless granted by Pioneer. The wellsites </p><p>Pioneer Natural Ftesources Alaska, Inc. Page 2 August 2011 </p></li><li><p>2011-12 North Slope Exploration Program Plan of Operations </p><p>will be closed to ti\e general public for purposes of safety. Exceptions may include aid in the event of an emergency situation. </p><p>5 Wellsite and Locations Each wellsite will be constructed of ice and be approximately 8 acres. See Figures 4 and 5 for typical wellsite layouts for drilling and fracturing and well testing operations. </p><p>The exploration drilling locations are: </p><p>Nuna No. 1 Umiat T12N, R7E, Sec 2 ADL 25528 Sikumi No. 1 Umiat, T13H R7E, Sec 16 ADL 355037 </p><p>6 Water Requirements and Sources This section describes water requirements for construction and operations at each wellsite and the connecting ice roads. Permitted sources along the ice road system would be used as water and ice Aggregate sources for ice road and ice pad construction under existing temporary water use permits. </p><p>All ice roads and wellsites will be built using a combination of existing snow along the route, freshwater pumped from lakes along the ice roads, and freshwater ice chips off lakes along the ice roads. The offshore ice roads and pads will be thickened by successive flooding and freezing of seawater prior to application of a fresh water cap. Offshore roads could use a combination of water from onshore sources or from discharge channels of the Colville River. Fresh water is also needed for ice road and pad maintenance, drilling operations, and camp use. </p><p>Approximately 78 million gallons of water will be required to support ice road and pad construction. An additional 1,000,000 gallons of water will be required to support drilling operations and the camps will need about 1,000,000 gallons of fresh water. A maximum of approximately 80 million gallons (246 acre ft) of water will be required to support the project with approximately 150 days of drilling operations including ice road and pad construction and maintenance. </p><p>The drilling rig camp is equipped to convert freshwater from lakes to potable water for camp use. The camp is permitted as a certified public water system with the Alaska Department of Environmental Conservation (ADEC), which is maintained by the camp contractor. </p><p>The temporary service camp will have a water storage system to hold fresh water provided from a commercial source in Kuparuk or Prudhoe Bay. </p><p>Pioneer will consult with the Alaska Department of Natural Resources (ADNR) water division and the Alaska Department of Fish &amp; Game (ADF&amp;G) regarding using Colville River water or Pioneer Natural Resources Alaska, Inc. Page 3 </p><p>August 2011 </p></li><li><p>2011-12 North Slope Exploration Program Plan of Operations </p><p>ice to support ice road and ice pad construction and maintenance and secure any needed permits. </p><p>7 Drilling, Fracturing, and Testing </p><p>The Nuna No. 1 well will use extended reach drilling to access the reservoir from the proposed location of Nuna Drillsite 1 (NDSl). The Sikumi No. 1 well be a more typical vertical well bore design be similar to previous North Slope exploration wells. The actual well bore design is part of the Drilling Permit issued by the Alaska Oil and Gas Conservation Commission (AOGCC). Due to the exploratory nature of the well, nearly all information regarding the downhole aspects of the well is confidential. </p><p>After completion of drilling each well, a geophysical survey (checkshot survey) will be performed. The survey, consisting of borehole seismic measurements, will be used to calibrate existing seismic date and enable Pioneer to construct more accurate depth maps to the reservoir for future drilling. Measurements will be made in the pilot wellbore using geophones inside the wellbore and an energy source (vibrator) on the surface. The geophone is lowered in the well via wireline similar to any other geophysical log. The vibrator unit is based on a rolligon vehicle. Because the Nuna well is a high-departure well, this source will be used at discrete positions along the surface trace of the borehole, up to % mile into the Colville River Delta. The vibrator will be located on or near the ice pad for the Sikumi No. 1 well. </p><p>Prior to flow testing, each well may be fracture-stimulated. The frac equipment will include: chemical storage for liquid and dry materials (Frac Cat); blender; frac pumps; frac tanks for seawater; fluids and gel mixers; manifold; hot oiler; diesel truck, boom truck; sand silos; and sand transport and conveyor systems. </p><p>Chemicals staged on the ice pads prior to injection will include: proppant (sand); crosslinker; slurry gel; scale inhibitor; seawater, diesel truck, surfactant; breakers; microbiocide; and 5% caustic soda. These materials will remain on the ice only as long as operationally necessary. The frac tanks and blender will be placed in secondary contairunent. The containment will be constructed of a herculite liner, timbers and/or ice berms. Spill contairunent (duck ponds) will be placed beneath tiie trucks. </p><p>Production tests will be performed as needed after production casing is set. It is plaimed for tills activity to occur once the drilling rig has moved on to its next location. Testing may include extended flow periods to determine the productivity of the well. </p><p>7.1 Non-Drilling Wastes </p><p>Solid, non-bumable waste, including scrap metal, banding material, eto., will be deposited in large containers located at each site as needed for each waste classification. These containers will be hauled appropriately to the North Slope Borough (NSB) landfill at Prudhoe Bay. Food waste will eitlier be stored in a wildlife resistance containers awaiting periodic hauling or such </p><p>Pioneer Natural Resources Alaska, Inc. Page 4 August 2011 </p></li><li><p>2011-12 North Slope Exploration Program Plan of Operations </p><p>wastes will be hauled each day to an approved waste treatment center (KRU, for example), where it will be incinerated and the ash taken to the NSB landfill. </p><p>The drilling camp will be equipped with a comprehensive sewage treatment plant. All camp wastewater would be treated to sufficientiy meet the discharge requirements of the Alaska Pollution Discharge Elimination System General Permit maintained by the camp contractor. The treated effluent will be discharged to frozen tundra or ice, monitored and reported by the camp contractor or hauled offsite for disposal to a permitted faciUty. </p><p>The temporary services camp will have a wastewater storage system and wastewater will be hauled and disposed of at a permitted facility. </p><p>7.2 Disposal of Drilling Wastes </p><p>Drilling fluids, a combination of fresh water, seawater or synethic oil-based, will be used to maintain desired drilling fluid properties and density. Excess drilling mud that can not be reused will be transported to an approved Class I or II injection well at ODS, Prudhoe Bay, or Kuparuk. An average of 20,000 gallons per day (gpd) of waste liquid from each well may require disposal, although efforts to minimize this amount will be undertaken. </p><p>All drill cuttings will be transported to a certified processing and disposal facility at ODS, Prudhoe Bay, or Kuparuk, via vacuum or super sucker truck or diposed in an approved well annulus. Cuttings may be temporarily stored in an ADEC-approved temporary drilling waste storage area. In an emergency situation, cuttings will be contained witiiin cells of the temporary waste storage area. </p><p>Upon completion of activities at each wellsite, material collected from the removal of the temporary drilling waste storage areas will be broken up and processed for Class I or II disposal at a certified disposal faciUty, or transported to the NSB landfill at Prudhoe Bay for disposal. </p><p>If drilliiig wastes are temporarily stored. Pioneer will apply to the ADEC, Division of Environmental Health for Temporary Storage of Drilling Waste and Solid Waste Treatment Plans approval, as required in 18 AAC 60.430. The drill cuttings storage area would be approximately 50 ft by 100 ft by 4 ft deep. With a working depth of 2 ft, the volume of the storage area will have a capacity of 1,800 barrels. The temporary storage area will be constructed of ice berms and compacted snow. The botton\ of the storage areas will be increased in ice thickness over the base of the pads by approximately 1 ft. The storage area will be trimmed and cleaned up after use. </p><p>7.3 Produced Fluids </p><p>Produced fluids will pass through an adequately sized test separator system to separate the gas and stored in tanks. After testing, the flui...</p></li></ul>

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