B08 Attachment 3 - Sample Task Order.docx

UNITED STATES DEPARTMENT OF THE INTERIOR

BUREAU OF OCEAN ENERGY MANAGEMENT

Reprocessing of vintage 2-D seismic reflection data in the OCS and nearshore areas of Alaska Task Order 1: PSTM Seismic Reprocessing

2.1 BACKGROUND

The Bureau of Ocean Energy Management (BOEM) Alaska Offshore Continental Shelf (AOCS) Resource Evaluation (RE) Office mission is to investigate the mineral potential of Alaska's OCS (mainly for oil and gas potential), and to ensure that the federal government receives fair market value (FMV) for OCS oil and gas leases that it awards to private firms through a competitive bidding process.

The RE section uses seismic and well data to create maps that identify those areas of the Alaska OCS likely to contain oil and gas accumulations. RE also carries out regional assessments of the undiscovered oil and gas potential of the Alaskan OCS. These assessments are used to identify those areas offering the greatest potential, and to guide leasing and exploration policies and programs.

Many areas of the U.S. Alaskan OCS remain untested by exploration drilling. Direct observations and samples of subsurface rock formations that may contain petroleum resources, therefore, are very limited in these areas. For this reason, seismic reflection data is the main tool for interpreting subsurface geology and for evaluating the potential for these areas to contain petroleum resources. Across much of these unexplored or lightly explored areas, only vintage 2-D seismic reflection data, collected 20 to 50 years ago, is available. BOEM will procure contract services to reprocess selected portions of the vintage 2-D seismic reflection data with the objective to enhance the resolution of the data and facilitate improved interpretation of subsurface rock formations.

2.2 OBJECTIVE

The objective of this Task Order is to obtain state-of-the-art prestack time migration reprocessing (PSTM) for approximately 420 line miles of 1992 WesternGeco (WGC) 2-D marine reflection seismic data located in the Lower Cook Inlet and Shelikof Straits, Alaska. This Task Order is being issued under Indefinite Delivery Indefinite Quantity (IDIQ) contract #TBD to fulfill the need described above.

2.3 SCOPE OF WORK

There are special challenges to imaging seismic data in in the Cook Inlet that must be considered during data processing. The area is affected by strong tidal currents which cause feathering of streamer cables and introduce errors into survey geometries. The seabed is highly variable in composition and ranges between hard rock, soft mud, clay/gravel, and sand dunes. The shallow section contains thin coal beds which act to attenuate high frequency portions of the data signal. The subsurface is significantly deformed by folds and wrench faults in both older, relatively brittle rocks and in younger, relatively ductile rocks, many of which faults have offset expression at the seafloor. The vintage nature of the data also creates special challenges for reprocessing associated with incomplete/missing navigation files (P190).

BOEM will deliver to successful bidder field data for all vintage 2-D seismic reflection field data to be reprocessed, along with relevant well velocities, and vintage stacked data, with initial data set from the area delivered within 5 working days of contract award.

Please refer to the Section 2.4 below Work for additional information on the deliverables for seismic processing.

Table 1 lists lines 2-D seismic lines selected for PSTM reprocessing under this task order:

Total: 419

Figure 1: Map of 2-D seismic lines selected for PSTM reprocessing under this task order

2.4 MEETINGS, REPORTS, AND OTHER DELIVERABLES

The following deliverables shall be submitted and meetings held in accordance with the schedules specified in Section 2.5. The Contractor shall be responsible for editing and proofreading all material in order to prepare products as error free as possible prior to their delivery to BOEM. All data will be delivered to BOEM on an electronic storage device at competition of the project.

2.4.1 Post Award Meeting and Summary

The Contractor shall participate in a post-award meeting no later than three (3) weeks after date of award via video or teleconference. The contractor shall present the technical and management plan, including the purpose of the project, the scope, roles and responsibilities of the project team, the deliverables, the risks, the assumptions, the planned effort, and the deadline. All technical and management issues will be resolved. The Contractor shall provide a draft agenda to the COR and CO at least three (3) days prior to the meeting. Within one (1) week after the meeting, the Contractor shall deliver to the COR and CO a Meeting Summary, detailing the discussions of technical or managerial issues and any mutually agreed to decisions. Any agreed to changes that might affect the contract are subject to approval in writing by the CO via a contract modification.

2.4.2 Monthly Status Reports

The Contractor shall prepare and submit a monthly status report via email no later than the deadline specified under 2.5 below. These reports shall be in sufficient detail to describe all work accomplished and results achieved during the month and shall include a brief discussion of the planned actions for the succeeding month. These reports shall note any significant problems (i.e., unanticipated project completion impediments, recommended remedies and effect on projected completion date and final product) that were encountered and their resolution (if any) as well as recommendations for improving the project or its deliverables.

2.4.3 Periodic Update Meetings (on ‘as needed’ basis):

The Contractor shall participate in periodic update meetings with BOEM via teleconference or video conference during critical reprocessing phases of this Task Order at a time agreed to by the Contractor and COR. Upon request, a summary of the discussions shall be provided by the Contractor to the COR no later than three (3) days following the meeting or as specified in the deliverable table. The Periodic Update Meetings are held for specific purposes, i.e., Issue resolution, management update, or other project related topics.

2.4.4 Pre-stack Time Migration Processing (PSTM)

1. Pre-stack time migration processing shall consist of state-of-the-art 2-D PSTM, including:

0. Noise attenuation

0. Preservation of amplitudes

0. Coherency and frequency enhancement

0. Particular consideration should be given to the subsurface geology of the area, specifically:

3. Likelihood of abrupt lateral and vertical velocity variations

3. Likelihood of anisotropic velocities

3. Likelihood of steep dips locally

0. Dense, spatially continuous velocity and intersection tie analysis

0. Consistency in velocity and statics at line intersections

2.4.5 The Contractor shall submit pre-processed gathers with geometry corrections.

2.4.6 The Contractor shall submit pre-processed pre-stack gathers (input to migration).

2.4.7 The Contractor shall submit pre-processed (field) gathers with geometry corrections in SEG-Y format.

2.4.8 The Contractor shall submit stacking (NMO) velocities in SEG-Y or ASCII format.

2.4.9 The Contractor shall submit pre-processed pre-stack gathers (input to migration) in SEG-Y format.

2.4.10 The Contractor shall submit raw PSTM gathers in SEG-Y format.

2.4.11 The Contractor shall submit enhanced PSTM gathers (input to stack) and raw PSTM stack in SEG-Y format.

2.4.12 The Contractor shall submit final enhanced PSTM stack in SEG-Y format.

2.4.13 The Contractor shall submit pre-stack time migration velocity field (interval) in SEG-Y or ASCII format.

2.4.14 The Contractor shall submit final velocity-depth model (interval) in SEG-Y or ASCII format.

2.4.15 The Contractor shall submit final PSTM angle stack volumes in SEG-Y format.

2.4.16 The Contractor shall submit final navigation file in appropriate NAD 83 UTM zone north projection.

2.4.17 The Contractor shall submit a final processing report. The final processing report shall describe all processing steps and flow for final PSTM or PSDM.

2.4.18 The Contractor shall submit Listings of the seismic lines contained on the digital storage device. Digital copies of SEG-Y byte positions for the final stack SEG-Y data, including shot point field and loading parameters for the data set including sample rate, record length, and trace coordinates including datum and projection.

Final stack volumes will be zero-phase processing such that a peak represents an increase in impedance. EBCDIC headers will describe the area name, line name, shot point range, recording parameters, and processing history. The final processing report shall describe all processing steps and flow for final PSTM or PSDM stack deliverables.

The Contractor shall provide all data generated through this project on an external electronic storage device, in accordance with Section 2.5.

2.5. SCHEDULE AND DISTRIBUTION OF DELIVERABLES

Deliverable products shall be submitted to the addresses shown in Section 2.6 in accordance with the following schedule:

Monthly Status Reports (2.4.2)

COR, CO

One (1) digital copy each via email.

The 15th of the month following each calendar month

one (1) digital copy each Within 3 days following periodic update meeting, if requested from COR.

[To be inserted at time of award] Contracting Officer [CO] David Jablonski U.S. Department of the Interior Bureau of Safety and Environmental Enforcement Acquisition Operations Branch 45600 Woodland Road, MS VAE-AMD Sterling, VA 20166-9216 Email: David.Jablonski@bsee.gov

2.7 SCIENTIFIC INTEGRITY

Scientific integrity is vital to Department of the Interior (DOI) activities under which scientific research, data, summaries, syntheses, interpretations, presentations, and/or publications are developed and used. Failure to uphold the highest degree of scientific integrity will result not only in potentially flawed scientific results, interpretations, and applications but will damage DOI’s reputation and ability to uphold the public’s trust. All work performed must comply with the DOI Scientific Integrity Policy posted to http://www.doi.gov, or its equivalent as provided by their organization or State law.

2.8 PERIOD OF PERFORMANCE FOR SAMPLE TASK ORDER

The period of performance for this sample task order will be 12 months from date of award.

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