Environmental Management Programme Report for the Development of the Kudu Gas Field on the Continental Shelf of Namibia
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CSIR REPORT: CSIR/NRE/ECO/2005/0004/C ENVIRONMENTAL MANAGEMENT PROGRAMME REPORT FOR THE DEVELOPMENT OF THE KUDU GAS FIELD ON THE CONTINENTAL SHELF OF NAMIBIA Prepared for: ENERGY AFRICA KUDU LIMITED Prepared by: P D Morant CSIR NATURAL RESOURCES AND ENVIRONMENT P O Box 320 Stellenbosch 7599 South Africa Tel: +27 21 888 2400 Fax: +27 21 888 2693 Keywords: Namibia Hydrocarbon production Coast Offshore Environmental management programme JUNE 2006 ENERGY AFRICA KUDU LIMITED ENVIRONMENTAL MANAGEMENT PROGRAMME REPORT FOR THE DEVELOPMENT OF THE KUDU GAS FIELD ON THE CONTINENTAL SHELF OF NAMIBIA SCOPE The CSIR’s Natural Resources and Environment Unit was commissioned by Energy Africa Kudu Limited to provide an environmental management programme report (EMPR) for the development and operation of the Kudu gas field on the southern Namibian continental shelf. The EMPR is based on the environmental impact assessment (EIA) for the development of the Kudu gas field (CSIR Report ENV-S-C 2004-066, December 2004 plus Addendum, December 2005). The EMPR includes an updated description of the project reflecting the finally selected design and a re-assessment of the resulting environmental impacts. The EMPR includes: An overview of the project and various component activities which may have an impact on the environment; A qualitative assessment of the various project actions on the marine and coastal environment of southern Namibia; A management plan to guide the implementation of the mitigation measures identified in the EIA. The format of the EMPR is modelled on the South African Department of Minerals and Energy’s Guidelines for the preparation of Environmental Management Programme Reports for prospecting for and exploitation of oil and gas in the marine environment, Pretoria 1996. Environmental Management Programme Report for the Development of the Kudu gas field on the continental shelf of southern Namibia Part A, Section 1, page i ENERGY AFRICA KUDU LIMITED Frontispiece: Location of the Kudu gas field and proposed power station at Uubvlei near Oranjemund, Namibia Environmental Management Programme Report for the Development of the Kudu gas field on the continental shelf of southern Namibia Part A, Section 1, page ii ENERGY AFRICA KUDU LIMITED CONTENTS Environmental Management Programme Report Introduction.............................................................................................................1.1 PART A SECTION 1: GENERAL INFORMATION 1.1 HOLDER OF PRODUCTION LICENCE _____________________________ 1.2 1.2 NAMIBIA: MANAGER/RESPONSIBLE PERSON_____________________ 1.2 1.3 KUDU PRODUCTION LICENCE___________________________________ 1.3 1.3.1 The Production Licence _______________________________________________________ 1.3 1.3.2 Location of Kudu Gas Field and Production Area____________________________________ 1.4 1.3.3 Surface Area ________________________________________________________________ 1.4 1.3.4 Infrastructure ________________________________________________________________ 1.4 1.3.5 Location of other projects ______________________________________________________ 1.6 1.4 DESCRIPTION OF THE KUDU GAS FIELD DEVELOPMENT PROJECT __ 1.7 SECTION 2: DETAILED DESCRIPTION OF THE KUDU GAS FIELD DEVELOPMENT PROJECT 2. PROJECT DESCRIPTION _______________________________________2-1 2.1 HISTORY OF THE KUDU GAS DISCOVERY ________________________2-1 2.1.1 Geological history ____________________________________________________________ 2-1 2.1.2 Exploration history____________________________________________________________ 2-1 2.2 NEIGHBOURING LICENCE HOLDERS _____________________________2-3 2.2.1 Petroleum Exploration Licence Areas_____________________________________________ 2-3 2.2.2 Diamond Prospecting and Mining Licence Areas ____________________________________ 2-3 2.3 DRILLING ____________________________________________________2-5 2.3.1 Introduction _________________________________________________________________ 2-5 2.3.2 Drilling Unit _________________________________________________________________ 2-6 2.3.3 Drilling Operations____________________________________________________________ 2-6 2.3.4 Drilling Muds _______________________________________________________________ 2-11 2.3.5 Logging ___________________________________________________________________ 2-12 Environmental Management Programme Report for the Development of the Kudu gas field on the continental shelf of southern Namibia Part A, Section 1, page iii ENERGY AFRICA KUDU LIMITED 2.3.6 Testing____________________________________________________________________ 2-12 2.4 PRODUCTION FACILITIES _____________________________________2-12 2.5 SUBMARINE PIPELINE ________________________________________2-14 2.5.1 Introduction ________________________________________________________________ 2-14 2.5.2 Laying of the Pipeline ________________________________________________________ 2-14 2.5.3 Monoethylene Glycol (MEG Piggy Back line) ______________________________________ 2-17 2.6 CONTROL UMBILICALS _______________________________________2-17 2.7 PIPELINE LANDFALL _________________________________________2-18 2.8 ONSHORE PIPELINE __________________________________________2-18 2.9 ONSHORE GAS CONDITIONING PLANT __________________________2-20 2.10 SUPPLY BASE _______________________________________________2-22 2.11 PRODUCTION OPERATIONS ___________________________________2-22 2.11.1 Introduction ________________________________________________________________ 2-22 2.11.2 Production Wells and Subsea Production System __________________________________ 2-22 2.11.3 Pipeline ___________________________________________________________________ 2-24 2.11.4 Onshore Gas Conditioning Plant _______________________________________________ 2-24 2.11.5 Non-routine operations _______________________________________________________ 2-27 2.12 DECOMMISSIONING __________________________________________2-28 SECTION 3: DESCRIPTION OF THE ENVIRONMENT 3. DESCRIPTION OF THE ENVIRONMENT____________________________ 3.1 3.1 MARINE ENVIRONMENT ________________________________________ 3.1 3.1.1 Meteorology ________________________________________________________________ 3.1 3.1.1.1 Offshore wind and atmospheric conditions _______________________________________ 3.1 3.1.1.2 Nearshore wind and atmospheric conditions______________________________________ 3.1 3.1.1.3 Fog______________________________________________________________________ 3.6 3.1.2 Physical and Biological Oceanography____________________________________________ 3.6 3.1.2.1 Waves ___________________________________________________________________ 3.6 3.1.2.2 Tides ___________________________________________________________________ 3.10 3.1.2.3 Topography and Sediments__________________________________________________ 3.10 3.1.2.4 Water masses and temperature/salinity relationships ______________________________ 3.12 3.1.2.5 Water circulation __________________________________________________________ 3.13 3.1.2.6 Upwelling ________________________________________________________________ 3.13 3.1.2.7 Nutrient and Oxygen Distributions_____________________________________________ 3.13 3.1.2.8 Plankton_________________________________________________________________ 3.17 3.1.2.9 Benthos _________________________________________________________________ 3-19 3.1.2.10 Fishes __________________________________________________________________ 3-19 3.1.2.11 Birds____________________________________________________________________ 3-21 3.1.2.12 Cetaceans _______________________________________________________________ 3-27 3.1.2.13 Seals ___________________________________________________________________ 3-31 3.1.3 Commercial Fisheries ________________________________________________________ 3-32 3.1.3.1 The distribution and abundance of Hake off southern Namibia_______________________ 3-35 3.1.3.2 Monkfish ________________________________________________________________ 3-41 3.1.3.3 The Namibian Tuna Fishery _________________________________________________ 3-41 3.1.3.4 Pelagic species (clupeoids and mackerels)______________________________________ 3-42 Environmental Management Programme Report for the Development of the Kudu gas field on the continental shelf of southern Namibia Part A, Section 1, page iv ENERGY AFRICA KUDU LIMITED 3.1.3.5 Fishing Activities __________________________________________________________ 3-44 3.1.4 Conservation Areas__________________________________________________________ 3-54 3.1.5 Shipping and Navigation ______________________________________________________ 3-54 3.2 REFERENCES _______________________________________________3-57 SECTION 4: LEGISLATION AND LEGAL OBLIGATIONS 4. LEGISLATION AND LEGAL OBLIGATIONS_________________________4-1 4.1 NAMIBIAN ENVIRONMENTAL LEGISLATION _______________________4-1 4.1.1 Constitution of the Republic of Namibia, 1990 ______________________________________ 4-1 4.1.2 The Petroleum (Exploration and Production) Act, No. 2 of 1991 ________________________ 4-1 4.1.3 Namibia’s Environmental Assessment Policy (1995) _________________________________ 4-2 4.1.4 Draft Environmental Management Act Bill _________________________________________ 4-3 4.1.5 Territorial Sea and Exclusive Economic Zone of Namibia (Act 3 of 1990, amended by Act 30 of 1991) ______________________________________________________________________ 4-3 4.1.6 Prevention and Combatting of Pollution of the Sea by Oil Act 1981 and the 1991 Amendment Act (Act No 24) _________________________________________________________________