DOCSLIB.ORG

Cooper Basin Ridges — Are They Structural?

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Cooper Basin Ridges — Are They Structural? Petroleum Cooper Basin ridges — are they structural? Rodney Boucher (Linex Pty Ltd) Introduction their origin. In the following decades, doming of sediments on pre-existing Hydrocarbon-bearing ridges of the unsubstantiated maps and sections ridges in the Cooper Basin is Cooper Basin are traditionally assumed showing extensional faults were often commonplace (e.g. Stuart, 1976). Thus, to be structural. For three decades, printed in the literature. Heath (1989) isopachs will display thickness changes, published maps and sections have pronounced it was widely accepted that regardless of any later structural portrayed various unsubstantiated Cooper Basin ridges were dominantly modification. The compactional doming structures on the assumption that extensional. Yet throughout this time process will result in closure on depth topographic expression must have there had been very little published structure maps imprinted above existing evolved from structural movements. scientific evidence to support these basement ridges which might also be There has been no consensus and claims. misinterpreted as tilting. Care needs to structures have been variously Earlier, Sprigg (1958) and Wopfner be taken when relating onlap and considered to be extensional, compress- (1960) suggested that surface topo- compactional doming to structural ional and strike-slip faults or folds. graphic features represented ancient, movements. Though structural modification of many reactivated transcurrent faults within the An additional factor that has resulted ridges is common, new evidence and basement. Winsor (1984) indicated that in the over-interpretation of structural interpretations indicate that geomorphic compressional tectonics occurred in the features arises from the misuse of processes played a significant role in Cooper Basin area, and Kuang (1985) vertical exaggeration. There has been a shaping the basin. proposed that extensional, compress- tendency to exaggerate the vertical scale ional and strike-slip faults evolved from on geological cross-sections or to Features of Cooper regional simple shearing. When authors compress the horizontal scale on seismic Basin ridges began looking for structures beneath the until they suitably show notable relief. Basement to the Cooper Basin is Z horizon, elaboration on these themes Gross vertical exaggeration, commonly considered to be all pre-Permian evolved. For example, Carroll (1990), up to 50:1, contributes to the mis- sediments, metasediments and igneous Apak (1994) and Sun (1996) show conception that significant relief is rocks. The interface is mapped various compressional, extensional and commonplace. It is therefore easy to be seismically as the Z horizon. Ridges are strike-slip interpretations. misled into believing these features must basement features that are replicated Additional structural alternatives be structural. through the overlying Cooper and have been proposed. Mancktelow (1979) Eromanga Basins. Faults are rarely suggested that cross-folding produced An alternative imaged to penetrate through the the domes and basins within the Cooper geomorphic model Z horizon and into the Cooper Basin on Basin. Battersby (1976) and Stuart The discovery of an altered zone at the seismic. The most obvious fault extend- (1976) described the main ridges as a top of basement (Boucher, 1996) ing into the basin is the Big Lake Fault, series of anticlines. removed the requirement for an which displaces <10% of the total unconformity in the Moomba Field. post-Carboniferous stratigraphic section. Evidence supporting structural movements Previously, the altered zone was inter- Due to the economic significance of preted as Tirrawarra Sandstone (and the Cooper Basin and the difficulties There is good evidence to show that conglomerate) that was uplifted and imaging intra-basement reflectors on structural movements do occur. eroded prior to deposition of the seismic, very little work has been done Merrimelia Formation sediments at Patchawarra Formation. A revised interpreting the structures beneath the Gidgealpa, Merrimelia and Packsaddle interpretation is that Patchawarra Z horizon. Instead, basement structures are uplifted relative to younger Formation sediments onlap the granitic have traditionally been interpolated from Patchawarra Formation sediments Moomba palaeohigh. Previously, Permian and later depositional patterns adjacent to the ridges. The Big Lake Boucher (1994) proposed the complex and structures. This analysis has given Fault has demonstrably offset the Early ridge at Kobari might actually be a rise to multiple and possibly misleading Permian sediments, and Permian Cambrian volcanic palaeohigh rather interpretations. sediments have been eroded from ridges than a structural ridge. The basal glacial at Gidgealpa and Murteree. However, and fluvioglacial sediments of the Previous work care must be taken elsewhere when Cooper Basin would indicate that the Kapel (1972) published a schematic assuming erosional truncation is landscape was modified by glacial sketch portraying subsidence in the evidence for uplift because this is not activity. Glacial processes would northern Cooper Basin along extensional necessarily always the case. provide dramatic topographic relief at faults. These are not described in the text It is unanimously agreed in the what would later become the top of and no evidence was provided to explain literature that onlap and compactional basement unconformity. 30 MESA Journal 21 April 2001 Petroleum Onlap and compactional doming occurs at all ridges. The difficult task is Mount Buffalo area to separate structurally evolving ridges from palaeohighs. It is interesting to compare the size of the ridges in the Cooper Basin with palaeohighs from elsewhere to assist to determine which ridges could realistically be palaeohighs. Comparisons with Mount Woodroffe and Mount Buffalo Mount Woodroffe, the highest mountain in SA at 1440 m, rises 750 m above the surrounding landscape. Less than 10 ridges in the Cooper Basin Z horizon have a larger amplitude. In comparison, Mount Buffalo in eastern Victoria is larger in amplitude and area than most of the Cooper Basin ridges (Table 1). Only the Innamincka, Pondrinie–Packsaddle, Murteree and Gidgealpa ridges are larger in these respects. Of these, Gidgealpa is similar in geometry to Mount Buffalo (Fig. 1). Mount Buffalo is a residual palaeohigh resulting from differential 0 10 erosion of the resistant granite (O’Sullivan et al., 2000). The similar kilometres geometry of Mount Buffalo indicates that a ridge of this size does not require a structural origin. Though at Gidgealpa, Gidgealpa Ridge area thrust-repeated lithologies in the basement (Daily, 1964; Carroll, 1990; Sun 1996) and uplifted and erosionally truncated Early Permian sediments indicate that the Gidgealpa dome has been subjected to structural activity. Elsewhere in the Cooper Basin area the Z Table 1 Relative sizes of the largest Cooper Basin ridges compared to Mount Buffalo. Amplitude Area (m) (km2) Della 1800 96 Innamincka 1500 600 Gidgealpa 1400 162 Nappacoongee 1350 40 Murteree 1300 490 Pondrinie–Packsaddle 1300 280 Merrimelia 1200 90 Big Lake 750 34 Coobowie 750 180 Moomba 700 418 Warra 700 126 Toolachee 450 198 Daralingie 400 72 Coonatie 350 24 Strzelecki 350 30 0 10 Dullingari 250 48 kilometres Munkarie 200 15 200670-005 Tirrawarra 150 56 Mt Buffalo (Victoria) 1200 154 Fig. 1 Z horizon depth structure map of Gidgealpa and DTM of Mount Buffalo, Victoria. MESA Journal 21 April 2001 31 Petroleum horizon landscape was produced in the References Kapel, A.J., 1972. The geology of the Late Carboniferous and Early Permian Patchawarra area, Cooper Basin. APEA by glacial activity. It is not unreasonable Apak, S.N., 1994. Structural development Journal, 6:71-75. to expect that many of the apparent and control on stratigraphy and sedimentation in the Cooper Basin, Kuang, K.S., 1985. History and style of structures in the Cooper Basin are Australia. University of Adelaide. Cooper–Eromanga Basin structures. palaeohighs followed by onlap and National Centre for Petroleum Geology Exploration Geophysics, 16:245-248. compactional doming of Cooper and and Geophysics. Ph.D. thesis Mancktelow, N.S., 1979. Structure and Eromanga Basin sediments. (unpublished). tectonics of the Cooper Basin. Delhi Petroleum report (unpublished). Conclusion Battersby, D.G., 1976. Cooper Basin gas and oil fields. In: Leslie, R.B., Evans, H.J. O’Sullivan, P.B., Belton, D.X. and Orr, M., Despite decades of research, the origin of and Knight, C.L. (Eds), Economic 2000. Post-orogenic thermotectonic the Cooper Basin ridges remains geology of Australia and Papua New history of the Mount Buffalo region, uncertain and new ideas continue to Guinea, 3, Petroleum. Australasian Lachlan Fold Belt, Australia: evidence emerge. As a result of this uncertainty, Institute of Mining and Metallurgy. for Mesozoic to Cenozoic wrench-fault numerous models have been evoked, Monograph Series, 7:321-368. reactivation. Tectonophysics, 317:1-26. describing the structures variously as Sprigg, R.C., 1958. Petroleum prospects of extensional, compressional or strike-slip Boucher, R.K., 1994. Igneous associations in the eastern Warburton Basin. In: 12th the western parts of the Great Australian faults or from folding. However, much Artesian Basin. AAPG Bulletin, of the basement topography is glacial Australian Geological Convention, Perth, 1994. Geological Society of Australia. 42(10):2465-2491. rather than structural. It is geometrically Abstracts, 37:40.
Load more

Recommended publications
  • Hydrodynamics in the Queensland Sector of The
    SPE 64281 Hydrodynamics in the Queensland Sector of the Cooper/Eromanga Basins: Identifying Non-Conventional Exploration Plays Using Water Pressure and Chemistry Data Webster M.A.*, Brew J., Grimison A.G.* * Santos Ltd. Copyright 2000, Society of Petroleum Engineers Inc. As exploration programmes in these basins mature and reserve This paper was prepared for presentation at the SPE Asia Pacific Oil and Gas Conference and additions from conventional plays reach a plateau, Exhibition held in Brisbane, Australia, 16–18 October 2000. complementary or alternative techniques are required to This paper was selected for presentation by an SPE Program Committee following review of identify new exploration plays and non-conventional traps and information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the Society of Petroleum Engineers and are subject to to provide insights into the petroleum systems operating correction by the author(s). The material, as presented, does not necessarily reflect any position of the Society of Petroleum Engineers, its officers, or members. Papers presented at within these basins. Hydrodynamics is one such technique by SPE meetings are subject to publication review by Editorial Committees of the Society of which water pressure and chemistry data can be used to Petroleum Engineers. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of the Society of Petroleum Engineers is identify flow barriers, which may reflect hydrocarbon traps, prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied.
    [Show full text]
  • Hydrocarbon Prospectivity of the Cooper Basin, Australia
    Hydrocarbon prospectivity of the AUTHORS Cooper Basin, Australia Lisa S. Hall ~ Geoscience Australia, Symonston, Australian Capital Territory, Australia; [email protected] Lisa S. Hall, Tehani J. Palu, Andrew P. Murray, Lisa Hall is a senior research scientist at Christopher J. Boreham, Dianne S. Edwards, Geoscience Australia. She holds an M.Sc. in Anthony J. Hill, and Alison Troup geology and geophysics from Cambridge University and a D.Phil. in structural geology and neotectonics from Oxford University. Her current research is focused on hydrocarbon ABSTRACT prospectivity assessments and petroleum The Pennsylvanian–Middle Triassic Cooper Basin is Australia’s systems analysis in a variety of Australian premier conventional onshore hydrocarbon-producing prov- basins. ince. The basin also hosts a range of unconventional gas play Tehani J. Palu ~ Geoscience Australia, types, including basin-centered gas and tight gas accumula- Symonston, Australian Capital Territory, tions, deep dry coal gas associated with the Patchawarra and Australia; [email protected] Toolachee Formations, and the Murteree and Roseneath shale Tehani Palu is a geoscientist at Geoscience gas plays. Australia. She holds an M.Sc. from the This study used petroleum systems analysis to investigate University of Waikato. She has been involved the maturity and generation potential of 10 Permian source with various projects including greenhouse rocks in the Cooper Basin. A deterministic petroleum systems gas monitoring for carbon capture, and model was used to quantify the volume of expelled and retained storage and petroleum acreage release. Tehani has been in her current role since hydrocarbons, estimated at 1272 billion BOE (512 billion bbl 2013 which sees her undertaking petroleum and 760 billion BOE) and 977 billion BOE (362 billion bbl systems analysis within Australian basins.
    [Show full text]
  • Cooper Basin Unconventional Gas Opportunities And
    Insert picture Eastern Australia Business Unit Cooper Basin Unconventional Gas Opportunities & Commercialisation November 2012 Disclaimer & important notice This presentation contains forward looking statements that are subject to risk factors associated with the oil and gas industry. It is believed that the expectations reflected in these statements are reasonable, but they may be affected by a range of variables which could cause actual results or trends to differ materially, including but not limited to: price fluctuations, actual demand, currency fluctuations, geotechnical factors, drilling and production results, gas commercialisation, development progress, operating results, engineering estimates, reserve estimates, loss of market, industry competition, environmental risks, physical risks, legislative, fiscal and regulatory developments, economic and financial markets conditions in various countries, approvals and cost estimates. All references to dollars, cents or $ in this document are to Australian currency, unless otherwise stated. 2 Agenda 1. The East Coast gas market 2. Application of US shale gas learnings to the Cooper Basin 3. Santos’ technical and commercial advantages 4. The plan to commercialise Cooper Basin unconventional gas 3 Unprecedented growth in Eastern Australia gas market Demand growth from LNG and power generation is increasing gas prices… Eastern Australia gas demand Eastern Australia gas supply costs (ex-field)1 3 fold demand growth from today PJ/a $/GJ 3,500 $16 3,000 $14 Proposed Contracted Uncontracted
    [Show full text]
  • Geology and Mineral Resources of the Northern Territory
    Geology and mineral resources of the Northern Territory Ahmad M and Munson TJ (compilers) Northern Territory Geological Survey Special Publication 5 Chapter 41: Eromanga Basin BIBLIOGRAPHIC REFERENCE: Munson TJ, 2013. Chapter 41: Eromanga Basin: in Ahmad M and Munson TJ (compilers). ‘Geology and mineral resources of the Northern Territory’. Northern Territory Geological Survey, Special Publication 5. Disclaimer While all care has been taken to ensure that information contained in this publication is true and correct at the time of publication, changes in circumstances after the time of publication may impact on the accuracy of its information. The Northern Territory of Australia gives no warranty or assurance, and makes no representation as to the accuracy of any information or advice contained in this publication, or that it is suitable for your intended use. You should not rely upon information in this publication for the purpose of making any serious business or investment decisions without obtaining independent and/or professional advice in relation to your particular situation. The Northern Territory of Australia disclaims any liability or responsibility or duty of care towards any person for loss or damage caused by any use of, or reliance on the information contained in this publication. Eromanga Basin Current as of May 2012 Chapter 41: EROMANGA BASIN TJ Munson INTRODUCTION geology and regolith). However, the southwestern margins of the basin are exposed in SA and the northeastern part of The ௘Cambrian±"Devonian Warburton Basin, the basin in central Qld is also exposed and has been eroding Carboniferous±Triassic 3edirNa Basin and Jurassic± since the Late Cretaceous.
    [Show full text]
  • 2020 Sustainability Performance Report
    Sustainability Performance Report Contents 3 Sustainability at Santos 4 Highlights 6 Climate Change 8 Community 12 Economic Sustainability 15 Environment 18 Health and Safety 22 Indigenous Partnerships 26 People and Culture 30 Sustainability Data 2019 Sustainability at Santos For 65 years, Santos, a proudly Australian company, has been safely and sustainably exploring and developing oil and natural gas resources in partnership with local communities, landholders and marine users to supply reliable, affordable and cleaner energy essential to improve the lives of people in KEVIN GALLAGHER, CEO SANTOS Australia and Asia. At Santos, we are committed to capitalising on the benefits of natural gas as a key enabler of a lower-carbon future. Our seven sustainability pillars provide a framework to ensure we are doing this in a way that delivers on our environmental, economic and social commitments. We have developed aspirational targets and supporting activities under each of our sustainability pillars so that we can play our part in creating a more sustainable future. 3 Highlights In 2018, Santos Over $28 million over Since 2011 we have created contributed last 5 years invested in over 800 employment AUD$268 million community initiatives and and training opportunities in Australian taxes sponsorships for Indigenous Australians and royalties Santos’ emissions Total recordable injuries In 2019, 235 people intensity has have reduced employed in communities decreased by 17% by 53% between where we operate in the past 5 years 2013 to 2019 43 graduates recruited Invested more than 100% of water over the last three US$16 billion in after treatment years, with female intake Australian capital in Eastern Queensland increasing from 33% to development is beneficially reused almost half in 2020 projects since 2011 Responsibility for delivering on our sustainability commitments is overseen by the Environment, Health, Safety and Sustainability Committee of the Santos Board.
    [Show full text]
  • 2020 Annual Report, but Does Not Include the Financial Report and Our Auditor’S Report Thereon
    Annual Report 2020 A clear pathway to net zero emissions by 2040 Santos Limited ABN 80 007 550 923 This Annual Report 2020 is a summary of Santos’ operations, activities and financial position as at 31 December 2020. All references to dollars, cents or $ in this document are to US currency, unless otherwise stated. An electronic version of this report is available on Santos’ website, www.santos.com Santos’ Corporate Governance Statement can be viewed at: www.santos.com/about-us/corporate-governance CONTENTS 1 About Santos 2 Financial Overview 4 Message from the Chairman and from the Managing Director and Chief Executive Officer 6 Board of Directors 9 Santos Leadership Team 12 Reserves Statement 16 Directors’ Report 31 Remuneration Report 59 Financial Report 133 Directors’ Declaration 134 Independent Auditor’s Report 140 Auditor’s Independence Declaration 141 Securities Exchange and Shareholder Information 143 Glossary 144 Corporate Directory Cover image: Santos has a number of natural advantages to deliver carbon capture and storage at scale and zero-emissions hydrogen from our position in the Cooper Basin. About Santos An Australian energy pioneer A proudly Australian company, Santos is a leading supplier of natural gas, a fuel for the future, providing clean energy to improve the lives of people in Australia and Asia. Santos is already Australia’s biggest domestic gas supplier, a leading Asia–Pacific LNG supplier and aims to be a world-leading clean fuels company, achieving net zero emissions by 2040. Santos will grow its clean fuels capability as customer demand evolves for zero-emissions LNG, hydrogen and other products through carbon capture and storage, nature-based offsets, energy efficiency and use of renewables in its operations.
    [Show full text]
  • Cooper Basin Oil Plays Oil Play Trend • Western Flank Oil Play Trend- More Recent Discoveries • Structural and Structure
    Setting the Scene • The long-term outlook remains very positive for SA’s minerals and petroleum sectors – SA has a rich mineral and petroleum resource endowment and long-life resources. • SA offers a supportive investment framework, trusted regulation, infrastructure and easy access to data. SA Oil and gas production Impact of low oil price. Exploration increasing now. US$51/bbl on 8 Feb Cooper Basin Flooding event US$19 to 26 per bbl oil lifting cost range Cooper Basin Pedirka Basin Eromanga Basin State of play for oil & gas in SA Cooper • SA and Qld Cooper‐Eromanga remains Moomba • Officer Basin Arckaringa Australia’s largest onshore oil and gas producer Basin Basin • Huge potential for gas in Cooper Basin unconventional reservoirs, including the world’s Olympic Arrowie Dam Mine Basin deepest gas from coal source rocks • Work program bidding in Cooper & Otway. • Over‐the‐counter applications elsewhere ‐ anytime. Polda Basin Bight Adelaide Basin Oil & Gas licences: Exploration Exploration - application Production Selected mine Otway Retention Basin ILUA Pipelines: 124 miles Gas No access parks Gas & liquids Oil Cooper Basin acreage Acreage PositionCooper Basin vacant‐Number acreage is Acres subject to work program bidding: o 5 year work program – scoring method published, o Evidence of financial and technical capacity. Petroleum tenements Pipeline Oil Gas Exploration Gas and liquids Exploration application Discoveries 2002–16 Production Oil Retention Gas Resource play Cooper Basin Oil plays Oil play trend • Western flank oil play trend- more recent discoveries • Structural and structure- stratigraphic traps, excellent Kangaroo 1 sandstone reservoirs. oil discovery • ~ 50% success finding Nov 2016 average 2.5 mmbo Companies in the SA Cooper Basin recoverable.
    [Show full text]
  • Channel Country
    CHANNEL COUNTRY AT THE CROSSROADS The Risks of Unconventional Gas Mining for Land, Water and Life ISBN: 978-1-68419-085-0 Western Rivers Alliance acknowledges the Traditional Owners of Lake Eyre Basin. This report is copyright to the Western Rivers Alliance, September 2016. Cover photo credit: Helen Kidd CONTENTS FOREWORD .................................................................................................................................................................... 4 Conventional oil and gas mining in the Channel Country ................................................................ 5 Unconventional gas mining in the Channel Country .......................................................................... 7 About this Report ........................................................................................................................................... 9 Introduction ................................................................................................................................................... 10 About the Western Rivers Alliance ........................................................................................................ ..11 AUSTRALIA’S UNCONVENTIONAL GAS INDUSTRY .......................................................................................... 12 Unconventional gas mining in the Cooper Basin ............................................................................... 14 THE LAKE EYRE BASIN AND THE CHANNEL COUNTRY Lake Eyre Basin ............................................................................................................................................
    [Show full text]
  • Australia's Next Energy Advantage Natural
    NaturalNatural Gas:Gas: Australia’sAustralia’s nextnext energyenergy advantageadvantage AddressAddress toto thethe AustralianAustralian InstituteInstitute ofof EnergyEnergy DavidDavid Knox,Knox, ChiefChief Executive,Executive, SantosSantos Adelaide, 10 June 2010 1 Thanks Graeme (Bethune, SA Chairman of AIE), ladies and gentlemen … I’d like to talk today about the role natural gas can play in generating jobs, investment and public revenues, and giving us a cleaner energy mix. In particular, I’ll look at the role that Santos can play in delivering the benefits of natural gas to all Australians and the energy‐hungry markets of Asia. In recent times, we at Santos have been extolling Australia’s AAA advantage in natural gas. It is abundant, affordable and available. It is important to remember that the benefits of natural gas –and the certainty of the investment and jobs planned for our sector –cannot be taken for granted. But with the right policy settings in place, Australian natural gas will deliver environmental, economic and energy benefits for decades, if not centuries, to come. 1 Australian gas: Abundant and available LNG Export (2.2 Tcf in 2020) Bonaparte Basin Browse Basin Gas reserves and resources Eromanga Carnarvon Basin 213 Tcf Basin plus CSG resource potential Surat/Bowen + 250Tcf Amadeus Cooper Basin Basins Basin (SA & Qld) Gunnedah Basin Domestic market (1.8 Tcf in 2020) Gippsland Basin Otway Basin Sources: Wood Mackenzie, Energy Quest, CSIRO, APPEA 2 2020 domestic gas consumption and LNG exports forecasts by ABARE ABARE forecasts that in 2020 Australia will produce 4 trillion cubic feet of gas –roughly split between LNG for export and gas for the domestic market.
    [Show full text]
  • ENVIRONMENTAL IMPACT REPORT Petroleum Exploration Activities in the Simpson and Pedirka Regions
    ENVIRONMENTAL IMPACT REPORT Petroleum Exploration Activities in the Simpson and Pedirka Regions DRAFT May 2020 Tri-Star Energy Company Environmental Impact Report – Petroleum Exploration Activities in the Simpson and Pedirka Regions Prepared by: Tri-Star Energy Company Level 35 Riverside Centre 123 Eagle Street Brisbane, Q 4000 T: (07) 3236 9800 F: (07) 3221 2146 E: [email protected] W: http://www.tri-starpetroleum.com.au and JBS&G Australia Pty Ltd ABN 62 100 220 479 100 Hutt St Adelaide SA 5000 T: +61 8 8431 7113 F: +61 8 8431 7115 W: http://www.jbsg.com.au Document Status Review Release Version Purpose of Document Original Review QA Review Issue Date Date Approval A Draft for Tri-Star review / discussion RS/AM/AC AC/SM 6/4/2019 SM SM 16/4/2019 Updated draft following Tri-Star B input. Issued for preliminary DC AC/SM 9/8/2019 SM SM 9/8/2019 government agency consultation Updated based on DEW, DPTI and 0 AC DC/AC 8/3/2020 CB/RU/SH JB 28/5/2020 SAAL NRM Board initial comments Tristar Drilling EIR Rev0 Tri-Star Energy Company Environmental Impact Report – Petroleum Exploration Activities in the Simpson and Pedirka Regions Contents 1 Introduction ....................................................................................................... 1 1.1 About this Document .................................................................................. 1 1.2 Tri-Star Energy Company Profile ................................................................. 1 1.3 Location and Exploration Rationale ...........................................................
    [Show full text]
  • Santos Ltd Santos Ltd ABN 80 007 550 923
    Central Australia Business Unit Santos Ltd Santos Ltd ABN 80 007 550 923 ANNUAL REPORT FOR SA COOPER BASIN JOINT VENTURE OPERATIONS REPORT TO: DEPARTMENT OF PRIMARY INDUSTRIES AND RESOURCES, SA. JULY 2002 UPDATE FOR REPORTING PERIOD: 1st July 2000 – 31st December 2001 Central Australia Business Unit Santos Ltd PREFACE This Annual Report for SA Cooper Basin Joint Venture Operations has been prepared in accordance with Regulation 33, Part 7: Division 2 – Performance and Technical Reports under the SA Petroleum Act, 2000. This Report also fulfils the requirements detailed under Alternative Arrangement 4 as described in correspondence from the Director of the Petroleum Division within PIRSA on 8th June 2000 (Ref No. SR28/1/3). This letter granted Santos Ltd. approval to undertake its South Australian Cooper and Eromanga Basin operations subject to complying with the six stated alternative operating arrangements. This report provides details of Santos activities undertaken within exploration and production tenements in the Cooper and Eromanga Basins in South Australia, herein referred to as the Operational Area. This report is presented in 6 parts: Part 1: Seismic Exploration Activities Part 2: Well Site Activities Part 3: Flowline, Pipeline and Trunkline Activities Part 4: Production Operations Part 5: Statement of Expenditure Part 6: References & Appendices Part 6 includes a list of reports and data relevant to the operation of the Act generated by the licensee during the relevant license year. Previous reporting of operational activities has been completed through the provision of separate activity reports to PIRSA. To enable subsequent reports to be aligned with the calendar year, the reporting period for Parts 2, 3 and 4 and 6 extends from 1st July 2000 to 31st December 2001.
    [Show full text]
  • 2020 Fourth Quarter Report
    Fourth Quarter Report For period ending 31 December 2020 ASX: STO | ADR: SSLZY 21 January 2021 Record annual production at top end of upgraded guidance • Record annual production of 89 mmboe, 18% above the prior year and at the top end of upgraded guidance provided in December • Record quarterly production of 25.4 mmboe, 1% above the prior quarter • Record quarterly sales volumes of 31.1 mmboe, 7% above the prior quarter • Record annual sales volumes of 107.1 mmboe generated annual sales revenue of US$3.4 billion • Fourth quarter sales revenue of US$922 million, up 16%, primarily due to stronger LNG sales volumes (up 23%) and prices (up 25%) • Santos’ disciplined operating model continues to drive costs lower, with 2020 upstream unit production costs of ~US$8/boe at the lower end of the US$8.00-8.50/boe guidance range Strong free cash flow and low breakeven oil price • Santos generated over US$725 million in free cash flow in 2020 despite lower commodity prices • Delivered 2020 free cash flow breakeven oil price of less than US$25 per barrel (before hedging) and less than US$20 per barrel (after hedging) • Net debt at the end of the year (including leases) was US$3.7 billion Growth project milestones achieved • Significant milestones were achieved on the Barossa LNG project during the fourth quarter, including execution of a long-term LNG offtake agreement with Mitsubishi for 1.5 mtpa of Santos equity LNG, execution of agreements to transport and process Barossa gas through Darwin LNG, and regulator and joint venture consents for the sell-down of interests in Bayu-Undan and Darwin LNG • Moomba CCS project is FID-ready, subject to eligibility for Australian Carbon Credit Units • Work continues on the pre-FEED phase for the Dorado project, with FEED entry planned for the first half of 2021 for the Phase 1 oil project.
    [Show full text]