173www.tullowoil.com5SUPPLEMENTARY INFORMATION Licence / Blocks Fields AreaTullow Operator EUROPE, SOUTH AMERICA & ASIA continued Netherlands E10 40132.00% TullowXTO, GTO, EBN E11 40130.00% TullowXTO, EBN E13a 23450.00% TullowEBN, Gas Plus E14 40332.00% TullowXTO, GTO, EBN E15a F16-E17 394.69% WintershallDana, GDF Suez, EBNE15b E18-A17 2121.12% WintershallDana, EBN E15c 34330.00% Tullow XTO, GTO, Gas Plus, EBN E18a E18-A17, F16-E17, K3-A17 21217.60% WintershallDana, GDF Suez, EBNE18b 19232.00% TullowXTO, GTO, EBN F13a F16-E17 44.69% WintershallDana, GDF Suez, EBNK8, K11 82022.50% NAMOranje Nassau, Wintershall, EBNL12a 11922.50% GDFSuezOranje Nassau, Wintershall, EBNL12b, L15b L12b-C, L15b-A 9215.00% GDFSuezWintershall, EBN L12c 3045.00% TullowEBN, Wintershall L12d 22552.50% TullowEBN, Wintershall L13 41322.50% NAMOranje Nassau L15d 6245.00% TullowEBN, Wintershall Q4 Q4-A, Q1-B17; Q4-B17 41719.80% WintershallDyas, EBN Q5d 2110.00% WintershallDyas, EBN Joint Development Area (JDA)18 K7, K8, K11, K14, K15, L13 Over 20 fields 9.95% NAMOranje Nassau, Wintershall, EBNSOUTH AMERICA French Guiana Guyane Maritime 24,10027.50% ShellTotal, Northpet Investments Guyana Georgetown Block 8,40030.00% Repsol YPF, CGX Resources Suriname Block 47 2,36970.00% TullowStatoil Coronie19 2,59240.00%20 Paradise Oil ASIA Bangladesh Block 9 Bangora1,77030.00% TullowNiko, Bapex Pakistan Bannu West 1,23040.00% TullowOGDCL, MGCL, SEL Block 28 6,20095.00% TullowOGDCL Kalchas 2,06830.00% OGDCL MGCL Kohat Shekhan1,10740.00% OGDCL MGCL, SEL Kohlu 2,45930.00% OGDCL MGCL Sara D&PL Sara21 8338.18% TullowOGDCL, POL, Attock Suri D&PL Suri21 2438.18% TullowOGDCL, POL, Attock Notes: 12 Refer to CMS III Unit for field interest. 13 Refer to Schooner Unit for field interest. 14 Refer to Munro Unit for field interest. 15 For the UK offshore area, fields that extend across more than one licence area with differing partner interests become part of a unitised area. The interest held in the Unitised Field Area is split amongst the holders of the relevant licences according to their proportional ownership of the field. The unitised areas in which Tullow is involved are listed in addition to the nominal licence holdings. 16 Refer to Gawain Unit for field interest 17 These fields are unitised - interests are as follows: F16-E 4.147%; E18-A 18.357%; K3-A 10.384%; Q4-B 17.105%; Q1-B 4.95%; 18 Interests in blocks K7, K8, K11, K14, K15 and L13 have been unitised. The six blocks are known as the Joint Development Area. 19 Tullow will acquire its interests on completion of work programme. 20 Tullow has a 40% title interest (36.5% economic interest). 21 Sara and Suri fields have been shut in. sq kminterestOther partners

174Tullow Oil plc 2011 Annual Report and AccountsShareholder information Shareholder enquiriesAll enquiries concerning shareholdings including notification of change of address, loss of a share certificate or dividend payments should be made to the Company's registrars, Computershare Investor Services PLC or, for shareholders whose shares are held on the Ghana branch register, enquires should be made to Computershare Pan Africa Limited. Contact details for both registrars are as follows:Computershare Investor Services PLC The Pavilions Bridgwater Road Bristol BS99 6ZZTelephone number - UK shareholders: 0870 703 6242 Telephone number - Irish shareholders: 00 353 1 216 3744 Telephone number - overseas shareholders: 00 44 870 703 6242Contact: www.investorcentre.co.uk/contactus Computershare Pan Africa Ghana LimitedP.O. Box CT2215 Cantonments 23 Eleventh Lane, Osu R.E.,Accra, Ghana Telephone number - Ghana shareholders: 00 233 302 770507 Contact: panafrica@computershare.co.zaA range of shareholder frequently asked questions and practical help on transferring shares and updating details is available online in the Shareholder Services section located in the Investors area of the Tullow website: www.tullowoil.com. Computershare online enquiry service Computershare provides a range of services through its online portal, Investor Centre, which can be accessed free of charge at www.investorcentre.co.uk. This service, accessible from anywhere in the world, enables shareholders to check details of their shareholdings or dividends, download forms to notify changes in personal details, and access other relevant information. Payment of dividends Shareholders can have their dividends paid directly into a UK sterling or Irish euro bank account and have the tax voucher sent directly to their registered address. You can register your account details in Investor Centre or, alternatively download a dividend mandate form.Overseas shareholders who wish to have their dividends paid in a local currency can use the Global Payments Service that Computershare has established. Details of the service can be accessed in the Shareholder Services section of the Investors area of the Tullow website: www.tullowoil.com. Holders on the Ghanaian Branch Register may also receive dividends directly into a bank account in Ghana. Such payments are only made in Ghanaian Cedis. Share dealing service A telephone share dealing service has been established for shareholders with Computershare for the sale and purchase of Tullow Oil shares. Shareholders who are interested in using this service can obtain further details by calling the appropriate telephone number below: UK shareholders: 0870 703 0084 Irish shareholders: 00 353 1 447 5435If you live outside the UK or Ireland and wish to trade you can do so through the Computershare Trading Account.To find out more or to open an account, please visit www.computershare-sharedealing.co.uk or phone Computershare on +44 (0) 870 707 1606.Electronic communication Shareholders have the option to receive shareholder communications including annual reports and notices of meetings electronically. Tullow actively supports Woodland Trust, the UK's leading woodland conservation charity. Computershare, together with Woodland Trust, has established eTree, an environmental programme designed to promote electronic shareholder communications. Under this programme, the Company makes a donation to eTree for every shareholder who registers for electronic communication. To register for this service, simply visit www.etreeuk.com/tullowoilplc with your shareholder number and email address to hand. Once registered, shareholders will be e-mailed when an annual report or notice of meeting is available for viewing on the Tullow website. Shareholder securityShareholders are advised to be cautious about any unsolicited financial advice; offers to buy shares at a discount or offers of free company reports. More detailed information can be found at www.moneymadeclear.fsa.gov.uk and in the Shareholder Services section of the Investors area of the Tullow website: www.tullowoil.com. ShareGiftIf you have a small number of shares whose value makes it uneconomical to sell you may wish to consider donating them to ShareGift. Any shares donated to ShareGift will be aggregated and sold when possible with the proceeds donated to a wide range of UK charities. The relevant share transfer form may be obtained from Computershare. Further information about the scheme is available at www.ShareGift.org. Financial calendar Financial year end 31 December 20112011 Full-year results announced 14 March 2012 Annual General Meeting 16 May 2012 Interim Management Statement 16 May 2012 2011 Final dividend payable 24 May 2012 2012 Half-yearly results announced 25 July 2012 2012 Interim dividend payable November 2012 Interim Management Statement November 2012