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Annual Report 2005 (6 MB) - Lundin Petroleum

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UNDERSTANDING RESERVES AND RESOURCES<br />

Resource Classifi cation System<br />

Proved<br />

PRODUCTION<br />

RESERVES<br />

Proved &<br />

Probable<br />

CONTINGENT<br />

RESOURCES<br />

PROSPECTIVE<br />

RESOURCES<br />

Proved, Prob.<br />

& Possible<br />

Commercial<br />

Discovered but not<br />

currently commercial<br />

Exploration prospectivity<br />

> 6 <<br />

Reserves<br />

<strong>Lundin</strong> <strong>Petroleum</strong>, like most companies in Europe, calculates<br />

reserves and resources according to the SPE/WPC defi nition<br />

of petroleum resources. This defi nition was fi rst published<br />

in 1997 by the SPE (Society of <strong>Petroleum</strong> Engineers) and<br />

WPC (World <strong>Petroleum</strong> Congress) in an eff ort to standardise<br />

reserves reporting.<br />

Reserves are defi ned as those quantities of petroleum which<br />

are anticipated to be commercially recovered from known<br />

accumulations from a given date forward. Estimation of<br />

reserves is inherently uncertain and to express an uncertainty<br />

range, reserves are subdivided in Proved, Probable and<br />

Possible categories. <strong>Lundin</strong> <strong>Petroleum</strong> reports its reserves as<br />

Proved plus Probable reserves, also abbreviated as 2P.<br />

<strong>Lundin</strong> <strong>Petroleum</strong>’s reserves are calculated using forward<br />

projections of production levels, work programmes and<br />

the associated capital investment, and operating cost<br />

levels. From these projections the last year of economic<br />

production is calculated, given an assumed oil price scenario.<br />

The aggregate production until this economic cut off point<br />

constitutes the reserves. This year <strong>Lundin</strong> <strong>Petroleum</strong> has<br />

used a long term oil price scenario of USD 35 per barrel for<br />

this calculation.<br />

Each year <strong>Lundin</strong> <strong>Petroleum</strong>’s reserves base is certifi ed by<br />

an independent reserves certifi er. Over the last couple of<br />

years Gaff ney, Cline and Associates (GCA) has performed<br />

this service. GCA is one of the largest independent reserves<br />

certifi ers in the world and this year GCA certifi ed 146.1<br />

MMboe (million barrels of oil equivalent) of 2P oil and gas<br />

reserves net to <strong>Lundin</strong> <strong>Petroleum</strong>. This is an increase of<br />

12 percent compared to last year’s reserves and <strong>Lundin</strong><br />

<strong>Petroleum</strong> replaced last year’s production by 126 percent.<br />

Contingent resources<br />

In addition to its certifi ed reserves, <strong>Lundin</strong> <strong>Petroleum</strong> has a<br />

number of discovered oil and gas resources which currently<br />

do not classify as reserves. According to the SPE/WPC these<br />

classify as contingent resources. Contingent resources are<br />

those quantities of petroleum which are estimated, on<br />

a given date, to be potentially recoverable from known<br />

accumulations, but which are not currently considered to be<br />

commercially recoverable.<br />

<strong>Lundin</strong> <strong>Petroleum</strong> has an estimated 131 MMboe of contingent<br />

resources. These resources are not reserves, because further<br />

work is required to mature them. Additional work can be<br />

the drilling of a ‘productivity prover’ in the Heather Triassic,

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