Total net to Oil Search as at 31 December 20191,2

Licence / Field Oil Search Interest
Total Oil and Condensate3
Total Gas4
Total Oil and Condensate3
Total Gas4

Proved (1P)

Proved & Probable (2P)
PDL 2 - Kutubu 60.0% 9.9 - 15.2  -
PDL 2/5/6 - Moran Unit 49.5% 6.0  - 9.5  -
PDL 4 - Gobe 10.0% 0.0 - 0.0  -
PDL 3/4 - SE Gobe5 22.3% -  -
PDL 1 – Hides GTE7 16.7% - 1.7   - 2.2
Oil fields and Hides GTE reserves 15.9  1.7 24.8 2.2
PNG LNG Project reserves6 29.0% 38.0  1,872.4 42.3  2,099.7
Subtotal developed reserves 53.9  1,874.1 67.1  2,101.9
Contingent resources8  1C2C
PNG LNG Project gas, oil and condensate - - 1.8 125.2 
Other PNG gas, oil and condensate9 - - 57.1  4509.8 
Alaska gas, oil and condensate10 - - 371.1  -
Subtotal resources - - 430.04,635.1
Total reserves and resources53.91,874.1497.06,737.0


(1) Numbers may not add due to rounding.
(2) Kutubu and Moran oil fields proved Reserves (1P) and proved and probable (2P) Reserves are as certified by independent auditor Netherland, Sewell & Associates, Inc. (NSAI) in 2017. 1P and 2P PNG LNG Project Reserves are based on Contingent Resources as certified in the 2019 draft report received from independent auditor, NSAI. Gobe Main and SE Gobe 1P and 2P Reserves are based on Oil Search 2019 technical estimates. All Reserves estimations use Oil Search’s corporate assumptions to calculate economic limit.
(3) Crude oil, and separator and plant condensates.
(4) For the PNG LNG Project, shrinkage has been applied to raw gas for the field condensate, plant liquids recovery, and fuel and flare.
(5) Although technical volumes remain accessible, SE Gobe is not expected to be cashflow positive from 2020 using current Oil Search corporate economic assumptions. All SE Gobe Reserves have been moved to Contingent Resources, contingent on a change in economic or commercial assumptions.
(6) PNG LNG Project Reserves comprise the Kutubu, Moran, Gobe Main, SE Hedinia, Hides, Angore and Juha fields. Minor volumes associated with proposed domestic gas sales have been included as part of PNG LNG reserves. In addition, third party wet gas sales to the project at the Gobe plant outlet (inclusive of plant condensate) have been included for SE Gobe in 1P and 2P Reserves at the post‑sales agreement field interest of 22.34%. SE Gobe estimates for gas are based on Oil Search 2019 technical estimates.
(7) Hides Reserves associated with the GTE Project under existing contract. Production volumes shown in this Reserves report are based on Oil Search’s entitlement in PDL 1 (16.67%).
(8) Contingent Resources are quantities of petroleum estimated to be potentially recoverable from known accumulations by application of development projects, but which are not currently considered to be commercially recoverable owing to one or more contingencies. There may be a chance that accumulations containing Contingent Resources will not achieve commercial maturity.
(9) Other gas, oil and condensate Resources comprise the Company’s other PNG fields including Elk‑Antelope, SE Mananda, Juha North, P’nyang, Kimu, Uramu, Barikewa, Iehi, Cobra, Mananda, Flinders and Muruk and may also include Resources beyond the current economic limit of producing oil and gas fields. These gas Resources may include fuel, flare and shrinkage depending on the choice of reference point.
(10) Alaskan gas, oil and condensate Resources comprise the Company’s share in Alaskan assets, incorporating the Nanushuk and satellite reservoirs in the Pikka Unit, as certified by Ryder Scott. 

This Reserves and Resources statement is based on, and fairly represents, information and supporting documentation that has been prepared by, or under the supervision of, one of the qualified petroleum reserves and resources evaluators listed in the table below. Dr J. Spilsbury‑Schakel, a full‑time employee of Oil Search Ltd. and qualified petroleum reserves and resources evaluator, has consented to publish this information in the form and context in which it is presented in this statement.


* The evaluation date for these estimates is 31 December 2019.
* Oil Search’s reserves and contingent resource estimates are prepared in accordance with the 2007 Petroleum Resources Management System (PRMS), sponsored by the Society of Petroleum Engineers (SPE).
* The following reference points are assumed:
- Oil volumes: include both oil and condensate recovered by lease processing. The reference point is at the outlet of the relevant process facility. Volumes are adjusted to stock-tank using field standard conditions.
- Hides GTE: the custody transfer point at the wellhead
- PNG LNG Project: the outlet to the LNG plant
- SE Gobe gas: the outlet to the Gobe facility
- Fuel, flare and shrinkage upstream of the reference points have been excluded.
* Reserves and contingent resources are aggregated by arithmetic summation by category and therefore proved reserves may be a conservative estimate due to the portfolio effects of arithmetic summation.
* Reserves and contingent resources have been estimated using both deterministic and probabilistic methods.