text: **mmbbls**
  Million barrels. 
  
  **contingent resources**
  Those quantities of hydrocarbons which are 
  estimated, on a given date, to be potentially 
  recoverable from known accumulations, but 
  which are not currently considered to be 
  commercially recoverable. Contingent resources 
  may be of a significant size, but still have 
  constraints to development. These constraints, 
  preventing the booking of reserves, may relate 
  to lack of gas marketing arrangements or to 
  technical, environmental or political barriers. 
  
  **mmboe**
  Million barrels of oil equivalent. 
  
  **mmscf/d**
  Million standard cubic feet per day. 
  
  **petroleum liquids**
  Crude oil, condensate, or its derivative 
  naphtha, and the liquefied petroleum gases 
  propane and butane. 
  
  **the Company**or**Santos**
  Santos Ltd and its subsidiaries. 
  
  **DD&A**
  Depreciation, depletion and amortisation of 
  building, plant and equipment, exploration 
  and development expenditure. 