Chevron secured retention lease WA-83-R, 482 sq km S. of the Scarborough field in the Investigator sub-basin, N. Carnarvon Basin, on 12 Oct â17 for 5 years. It surrounds the 2012 Pinhoe gas discovery in WA-383-P which was correspondingly reduced prior to expiry next May. Chevron (op) 50%, Shell 50%. 
Chevron (50%, Shell 50%) was awarded WA-83-R retention lease (482kmÂ²).