The Tubarão Martelo offshore field (formerly Waikiki) hosts BM-C-39 and BM-C-40 blocks in the Campos basin at 105m depth. It is operated by Brazilian oil company OGPar (60%), formerly known as OGX; the other partner in the field is Malaysian Petronas (40%). The 1-OGX-25-RJS well was drilled in 2010 within the Albiano-Cenomaniano section, where a 125m column with net pay of some 116m was found. Output potential was confirmed by the drilling of horizontal well OGX-9-44HP-RJS, which produces 40,000b/d. The field began commercial operations with the OGX-9-44 horizontal well, also known as Itacoatiara, which contains a 150m column and net pay of 64m. Probable gas reserves amount to 87.9Mboe and possible reserves stand at 109Mboe; production from the field began in December 2013 with the FPSO OSX-3.