A worker scrapes sands affected by oil spill as he cleans a beach at a shoreline in Karawang, West Java province, August 9, 2019. Clean-up efforts after an oil spill from a well in Indonesia's Java Sea will take until at least March next year, state energy firm Pertamina said on Thursday as it struggles to plug the underwater leak. REUTERS/Willy Kurniawan

Workers collect sand affected by oil spill at a shoreline in Karawang, West Java province, August 9, 2019. The spill started on July 12 when Pertamina was drilling at its YYA-1 well in the Offshore North West Java (ONWJ) block, about 2 km (1.2 miles) from the coastline in the Karawang district. REUTERS/Willy Kurniawan

A styrofoam cup is seen among sands affected by oil spill at a shoreline in Karawang, West Java province, August 9, 2019. Nearly 4,000 barrels of oil has been recovered from the sea since the spill, and 4,900 tonnes of polluted sand and rocks had been cleared from beaches. REUTERS/Willy Kurniawan

Workers scrape sands affected by oil spill at a shoreline in Karawang, West Java province, August 9, 2019. Pertamina has deployed 44 vessels to the area and oil booms to contain the offshore spill, as well as oil skimmers to scoop oil from the surface. REUTERS/Willy Kurniawan

An Indonesian soldier walks as he patrols a beach affected by oil spill in Karawang, West Java province, August 9, 2019. REUTERS/Willy Kurniawan

Workers carrying sacks containing sands affected by oil spill, queue to load them onto a truck at a shoreline in Karawang, West Java province, August 9, 2019. REUTERS/Willy Kurniawan