The sun had risen over the Caribbean Sea when Frank González spotted “the stain” — an oil slick on the water that stretched for miles. “The sea looked like butter, because of the thickness of the water,” said González, a fisherman who saw the spill this month while working off the coast of Venezuela’s Falcón state. “It was painful to see.”

Venezuela’s once powerful oil industry is literally falling apart, with years of mismanagement, corruption, falling prices and a U.S. embargo imposed last year bringing aging infrastructure to the brink of collapse. As the government scrambles to repair and restart its fuel-processing capacity, analysts are warning that ruptured pipelines, rusting tankers and rickety refineries are contributing to a mounting ecological disaster in this failing socialist state.

Oil workers say the gushing crude soiling the coast of Falcón state this month came from a cracked underwater pipeline linked to attempts to restart fuel production at the aging Cardón refinery. Not far from the oil slick, fisherman say, is a jetting geyser of natural gas from a second broken pipeline.

“The gas leak looks like a boiling pot about to explode,” González said.

“Our fear is that as they try to fix and restart these refineries and oil centers, we’re only going to see more of this,” said Cristina Burelli, international liaison for SOSOrinoco, a nonprofit focused on environmental damage in Venezuela. “More underground oil pipelines are blowing up. The whole system is corroded and falling apart.”

A map locating oil spills in Venezuela