puerto ordaz venezuela venezuelan drivers face grow queue buy gasoline despite world large oil reserve add opec country woes refineries sputter socialist economic system crumble line buy fuel shutter service station intermittent problems much year notably outside capital caracas recent days problem worsen line pop service station caracas drivers southern city puerto ordaz wait average four hours fill tank urgent medical appointment suspend gasoline line several block long say nelly gutierrez 35 accountant medicine water internet gasoline long government go put us state oil company petroleos de venezuela pdvsa immediately respond request comment reason apparent dip supply week unclear country refineries function record low due constant outages insufficient supply crude result slump output union leaders refinery workers say pdvsa suffer dramatic cash flow shortage result low oil price struggle pay import fuel fill gap case resolve major supply disruptions within days although one shortage march last several weeks affect export ally trade partner cuba fourteen tankers wait port venezuela caribbean unload total 4.2 million barrel fuel blend components commission pdvsa yet do lack payment accord thomson reuters data ship source early september many 24 cargoes hold await payment least six divert destinations atlantic storm cause supply tighten elsewhere others discharge recent days receive payments pdvsa force prepay fuel import payment delay lead suppliers halt open credit company u.s. sanction impose last month also make difficult pdvsa get letter credit need import export president nicolas maduro say country victim economic war accuse administration u.s. president donald trump worsen situation sanction really sad country situation say driver marvelia dominguez wait fuel car caracas even gasoline always one easy things us find venezuelans face grow queue buy gasoline