Home›Unconventional oil›重質原油🌐日本語EnglishEspañolFrançaisРусскийالعربيةفارسی中文日本語EntityQ15280487· pop 7· linked from 427 articles重質原油Also known as extra heavy crude oilhighly-viscous oil that cannot easily flow to production wells under normal reservoir conditionsAvailable in 7 languagesEspañol日本語РусскийالعربيةUkrainianفارسیvia Wikidata sitelinks · CC0ConnectionsviscosityEntityoil refineryEntityCategoriesUnconventional oil