"crude resources" is a correct and usable phrase in written English.
It typically refers to natural resources that have not been processed or refined. For example: "Oil is the most important of the world's crude resources."
Estimated global reserves of shale oil could increase total world crude resources by 11%, according to a US government report.
The extraction rate of constituents from crude resources was affected by many factors, such factors as extraction solvent, extraction time, temperature, and the ratio of liquid-solid, which were usually considered to have significant effect on compounds extraction rate [ 18, 25].
Iran as a country with an area of 1,900,000 km2 and an approximate population of 76 million people is the fourth country (after Venezuela, Saudi Arabia and Canada) in terms of its crude oil resources (156.53 milliard barrels of crude oil equivalent) and gas condensation; this equals to 9%% of the world's oil stores [1].
With the advancement of oil exploration, there have been more and more crude oil resources discovered in the Xiagou Formation and a great amount of source rocks occur within the Qingxi Sag.
Persians have vast crude oil resources, but they have to export its own oil to neighboring countries to be refined and buy it back at a multiple rate at which they sold.
High-temperature nuclear heat may increase worldwide light crude oil resources by an order of magnitude while reducing greenhouse gas releases from the production of liquid fossil fuels.
North America's crude oil resources have been so thoroughly explored and developed that experts say there is hardly any left to find, except perhaps in the deep waters of the Gulf of Mexico.
Iron-based Fischer-Tropsch synthesis (FTS) has received renewable interests due to the gradual depletion of crude oil resources and its flexible product adjustment from lower olefins to long-chain hydrocarbons.
With the high demand of crude oil resources, developing high water cut reservoir arouses great attention in the past decades.
Due to growing awareness of depleting crude oil resources, rising CO2 levels, global warming and securing energy supply it would be advantageous to use biomass-derived feedstock in existing petroleum refineries.
