Nigeria, the fifth-biggest source of oil imports for the U.S., holds reserves of more than 36 billion barrels of crude and 187 trillion cubic feet of gas.

尼日利亚美国第五大原油进口来源国拥有超过360亿桶原油储备和1亿8千7百万立方英尺的天然气储备。

State oil companies control three-quarters of the world's crude oil reserves. Three of the four largest Banks by market capitalisation are state-controlled.

国有石油公司控制这世界上四分之三的原油储备，全世界市值最高的四家公司里有三家就是国有控股。

State oil companies control three-quarters of the world's crude oil reserves.

国有石油公司控制了全球四分之三的石油储量。

Texas has nearly a quarter of America's crude oil reserves, and 30% of its natural gas.

德州拥有美国四分之一的原油储量和30%的天然气。

With a total of 55 percent of the world's crude oil reserves and 41 percent of its natural gas, why should they?

这些中东国家，其原油储量占世界原油储量的55%，其天然气储量也占世界天然气储量的41%，即然如此，为什么这些国家还要去接纳别的其它能源？

Iraq is thought to have one of the world's largest supplies of crude oil, with 115 billion barrels in proven reserves.

伊拉克是世界原油供应能力最大的国家之一，探明储量高达1,150亿桶。

Increased reserves were found for 57 minerals, including 1.34 billion tons of crude oil, 647.2 billion cubic meters of natural gas and 23.11 billion tons of coal.

有57种矿产新增查明资源储量，其中，石油13.4亿吨，天然气6472亿立方米，原煤231.1亿吨。

To improve crude oil recovery and increase economic recoverable reserves, we have to convert to steam flooding.

为进一步提高油藏采收率，增加经济可采储量，有必要转换。

The existence of aerobic and anaerobic bacteria in reservoirs not only reduces oil reserves but also lowers the quality of crude oil.

储层中喜氧与厌氧菌的存在，不仅破坏石油储量，还使原油质量明显下降。

High sulfur contents of the crude oil reserves, the need for fuels ultra-low in sulfur and continued stringent regulations call for deep desulfurization technologies.

低含硫矿物燃料的稀缺、高品质清洁燃料油的需求和日益严格的控制标准迫切需要开发燃烧前深度脱硫技术。

Dalian is an important crude oil reserves and refining and chemical base of China and its crude oil demand is very big.

大连是国家重要的原油储备以及炼化基地，对进口原油的需求量较大。