天然气

Along with many new materials and techniques,helium abstraction technologies from natural gas have been innovated like the adsorption and membrane osmose process have developed fast and coproduction and combined technologies have a good application prospect, which provide new thoughts for the development of helium abstraction technologies from natural gas.

随着新材料、新技术的发展，天然气提氦技术不断改进创新，吸附法、膜渗透法等提氦工艺发展迅速，联产法、联合法工艺有着良好的应用前景，这些都为促进天然气提氦技术的发展提供了新的思路。

Through analysis on the present technologies, this study discovered that low-temperature condensation is a relatively matured method with high cost and highly-consumed energy; the other methods like adsorption, absorption and membrane osmose process are differently characterized by many features hut have not been applied in industrial use for many reasons, Along with many new materials and techniques, helium abstraction technologies from natural gas have been innovated like the adsorption arid membrane osmose process have developed fast and co-production and combined technologies have a good application prospect, which provide new thoughts for the development of helium abstraction technologies from natural gas.

通过对目前提氦技术的分析介绍，低温冷凝法较为成熟，但能耗、成本较高；吸附法、吸收法和膜渗透法等其他提氦技术各其特点，但目前限于适用条件尚不能规模化工业应用，随着新材料、新技术的发展，天然气提氦技术不断改进创新，吸附法、膜渗透法等提氦工艺发展迅速，联产法、联合法工艺有着良好的应用前景，这些都为促进天然气提氦技术的发展提供了新的思路。

Ordos basin is one of the most potential gas reservoir region in China and the Upper Paleozoic is the important exploration target.

鄂尔多斯盆地是中国天然气勘探最有潜力的盆地之一，其上古生界具有巨大的天然气勘探潜力。

From this perspective, flammable ice can be regarded as the natural gas in the highest purity, and you know, the general state of the natural gas, methane is only about 92% less, in addition to about 3% of the ethane, about 2% of the nitrogen and about 1% of the propane, as well as a very small amount of butane, pentane and oxygen and so on.

从这个角度说，可燃冰可算是自然中纯度最高的天然气了，要知道，一般状态下的天然气中，甲烷大约只占92%不到，此外还有3%左右的乙烷、2%左右的氮气和1%左右的丙烷，以及极少量的丁烷、戊烷和氧气等。

After studying many domestic and abroad papers, the paper follows the recent study of optimal design and organization of gathering pipeline system. According to working condition of natural gas gathering pipeline system in west part of Sichuan.Based on topology, geography conditions of the gas field and different exploitive phase establishing optimal structure parameter mathematical models of pipe network. The object of models is net present investment value of pipe network.

本文调研了国内外大量文献，紧跟国内外天然气管网系统优化设计及运行方面的最新研究成果，结合天然气集输配管网系统的实际运行状况，采用分级优化法，开展集输站场优化布局研究、集输管网结构优化研究、地面输送系统优化运行研究等方面的深入研究。

Upstream: includes oil and gas Exploration and Production, Gas and Power and other energy sources

上游：包括石油及天然气的勘探与生产，天然气与电力及其它能源

By com- prehensive analysis of generating intensity of source rock, transporting efficiency of gas through fault and thickness of caprock of Tertiary, the favorable areas of gas accumulation and distribution were forecasted.

根据烃源岩的生气强度、断裂输导天然气效率和新近系盖层厚度条件进行叠合，对库车坳陷北带天然气成藏与分布的有利区进行预测。

The company, which is a unit of state-owned China National Petroleum Corporation, is the country' s biggest oil and gas producer.

中石油是国营中国国家石油天然气集团公司的一部分，是中国最大的石油和天然气生产商。

The company, which is a unit of state-owned China National Petroleum Corporation, is the country's biggest oil and gas producer.

中石油是国营中国国家石油天然气集团公司的一部份，是中国最大的石油和天然气生产商。

In the meantime, natural gas also is a kind of serious industrial chemicals, producible a variety of chemical industry products, have great economic value to national economy, the treatment of natural gas and use having wide market perspective.

同时，天然气也是一种重要的化工原料，可生产多种化工产品，对国民经济具有重大的经济价值，天然气的加工及利用有着广阔的市场前景。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。