酸气不同浓度单位换算数学模型的建立与应用

BUILDING AND APPLICATION OF MATHEMATICAL MODEL FOR CONVERSION OF DIFFERENT CONCENTRATION UNITS OF ACID GAS

我国是拥有含酸气气藏最多的国家之一,天然气含酸气浓度是酸气治理、酸气气藏分类以及安全、合理、高效开发的重要技术决策资料。文章在介绍了不同国家(地区)有关含酸气浓度的不同术语和表示方法的基础上,指出了因术语表示方法多、应用不当所容易导致出现的主要问题;还从气体状态方程出发,首次系统、全面地推导了天然气含酸气质量浓度(g/m3)、体积百浓度(%,体积分数)、10-6浓度(体积分数)、ppm之间的单位换算数学模型,给出了相应的单位换算应用实例;所推导出的不同浓度单位换算数学模型,不仅适用于酸气,也适用于其它气体,特别对含酸气气藏的安全、合理、高效地开发具有十分重要的现实意义。

China is one of the countries that own large amount of natural gas pools containing sour gas in the world. Concentration of sour gas in natural gas is an important parameter for sour gas treatment, classification and safe, rational and highly-efficient development of sour gas pools. The terminologies and expressions of sour gas concentration used in different countries (regions) in the world are introduced and the major problems that may occur due to misuse of the terminologies are presented in this paper. Based on gas state equation, a mathematical model is built for conversion of different sour gas concentration units, such as mass concentration (g/m3), volumetric percentage concentration (%, volume fraction), 10 -6 concentration (volume fraction) and PPM. An example of unit conversion is presented. The mathematical model of unit conversion can be applied not only to sour gas but also to other kinds of gas, and is of great significance to safe, rational and highly-efficient development of gas reservoir containing sour gas.