酸性天然气含水量的公式化计算方法及其适应性分析  

Formula calculation methods of water content in sour natural gas and their adaptability analysis

作　　者：诸林[1] 李璐伶[1] 覃丽 诸佳[1,3] 范峻铭[1] 

机构地区：[1]西南石油大学化学化工学院 [2]中国石油西南油气田公司蜀南气矿泸州炭黑厂 [3]中国石油西南油气田公司川中油气矿遂宁作业区

出　　处：《天然气工业》2014年第6期123-129,共7页Natural Gas Industry

基　　金：国家自然科学基金项目(编号:u1262111)

摘　　要：酸性天然气含水量大于相同条件下的非酸性天然气含水量，酸性天然气含水量的计算公式是在非酸性天然气含水量计算公式的基础上校正而得的。归纳总结了酸性天然气含水量公式化计算的主要方法，并进行了评价：基于组分贡献模型的有Bukacek-Maddox公式、Bahadori公式；基于等效H2S模型的有Mohammadi公式、Khaled公式；基于酸气对水烃体系平衡影响的有王俊奇公式、修正热力学模型公式。比较各公式计算值与实验值的差异可知，王俊奇公式的平均误差最大（33．755％）；简化热力学模型＋Mohammadi公式的平均误差最小（4．895％）。对比不同温度范围内所适用公式的平均误差，推荐温度为0～104．44℃时，使用简化热力学模型＋Mohammadi公式；温度为104．44～120．44℃时，使用Bahadoir＋Khaled公式；温度为120．44～140℃时，使用诸林＋Khaled公式；温度为140～171．11℃时，使用Khaled＋Khaled公式；温度为171．11～204．44℃时，使用Bukacek＋Mohammadi公式。Water content in sour natural gas are more than that in sweet natural gas under the same condition, The formula calculation methods of water content in sour natural gas are corrected based on those methods of water content in sweet natural gas. This paper reviewed and evaluated several main methods. The Bukacek-Maddox and Bahadori methods are based on the Component Contribution Model. Methods depending on the equivalent mol fraction of H2S model include the Mohammadi and Khaled methods. Methods corrected by considering the effect of acid gas on the physical property directly include the Wang Junqi method and the Modified Thermodynamic Model. The best combination one among the above methods was chosen respectively by combining them randomly and calculating the AAD （average absolute deviation） results. Comparing the results with reported values we know that the Wang Junqi method produces the maximum AAD of 33.755%. On the contrary, the combination of the Mohammadi method and Simplified Thermodynamic Model generates the minimum AAD of 4.895 %. And in contrast with the AAD results calculated by the available methods at different conditions, we recommend the combination of the Mohammadi method and Simplified Thermodynamic Model be used at temperatures from 0 to 104.44 ℃ ; the combination of Khaled method and Bahadori method at temperatures from 104.44 to 120.44℃ ; the combination of the Khaled method and Zhu Lin method at temperatures from 120.44 to 140 ℃ ; and the combination of the Khaled method and Khaled method at temperatures from 140 to 171.11 ℃ ; and the combination of the Mohammadi method and Bukacek method at temperatures from 171.11 to 204.44 ℃.

关 键 词：天然气 酸性天然气 含水量 公式化 计算 组合 评价 方法 

分 类 号：TE642[石油与天然气工程—油气加工工程]