阿姆河右岸萨曼杰佩气田凝析油潜含量确定方法
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摘要
土库曼斯坦阿姆河右岸萨曼杰佩气田第一天然气处理厂投产前几年,实际回收得到的商品凝析油产量与理论设计指标出现了重大偏离,合作方对此提出了严重质疑,要求中方给出科学合理的解释。为了准确测定该气田的凝析油潜含量和处理厂凝析油产量,根据气田的实际情况建立了流体取样技术规范和流体分析实验方法(以下简称新方法),据此测定气田井流物组成和凝析油潜含量,并采用新方法和俄罗斯方法对凝析油相关参数、凝析油潜含量进行了计算和对比分析。结果表明:(1)新方法要求天然气组分分析到C_(10)~+以及组分中的N_2、He、H_2、O_2+Ar、CO_2、H_2S,凝析油组分分析超过C_(30)~+;(2)按俄罗斯方法计算的凝析油潜含量为77.27 g/m~3,按中方新方法计算的凝析油潜含量为76.21 g/m~3,双方计算结果一致;(3)较之于其他老方法,新方法的精度更高、计算结果更加可靠。结论认为,新方法准确地确定了该气田的凝析油潜含量,解决了困扰中国石油阿姆河天然气公司在阿姆河右岸油气开发合作A区生产中的重大技术难题,为该公司A区扩能改造和B区气田开发方案设计、二期产能建设提供了重要的技术支持。
The actual condensate oil production rate was far lower than that in the theoretical design index in the first few years' production of No. 1 Production Plant of the Samandepe Gas Field, the Right Bank of the Amu Darya River of Turkmenistan, for that the partner raised serious questions about our side and required a scientific and reasonable explanation. To accurately determine the potential content of condensate oil in this field and the condensate oil production rate in this plant, we established technical codes for fluid sampling and test methodologies for fluid analysis, based on which we analyzed and determined the compositions of well fluid and condensate oil content in this field, and then the relevant parameters and potential content of condensate oil were calculated and compared by the Russian method and our newly-established method. The following results were demonstrated.(1) In the newly-established method, the compositions of natural gas are required to include C_(10)+ and N_2, He, H_2, O_2+Ar, CO_2, and H_2S and the components of condensate oil required to exceed C_(30)~+;(2) The condensate oil content of this field is calculated to be 77.27 g/m~3 by the Russian method and 76.21 g/m~3 by the new method, indicating that both methods have identical results;(3) Compared with the other old methods, this new method is of higher accuracy and the calculated results are more reliable. It is concluded that this new method can not only be used to determine the potential content of condensate oil in this field but solve the major technical issue perplexing Block A of the CNPC Turkmenistan Amu Darya Natural Gas Company. It also provides a robust technical support for the further production-expansion transformation of Block A and the nextstep development design for Block B, and the productivity construction of Project Ⅱ.
The actual condensate oil production rate was far lower than that in the theoretical design index in the first few years' production of No. 1 Production Plant of the Samandepe Gas Field, the Right Bank of the Amu Darya River of Turkmenistan, for that the partner raised serious questions about our side and required a scientific and reasonable explanation. To accurately determine the potential content of condensate oil in this field and the condensate oil production rate in this plant, we established technical codes for fluid sampling and test methodologies for fluid analysis, based on which we analyzed and determined the compositions of well fluid and condensate oil content in this field, and then the relevant parameters and potential content of condensate oil were calculated and compared by the Russian method and our newly-established method. The following results were demonstrated.(1) In the newly-established method, the compositions of natural gas are required to include C_(10)+ and N_2, He, H_2, O_2+Ar, CO_2, and H_2S and the components of condensate oil required to exceed C_(30)~+;(2) The condensate oil content of this field is calculated to be 77.27 g/m~3 by the Russian method and 76.21 g/m~3 by the new method, indicating that both methods have identical results;(3) Compared with the other old methods, this new method is of higher accuracy and the calculated results are more reliable. It is concluded that this new method can not only be used to determine the potential content of condensate oil in this field but solve the major technical issue perplexing Block A of the CNPC Turkmenistan Amu Darya Natural Gas Company. It also provides a robust technical support for the further production-expansion transformation of Block A and the nextstep development design for Block B, and the productivity construction of Project Ⅱ.
引文
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[12]СтарощельскийВИ,ЮшкинВЮ.Расчет балансовых запасов и извлекаемых запасов конденсата,этана,пропана,бутана и т.д.инеуглеводородных компонентов,руководство по методу о пределения потенциального содержания ихв пластовом газе[S].Москва:Всесоюзныйнаучно-исследовательский институт природного газа,1984г.
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[2]国家能源局.油气藏流体取样方法:SY/T 5154—2014[S].北京:石油工业出版社,2015.National Energy Administration.Sampling procedures for hydrocarbon reservoir fluids:SY/T 5154-2014[S].Beijing:Petroleum Industry Press,2015.
[3]刘文伟,裴红.吉拉克凝析气田地面工艺技术[J].石油规划设计,2006,17(6):19-21.Liu Wenwei&Pei Hong.Surface facilities technology for Jilake condensate gas field[J].Petroleum Planning&Engineering,2006,17(6):19-21.
[4]马永祥.凝析气藏开发中的流体解析技术[J].断块油气田,1999,6(5):27-32.Ma Yongxiang.The fluid analytic technology in condensate gas reservoir production[J].Fault-Block Oil and Gas Field,1999,6(5):27-32.
[5]刘东,张久存,王永红.凝析气井气窜后的产能变化特征及调整效果[J].大庆石油地质与开发,2009,28(3):70-73.Liu Dong,Zhang Jiucun&Wang Yonghong.Productivity variations and adjustment effects of condensate gas wells after gas breakthrough[J].Petroleum Geology&Oilfield Development in Daqing,2009,28(3):70-73.
[6]赵忠德,王保群,韩坤,艾勇.中国天然气储运设施建设对东北亚天然气市场的影响[J].石油规划设计,2016,27(1):5-9.Zhao Zhongde,Wang Baoqun,Han Kun&Ai Yong.The impact of natural gas storage and transportation facilities in China on natural gas market of Northeast Asia[J].Petroleum Planning&Engineering,2016,27(1):5-9.
[7]李士伦,王鸣华,何江川.气田与凝析气田开发[M].北京:石油工业出版社,2004.Li Shilun,Wang Minghua&He Jiangchuan.Gas field and condensate gas field development[M].Beijing:Petroleum Industry Press,2004.
[8]张培军,高仪君,万翠蓉,刘荣和,张李,李洪玺.阿姆河右岸奥贾尔雷气田气井生产异常压力产生原因及对策[J].天然气工业,2016,36(10):77-84.Zhang Peijun,Gao Yijun,Wan Cuirong,Liu Ronghe,Zhang Li&Li Hongxi.Origins of and countermeasures for the abnormal pressures in well production of the Ojarly gas field in the Right Bank of the Amu-Darya River,Turkmenistan[J].Natural Gas Industry,2016,36(10):77-84.
[9]周克明.中国石油阿姆河天然气公司流体分析实验规范[R].北京:中国石油(土库曼斯坦)阿姆河天然气公司,2011.Zhou Keming.Experimental specification for fluid analysis of Amu Darya Natural Gas Company,Petro China[R].Beijing:CNPC Turkmenistan Amu Darya Natural Gas Company,2011.
[10]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.天然气的组成分析气相色谱法:GB/T13610—2014[S].北京:中国标准出版社,2015.General Administration of Quality Supervision,Inspection and Quarantine of the PRC&Standardization Administration of the PRC.Analysis of natural gas Composition—Gas chromatography:GB/T 13610-2014[S].Beijing:Petroleum Industry Press,2015.
[11]中华人民共和国国家发展和改革委员会.石油和沉积有机质烃类气相色谱分析方法:SY/T 5779—2008[S].北京:石油工业出版社,2008.National Development and Reform Commission.Analytical method of hydrocarbons in petroleum and sediment by gas chromatography:SY/T 5779-2008[S].Beijing:Petroleum Industry Press,2008.
[12]СтарощельскийВИ,ЮшкинВЮ.Расчет балансовых запасов и извлекаемых запасов конденсата,этана,пропана,бутана и т.д.инеуглеводородных компонентов,руководство по методу о пределения потенциального содержания ихв пластовом газе[S].Москва:Всесоюзныйнаучно-исследовательский институт природного газа,1984г.
[13]Сергей,Андрей.Исследование газоконденсатных мессторождений на газоконденсатоность—Методы промысловых исследований на газоконденсатность[M].Москва:Издательство не известно,Год издания не исвестен.