摘要
气井最小临界携液流量的准确计算对于确定气井合理配产、优化气田开发方案具有非常重要的意义。国内外学者在Turner模型的基础上,对临界携液系数进行修正,从而推导出了不同的临界携液流量计算模型,但这些模型均将界面张力和天然气偏差因子取为常数,忽略了温度和压力对它们的影响。因此,对液滴模型进行了修正,通过经验公式计算界面张力,运用DAK方法计算天然气偏差因子,提出了考虑实际界面张力和天然气偏差因子的气井临界携液流量模型。应用修正前后的3种常规模型分别对某气田的临界携液流量进行计算对比,结果表明修正的临界携液模型能够更加准确预测气井状态,判断井筒是否积液,较常规模型具有更高的准确性和科学性,适用于气田实际生产开发。
The accurate calculation of the minimum critical fluid carrying flow of gas wells is of great significance for the determination of reasonable gas well production allocation and optimization of gas field development program. On the basis of Tuner model, scholars at home and abroad modified the critical fluid carrying coefficient, thus different critical fluid carrying flow calculation models were derived. However, these models take the interfacial tension and natural gas deviation factors as constants and ignore the influence of temperature and pressure on them. In this paper, the droplet model was modified, the interfacial tension was calculated by empirical formula, the deviation factor of natural gas was also calculated by DAK method,and the gas well critical fluid carrying flow model considering the actual interfacial tension and the deviation factor of natural gas was proposed. The critical flow rate of a gas field was calculated by three general models before and after modification. The results showed that the modified critical fluid transport model was more accurate than the conventional model in predicting gas well status and determining whether there was fluid accumulation. So it is applicable to the actual production and development of gas field.
作者
薛军
张茂林
宋惠馨
王贺
张艺钟
彭军
唐雯
XUE Jun;ZHANG Mao-lin;SONG Hui-xin;WANG He;ZHANG Yi-zhong;PENG Jun;TANG Wen(School of Petroleum Engineering,Yangtze university,Hubei Wuhan 430100,China;Collaborative Innovation Center for Unconventional Oil and Gas,Yangtze University,Hubei Wuhan 430100,China;Jianghan Oilfield Branch Exploration and Development Research Institute,Hubei Wuhan 430073,China;Southwest Oil and Gas Field Chongqing Gas Field,Chongqing 400021,China)
出处
《当代化工》
CAS
2019年第11期2614-2617,共4页
Contemporary Chemical Industry
基金
十三五国家科技重大专项,涪陵地区五峰组-龙马溪组页岩气压裂及采气规律研究,项目号:2016ZX05060-026
盐间页岩油有效开发技术政策研究,项目号:2016ZX05049005-010.
关键词
临界携液流量
界面张力
天然气偏差因子
critical fluid carrying rate
interfacial tension
deviation factor of natural gas
