基于喷嘴虚高的气液两相在线计量模型的实验方法  

Experimental method of gas-liquid two-phase online metering model based on nozzle flow overreading

作　　者：魏方方 张倩 吴浩达 矫欣雨 檀朝东[2] WEI Fangfang;ZHANG Qian;WU Haoda;JIAO Xinyu;TAN Chaodong(Anhui Firstcon Instrument Co.,Ltd.,Chizhou,Anhui 247210,China;College of Petroleum Engineering,China University of Petroleum,Beijing 102249,China;Sinopec Shengli Oilfield Branch Luming Company,Dongying,Shandong 257000,China)

机构地区：[1]安徽中控仪表有限公司,安徽池州247210 [2]中国石油大学(北京)石油工程学院,北京102249 [3]中国石油化工股份有限公司胜利油田分公司鲁明公司,山东东营257000

出　　处：《油气井测试》2022年第5期12-16,共5页Well Testing

基　　金：国家自然科学基金项目“基于大数据解析的大规模非集输油井群生产及拉运调度协同优化”(51974327);安徽省重点研究与开发计划项目“基于大数据的油田原油拉送生产智能调度系统的研发”(201904a05020028)。

摘　　要：针对湿天然气流量因虚高影响难以准确计量的问题,开展了基于喷嘴的气液两相在线计量模型的实验。通过实验测量分析了压差波动与气相含率、液相含率、干度的关系,利用压差波动数据拟合湿气干度-差压相关式,得到虚高相关式和修正后的气相流量计量模型,降低计量误差,提高湿气在线计量结果的准确性和可靠性。实验结果表明,湿气流经喷嘴计量装置时,液相含量对压差波动的影响占主导地位,气相含率在0.97以上时,压差波动的整体趋势随着气相体积含率增加而减小。经过虚高实验拟合修正的气相流量计量模型的计算结果与实验实测结果误差仅为8.7%,为油气生产过程中气液两相实时测量提供了一种新方法。It is difficult to accurately measure the wet gas flow due to overreading.An experiment was performed on the gas-liquid two-phase online metering model based on the nozzle.The relationship between the pressure difference fluctuation and the gas phase fraction,liquid phase fraction or dryness was analyzed.Using the pressure difference fluctuation data to fit the wet gas dryness-pressure difference correlation,the overreading correlation and the corrected gas flow metering model were obtained,which reduce the metering error and improve the accuracy and reliability of the wet gas online metering results.The experimental results show that when the wet gas flows through the nozzle metering device,the influence of the liquid content on the pressure difference is dominant.When the gas fraction reaches above 0.97,the overall trend of the pressure difference decreases with the increase of the gas volume fraction.The error between the experimental results and the calculated results of the gas-phase flow metering model corrected by overreading experiment is only 8.7%,which provides a new method for gas-liquid two-phase real-time metering in the process of oil and gas production.

关 键 词：湿气 气液两相 气相含率 液相含量 喷嘴节流元件 虚高系数 在线计量 实验方法 

分 类 号：TE375[石油与天然气工程—油气田开发工程]