岩性油气藏 ›› 2021, Vol. 33 ›› Issue (3): 138–144.doi: 10.12108/yxyqc.20210314

• 油气田开发 • 上一篇    下一篇

气液两相嘴流新模型及应用

李南星1,2, 张鹏1,3, 郑锐2, 马龙1,2, 杨成亮1,2   

  1. 1. 中国石油吐哈油田分公司 气举技术中心, 新疆 鄯善 838202;
    2. 中国石油吐哈油田分公司工程技术研究院, 新疆 鄯善 838202;
    3. 中国石油大学 (华东)石油工程学院, 山东 青岛 226580
  • 收稿日期:2020-05-18 修回日期:2020-07-30 发布日期:2021-06-03
  • 第一作者:李南星（1985—），男，硕士，工程师，主要从事油气田开发工程及气举采油工艺等方面的研究工作。地址：（838202）新疆吐鲁番鄯善县火车站镇吐哈石油基地工程技术研究院。Email：linxsc@petrochina.com.cn
  • 通信作者: 张鹏(1981-),男,硕士,高级工程师,主要从事气举、压裂、注水/气技术及井筒安全性等方面的研究工作。Email:zhangpeng2018@qq.com。
  • 基金资助:
    国家油气重大专项“中亚和中东地区复杂碳酸盐岩油气藏采油采气关键技术研究与应用”（编号：2017ZX05030）和中国石油集团公司“十二五”重大专项“中国石油海外油气当量上产2亿吨开发关键技术研究”（编号：2011E-2502）联合资助

New model of gas-liquid two-phase choke flow and its application

LI Nanxing1,2, ZHANG Peng1,3, ZHENG Rui2, MA Long1,2, YANG Chengliang1,2   

  1. 1. Gas-lift Technology Innovation Center, PetroChina Tuha Oilfield Company, Shanshan 838202, Xinjiang, China;
    2. Research Institute of Engineering and Technology, PetroChina Tuha Oilfield Company, Shanshan 838202, Xinjiang, China;
    3. College of Petroleum Engineering, China University of Petroleum(East China), Qingdao 266580, Shandong, China
  • Received:2020-05-18 Revised:2020-07-30 Published:2021-06-03

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摘要： 为了获取较大的利润，合理选择油嘴尺寸和延长油井自喷期十分重要，而北阿油田现有的油井嘴流模型难以满足现场采油的需要。运用瑞利法的量纲分析原理、最小二乘法和基于现场资料的多元线性回归方法，将API重度、黏度和含水率等3个参数加入临界嘴流公式，建立了适用于北阿油田的嘴流新模型。结果表明：新模型预测的质量流速平均相对误差为1.1%，平均绝对误差为6.5%，相关系数为0.876，综合评定系数为0.933；预测产量的平均相对误差为2.9%，平均绝对误差为8.4%，相关系数为0.829，综合评定系数为0.900，与其他评价模型相比，新模型的准确率更高。现场应用表明：运用新模型计算不同生产阶段的产量与现场生产数据具有较好的一致性，不但产量的变化趋势比较吻合，而且对应数据的平均相对误差和平均绝对误差都在10%以内，相比其他模型更符合油田的生产特征，能满足油井产量计算与预测的需求。新模型的建立为该油田合理选择油嘴尺寸、完成日产指标及延长油井自喷期提供了理论依据，同时对其他类似油田也具有借鉴和指导意义。

关键词: 自喷井, 两相嘴流, 模型评价, 临界状态, 北阿油田

Abstract: In order to obtain larger profits，it is important to choose reasonable choke size and extend the flowing period. However，the existing choke flow model is difficult to meet the demands of North Azadegan Oilfield. By using the dimensional analysis principle of Rayleigh method，least square method and multiple linear regression method based on field data，a new choke flow model suitable for North Azadegan Oilfield was established by adding the three parameters of API gravity，crude oil viscosity and water cut to the critical choke flow formula. The results show that the average relative error of the mass flow rate predicted by the new model is 1.1%， the average absolute error is 6.5%，the correlation coefficient is 0.876，and the comprehensive evaluation coefficient is 0.933. The average relative error of the predicted production rate is 2.9%，the average absolute error is 8.4%，the correlation coefficient is 0.829，and the comprehensive evaluation coefficient is 0.900. Compared with other evaluation models，the new model has higher accuracy. Field application shows that the production rate in different stages calculated by the new model has excellent consistency with the on-site production data. Not only the change trend of the production rate is more consistent，but also the average relative error and absolute error of the corresponding data are within 10%. Compared with other models，the new model is more consistent with the production characteristics of the oilfield and can meet the demands of oil well production rate calculation and prediction. The establishment of the new model provides a theoretical basis for the reasonable selection of choke size， the completion of daily production rate and the extension of the flowing period in this oilfield. Furthermore，it has reference and guiding significance for other similar oilfields.

Key words: flowing well, two-phase choke flow, model evaluation, critical state, North Azadegan Oilfield

中图分类号: 

  • TE355.2+1
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