Prediction model of wellbore pressure drop in foam drainage gas recovery well based on drift theory

doi:10.7623/syxb202305011

Acta Petrolei Sinica ›› 2023, Vol. 44 ›› Issue (5): 862-872.DOI: 10.7623/syxb202305011

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Prediction model of wellbore pressure drop in foam drainage gas recovery well based on drift theory

Zhang Yuhao^1,2, Wang Zhibin¹, Jiang Qi¹, Liu Yuelong³, Li Kezhi³

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Engineering, Southwest Petroleum University, Sichuan Chengdu 610500, China;
2. State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Shaanxi Xi'an 710049, China;
3. Research Institute of Engineering Technology, Sinopec North China Branch, Henan Zhengzhou 450006, China

Received:2021-11-06 Revised:2023-02-24 Online:2023-05-25 Published:2023-05-31

基于漂移理论的泡沫排水采气井井筒压降预测模型

张宇豪^1,2, 王志彬¹, 蒋琪¹, 刘岳龙³, 李克智³

1. 西南石油大学油气藏地质及开发工程国家重点实验室四川成都 610500;
2. 西安交通大学动力工程多相流国家重点实验室陕西西安 710049;
3. 中国石油化工股份有限公司华北油气分公司工程技术研究院河南郑州 450006

通讯作者: 王志彬,男,1982年3月生,2012年获西南石油大学博士学位,现为西南石油大学石油与天然气工程学院教授,主要从事油气井井筒多相流及采油采气工程方面的教学和科研工作。Email:swpuwzb@163.com
作者简介:张宇豪,男,1994年10月生,2020年获西南石油大学硕士学位,现为西安交通大学博士研究生,主要从事石油工程多相流研究工作。Email:1300938808@qq.com
基金资助:
国家自然科学基金项目"垂直疏水性圆管湍流场中多液滴形成机制及其携带模型研究"（No.51974263）资助。

Abstract

Abstract: The technique of foam drainage for gas recovery is widely used in large domestic and foreign gas fields due to its low cost, simple construction and quick effect, and it plays a leading role in a number of drainage techniques for gas recovery. In fact, it is of great importance to accurately reveal the law of wellbore pressure drop in foam drainage gas recovery well for optimizing the technical parameters and improving the technical level of foam drainage technique. The drift model does not consider flow pattern, and is characterized by simple form and convenience for engineering calculation, thus providing a key direction for the development of gas-liquid two-phase flow. The core parameters of the model are drift velocity and distribution coefficient. In this paper, foam flow experiment was carried out in organic transparent glass tube (inner diameter:30 mm) to test the pressure drop and void fraction at different inclinations (0°-90°), liquid velocities (0.01-0.20 m/s), gas velocities (0-20 m/s) and foam drainage agent concentrations[(0-5 000) ×10^-6]. Experimental data were used to modify the correlations of the drift velocity and distribution coefficient of the drift model, and the calculation method of void fraction under foam flow conditions was also proposed. Based on the above, a new model for predicting the wellbore pressure drop in foam drainage well was established. According to the evaluation results of the new model based on field data, it is indicated that the new model has a prediction ability obviously superior to that of empirical and mechanism models that are commonly used in oil and gas production engineering.

Key words: liquid loading in gas well, foam drainage for gas recovery, foam multiphase flow, drift model, pressure drop

摘要： 泡沫排水采气（泡排）工艺因成本低、施工简单、见效快，在国内外各大气田中广泛应用，在众多排水采气工艺中扮演"主力军"作用。准确揭示泡排井井筒压降规律对于优化泡排工艺技术参数、提高泡沫排水采气工艺技术水平具有重要意义。由于漂移模型不划分流型，具有形式简单、便于工程计算的优点，是气液两相流发展的重要方向，而漂移模型的核心参数是漂移速度和分布系数。通过在30 mm内径的有机透明玻璃管中开展泡沫多相流实验，测试了不同倾斜角（0°~90°）液流速（0.01~0.20 m/s）、气流速（0~20 m/s）及泡排剂浓度[（0~5 000）×10^-6]下的压降规律，利用实验数据对气液两相漂移模型的漂移速度和分布系数进行了改进，提出了泡沫流动条件下的含气率计算方法，以此建立预测泡沫排水采气井筒压降的新模型。利用现场数据对新建模型进行评价的结果表明，新建模型的预测能力优于采油气工程中常用的经验模型和机理模型。

关键词: 气井积液, 泡沫排水采气, 泡沫多相流, 漂移模型, 压降

CLC Number:

TE355.9

Zhang Yuhao, Wang Zhibin, Jiang Qi, Liu Yuelong, Li Kezhi. Prediction model of wellbore pressure drop in foam drainage gas recovery well based on drift theory[J]. Acta Petrolei Sinica, 2023, 44(5): 862-872.

张宇豪, 王志彬, 蒋琪, 刘岳龙, 李克智. 基于漂移理论的泡沫排水采气井井筒压降预测模型[J]. 石油学报, 2023, 44(5): 862-872.

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Prediction model of wellbore pressure drop in foam drainage gas recovery well based on drift theory

基于漂移理论的泡沫排水采气井井筒压降预测模型

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