A modified model to predict liquid loading in horizontal gas wells

IF 2.6 3区 工程技术 Q3 ENERGY & FUELS Journal of Energy Resources Technology-transactions of The Asme Pub Date : 2023-05-08 DOI:10.1115/1.4062504
Chengcheng Luo, Lirong Gao, Yonghui Liu, Chuan Xie, Changqing Ye, Jianying Yang, Zhongbo Liu
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引用次数: 1

Abstract

Liquid loading is inevitable during mature gas well production, leading the liquids to accumulating at the bottomhole, leading to additional pressure loss. Accurately predicting the liquid-loading initiation is crucial to gas well production optimization. Significant effects have been made to model liquid loading behavior. However, few mechanistic models are capable of easily and accurately tackling the complicated non-uniform liquid-film distribution in the slanted section of horizontal wells. Based on liquid-film inversion, this study developed a simple and comprehensive model to calculate liquid loading initiation for horizontal gas wells. First, the models for film thickness and critical velocity in the vertical pipe are developed. Then, considering the effect of inclination and velocity difference in liquid film thickness and liquid holdup distribution between vertical and inclined pipes, the relationship in vertical and inclined pipes between liquid holdup, liquid film thickness and angle correction term is established based on the liquid holdup correlation for horizontal and inclined pipes described in the empirical model developed by Beggs and Brill, so that the thickness of film and the corresponding critical velocity at any inclination can be calculated. Finally, the new modified model has been evaluated against both experimental and field measured data set. In comparison to the Luo et al. model, the proposed model has been proven to be simple, accurate and well performed in predicting the liquid accumulation initiation in horizontal wells.
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一种改进的水平气井液载预测模型
在成熟气井生产过程中,液体装载是不可避免的,导致液体在井底积聚,导致额外的压力损失。准确预测装液起始是气井生产优化的关键。对液体负载行为建模已经取得了显著的效果。然而,很少有机械模型能够简单准确地处理水平井倾斜段复杂的不均匀液膜分布。基于液膜反演,建立了一个简单、全面的水平气井装液启动计算模型。首先,建立了垂直管道中薄膜厚度和临界速度的模型。然后,考虑了倾斜和速度差对垂直管和倾斜管之间液膜厚度和持液率分布的影响,基于Beggs和Brill建立的经验模型中描述的水平管和倾斜管的持液率相关性,建立了液膜厚度和角度校正项,从而可以计算出任何倾斜下的液膜厚度和相应的临界速度。最后,根据实验和现场测量数据集对新的修正模型进行了评估。与Luo等人的模型相比,所提出的模型已被证明是简单、准确的,并且在预测水平井中的液体积聚开始方面表现良好。
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来源期刊
CiteScore
6.40
自引率
30.00%
发文量
213
审稿时长
4.5 months
期刊介绍: Specific areas of importance including, but not limited to: Fundamentals of thermodynamics such as energy, entropy and exergy, laws of thermodynamics; Thermoeconomics; Alternative and renewable energy sources; Internal combustion engines; (Geo) thermal energy storage and conversion systems; Fundamental combustion of fuels; Energy resource recovery from biomass and solid wastes; Carbon capture; Land and offshore wells drilling; Production and reservoir engineering;, Economics of energy resource exploitation
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