基于液膜反转的定向井临界携液模型研究

doi:10.13809/j.cnki.cn32-1825/te.2024.01.020

Abstract

Abstract:

Liquid loading in gas wells is an important challenge during the middle and later stages of exploitation of large inclined wells in Sulige Block. Current critical liquid carrying models suitable for directional wells are limited and often overlook the effects of tubing diameter, liquid flow velocity, and angle. Utilizing multiphase pipe flow experiments, the liquid carrying mechanism in directional wells was studied, analyzing the effects of tubing diameter, angle, and liquid flow velocity on liquid accumulation in gas wells. Based on the liquid film reversal mechanism, the calculation method of parameters C and m in the WALLIS model was derived using experimental data on the basis of the BELFROID model and WALLIS model. A new critical liquid-carrying model has been established by considering the factors such as pipe diameter, gas density, liquid density, angle, apparent liquid flow rate, and gravitational acceleration. The results of the new model for predicting 62 gas wells with liquid loading in VEEKEN’s literature show an accuracy of 91.94%. The establishment of this new model not only further refines the theory of liquid film reversal but also provides theoretical support for predicting liquid loading events in directional wells, offering a valuable tool for optimizing gas production and mitigating liquid loading issues.

Key words: directional well, liquid loading, pipe diameter, liquid-carrying model, time of liquid loading

CLC Number:

TE35

YU Xiangdong, SHI Shuqiang, LI Guoliang, FANG Jinwei, DUAN Chuanli, QI Dan. Research on critical liquid loading model for directional wells based on liquid film inversion[J].Petroleum Reservoir Evaluation and Development, 2024, 14(1): 151-158.

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井型	模型	模型原理及特点	模型考虑参数
直井	TURNER	圆形球体，曳力系数0.44，经典模型	σ、ρ_g、ρ_l
	COLEMAN	圆形球体，曳力系数0.44，井口	σ、ρ_g、ρ_l
	李闽	椭球体，曳力系数1，井口	σ、ρ_g、ρ_l
	杨川东	圆形球体，曳力系数0.44，井底，安全系数1	σ、ρ_g、ρ_l、μ_g
	王毅忠	球帽状，曳力系数1.17	σ、ρ_g、ρ_l
	王志彬	椭球体	σ、ρ_g、ρ_l、C_d、K、We
	潘杰	椭球体，考虑液滴形变和界面自由能	σ、ρ_g、ρ_l、C_d、K
	熊钰	椭球形，C_d采用G_p模型	σ、ρ_g、ρ_l、C_d、K、We
	周德胜	多液滴模型	σ、ρ_g、ρ_l、H_l
	WALLIS	液膜模型	σ、ρ_g、ρ_l
水平井	BELFROID	在液滴模型基础上进行了修正，提出了液膜反转思想	σ、ρ_g、ρ_l、θ
	BARNEA	提出液膜均匀分布的环状流转换边界，机理模型
	SHI	球帽型	g、ρ_g、ρ_l、θ、f_i
	李丽	考虑了雷诺数的影响	σ、ρ_g、ρ_l、C_d、Re

Research on critical liquid loading model for directional wells based on liquid film inversion

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