多点注汽水平井井筒出流规律数值模拟

doi:10.7623/syxb201706009

石油学报 ›› 2017, Vol. 38 ›› Issue (6): 696-704.DOI: 10.7623/syxb201706009

多点注汽水平井井筒出流规律数值模拟

陈会娟¹, 李明忠², 狄勤丰¹, 刘春苗³

1. 上海大学上海市应用数学和力学研究所上海 200072;
2. 中国石油大学石油工程学院山东青岛 266580;
3. 中海油能源发展股份有限公司上海工程技术分公司上海 200335

收稿日期:2016-08-29 修回日期:2017-02-13 出版日期:2017-06-25 发布日期:2017-07-08
通讯作者: 狄勤丰,男,1963年8月生,1984年获石油大学(华东)钻井工程专业学士学位,1997年获西南石油学院油气井工程专业博士学位,现为上海大学教授、博士生导师,主要从事石油工程中的力学问题研究。Email:qinfengd@sina.com
作者简介:陈会娟,女,1987年4月生,2009年获中国石油大学(华东)石油工程专业学士学位,2015年获中国石油大学(华东)油气田开发工程专业博士学位,现为上海大学博士后,主要从事油气田开发工程方面的研究。Email:iichj@126.com
基金资助:
国家重大科技专项（2011ZX05024-005）和中央高校基本科研业务费专项资金项目（14CX06025A）资助。

Numerical simulation of the outflow performance for horizontal wells with multiple steam injection valves

Chen Huijuan¹, Li Mingzhong², Di Qinfeng¹, Liu Chunmiao³

1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China;
2. School of Petroleum Engineering, China University of Petroleum, Shandong Qingdao 266580, China;
3. CNOOC EnerTech-Shanghai Drilling & Producing Branch, Shanghai 200335, China

Received:2016-08-29 Revised:2017-02-13 Online:2017-06-25 Published:2017-07-08

摘要/Abstract

摘要：

基于多点注汽水平井管柱结构，考虑注入蒸汽在水平井筒内的变质量流特性及注汽阀节流压差的影响，建立了多点注汽水平井井筒与储层耦合数学模型，并采用迭代方法对其进行了求解；以此为基础，系统研究了多点注汽水平井井筒出流规律。结果表明：多点注汽水平井注汽过程中，水平段油管内压力、温度和蒸汽干度从水平井跟端到趾端逐渐降低，但压力和温度降低幅度并不显著，蒸汽干度降低幅度较为明显；蒸汽注入量与注汽阀节流压差沿水平段均呈不对称的"U"型分布，且随着时间的增加，蒸汽注入量沿水平井段的不均匀性越来越严重，蒸汽注入量不均匀系数越来越大；通过调整注汽阀沿水平井段泄流面积可以在一定程度上减缓蒸汽沿水平井筒的不均匀注入。

关键词: 多点注汽, 水平井, 注汽阀, 耦合模型, 出流规律

Abstract:

Based on the string structure of horizontal wells with multiple steam injection valves and in consideration of the variable mass flow of injected steam in horizontal wellbore as well as the impacts from throttle differential pressure of steam injection valve, a coupled reservoir-wellbore model of horizontal well with multiple steam injection valves were established and solved using an iterative method. On this basis, the outflow performance of horizontal wellbore with multiple steam injection valves were systematically studied. The results show that the pressure, temperature and steam quality in the tube of horizontal section gradually drop from the wellbore heel to toe in the multipoint steam injection process of horizontal wells. Moreover, the decrease of pressure and temperature is insignificant, while that of steam quality is more obvious. The steam injection rate and the throttle differential pressure of steam injection valve present the "U"-shaped asymmetrical distribution along the horizontal section. In addition, with the time increasing, the non-uniformity of steam injection rate along the horizontal wellbore is intensified, and the non-uniformity coefficient is becoming greater. The non-uniform injection of steam along horizontal wellbore can be slowed down to a certain extent by adjusting the drainage area of steam injection valves.

Key words: multipoint steam injection, horizontal well, steam injection valve, coupled model, outflow performance

中图分类号:

TE345

陈会娟, 李明忠, 狄勤丰, 刘春苗. 多点注汽水平井井筒出流规律数值模拟[J]. 石油学报, 2017, 38(6): 696-704.

Chen Huijuan, Li Mingzhong, Di Qinfeng, Liu Chunmiao. Numerical simulation of the outflow performance for horizontal wells with multiple steam injection valves[J]. Acta Petrolei Sinica, 2017, 38(6): 696-704.

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多点注汽水平井井筒出流规律数值模拟

Numerical simulation of the outflow performance for horizontal wells with multiple steam injection valves

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