考虑真实井轨迹的油水两相流水平井产能研究

白海世; 马成; 赵玉龙; 康博; 张芮菡; 张烈辉

doi:10.3969/j.issn.1006-6535.2025.05.011

特种油气藏 >

2025 , Vol. 32 >Issue 5: 93 - 101

DOI: https://doi.org/10.3969/j.issn.1006-6535.2025.05.011

油藏工程

考虑真实井轨迹的油水两相流水平井产能研究

白海世 ,
马成 ,
赵玉龙 ,
康博 ,
张芮菡 ,
张烈辉

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1.西南石油大学油气藏地质及开发工程全家重点实验室,四川成都 610500;
2.西南石油大学, 四川成都 6105003.中国石油大庆油田有限责任公司重庆分公司,重庆 4026604.振华石油控股有限公司,北京 100031

白海世(2000—),男,2022年毕业于西南石油大学石油工程专业,2025年毕业于该校石油与天然气工程专业,获硕士学位,现从事油气田开发方向的工作。

收稿日期: 2024-12-18

修回日期: 2025-08-11

网络出版日期: 2025-10-30

基金资助

国家自然科学基金青年科学基金“致密油藏基于化学势的多组分、多机理耦合扩散数值模拟方法研究”(52304048)

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Study on oil-water two-phase productivity of horizontal wells considering actual well trajectory

BAI Haishi ,
MA Cheng ,
ZHAO Yulong ,
KANG Bo ,
ZHANG Ruihan ,
ZHANG Liehui

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1. Southwest Petroleum University State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University,Chengdu, Sichuan 610500, China;
2. Southwest Petroleum University, Chengdu, Sichuan 610500, China;
3. Petro China Daqing Oilfield Co.,Ltd.Chongqing Oilfield Branch,Chongqing 402660, China;
4. China ZhenHua Oil Co., Ltd., Beijing 100031, China

Received date: 2024-12-18

Revised date: 2025-08-11

Online published: 2025-10-30

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摘要

水平井技术作为提高油气田开发效益的关键手段,其产能预测精度直接关系到井网部署与开发方案设计的合理性。但现有模型常忽略实际井轨迹起伏及油水两相渗流特征,导致预测偏差较大。为此,基于当量井径原理和压降叠加理论,结合油水两相拟压力函数,建立考虑真实井轨迹的水平井油水两相产能预测模型。通过离散井段、压降叠加计算和相渗表征,实现了产液剖面的精细预测。研究结果表明:水平井的沿程日产油量分布大体呈“U”形,受实际井轨迹影响日产油量存在波动;随着水平井长度的增加,日产油量缓慢增加;水平井各段日产油量与渗透率正相关,穿过高渗地层有助于提高产能。相渗曲线形态对日产油量和日产水量有显著影响,低含水饱和度下相对渗透率曲线呈水相凹型时,水平井具有最佳产油性能。该研究为优化水平井设计和提高油井产能提供了理论依据。

关键词： 水平井产能; 油水两相流动; 当量井径理论; 压降叠加原理; 真实井轨迹

本文引用格式

白海世 , 马成 , 赵玉龙 , 康博 , 张芮菡 , 张烈辉 . 考虑真实井轨迹的油水两相流水平井产能研究[J]. 特种油气藏, 2025 , 32(5) : 93 -101 . DOI: 10.3969/j.issn.1006-6535.2025.05.011

Abstract

With the growth of global energy demand, horizontal well technology has become an important means for oil and gas field development. Based on the equivalent wellbore radius principle and pressure drop superposition theory, combined with the oil-water two-phase pseudopressure function, a horizontal well oil-water two-phase productivity prediction model considering the actual well trajectory was established. The study results show that the oil production distribution along the horizontal well is generally "U"-shaped, with fluctuations in flow rate due to the actual well trajectory; as the length of the horizontal well increases, the oil production slowly increases; the production of each section of the horizontal well is positively correlated with permeability, and passing through high-permeability formations helps enhance productivity. In addition, the shape of the relative permeability curve has a significant impact on oil and water production. The concave water phase at low water saturation has the best oil production performance, while the reservoir water saturation increases with the oil production of the well gradually decreases. This study provides a theoretical basis for optimizing horizontal well design and improving well productivity.

Key words： horizontal well productivity; oil-water two-phase flow; equivalent wellbore radius principle; pressure drop superposition theory; actual well trajectory

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