稠油油藏蒸汽-空气复合火驱特征分析及参数优化

袁士宝; 任梓寒; 杨凤祥; 孙新革; 蒋海岩; 宋佳

doi:10.3969/j.issn.1006-6535.2024.01.008

特种油气藏 >

2024 , Vol. 31 >Issue 1: 66 - 73

DOI: https://doi.org/10.3969/j.issn.1006-6535.2024.01.008

油藏工程

稠油油藏蒸汽-空气复合火驱特征分析及参数优化

袁士宝 ,
任梓寒 ,
杨凤祥 ,
孙新革 ,
蒋海岩 ,
宋佳

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1.西安石油大学,陕西西安 710065;
2.陕西省油气田特种增产技术重点实验室,陕西西安 710065;
3.中国石油新疆油田分公司,新疆克拉玛依 834000

袁士宝(1977—),男,教授,博士生导师,2001年毕业于石油大学(华东)石油工程专业,2007年毕业于中国石油大学(华东)油气田开发工程专业,获博士学位,现主要从事热采及油藏管理方面的工作。

收稿日期: 2023-05-23

修回日期: 2023-12-08

网络出版日期: 2024-04-18

基金资助

国家自然科学基金“基于热-流-固-化多场耦合的火驱储层热次生孔道演化及盐沉析调控机理研究”(52274039);陕西省自然科学基础研究重点项目“基于多点微波加热的油页岩原位热解开采方法研究”(2022JZ-28);西安石油大学研究生创新与实践能力培养计划“稠油油藏蒸汽-空气多介质复合火驱机理研究”(YCS23114109)

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Characterization and Parameter Optimization of Steam-Air Compound Flooding in Heavy Oil Reservoirs

Yuan Shibao ,
Ren Zihan ,
Yang Fengxiang ,
Sun Xin′ge ,
Jiang Haiyan ,
Song Jia

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1. Xi′an Shiyou University, Xi′an, Shaanxi 710065, China;
2. Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil and Gas Reservoirs, Xi′an, Shaanxi 710065, China;
3. PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China

Received date: 2023-05-23

Revised date: 2023-12-08

Online published: 2024-04-18

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摘要

针对常规火驱存在热利用率低和高黏油启动慢的问题,以新疆红浅1井区稠油油藏为例,利用数值模拟模型对比了常规火驱和蒸汽-空气复合火驱的驱油特性和燃烧特性,通过对复合火驱各区带的温度、含油饱和度等参数进行分析,探究了蒸汽-空气复合火驱协同增效作用,并对蒸汽-空气复合火驱的注入参数进行了优化。结果表明:提产增效的主要机理是湿蒸汽吸收已燃区中滞留的热量变为过热蒸汽,并被高速流动的空气携带穿过燃烧前缘,使冷油区原油黏度大幅度降低,在提高驱油效率的同时增大了蒸汽冷凝带的宽度、燃烧波及体积和火线推进速度;注入参数的优化能提高复合火驱的开发效果,水气比越大,产能越高,而采用段塞注入会降低产能,为满足经济效益开发,最佳水气比应为3.0×10^-3m³/m³左右,最佳注汽段塞间隔应为90~120 d。该研究成果对火驱油藏提高开发效果具有借鉴意义。

关键词： 稠油油藏; 火驱; 湿式燃烧; 燃烧特征; 驱油机理

本文引用格式

袁士宝 , 任梓寒 , 杨凤祥 , 孙新革 , 蒋海岩 , 宋佳 . 稠油油藏蒸汽-空气复合火驱特征分析及参数优化[J]. 特种油气藏, 2024 , 31(1) : 66 -73 . DOI: 10.3969/j.issn.1006-6535.2024.01.008

Abstract

Aiming at the problems of the low heat utilization rate and slow startup of high viscosity oil in conventional fire flooding, taking the heavy oil reservoirs in Xinjiang Hongqian 1 Well Area as an example, the numerical simulation model was used to compare the oil displacement characteristics and combustion characteristics of conventional fire flooding and steam-air compound flooding, and the synergistic effects of the steam-air compound flooding was investigated and the injection parameters of the steam-air compound flooding were optimized through the analysis of the temperatures, oil saturation, and other parameters of the compound flooding in each zone. The results show that the main mechanisms to increase production and enhance efficiency are that the moist steam absorbs the heat retained in the combustion zone, becomes superheated steam, and is carried by the high-rate air across the combustion fronts so that the viscosity of the crude oil in the cold oil zone is significantly reduced, which improves the oil displacement efficiency while increasing the width, swept volume of combustion, and burning rate of the steam condensate zone; the optimization of the slug injection parameter could improve the development effect of the compound flooding, and the higher water-air ratio could make the production capacity higher; the optimal water/gas ratio should be about 3.0, and the optimal intervals between the steam injection slugs should be 90-120 d to meet the economic benefits of development because the slug injection could decrease production capacity. The research results are of great significance to improving the development effect of the fire flooding oil reservoirs.

Key words： heavy oil reservoir; fire flooding; wet combustion; combustion characteristics; oil displacement mechanism

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