Technical bottlenecks and development strategies of enhancing recovery for tight oil reservoirs

doi:10.7623/syxb202004009

Acta Petrolei Sinica ›› 2020, Vol. 41 ›› Issue (4): 467-477.DOI: 10.7623/syxb202004009

• Petroleum Exploration • Previous Articles Next Articles

Technical bottlenecks and development strategies of enhancing recovery for tight oil reservoirs

Kang Yili¹, Tian Jian¹, Luo Pingya¹, You Lijun¹, Liu Xuefen^1,2

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Sichuan Chengdu 610500, China;
2. College of Energy Engineering, Longdong University, Gansu Qingyang 745000, China

Received:2019-02-19 Revised:2019-11-24 Online:2020-04-25 Published:2020-05-09

致密油藏提高采收率技术瓶颈与发展策略

康毅力¹, 田键¹, 罗平亚¹, 游利军¹, 刘雪芬^1,2

1. 西南石油大学油气藏地质及开发工程国家重点实验室四川成都 610500;
2. 陇东学院能源工程学院甘肃庆阳 745000

通讯作者: 游利军,男,1976年10月生,2000年获西南石油学院学士学位,2006年获西南石油大学博士学位,现为西南石油大学教授、博士生导师,主要从事储层保护、非常规油气、岩石物理研究与教学。Email:youlj0379@126.com
作者简介:康毅力,男,1964年2月生,1986年获大庆石油学院学士学位,1998年获西南石油学院博士学位,现为西南石油大学教授、博士生导师,主要从事储层保护、非常规天然气、油气田开发地质研究与教学。Email:cwctkyl@163.com
基金资助:
国家自然科学基金项目"富有机质页岩氧化致裂增渗加速气体传输机理研究"（No.51674209）、非常规油气层保护四川省青年科技创新研究团队项目（2016TD0016）和甘肃省高等学校科研项目"陇东超低渗透油藏降压增注及提高采收率方法研究"（2018A-097）资助。

Abstract

Abstract:

Tight oil reservoirs are becoming a hotspot in the exploration and development of global oil and gas resources. The development benefits of tight oil reservoirs reflect the technological capabilities and levels of oil exploration and development in a country to a certain extent. Overall, the average recovery of tight oil reservoirs around the world is about 5%-10%, and is much lower than that of conventional oil reservoirs. China's tight oil reservoirs have complex geological characteristics, and the key technologies for their development are still in the preparation stage before breakthrough. The relatively mature matching technology for the development of tight oil reservoirs from America cannot be directly copied and applied. Aiming at the current low recovery of tight oil reservoirs and the lagging development of relevant supporting technologies in China, the paper summarizes the main key technologies for the development and enhanced oil recovery of tight oil reservoirs, and analyzes such problems as theoretical understanding and technical bottlenecks to be resolved. According to the analysis, the new way to improve the recovery and comprehensive development benefits of tight oil reservoirs will include:carrying out the multi-dimensional technology thought integrating geological engineering, protection and reform, increasing seepage and energy enhancement, as well as oil washing and flooding; in combination with large-scale reservoir reform by hydraulic fracturing, implementing water injection by interfacial modification and crude oil oxidation in reservoirs to achieve an effective increase in energy and injection; carrying out multi-link, multi-scale, and multi-field comprehensive regulation of oil-water flow behavior, and significantly enhancing oil-water flow capacity.

Key words: tight oil reservoirs, multi-dimensional integration, multi-scale seepage, interfacial modification, enhanced oil recovery

摘要：

致密油藏正在成为全球油气资源勘探开发热点领域。致密油藏开发效益在一定程度上反映了一个国家当代石油勘探开发的技术能力和水平。总体来看，全球范围内致密油藏平均采收率为5%~10%，远低于常规油藏。中国致密油藏地质特征复杂，其开发关键技术尚处于突破前的准备阶段，美国相对成熟的致密油藏开发配套技术不能直接照搬应用。针对中国致密油藏采收率低和相关配套技术发展滞后的现状，概述了致密油藏开发和提高采收率的主要关键技术，剖析了待解决的理论认识与技术瓶颈等问题。分析认为，推行致密油藏开发地质工程、保护改造、增渗增能、洗油驱油"多维一体化"技术思路，协同大型水力压裂储层改造，实施界面修饰注水和储层原油氧化实现有效增能增注，开展多环节、多尺度、多场综合调控油水流动行为，显著增强油水流动能力，将是提高致密油藏采收率及开发综合效益的新途径。

关键词: 致密油藏, 多维一体化, 多尺度渗流, 界面修饰, 提高采收率

CLC Number:

TE357

Kang Yili, Tian Jian, Luo Pingya, You Lijun, Liu Xuefen. Technical bottlenecks and development strategies of enhancing recovery for tight oil reservoirs[J]. Acta Petrolei Sinica, 2020, 41(4): 467-477.

康毅力, 田键, 罗平亚, 游利军, 刘雪芬. 致密油藏提高采收率技术瓶颈与发展策略[J]. 石油学报, 2020, 41(4): 467-477.

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Technical bottlenecks and development strategies of enhancing recovery for tight oil reservoirs

致密油藏提高采收率技术瓶颈与发展策略

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