Development technology and direction of thermal recovery of heavy oil in China

被引：0
|
作者：
Huanquan S. [1 ]
Huiqing L. [2 ]
Haitao W. [3 ]
Qinglin S. [4 ]
Guanghuan W. [4 ]
Yuanliang Y. [4 ]
机构：
[1] China Petroleum & Chemical Corporation, Beijing
[2] College of Petroleum Engineering, China University of Petroleum, Beijing
[3] Suiopec Petroleum Exploration and Production Research Institute, Beijing
[4] Sinopec Shengli Oilfield Company, Shandong, Dongying
来源：
Shiyou Xuebao/Acta Petrolei Sinica | 2022年 / 43卷 / 11期
关键词：
development direction; development technology; enhanced oil recovery; heavy oil; thermal composite development; thermal recovery;
D O I：
10.7623/syxb202211013a
中图分类号：
学科分类号：
摘要：
Heavy oil is an important type of oil resources. Sustainable and efficient development of heavy oil resources have great significance to national energy security. The main characteristics of thermal recovery of heavy oil in China are summarized as below: as viewed from geological and oil-reservoir characteristics, China boasts various types of heavy oil reservoirs with deep burial, thin bed, strong heterogeneity and complex oil-water system; as for composition, the spatial reticular structure formed from the interaction between colloid and asphaltene molecules leads to high viscosity of heavy oil; as for rheological properties, there is a critical temperature. When the temperature is higher than the critical temperature, heavy oil displays the properties of Newtonian fluids; when the temperature is lower than the critical temperature, heavy oil displays the rheological properties of Bingham fluids with yield value; as for percolation characteristics, heavy oil possesses the properties of underground non-Darcy flow, with a starting pressure gradient, and it is subject to the influences of temperature, reservoir permeability, crude oil viscosity and asphaltene content. This paper summarizes the status quo of heavy oil development technology at home and abroad, and elaborates the main mechanism, applicable conditions, application examples, current problems and development direction of steam huff and puff, steam flooding, steam assisted gravity drainage (SAGD), in situ combustion and thermal composite development. Steam huff and puff is still the main method for thermal recovery of heavy oil and steam flooding is one of the effective substituted techniques to steam huff and puff; SAGD has made important progress in technology introduction and absorption; in situ combustion has become an important technology of greatly improving recovery efficiency; thermal composite development technology has realized efficient production of the marginal heavy oil. It is indicated that heavy oil requires high-quality and efficient thermal recovery technology in the future. In line with the maximization of "double objectives" for recovery efficiency and oil steam ratio, it is required to continuously strengthen reservoir description, dynamic monitoring and injection-production regulation, and actively explore the transformation of heat generation mode, so as to realize efficient development of heavy oil and green low-carbon development. © 2022 Science Press. All rights reserved.
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页码：1664 / 1674
页数：10
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