A review: Enhanced recovery of natural gas hydrate reservoirs

论文摘要

Natural gas hydrate（NGH） is a highly efficient and clean energy, with huge reserves and widespread distribution in permafrost and marine areas. Researches all over the world are committed to developing an effective exploring technology for NGH reservoirs. In this paper, four conventional in-situ hydrate production methods, such as depressurization, thermal stimulation, inhibitor injection and CO2 replacement, are briefly introduced. Due to the limitations of each method, there has been no significantly breakthrough in hydrate exploring technology.Inspired by the development of unconventional oil and gas fields, researchers have put forward some new hydrate production methods. We summarize the enhanced hydrate exploiting methods, such as CO2/N2–CH4 replacement, CO2/H2–CH4 replacement, hydraulic fracturing treatment, and solid exploration; and potential hydrate mining techniques, such as self-generating heat fluid injection, geothermal stimulation, the well pattern optimization of hydrate exploring. The importance of reservoir stimulation technology for hydrate exploitation is emphasized, and it is believed that hydrate reservoir modification technology is a key to open hydrate resources exploitation, and the major challenges in the process of hydrate exploitation are pointed out. The combination of multiple hydrate exploring technologies and their complementary advantages will be the development trend in the future so as to promote the process of hydrate industrialization.

论文目录

• 1. Introduction
• 2. NGH Reservoir Type
• 3. Introduction of Current Main Production Technology for Hydrates
•   3.1. Depressurization
•   3.2. Thermal stimulation
•   3.3. Inhibitor injection
•   3.4. CO2–CH4replacement
• 4. Field Production Test From Hydrate Reservoirs
• 5. Enhanced Approaches for Recovering Natural Gas Hydrate
•   5.1. CO2/N2–CH4replacement
•   5.2. CO2/H2–CH4replacement
•   5.3. Hydraulic fracturing treatment in NGH reservoir
•   5.4. NGH recovery below freezing point
•   5.5. NGH recovery in solid
• 6. Potential Approaches for Recovering Natural Gas Hydrate
•   6.1. Self-generating heat fluid injection
•   6.2. Geothermal stimulation
•   6.3. Optimizing the well pattern of hydrate exploring
• 7. Challenges in NGH Exploitation
•   7.1. How to maximize single well productivity
•   7.2. How to prevent engineering and geological risks
•   7.3. Low temperature drilling fluid technology
•   7.4. Cementing technology
•   7.5. Sand control technology
•   7.6. How to prevent the secondary formation of hydrates
• 8. Prospect of Hydrate Industrialization

文章来源

类型: 期刊论文

作者: Fengguang Li,Qing Yuan,TiANDuo Li,Zhi Li,Changyu Sun,Guangjin Chen

来源: Chinese Journal of Chemical Engineering 2019年09期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 石油天然气工业

单位: Shandong Provincial Key Laboratory of Molecular Engineering, Qilu University of Technology (Shandong Academy of Science),School of Chemistry and Chemical Engineering, Liaocheng University,State Key Laboratory of Heavy Oil Processing, China University of Petroleum

基金: Supported by the National Key Research and Development Program of China(2017YFC0307302,2016YFC0304003),the National Natural Science Foundation of China(21636009,51576209,51676207,21522609)

分类号: TE377

页码: 2062-2073

总页数: 12

文件大小: 1636K

下载量: 22