摘要:
针对琼东南海域天然气水合物绿色高效安全开采对提升我国能源战略地位，实现“双碳”目标具有重要意义。琼东南海域主要为黏质粉砂和粉砂质黏土水合物储层，使用传统的降压、升温和CO2置换开采法均存在很大挑战。本文从深海能源土温-压-力-化耦合条件下宏微观力学特性与表征方法、深海能源土工程问题分析的多场耦合多尺度理论和数值仿真方法以及水合物绿色高效安全开采与适应性评价三个方面总结了近年来国内外的研究现状，探讨现有水合物开采研究在琼东南海域应用存在的问题和局限性。提出应综合考虑应综合考虑降压、升温、CO2置换/注入及其他提高产气率、固碳率和工程安全性措施，以期实现琼东南海域水合物绿色高效全周期安全开采。
Abstract:
Green, efficient, and safe extraction of natural gas hydrates from Qiongdongnan seabed, China will play an important role in achieving the China's energy strategy and the goals of carbon peaking and carbon neutrality. However, traditional depressurization, thermal stimulation, and CO2 replacement methods will face significant challenges when applied to methane-hydrate (MH) bearing clayey silty sand and sandy clay in Qiongdongnan basin, China. This article summarizes the current research status at home and abroad in recent years from three aspects: 1. the macroscopic and microscopic mechanical behaviors of hydrates bearing sediments and their relationships under complex multi-field and multi-process conditions together with phase-changes of hydrates; 2. theoretical and multi-scale numerical analysis methods of simulating the multi-field, multi-phase, multi-process coupling effects in the MH reservoir at all the stages of deep sea energy geotechnical engineering; 3. green, efficient, and safe MH exploitation methods and adaptability evaluation. Problems and limitations of existing have been explored. It is necessary to employ a new approach combining the depressurization, thermal stimulation, CO2 replacement/injection, and other measures to increase gas production, carbon sequestration, and engineering safety to realize the green, efficient, and all-stages safe exploitation of MH in the Qiongdongnan seabed, China.
百度学术
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