青海天然气水合物的特征及其开发约束

Features and their constraints on exploitation of gas hydrates in Qinghai permafrost

运用综合分析的方法初步研究了青海陆域天然气水合物的开发方法,认为天然气水合物特性以及其赋存的地质、地理条件制约着开发利用.可以通过采用安全可靠的具有针对性的技术有效开发陆域天然气水合物藏;木里地区天然气水合物采用CO2置换法为主导的开采方法是可行的.可以从开发前缜密筹划,加大勘探力度,开发新方法,制定法律法规,编制应急预案,开发中控制和严密监测工程过程等措施,防止或降低天然气水合物开发过程中的风险和损失.

Using comprehensive analysis method,the exploitation process is preliminary studied.The characteristics,geological and geographical conditions of gas hydrate in Qinghai permafrost have restricts on its exploitation and utilization.First of all,safe and dependable exploitation technique should be adopted to exploit the continental gas hydrate effectively,and replacement of CH4 from hydrate with CO2 may be an available method to exploit the gas hydrate in Muli area.In order to avoid or decrease the potential environmental risk and achieve benefits of gas hydrate exploitation,we should design carefully,prospect hardly,research new method,legislate,and formulate emergency preparatory scheme before the exploitation,and control and monitor the engineering process in the exploitation.