天然气水合物动态成藏理论  

A DYNAMIC THEORY ON NATURAL GAS HYDRATE RESERVOIR FORMATION

作　　者：樊栓狮[1] 关进安[2] 梁德青[2] 宁伏龙[3] 

机构地区：[1]华南理工大学传热强化与过程节能教育部重点实验室 [2]中国科学院广州能源研究所 [3]中国地质大学工程学院,湖北武汉430074

出　　处：《天然气地球科学》2007年第6期819-826,共8页Natural Gas Geoscience

基　　金：中国科学院创新项目(编号:KGCX2-SW-224);国家自然科学基金(编号:90410003);广东省自然科学基金重点(编号:052001130)联合资助

摘　　要：总结了天然气水合物的赋存状态及其分类,从生成和分解速度角度提出了天然气水合物的动态成藏理论,并依据冻土层钻井气体喷溢、海底水合物露头和海底羽状气泡流等实例论证了这种动态成藏理论。指出天然气水合物赋存状态主要有3种类型,即成长型(渗透型、扩散型)、成熟型和消退型,认为我国南海北部陆坡区的西沙海槽、东沙群岛东南坡、台西南盆地、笔架南盆地等区域有可能存在着仍处于发育阶段的渗透型或扩散型水合物层,而青藏高原羌塘盆地则是属于消退型水合物,祁连山地区、准噶尔盆地等的烃类气体泄漏表明在我国西北和东北的冻土带也可能存在着含气水合物层。Classification on natural gas hydrate deposits occurrence is summarized, and a dynamic theory of gas hydrate reservoir formation is put forward. According to this theory, there are three types of reservoirs., growing type （including seeping type and diffusing type）, mature type and regressive type. This theory is demonstrated by three examples： the natural gas blowout when drilling in the permafrost, the hydrate cropouts in the seafloor and the gas bubbles in abyssal plumes. Then, several conclusions are drawn： there maybe exist the seeping and diffusing types of gas hydrate reservoirs which may still be growing in the Xisha trough, Dongsha continental slope of the South China Sea, west and south of Taiwan basin, and Bijianan basin; whereas in the Qiangtang basin of the Qinghai-Tibet plateau may exist the regressive-type gas hydrate deposit. Furthermore, the phenomenon of hydrocarbon gas leaking in the Qilian mountain areas and Junger basin indicates that these areas may ensconce gas hydrate reservoirs.

关 键 词：天然气水合物 储层 分类 动态成藏 理论 

分 类 号：TE122[石油与天然气工程—油气勘探]