南海北部陆坡深水区浅层天然气藏特征  

The characteristics of shallow gas reservoir developed in the northern continental slope of South China Sea

作　　者：钟广见[1,2] 张如伟[1,2] 易海[1,2] 冯常茂[1,2] 赵忠泉[1,2] ZHONG Guangjian;ZHANG Ruwei;YI Hai;FENG Changmao;ZHAO Zhongquan(Key Laboratory of Marine Mineral Resources,Ministry of Land and Resources,Guangzhou 510760,China;Guangzhou Marine Geological Survey,Guangzhou 510760,China)

机构地区：[1]国土资源部海底矿产资源重点实验室,广东广州510760 [2]广州海洋地质调查局,广东广州510760

出　　处：《热带海洋学报》2018年第3期80-85,共6页Journal of Tropical Oceanography

基　　金：中国地质调查局专项(DD20160154)~~

摘　　要：南海北部陆坡深水区的浅层天然气藏是一种伴随天然气水合物的新型油气藏,具有埋藏浅、规模大的特点,其埋藏深度一般小于300m。浅层天然气藏由深部裂解气沿断裂上升被天然气水合物封盖而形成,识别似海底反射(BSR)是寻找浅层天然气藏有效方法。浅层天然气藏的气源主要有热解气、生物气和混合气,陆坡张性断裂是气体运移的主要通道,水合物下部的砂层是浅层天然气藏的主要储集层,水合物层则是封盖层。从南海发现的天然气水合物分布特征看,浅层天然气藏在陆坡深水区广泛分布且气藏厚度大,潜在资源量非常可观,是一种新型的开采成本相对低廉的油气藏。The shallow gas reservoir in the northern deep water area of the South China Sea(SCS)is a new type of oil-gas reservoir associated with gas hydrate,which has the characteristics of shallow burial and large scale,and its burial depth is generally less than 300 m.The shallow gas reservoir was formed by the gas hydrate cap in the deep cracking gas along the fault,and the identification of bottom simulating reflector is an effective method to find the shallow gas reservoir.The gas sources mainly include:pyrolysis gas,biogas and mixture.Slope tensile rupture is a major channel for gas migration,a sand layer at the bottom of the hydrate is the main reservoir of shallow gas accumulation,and the hydrate layer is blocked.Looking from gas hydrate distribution characteristics found in the SCS,shallow gas reservoir,widely distributed in slope deep-water area,with big reservoir thickness,and potentially significant resources,is a new type of reservoir while mining costs are relatively low.

关 键 词：浅层天然气藏 天然气水合物 陆坡 似海底反射(BSR) 南海 

分 类 号：P736[天文地球—海洋地质]