珠江口盆地白云凹陷天然气水合物与浅层气识别及成藏控制因素  

Identification and accumulation control factors of natural gas hydrate and shallow gas in Baiyun sag,Pearl River Mouth basin

作　　者：颜承志 施和生 李元平 李杰 朱焱辉 王秀娟[3] YAN Chengzhi;SHI Hesheng;LI Yuanping;LI Jie;ZHU Yanhui;WANG Xiujuan(CNOOC China Limited,Shenzhen Branch,Shenzhen,Guangdong 518054,China;CNOOC China Limited,Department of Exploration,Beijing 100010,China;Institute of Oceanology,Chinese Academy of Sciences,Qingdao,Shandong 266071,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518054 [2]中海石油(中国)有限公司勘探部,北京100010 [3]中国科学院海洋研究所,山东青岛266071

出　　处：《中国海上油气》2018年第6期25-32,共8页China Offshore Oil and Gas

基　　金：国家高技术研究发展计划(863计划)课题"南海北部天然气水合物目标评价与钻探取样(编号:2013AA092601)"部分研究成果

摘　　要：珠江口盆地已进行大量水合物钻探,是水合物研究的热点区域。结合白云凹陷研究区三维地震数据、均方根振幅属性切片和相干属性切片等资料的综合分析,在典型地震剖面上识别了强振幅异常、似海底反射、块体搬运沉积、空白反射带、多边形断层及局部构造高地等特征,认为识别的气烟囱、正断层、多边形断层等与发现的珠海组气层相连通,且强振幅异常可以反映水合物在该区的分布。结合钻井资料对水合物及浅层气成藏的控制因素进行了分析,认为白云凹陷研究区发现的天然气水合物及浅层气的分布主要受深部气藏和流体运移通道影响,深部热成因气为气藏的重要气体来源,流体运移通道主要包括起源于下部气藏的气烟囱、正断层以及浅层渗透性地层。A large number of hydrate drilling has been carried out in the Pearl River Mouth basin,which is a hot spot for hydrate research.In combination with the comprehensive analysis of 3D seismic data,root mean square amplitude attribute slice and coherent attribute slice in the study area of Baiyun sag,features such as high amplitude anomalies,bottom simulating reflection,mass transport deposits,blank reflection bands,polygonal faults and local structural high part were identified on the typical seismic profiles,and it was considered that the identified gas chimneys,normal faults,polygonal faults,etc.are connected with the discovered gas layers in Zhuhai Formation,and the strong amplitude anomalies can reflect the distribution of hydrates in this area.In combination with the drilling data,controlling factors of hydrate and shallow gas accumulation were analyzed.It is believed that the distribution of hydrates and shallow gas found in the study area of Baiyun sag is mainly affected by deep gas reservoirs and fluids migration channels;the deep thermogenic gas is an important source of gas reservoirs,and the fluids migration channels mainly include gas chimneys,normal faults and shallow permeability formations originating from the lower gas reservoirs.

关 键 词：白云凹陷 天然气水合物 浅层气 特征识别 成藏控制因素 热成因气 流体运移通道 

分 类 号：TE122.1[石油与天然气工程—油气勘探]