南海北部琼东南盆地大中型气田天然气运聚成藏特征对比及启示  

Comparison and Enlightenment of Typical Accumulation Characteristics of Large Oil and Gas Fields in Qiongdongnan Basin

作　　者：张贺举 高弘毅 程宝庆[1] 高林涛 郭仪 史诗媚 吴其林 ZHANG Heju;GAO Hongyi;CHENG Baoqing;GAO Lintao;GUO Yi;SHI Shimei;WU Qilin(Research Center of Engineering Technology Zhanjiang Branch of CNOOC Energy Development Co.,Ltd.,Zhanjiang 524057,China;College of Petroleum Engineering,Guangdong University of Petrochemical Technology,Maoming 525000,China)

机构地区：[1]中海油能源发展股份有限公司工程技术湛江分公司研究中心,广东湛江524057 [2]广东石油化工学院石油工程学院,广东茂名525000

出　　处：《广东石油化工学院学报》2023年第3期7-12,共6页Journal of Guangdong University of Petrochemical Technology

基　　金：广东省普通高校特色创新项目(2020KTSCX084)。

摘　　要：对浅水区崖城13-1气田群和深水区陵水17-2中央峡谷气田群的烃源条件、储层特征、运移条件、盖层优劣及圈闭类型、成藏模式等进行研究,得出如下结论:①富生烃凹陷是形成大中型气田的主要条件及物质基础,其中,乐东、陵水及松南-宝岛富生烃凹陷是形成深水大中型气田的物质基础及先决条件;②琼东南盆地渐新统崖城组-陵水组(扇、辫状河或潮汐)三角洲-海底扇、下-中中新统(陆架边缘)三角洲-海底扇和上中新统-上新统浊积水道砂-海底扇三套碎屑岩储层,是大中型气田主要储集层,也是天然气勘探目的层。③断拗期海底扇储集体主要集中在宝岛-长昌凹陷中部、乐东凹陷东北部和陵水凹陷及相关区带,这些区域是近期较为现实有利的天然气勘探新区,有望获得深水天然气勘探的新突破。To clarify the geological law of accumulation of large and medium-sized gas fields in the Qiongdongnan Basin and further expand and open new fields of natural gas exploration,this paper focuses on the hydrocarbon sources of the Yacheng 13-1 gas field group in the shallow water area and the Lingshui 17-2 central canyon gas field group in the deep-water area.A systematic analysis and comparison study was carried out on the conditions,reservoir characteristics,migration conditions,pros and cons of caprocks,Type of trap,and accumulation models,and the following important results and understandings were obtained:(1)Hydrocarbon-rich sags are the main source of formation of large and medium-sized gas fields.conditions and material basis,among which,the hydrocarbon-rich sags in Ledong,Lingshui and Songnan-Baodao are the material basis and prerequisite for the formation of deep-water large and medium-sized gas fields;(2)Oligocene Yacheng Formation-Lingshui Formation(fan,Braided river or tidal)delta-subsea fan,Lower-Miocene(shelf edge)delta-subsea fan,and Upper Miocene-Pliocene turbidite channel sand-subsea fan three sets of clastic rock reservoirs,It is the main reservoir of large and medium-sized gas fields and the target layer for natural gas exploration.(3)The subsea fan reservoirs in the fault-deflection period are mainly concentrated in the central part of the Baodao-Changchang sag,the northeastern part of the Ledong sag,the Lingshui sag and related areas.These areas are relatively realistic and favorable new areas for gas exploration in the near future,and are expected to obtain opportunities for deep-water natural gas exploration.

关 键 词：琼东南盆地 陵水17-2 崖城13-1 成藏 大中型气田 

分 类 号：P744.4[天文地球—海洋科学]