恩平组岩性地层圈闭——白云凹陷深水区天然气勘探新领域  

Stratigraphic-lithologic traps in the Enping Formation:a new exploration field in deep water area of the Baiyun sag,Pearl River Mouth basin

作　　者：张功成 陈莹 杨海长 韩银学 赵钊 杨东升 王龙颖 黄萱 

机构地区：[1]中海油研究总院,北京100028

出　　处：《中国海上油气》2015年第6期1-9,共9页China Offshore Oil and Gas

基　　金："十一五";"十二五"国家科技重大专项"海洋深水区油气勘探关键技术(编号:2008ZX05025;2011ZX05025)";国家973项目"南海深水盆地油气资源形成与分布基础性研究(编号:2009CB219400)";国土资源部全国油气资源战略选区调查与评价项目"南海北部陆坡深水海域油气资源战略调查及评价(编号:XQ-2004-05);南海北部深水区天然气资源战略调查及评价项目(编号:XQ-2007-05)"部分研究成果

摘　　要：珠江口盆地白云凹陷虽然已钻探证实是富气凹陷,但目前仍处于油气储量大发现的阶段,需要深入研究其待探明资源潜力,为此对白云凹陷中深层恩平组岩性地层圈闭进行了深入分析。白云凹陷恩平组属于海陆过渡相三角洲—海湾相沉积,其沉积条件形成了适中的砂地比,有利于岩性地层圈闭的发育;目前落实的白云凹陷恩平组潜在岩性地层圈闭共有21个,包括地层超覆、近岸水下扇、滩坝、低位扇、三角洲前缘楔状砂岩体和上倾尖灭砂岩体等6种类型;白云凹陷恩平组发育三角洲煤系烃源岩和陆源海相烃源岩,其潜在的岩性地层圈闭具有自生、自储、自盖的成藏条件,勘探潜力巨大,预测是白云凹陷主力成藏组合,是深水区天然气勘探的主体方向。The Baiyun sag in the Pearl River Mouth basin is gas-rich confirmed by exploration, but it is still in a discovery period and need further research on its exploration potential. The stratigraphic-lithologic traps in the Enping Formation of the Baiyun sag are analyzed to evaluate unproven resources potential. The Enping Formation is deposited in delta-gulf environment and its ratio of sand to shale is beneficial to strati- graphic-lithologic trap occurrence. 21 potential stratigraphic-lithological traps are found in the Enping For- mation, including such 6 types of traps as stratigraphic overlap, nearshore suhaqueous fans, beach-bar, lowstand fan, delta-front wedge sands and updip pinch-out sands. Delta coal-bearing source rocks and ter- rigenous marine facies source rocks develop in the Enping Formation in which the potential stratigraphic- lithologic traps have the accumulation conditions of self-generation, self-reserve and self-sealing and great exploration potential. The Enping Formation forecasted to be a main reservoir play in the Baiyun sag is an important direction of gas exploration in deep water area in the Pearl River Mouth basin.

关 键 词：恩平组 岩性地层圈闭 天然气勘探 深水区 白云凹陷 珠江口盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]