摘要
在构造复杂和测井资料少的海域,有效地进行地震反演和储层预测是油气前景评价的关键。针对南黄海盆地白垩系砂岩储层中岩性复杂和物性高度非均质的问题,采用了测井、地震资料联合的稀疏脉冲约束反演方法和构造形态约束下的低频模型构建技术,对二维多道地震数据进行了目标层波阻抗反演处理,并对白垩纪砂岩储层的横向分布进行了追踪预测。结果表明:地震波阻抗剖面能够刻画储层的空间展布特征,表征储层内部物性变化,预测有利储层分布范围;储层预测认为白垩系泰州组发育多层低波阻抗的泥岩生烃层,中间夹两层波阻抗较高的砂层,与钻井资料对比为物性较好的油气储集层。
In the exploration areas with complicated tectonic background and few drilling wells, effective seismic wave impedance inversion processing and reservoir prediction are the keys to offshore oil and gas resource assessment. For the seriously heterogeneous and complex lithologic association of the Cretaceous sandstone reservoirs in the South Yellow Sea Basin, wave impedance inversion processing is performed for 2D multi-trace seismic data, using the methods of seismic-log sparse impulse joint constrained inversion and low-frequency model building technique under the constraints of structural framework. The wave impedance inversion section may depict spatial distribution pattern of the reservoir, show physical changes inside the reservoir and predict the distribution pattern of the prospective reservoir. The reservoir prediction suggests that the Cretaceous Taizhou Formation has a multi-layer mudstone as hydrocarbon source rocks with low wave impedance,and there are two layers of sandstone reservoirs with high wave impedance. Compared with drilling data, it is proved that the sandstone reservoir is valuable.
作者
朱凌霄
吴志强
祁江豪
ZHU Lingxiao;WU Zhiqiang;Qi Jianghao(Bowling Green State University,Bowling Green 43402,Ohio,USA;Key Laboratory of Marine Envirmental Geology,Ministry of Natural Resources,Qingdao Institute of Marine Geology,CGS,Qingdao 266071,China;Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266061,China)
出处
《海洋地质前沿》
CSCD
2018年第6期66-72,共7页
Marine Geology Frontiers
基金
国家自然科学基金(41210005
41606083)
青岛海洋科学与技术国家实验室鳌山科技创新计划(2015ASKJ03)
国家海洋地质专项(DD20160147)
关键词
砂岩储层
储层预测
稀疏脉冲反演
北部坳陷
sandstone reservoir
reservoir forecast
sparse impulse inversion
North Depression