摘要
东海西湖凹陷Y地区位于凹陷东侧边缘部位,跨白堤深洼和东部断阶带,地质条件复杂。结合已经发现油气的西湖凹陷斜坡带、中央背斜带的储层发育特征,认为Y地区主要目的层为渐新统花港组和始新统平湖组,沉积岩为主,岩性为砂、泥岩,除此之外还发育火山岩体。主要目的层埋深花港组在2 500 m~5 000 m之间。Y地区存在二维地震资料信噪比、目的层分辨率不够、基底成像不清楚等问题。为精细落实圈闭和岩体描述提高三维地震资料品质,开展了Y地区的三维地震采集设计论证,从分辨率、面元尺寸、时间采样率、偏移孔径、震源、电缆沉放深度等方面进行了详细的论证和分析,提出了适合Y地区的采集参数,此三维地震采集技术的应用表明,实际采集三维地震数据较二维地震数据有较宽的频带,而且资料品质得到较大提高,同相轴连续性、断裂更清晰,信噪比更高。
The Y area of Xihu depression in the East China Sea is located at the eastern edge of the depression,crossing the Baidi deep depression and Dongping fault terrace zone,and the geological conditions are complex.In combination with the reservoir development characteristics of the slope zone and central anticline zone of Xihu Sag,where oil and gas have been found,it is considered that the primary target strata in Y area are the Oligocene Huagang Formation and Eocene Pinghu Formation,which are mainly sedimentary rocks with sandstone and mudstone lithology.In addition,volcanic rocks are also developed.The burial depth of the main target layer in Huagang Formation is between 2500-5000 M.There are some problems in the Y area,such as signal-to-noise ratio of 2D seismic data,insufficient resolution of the target layer,unclear basement imaging,etc.In order to implement trap and rock mass description and improve the quality of 3D seismic data,a 3D seismic acquisition design demonstration in the Y area is carried out.It provides technical support for 3D seismic acquisition.
作者
周静毅
刘宏扬
陈茂根
徐翠娥
ZHOU Jingyi;LIU Hongyang;CHEN Maogen;XU Cuie(Shanghai Offshore Oil&Gas Company of SINOPEC,Shanghai 200120,China;Geophysical exploration branch of Sinopec Offshore Oil Engineering,Shanghai 200135,China)
出处
《物探化探计算技术》
CAS
2024年第1期45-56,共12页
Computing Techniques For Geophysical and Geochemical Exploration
基金
中石化海域重点区三维部署基金(KJ2019-034)。
关键词
西湖凹陷
圈闭落实
采集设计
分辨率
面元
偏移孔径
Xihu depression
trap implementation
acquisition design
resolving power
bin
offset aperture
