西南石油大学学报(自然科学版)

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浅水三角洲砂体预测的地震属性方法探讨

刘豪1,郭奕杉2 *,赵春晨3,夏越洋1   

  1. 1. 中国地质大学(北京)海洋学院,北京海淀100083;2. 中海石油(中国)有限公司天津分公司,天津塘沽300452;
    3. 陕西延长石油(集团)有限责任公司研究院,陕西西安710075
  • 出版日期:2016-08-01 发布日期:2016-08-01
  • 通讯作者: 郭奕杉,E-mail:493955984@qq.com
  • 基金资助:

    国家科技重大专项(2011ZX05023 002 005)。

Seismic Attribute Analysis of Shallow-water Deltaic Sand Body Prediction

LIU Hao1, GUO Yishan2*, ZHAO Chunchen3, XIA Yueyang1   

  1. 1. School of Ocean Sciences,China University of Geosciences(Beijing),Haidian,Beijing 100083,China
    2. China National Offshore Oilfield Corporation Limited,Tanggu,Tianjin 300452,China
    3. Research Institute of Shaanxi Yanchang Petroleum(Group)Co. Ltd.,Xi′ an,Shaanxi 710075,China
  • Online:2016-08-01 Published:2016-08-01

摘要:

浅水三角洲砂体是渤海海域新近系良好的油气储层,但在新三维地震工区少井条件下浅水三角洲砂体与地震
响应关系有待完善,砂体的精细刻画存在一定困难。在高频层序划分的基础上,针对黄河口凹陷X 工区各准层序组砂
体如何展布的问题,展开了对X 工区明下段下亚段岩性组合与地震属性的对应关系研究,研究中采用正演模拟建立起
砂体地质地球物理模型,然后利用90? 相移后的均方根属性对明下段下亚段pss1 pss11 层序砂体进行了细致刻
画,研究结果表明,地震剖面中振幅的强弱能够直接反映砂体的发育情况,强振幅反映了砂体较厚(或对应复合厚互
层)、中强振幅一般对应大套泥岩夹厚层中等厚度砂岩、弱振幅反映了砂体不发育。砂体预测结果与实钻井对比吻
合良好,说明少井条件下利用特定的地震属性预测浅水三角洲砂体的可行性。

关键词: 高频层序, 地震属性, 砂体刻画, 黄河口地区, 新近系

Abstract:

The shallow-water deltaic sand body is excellent reservoir in Neogene strata of the Bohai Bay. However,as there is a
lack of well data in the new 3D seismic survey,the relation between the shallow-water deltaic sand bodies and seismic responses
is still obscure. It is difficult to depict the sand bodies precisely. In order to discuss the parasequence sand body distribution in
work area X in Huanghekou sag,this paper summarizes the relationship between the lithological combinations and the seismic
attributes in lower Minghuazhen submember ,based on the high-frequency sequences division. Using the seismic forward
modeling,the we establish the geophysical model of sand bodies and depicts the pss1 pss11 level sequence sand bodies of
Minghuazhen submember in a deliberate way,by making use of RMS amplitude attributes of 90? phase conversion seismic
data. The result proves the relationship between the amplitude of seismic profiles and sand body concentration. The high RMS
amplitude figure demonstrates the thick sand bodies(or the corresponding compound thick level). The middle amplitude figure
normally corresponds to massive mudstone clipping thick-middle thick sandstones,and low amplitude figure shows the barely
developed sand bodies. These results match noticeably with the well drilling s data. Therefore,it is feasible to predict the
shallow-water deltaic sand body by using the seismic attributes.

Key words: high-frequency sequence, seismic attributes, sand body depict, Huanghekou area, Neogene

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