岩性油气藏 ›› 2016, Vol. 28 ›› Issue (3): 127–132.doi: 10.3969/j.issn.1673-8926.2016.03.017

• 油气田开发 • 上一篇    下一篇

正演模拟技术在渤海油田 X 井区砂体连通性研究中的应用

张京思,揣媛媛,边立恩   

  1. 中海石油(中国)有限公司天津分公司 渤海石油研究院,天津 300452
  • 出版日期:2016-05-20 发布日期:2016-05-20
  • 第一作者:张京思( 1986- ),女,硕士,主要从事地球物理解释与储层研究工作。 地址:( 300452 )天津市塘沽区 609 信箱渤海石油研究院。 E-mail :zhangjingsi666@163.com 。
  • 基金资助:

    国家重大科技专项“近海隐蔽油气藏勘探技术”(编号: 2011ZX05023-002 )资助

Application of forward modeling to study of sand body connectivity in X well field of Bohai Oilfield

Zhang Jingsi, Chuai Yuanyuan, Bian Li’en   

  1. Bohai Oilfield Research Institute ,Tianjin Branch of CNOOC Company Ltd. ,Tianjin 300452 ,China
  • Online:2016-05-20 Published:2016-05-20

摘要:

受地震资料品质限制及 X 井区辫状河沉积特征的影响,利用常规地震属性分析及 90° 相位转换技术在对该井区新近系馆陶组上部砂体连通性进行识别时存在较大困难,而应用正演模拟技术可识别出砂体的连通性。 具体做法为: ① 以钻井资料和地震资料为基础,依据 X 井区馆陶组上段砂体沉积特征,建立不同的地质模型并进行正演模拟计算; ② 分析模型的地震响应特征,从理论上探讨砂体横向连通性对地震反射特征的影响,并与实际地震波形进行对比分析,确定 X 井区馆陶组上段主力砂体的连通性及砂体边界; ③ 通过钻井结果来验证正演模拟的可靠性。 结果表明,模型正演方法可以实现对地震地质模型的高精度模拟;正演模拟技术作为一种辅助手段,可以有效解决研究区砂体连通性的多解性问题,对勘探阶段砂体连通性研究具有一定的推广和应用价值。

关键词: CO2 驱, 流体非均质性, 复合油藏, 试井模型, 曲线分析

Abstract: Restricted by seismic data quality and influenced by the sedimentary characteristics of braided facies, it is difficult to identify the sand body connectivity of upper Guantao Formation of Neogene in X well field through conventional seismic attribute analysis and 90-degree phase conversion technique. This paper used forward modeling to distinguish the sand body connectivity in the study area. First of all, based on the drilling data and seismic data,this paper built different geologic models according to the sand body sedimentary characteristics of the upper Guantao Formation in X well field, and carried out forward modeling; then analyzed the seismic response characteristics of the models, discussed the influence of sand body lateral connectivity on seismic reflection characteristics,and compared with the actual seismic waveform to confirm the connectivity and the boundary of the main sand bodies in the upper Guantao Formation; finally verified the reliability of the forward modeling by the drilling data.The results show that the forward modeling can realize high precision simulations of geological model, and can effectively solve the multi-solution problem of sand body connectivity as a supplementary means. This technology has a certain value on extension and application for the research on sand body connectivity in exploration stage.

Key words: CO2 flooding, fluid heterogeneity, composite reservoir, pressure transient model, curve analysis

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