录井工程 ›› 2023, Vol. 34 ›› Issue (2): 88-94.doi: 10.3969/j.issn.1672-9803.2023.02.015

• 地质研究 • 上一篇    下一篇

基于拓频的高分辨率多子波地震反演技术在苏X区块的应用

孙颖①, 武刚②, 梁斌③, 李国良①, 房金伟①, 段传丽①   

  1. ①中国石油渤海钻探油气合作开发分公司;
    ②中国石油大港油田公司天津储气库分公司;
    ③中国石油大港油田公司第五采油厂
  • 收稿日期:2023-04-21 出版日期:2023-06-25 发布日期:2023-07-12
  • 作者简介:孙颖 工程师,1986年生,2012年硕士毕业于长江大学地球探测与信息技术专业,现在中国石油渤海钻探油气合作开发分公司从事油藏地质研究工作。通信地址：300457 天津市开发区二大街83号中石油天津大厦。电话：18622939703。E-mail：loverpep@sina.com
  • 基金资助:
    中国石油渤海钻探油气合作开发分公司科研项目“苏X区块未开发区高能河道砂体刻画与潜力评价研究”（编号：2022YQDZ01K）

Application of high resolution multi-wavelet seismic inversion technology based on expanding frequency in Su X block

SUN Ying①, WU Gang②, LIANG Bin③, LI Guoliang①, FANG Jinwei①, DUAN Chuanli①   

  1. ①Oil & Gas Cooperation and Development Company, BHDC, CNPC, Tianjin 300457,China;
    ②Tianjin Gas Storage Company of Petrochina Dagang Oilfield Company, Tianjin 300280,China;
    ③No. 5 Oil Production Plant of PrtroChina Dagang Oilfield Company, Tianjin 300280, China
  • Received:2023-04-21 Online:2023-06-25 Published:2023-07-12

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摘要： 苏里格气田苏X区块沉积储层以砂泥岩薄互层为主,砂体横向变化快,单砂体厚度差异大,储层非均质性强,常规的低分辨率二维地震稀疏脉冲反演无法清晰地展现出砂体的叠置关系。为此采用高分辨率多子波地震反演技术对苏X区块进行储层预测：首先对二维地震数据体进行拓频处理,其次进行测井岩石物理分析和自然伽马拟声波阻抗的可行性分析;然后对拓频后的地震数据体进行分频操作,将各分频体地震数据与钻井现场模型数据结合分别进行贝叶斯反演,反演后的数据体通过分频特征重构技术进行频率域融合,最终得到高分辨率多子波地震反演数据体。采用高分辨率多子波地震反演技术对苏X区块进行储层预测取得良好效果,相对常规稀疏脉冲地震反演,高分辨率多子波地震反演在纵横向分辨率上提升明显,砂体的叠置关系及井间砂体的尖灭展现得更清晰,反演结果更可靠,能够为有利层位的优选和评价提供更符合地质规律的依据。

关键词: 高分辨率, 多子波地震反演, 拓频处理, 岩石物理分析, 自然伽马, 声波阻抗, 分频特征重构技术

Abstract: The sedimentary reservoirs in the Su X block of the Sulige gas field are dominated by thin interbeds of sand and mudstone. The lateral variation of sand bodies is fast, the thickness of single sand bodies varies greatly, the reservoir heterogeneity is strong, and the two-dimensional seismic resolution is low. Conventional sparse pulse inversion cannot clearly show the superposition relationship of sand bodies. Therefore, high resolution multi-wavelet seismic inversion technology is used to predict the reservoir of Su X block. Firstly, the two-dimensional seismic data is processed by expanding frequency. Secondly, the feasibility analysis of logging rock physics analysis and natural gamma simulation acoustic impedance is carried out. Then, the frequency division operation is carried out on the seismic data volume after expanding frequency, and the Bayesian inversion is carried out by combining the seismic data of each frequency division body with the drilling site model data. The inverted data volume is fused in frequency domain by frequency division feature reconstruction technology, and finally the high resolution multi-wavelet seismic inversion data volume is obtained. High resolution multi-wavelet seismic inversion has achieved good results in reservoir prediction of Su X block. Compared with two-dimensional conventional sparse pulse inversion, high resolution multi-wavelet seismic inversion has significantly improved vertical and horizontal resolution. The superposition relationship of sand bodies and the pinch-out of inter-well sand bodies are clearer. The inversion results are more reliable and more in line with geological laws, which can provide a basis for the optimization and evaluation of favorable layers.

Key words: high resolution, multi-wavelet seismic inversion, expanding frequency processing, rock physics analysis, gamma ray, acoustic impedance, frequency division feature reconstruction technology

中图分类号: 

  • TE132.1
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