吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (5): 1466-1476.doi: 10.13278/j.cnki.jjuese.20180255

• 地球探测与信息技术 • 上一篇    下一篇

基于模拟退火粒子群优化算法的裂缝型储层各向异性参数地震反演

罗腾1, 冯晅1, 郭智奇1, 刘财1, 刘喜武2,3,4   

  1. 1. 吉林大学地球探测科学与技术学院, 长春 130026;
    2. 页岩油气富集机理与有效开发国家重点实验室, 北京 100083;
    3. 中国石化页岩油气勘探开发重点实验室, 北京 100083;
    4. 中国石化石油勘探开发研究院, 北京 100083
  • 收稿日期:2018-10-08 发布日期:2019-10-10
  • 通讯作者: 郭智奇(1980-),男,教授,博士生导师,主要从事岩石物理、地震各向异性、油气储层预测等研究,E-mail:guozhiqi@jlu.edu.cn E-mail:guozhiqi@jlu.edu.cn
  • 作者简介:罗腾(1989-),男,博士研究生,主要从事地震各向异性正反演研究,E-mail:autumn2009lt@126.com
  • 基金资助:
    国家"十三五"重大专项（2017ZX05049-002）；国家自然科学基金石油化工联合基金项目（U1663207）；国家自然科学基金项目（41430322）

Seismic Inversion of Anisotropy Parameters of Fractured Reservoirs by Simulated Annealing and Particle Swarm Optimization

Luo Teng1, Feng Xuan1, Guo Zhiqi1, Liu Cai1, Liu Xiwu2,3,4   

  1. 1. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China;
    2. National Key Laboratory of Corporation of Shale Oil/Gas Enrichment Mechanism and Effective Development, Beijing 100083, China;
    3. SinoPEC Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China;
    4. SinoPEC Petroleum Exploration and Production Research Institute, Beijing 100083, China
  • Received:2018-10-08 Published:2019-10-10
  • Supported by:
    Supported by National Key Projects During the 13th Five-Year Plan of China (2017ZX05049-002), NSFC and SinoPEC Joint Key Project (U1663207) and National Natural Science Foundation of China (41430322)

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摘要： 发育垂直定向排列裂缝的地下岩石可等效为具有水平对称轴的横向各向同性（horizontal transverse isotropic，HTI）介质。针对HTI介质模型，本文研究了裂缝型储层的各向异性参数地震振幅随方位角变化（amplitude variations with azimuth，AVAZ）的反演方法。首先，在地震AVAZ反演流程中，提出采用模拟退火粒子群优化算法实现裂缝型储层各向异性参数反演。之后，通过理论模型测试，验证了基于模拟退火粒子群优化算法的地震AVAZ反演的有效性。最后，将反演方法应用于四川盆地龙马溪组页岩气储层实际方位地震数据；在反演之前先利用傅里叶级数方法估计裂缝方位并对实际数据进行方位校正，以提供更准确的输入数据；通过计算得到的P波、S波各向异性参数可用于评价裂缝发育程度。反演结果表明，研究区域构造顶部裂缝较发育，与地质基本理论一致，验证了反演方法的合理性。

关键词: HTI, 裂缝, 储层, 各向异性, 地震AVAZ, 反演, 四川盆地, 页岩气

Abstract: Underground rocks with vertical aligned fractures can be equivalent to horizontal transversely isotropic (HTI) media. For HTI medium model, the authors studied the inversion method to estimate anisotropic parameter using the seismic amplitude varying with azimuth (AVAZ) of fractured reservoirs. Firstly, in the seismic AVAZ inversion process, the simulated annealing particle swarm optimization algorithm was proposed to invert the anisotropic parameters of fractured reservoirs; then, the validity of seismic AVAZ inversion based on simulated annealing particle swarm optimization algorithm was verified by theoretical model test; finally, the inversion method was applied to the field azimuth seismic data of Longmaxi shale gas reservoir in Sichuan basin. Before inversion, the Fourier series method was used to estimate the fracture orientation and correct the field data to provide more accurate input data. The anisotropic parameters of P and S waves obtained by calculation can be used to evaluate the degree of fracture development. The inversion results show that the fractures on the top of the study area are well developed, which is consistent with the basic geological theory. It verifies the rationality of the inversion method and proves that the inversion results can provide a basis for reservoir fracture identification.

Key words: HTI, fracture, reservoirs, anisotropy, seismic AVAZ, inversion, Sishuan basin, shale gas

中图分类号: 

  • P631.4
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