Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2019, Vol. 55 ›› Issue (4): 643-653.DOI: 10.13209/j.0479-8023.2019.020

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Research of Crustal Stress Simulation Using Finite Element Analysis Based on Corner Point Grid

LIU Yuyang1,2, LIU Shiqi1,2, PAN Mao1,2,†, LEI Zhengdong3   

  1. 1. Key Laboratory of Orogenic Belts and Crustal Evolution (MOE), School of Earth and Space Sciences, Peking University, Beijing 100871
    2. Institute of Oil & Gas, Peking University, Beijing 100871

    3. Research Institute of Petroleum Exploration and Development, China National Petroleum Corporation, Beijing 100083

  • Received:2018-05-15 Revised:2018-06-12 Online:2019-07-20 Published:2019-07-20
  • Contact: PAN Mao, E-mail: panmao(at)pku.edu.cn

基于三维角点网格模型的现今地应力有限元模拟

刘钰洋1,2, 刘诗琦1,2, 潘懋1,2,†, 雷征东3   

  1. 1. 北京大学地球与空间科学学院造山带与地壳演化教育部重点实验室, 北京 100871 2. 北京大学石油与天然气研究中心, 北京 100871 3. 中国石油勘探开发研究院, 北京100083
  • 通讯作者: 潘懋, E-mail: panmao(at)pku.edu.cn
  • 基金资助:
    国家科技重大专项(2017ZX05013-002)和中国石油勘探开发研究院科技专项(RIPED-2016-JS-276)资助

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Abstract:

The development of stress finite element analysis approach based on 3D corner-point grid can establish accurate crustal stress field. Firstly, corner-point grid is employed to establish the detailed structure and attribute model of reservoir. Secondly, grid conversion algorithm is applied to convert corner-point grid to corresponding finite-element grid. Then, finite element analysis is used to get attribute model based on finite-element grid which reflects the distribution of crustal stress. Lastly, grid conversion algorithm is operated to reverse the attribute model to another format which is based on corner-point grid for subsequent analysis. Thus, the procedure continuity and data consistency has been proved by this approach. Furthermore, real data collected from oilfield X and Y are employed to simulate stress distribution and the validity and accuracy of the proposed approach can be verified by comparison between simulation results and real data.

Key words: crustal stress, corner-point grid, finite-element grid, grid conversion

摘要：

设计并实现三维角点网格模型的现今地应力有限元模拟方法。利用角点网格, 建立储层三维精细模型。应用网格转换算法, 将网格转换为对应的三维有限元网格模型, 采用有限元法模拟地应力场的分布。采用网格转换逆向方法, 将模型重新采样至对应的角点网格地质模型, 为后续数值模拟等流程提供数据支持, 从而保证流程的连续性和数据的一致性。通过X工区和Y工区两个油田实例数据, 模拟工区应力场分布。对比分析表明, 模拟值与实测值匹配性较好, 证明了方法的准确性和有效性。

关键词: 地应力, 角点网格, 有限元网格, 网格转换

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