石油学报 ›› 2015, Vol. 36 ›› Issue (s1): 50-58.DOI: 10.7623/syxb2015S1006

• 地质勘探 • 上一篇    下一篇

黏弹性裂缝诱导各向异性介质地震波场传播特征——以束鹿凹陷沙河街组三段下亚段泥灰岩储层为例

白旭明1, 张以明2, 杜启振3, 唐传章2, 赵学松2, 王泽丹2, 袁胜辉1, 张舒1, 明锦2   

  1. 1. 中国石油集团东方地球物理勘探有限责任公司 河北涿州 072751;
    2. 中国石油华北油田公司 河北任丘 062552;
    3. 中国石油大学地球科学与技术学院 山东青岛 266580
  • 收稿日期:2015-03-15 修回日期:2015-08-10 出版日期:2015-11-30 发布日期:2015-12-09
  • 通讯作者: 杜启振,男,1969年9月生,1991年获石油大学(华东)学士学位,2003年获清华大学博士学位,现为中国石油大学(华东)地球科学与技术学院教授、博士生导师,主要从事弹性波传播与反演等工作。Email:dqz@upc.edu.cn
  • 作者简介:白旭明,男,1969年10月生,1991年获石油大学(华东)学士学位,现为中国石油集团东方地球物理勘探有限责任公司华北物探处总工程师、高级工程师,主要从事地震数据采集等工作。Email:834499681@qq.com
  • 基金资助:

    国家自然科学基金项目(No.41174100,No.41074087)和中国石油天然气股份有限公司重大科技专项(2014E-035)资助。

Seismic wave field propagation characteristics of viscoelastic fracture-induced anisotropic medium:a case study of calcilutite reservoirs in the lower part of Member 3 of Shahejie Formation, Shulu sag

Bai Xuming1, Zhang Yiming2, Du Qizhen3, Tang Chuanzhang2, Zhao Xuesong2, Wang Zedan2, Yuan Shenghui1, Zhang Shu1, Ming Jin2   

  1. 1. CNPC Geophysical Company Limited, Hebei Zhuozhou 072751, China;
    2. PetroChina Huabei Oilfield Company, Hebei Renqiu 062552, China;
    3. School of Geosciences, China University of Petroleum, Shandong Qingdao 266580, China
  • Received:2015-03-15 Revised:2015-08-10 Online:2015-11-30 Published:2015-12-09

摘要:

广泛发育裂缝的泥灰岩储层具有复杂的黏弹性和各向异性性质,使得地震波在其中的传播机理尚不完全清楚,这成为制约该类储层油气勘探取得进一步突破的重要因素。综合考虑裂缝储层的各向异性与黏弹性性质,利用Kelvin-Voigt黏弹性模型、线性滑动裂缝模型与Hudson模型,构建了黏弹性各向异性裂缝性储层等效介质模型;采用旋转交错网格有限差分算法近似计算空间导数,同时采用复频移递归积分非分裂PML边界条件来吸收边界反射,进而对所建立的等效介质模型的地震波场进行数值模拟。研究结果显示地震波传播特征受基质Q值、裂缝充填流体、裂缝体密度及裂缝倾角与方位角等参数的影响。

关键词: 泥灰岩储层, 黏弹性, 各向异性, 裂缝, 正演模拟

Abstract:

Calcilutite reservoirs with wide development of fissures have complex viscoelastic and anisotropic properties, leading to a vague understanding of seismic wave propagation mechanism, which has become an important factor to restrict further breakthroughs in hydrocarbon exploration in this type of reservoir. In comprehensive consideration of viscoelastic and anisotropic properties of fissure reservoirs, an equivalent medium model was established for viscoelastic-anisotropic fissure reservoirs using Kelvin-Voigt viscoelastic model, linear sliding fissure model and Hudson model. The rotated staggered grid finite-difference algorithm was adopted for approximate calculation of spatial derivative. Meanwhile, the complex frequency shift recursive integral NPML boundary condition was utilized to absorb boundary reflection, so as to perform numerical simulation on seismic wave of equivalent medium model. Research results demonstrate that the seismic wave propagation characteristics are influenced by matrix Q value, filling fluids, volume density, dip angle and azimuth of fissures and other parameters.

Key words: calcilutite reservoirs, viscoelasticity, anisotropy, fissure, forward modeling

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