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低渗透砂岩裂缝孔隙度、渗透率与应力场理论模型研究

冯建伟 戴俊生 刘美利

冯建伟, 戴俊生, 刘美利, 2011. 低渗透砂岩裂缝孔隙度、渗透率与应力场理论模型研究. 地质力学学报, 17 (4): 303-311.
引用本文: 冯建伟, 戴俊生, 刘美利, 2011. 低渗透砂岩裂缝孔隙度、渗透率与应力场理论模型研究. 地质力学学报, 17 (4): 303-311.
FENG Jian-wei, DAI Jun-sheng, LIU Mei-li, 2011. THEORETICAL MODEL ABOUT FRACTURE POROSITY, PERMEABILITY AND STRESS FIELD IN THE LOW-PERMEABILITY SANDSTONE. Journal of Geomechanics, 17 (4): 303-311.
Citation: FENG Jian-wei, DAI Jun-sheng, LIU Mei-li, 2011. THEORETICAL MODEL ABOUT FRACTURE POROSITY, PERMEABILITY AND STRESS FIELD IN THE LOW-PERMEABILITY SANDSTONE. Journal of Geomechanics, 17 (4): 303-311.

低渗透砂岩裂缝孔隙度、渗透率与应力场理论模型研究

基金项目: 

国家重大科技专项“渤海湾盆地东营凹陷勘探成熟区精细评价示范工程” 2008ZX05051

详细信息
    作者简介:

    冯建伟(1979-), 男, 汉族, 山东临朐人, 副教授, 主要从事构造地质学研究。E-mail:UPC_ fengjw@yahoo.com.cn, fengjw@yahoo.com.cn

  • 中图分类号: TE122.2+3

THEORETICAL MODEL ABOUT FRACTURE POROSITY, PERMEABILITY AND STRESS FIELD IN THE LOW-PERMEABILITY SANDSTONE

  • 摘要: 低渗透砂岩储集层普遍发育裂缝, 裂缝不仅是重要的流体渗流通道, 而且在油井周围的发育程度直接影响着油井的生产能力.目前裂缝定量化预测方面存在的焦点问题是:缺乏一个有效而合理的力学模型, 裂缝渗透性的求取方法仍处于半定量化, 不具通用性.以史深100块沙三中储集层为目标, 从应力场和裂缝主要参数的关系入手, 以裂缝开度为桥梁, 通过实验和理论推导的方法, 建立了构造应力场和裂缝孔隙度、渗透率之间的定量关系模型.在岩石力学参数测试结果和地质模型建立的基础上, 对目的层裂缝发育时期的古构造应力和现今地应力进行数值模拟, 将结果代入关系模型, 计算研究区裂缝孔隙度和渗透率的空间分布, 进而指导低渗透砂岩油藏的裂缝参数定量预测、产能规划及井网部署.

     

  • 图  1  σ1-σ3切面裂缝真实间距和视间距的关系

    Figure  1.  Relationship between the real spacing and apparent spacing of the fractures in σ1-σ3 shear plane

    图  2  裂缝主平面和应力主平面示意图

    Figure  2.  A sketch map showing the main fracture plane and main stress plane

    图  3  史深100块古应力场和现今应力场最大主应力(σ1)空间分布

    Figure  3.  Spatial distribution of maximum principal stress (σ1) in palaeostress field and present stress field in Block Shishen 100

    图  4  史深100块沙三中3古应力场与现今应力场下裂缝开度分布

    Figure  4.  Fracture opening distribution under palaeostress field and present stress field in Block Shishen 100

    图  5  史深100块沙三中3现今应力场下裂缝孔隙度分布及X方向裂缝渗透率分布

    Figure  5.  Distributions of fracture porosity and permeability in X-direction under present stress field in Block Shishen 100

    表  1  裂缝计算开度、线密度和实测开度、线密度对比

    Table  1.   Comparison of calculated opening and linear density with measured opening and linear density

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出版历程
  • 收稿日期:  2011-06-16
  • 刊出日期:  2011-12-01

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