新疆石油地质

新疆石油地质 ›› 2011, Vol. 32 ›› Issue (5): 487-488.

• 油气勘探 • 上一篇    下一篇

鄂尔多斯盆地苏10区块地应力与储集层裂缝分布

郭鹏1, 李春林1, 哈文雷2   

  1. 1.辽宁工程技术大学力学与工程学院,辽宁阜新 123000;
    2.中国石油长城钻探工程有限公司,北京 100101
  • 收稿日期:2011-01-08 出版日期:2011-10-01 发布日期:2020-08-19
  • 作者简介:郭鹏（1984-）,男,山西晋城人,硕士,构造地质,（Tel）13604988672（E-mail）tumuguopeng@163.com.

Reservoir Stress and Fracture Distributions of Su-10 Block in Ordos Basin

GUO Peng1, LI Chun-lin1, HA Wen-lei2   

  1. 1. School of Mechanics and Engineering, Liaoning Technical University, Fuxin, Liaoning, 123000, China;
    2. Greatwall Drilling Engineering Company Ltd, CNPC, Beijing, 100101, China
  • Received:2011-01-08 Online:2011-10-01 Published:2020-08-19

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摘要： 在分析区域构造应力场特征的基础上,根据有限元法的基本理论,建立了苏10 区块合理的地质、力学模型。通过地应力场的数值模拟,给出目的层的最大水平主应力、最小水平主应力、最大剪应力、平均应力和形变能等值线分布图。根据“三维等效张应力（σT）”、“破裂值（I）”和“单位体积的应变能（u）”3 个评价指标得出综合评价系数（R综）,根据R综得出的构造裂缝发育区与高产气井及钻井岩心裂缝的吻合程度较高。

关键词: 鄂尔多斯盆地, 苏10区块, 应力场, 储集层裂缝, 三维有限元

Abstract: This paper analyzes the regional tectonic stress field characteristics in Ordos basin, develops the reasonable geological and mechanical model of its Su-10 block based on the finite element basic theory, and presents the maximum horizontal principal stress, minimum horizontal principal stress, maximum shear stress, mean stress and deformation energy contour distribution diagram of the target zone by numerical simulation of the earth stress field. The evaluation indices such as "3-D equivalent tensile stress (σT)", "crack value (I)" and " strain energy per volume (u)" are applied to get composite assessment factor (Rc) for quantitative description of the fracture development. It is indicated that the zones with developed structural fractures are more accordant with the results of the high-yield gas wells and the drilled core fracture description.

Key words: Ordos basin, Su-10 block, stress field, reservoir fracture, 3-D finite element

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