基于MSC MARC的三维构造应力场数值模拟与裂缝预测——以宝浪油田宝北区块为例

基金项目:

国家自然科学基金 49972068

NUMERICAL SIMULATION OF THE TECTONIC STRESS FIELD AND FORECASTING OF FRACTURES BASED ON MSC MARC

1.
School of Earth Sciences, China University of Geosciences, Wuhan 430074, Hubei, China
2.
Huazhong Tectonomechanical Research Center, Wuhan 430074, Hubei, China
3.
Henan Research Institute of Petroleum Exploration and Development, Nanyang 473132, Henan, China
4.
School of Resources, China University of Geosciences, Wuhan 430074, Huibei, China

摘要: MSC MARC的高度非线性有限元分析能力与强大的二次开发接口为复杂三维地质数值模型的建立与三维构造应力模拟与非线性分析提供了有力工具; 并可以通过二次开放子程序建立复杂的岩石本构与破裂准则。本文基于MSC MARC建立了新疆焉耆盆地宝浪油田宝北区块背斜构造三维有限元模型并进行了构造应力模拟分析和裂缝预测。裂缝预测结果与实际动态资料十分吻合。
- MSC MARC /
- 构造应力场 /
- 数值模拟 /
- 裂缝预测
Abstract: MSC MARC is a nonlinear FEA program.Its ability of highly nonlinear finite element analysis and good secondary development interface enable us to construct a complicated 3D geological numerical model and perform 3D tectonic stress modeling and nonlinear analysis, and complex constitutive equations and fracture critera of rocks can be established by secondary open subroutines.Based on the finite element analysis software MSC MARC.a 3D finite elemant model of the Baobei anticline the Yanqi basin, Xinjiang, is established, and the simulation analysis of the tectonic stress field and fracture forecasting are performed.The predicted regions with high-density fractures are in agreement to the real case.
- MSC MARC /
- tectonic stress field /
- numerical simulation /
- forecasting of fractures

图 1 宝北背斜构造形态与断层组合简图

Figure 1. Combination of faults and shape of the Baobei anticline

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图 2 宝北背斜构造三维有限元网格模型

Figure 2. 3D finite element mesh model of the Baobei anticline

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图 3 目的层三维构造应力场三维等值云图

Figure 3. 3D contour of the tectonic stress field of the target horizon

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图 4 三维构造应力场切片等值云图

Figure 4. 3D slice cloud contour of the tectonic stress field of the target horizon

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图 5 目的层预测裂缝密度等值线图

Figure 5. Contours of fracture density of the target horizon

下载: 全尺寸图片幻灯片

表 1 数值模拟模型分层力学参数

Table 1. Mechanical parameters of the numerical simulation model

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