基于ANSYS的断层安全性评价方法及应用——以苏北盆地东台坳陷白驹含水层储气库为例

雷鸣; 王丹丹; 邱小松; 路世伟; 邓庆杰; 李攀; 闵文茂; 刘泞玮

doi:10.11781/sysydz202205904

基于ANSYS的断层安全性评价方法及应用——以苏北盆地东台坳陷白驹含水层储气库为例

doi: 10.11781/sysydz202205904

雷鸣^{1, 2, 3,},
王丹丹^4, ,,
邱小松⁵,
路世伟^{1, 2, 3},
邓庆杰⁶,
李攀⁷,
闵文茂⁷,
刘泞玮¹

1.
长江大学城市建设学院, 湖北荆州 434023
2.
长江大学油气地下储库研究中心, 湖北荆州 434023
3.
湖北省油气储运工程技术研究中心, 湖北荆州 434023
4.
长江大学经济与管理学院, 湖北荆州 434023
5.
中国石油勘探开发研究院, 北京 100089
6.
长江大学地球科学学院, 武汉 430100
7.
中冶(上海)钢结构科技有限公司, 上海 201900

基金项目:

中国石油创新基金项目 2017D-5007-0604

中国石油勘探开发研究院开放项目 RZPED-LFFY-2019-J5451

详细信息

作者简介:
雷鸣(1974-), 男, 博士, 副教授/高级经济师, 从事油气储运工程、储气库风险管理研究。E-mail: 88456455@qq.com

通讯作者:
王丹丹(1981-), 女, 硕士, 讲师, 从事数据分析研究。E-mail: 723737529@qq.com

中图分类号: TE319.2
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- 文章访问数: 609
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- 被引次数: 0
出版历程
- 收稿日期: 2022-02-21
- 修回日期: 2022-07-06
- 刊出日期: 2022-09-28

Evaluation method for fault safety and its application based on ANSYS: a case study of Baiju aquifer gas storage in Dongtai Depression, Subei Basin

LEI Ming^{1, 2, 3
,},
WANG Dandan^{4
, ,},
QIU Xiaosong⁵,
LU Shiwei^{1, 2, 3},
DENG Qingjie⁶,
LI Pan⁷,
MIN Wenmao⁷,
LIU Ningwei¹

1.
School of Urban Construction, Yangtze University, Jingzhou, Hubei 434023, China
2.
Research Center of Underground Oil and Gas Storage, Yangtze University, Jingzhou, Hubei 434023, China
3.
Hubei Oil and Gas Storage and Transportation Engineering Technology Research Center, Jingzhou, Hubei 434023, China
4.
Economic and Management School, Yangtze University, Jingzhou, Hubei 434023, China
5.
PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100089, China
6.
School of Geosciences, Yangtze University, Wuhan, Hubei 430100, China
7.
China Metallurgical (Shanghai) Steel Structure Technology Limited Company, Shanghai 201900, China

摘要

摘要: 含水层储气库利用多孔介质储层储蓄天然气，选址的地理范围较广，不依赖于大型盐矿或者衰竭油气藏，对我国天然气战略具有重大意义。含水层储气库通过天然断层封堵天然气、固井技术实现周期性注采，达到调节季节性峰值的目的，受注采压力变化的影响，运行过程断层容易开启或破裂，导致天然气泄漏。因此，含水层储气库断层安全性评价至关重要，而常见的断层评价和数值模拟方法没有涉及到多孔介质储层，对其膨胀机理研究尚浅，不适合用于含水构造的断层安全性评价。基于含水层储气库的基本特征，借助ANSYS有限元模拟和静态力学分析总结出一套完整的断层安全性评价方法。以苏北盆地东台坳陷大丰—兴化探区白驹储气地质体为例，构建出地层—断层的3D实体模型，根据初始应力平衡分析和断层岩石样本的轴压实验论证模型的有效性，通过位移约束法模拟不同运行压力条件下目标断层的应力状态，预测运行压力的极限值为29.50 MPa，超过该值断层可能发生拉张破坏。
- ANSYS /
- 含水层储气库 /
- 断层 /
- 安全性评价
Abstract: Aquifer gas storage uses porous media reservoir to store natural gas. The location of aquifer gas storage has a wide geographical range and does not depend on large salt mines or depleted oil and gas reservoirs, which is of great significance to China's natural gas strategy. Aquifer gas storage realizes periodic injection-production through natural fault blocking natural gas and cementing technology, so as to achieve the purpose of adjusting seasonal peak value. Affected by the change of injection-production pressure, faults are easy to be opened or broken during operation, leading to the leakage of natural gas stored. Therefore, it is very important to evaluate the fault safety of aquifer gas storage, but the common fault evaluation and numerical simulation methods do not involve the porous media reservoir, and the study of its expansion mechanism is insufficient, which does not satisfy the fault safety evaluation of water-bearing structure. Based on the basic characteristics of aquifer gas storage, this paper summarizes a set of complete fault safety evaluation methods by ANSYS finite element simulation and static mechanics analysis. A case study was carried out in Baiju aquifer gas storage in the Dongtai Depression of the Subei Basin. A 3D entity model of formation and fault was established. According to the initial stress equilibrium analysis and the axial compression experiments of fault rock samples, the validity of the model can be demonstrated. With displacement constraint method, the stress state of target faults at different operating pressure was simulated. The maximum value of predicted operating pressure is 29.50 MPa, and tensile failure may occur above this value.
- ANSYS /
- aquifer gas storage /
- fault /
- safety evaluation

HTML全文

图 1 断层安全性评价思路

Figure 1. Diagram for fault safety evaluation

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图 2 苏北盆地东台坳陷大丰—兴化探区构造

Figure 2. Structural map of Dafeng-Xinghua exploration area, Dongtai Depression, Subei Basin

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图 3 苏北盆地东台坳陷大丰—兴化探区层序地层综合划分柱状图

据文献[20]修改。

Figure 3. Comprehensive division of sequence stratigraphy in Dafeng-Xinghua exploration area, Dongtai Depression, Subei Basin

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图 4 地层T₂⁰数据处理效果

Figure 4. Processing of data of stratum T₂⁰

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图 5 初步地层—断层实体模型

Figure 5. Preliminary stratum-fault entity model

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图 6 优化后断层模型

Figure 6. Optimized fault model

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图 7 优化后地层—断层模型

Figure 7. Optimized stratum-fault model

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图 8 模型网格划分效果

Figure 8. Division effect of model grid

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图 9 模型初始平衡后地层和断层X/Y/Z轴方向应力云图

Figure 9. Stress nephogram along X/Y/Z axis of strata and fault after initial equilibrium of the model

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图 10 岩石轴压试验应力曲线

Figure 10. Stress curves of rock axial compression test

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图 11 运行压力28.32 MPa和29.90 MPa条件下断层X/Y/Z轴方向应力云图

Figure 11. Stress nephogram along X/Y/Z axis direction of fault at running pressure of 28.32 MPa and 29.90 MPa

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图 12 不同运行压力下断层最小应力变化

Figure 12. Minimum stress variation of fault under different operating pressure

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图 13 运行压力28.35 MPa条件下断层F008的水平方向应力云图

Figure 13. Horizontal stress nephogram of fault F008 with operating pressure of 28.35 MPa

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图 14 运行压力29.90 MPa条件下断层F008的水平方向应力云图

Figure 14. Horizontal stress nephogram of fault F008 with operating pressure of 29.90 MPa

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表 1 模型参数

Table 1. Model parameter

目标层		单元属性	弹性模量/GPa	泊松比	密度/(kg·m^-3)
上覆层(盖层)		SOLID185实体单元	47.82	0.32	2 070
地层	T₂⁰—T₂³		46.62	0.30	2 060
	T₂³—T₃³
	T₃³—T₃⁴
	T₃⁴—T₃⁵
储层	T₃⁵—T₄⁰		44.90	0.28	2 050
下伏层			45.92	0.33	2 090
断层	F008/F022/F023/ F026/F063/F072/ F080/F083/F115		47.62	0.33	2 090

下载: 导出CSV

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