基于细观损伤多相耦合的砂砾岩水力压裂裂缝扩展数值模拟

余东合; 徐康泰; 车航; 张登文; 刘国华; 马新仿

doi:10.13639/j.odpt.2016.03.015

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基于细观损伤多相耦合的砂砾岩水力压裂裂缝扩展数值模拟

余东合, 徐康泰, 车航, 张登文, 刘国华, 马新仿

文章导航 > 石油钻采工艺 > 2016 > 38(3): 352-358

余东合, 徐康泰, 车航, 张登文, 刘国华, 马新仿. 基于细观损伤多相耦合的砂砾岩水力压裂裂缝扩展数值模拟[J]. 石油钻采工艺, 2016, 38(3): 352-358. doi: 10.13639/j.odpt.2016.03.015

引用本文:

YU Donghe, XU Kangtai, CHE Hang, ZHANG Dengwen, LIU Guohua, MA Xinfang. Numerical simulation on hydraulic fracture propagation in glutenite reservoir based on microscopic damage multiphase coupling[J]. Oil Drilling & Production Technology, 2016, 38(3): 352-358. doi: 10.13639/j.odpt.2016.03.015

Citation:

YU Donghe, XU Kangtai, CHE Hang, ZHANG Dengwen, LIU Guohua, MA Xinfang. Numerical simulation on hydraulic fracture propagation in glutenite reservoir based on microscopic damage multiphase coupling[J]. Oil Drilling & Production Technology, 2016, 38(3): 352-358. doi: 10.13639/j.odpt.2016.03.015

基于细观损伤多相耦合的砂砾岩水力压裂裂缝扩展数值模拟

doi: 10.13639/j.odpt.2016.03.015

1.
中国石油华北油田分公司采油工程研究院
2.
中国石油大学北京石油工程学院

详细信息

中图分类号: TE357.1

Numerical simulation on hydraulic fracture propagation in glutenite reservoir based on microscopic damage multiphase coupling

1.
Oil Production Engineering Research Institute of Huabei Oilfield Company, CNPC, Renqiu, Hebei 062552, China
2.
College of Petroleum Engineering of China University of Petroleum Beijing, Beijing 102249, China

摘要: 低渗透砂砾岩油藏水力压裂裂缝扩展机理及其数值模拟研究，对该类储层压裂改造成功实施具有重要意义。将砂砾岩储层中砾石表征为基质- 交界面- 砾石的三模态结构，假定砾石分布与几何尺寸及储层物性满足随机分布，结合Moter-Carolo 方法，完成砂砾岩储层数学表征；考虑储层渗流场、应力场、水化膨胀湿度场的三相耦合特征，结合损伤力学、断裂力学等原理，利用细观损伤有限元的方法，建立了砂砾岩储层水力压裂裂缝扩展数学模型，并进行数值模拟研究。模拟分析了不同主应力差、基质- 砾石交界面强度、砾石强度情况下，水力裂缝遇砾石扩展情况，并最终实现砂砾岩储层水力裂缝动态扩展数值模拟。研究表明，水力裂缝遇砾发生绕砾、穿砾、止裂现象，并以绕砾扩展为主，且裂缝发生明显转向，存在羽状次生裂缝；裂缝转向程度和裂缝延伸长度与主应力差、砾石强度以及交界面强度有关，主要表现有：水平主应力差越小，水力裂缝遇砾转向越明显；基质- 砾石交界面强度增加，水力裂缝明显变短，并难以转向；随着砾石强度的增大，裂缝的转向程度增大。
- 砂砾岩储层 /
- 水力裂缝扩展 /
- 多相耦合 /
- 细观损伤 /
- 数值模拟
Abstract: The numerical simulation on hydraulic fracture propagation in low permeability glutenite oil reservoir is of great significance to the successful fracturing stimulation of this reservoir. By characterizing the gravel in the glutenite reservoir as a matrixinterface-gravel three modal textures, and assuming that the gravel distribution, geometry and reservoir property meet the random distribution, the mathematical characterization of glutenite reservoir was completed with the Moter-Carolo method. Taking into account the tri-phase coupling of reservoir seepage field, stress field and hydration propagation moisture field, and according to the principles of damage mechanics and fracture mechanics, the microscopic damage finite element method was used to establish a mathematical model of hydraulic fracture propagation in glutenite reservoir. This mathematical model was used to simulate and analyze the hydraulic fracture propagation when the fractures encounter gravels under different principal stress differences, matrix-gravel interface strengths and gravel strengths. Finally, numerical simulation of dynamic propagation of hydraulic fractures in glutenite reservoir was completed. The study results show that some phenomena such as bypassing, passing through and arresting occur when hydraulic fracture encounters gravels.Especially, propagation through bypassing gravel predominates. The fracture apparently diverts, and pinnate secondary fractures occur.The fracture diverting level and penetration are related to the principal stress difference, gravel strength and interface strength. Essentially,the smaller the horizontal principal stress, the more apparent the diversion of hydraulic fracture when it encounters gravels. As the matrix-gravel interface strength increases, the hydraulic fracture apparently shortens and is difficult to divert. As the gravel strength increases, the diverting level of fractures increases.
- glutenite reservoir /
- hydraulic fracture propagation /
- multiphase coupling /
- microscopic damage /
- numerical simulation

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基于细观损伤多相耦合的砂砾岩水力压裂裂缝扩展数值模拟

doi: 10.13639/j.odpt.2016.03.015

1. 中国石油华北油田分公司采油工程研究院

2. 中国石油大学北京石油工程学院

收稿日期: 2019-05-21
修回日期: 2019-05-21
刊出日期: 2016-07-11

中图分类号: TE357.1

关键词:

摘要: 低渗透砂砾岩油藏水力压裂裂缝扩展机理及其数值模拟研究，对该类储层压裂改造成功实施具有重要意义。将砂砾岩储层中砾石表征为基质- 交界面- 砾石的三模态结构，假定砾石分布与几何尺寸及储层物性满足随机分布，结合Moter-Carolo 方法，完成砂砾岩储层数学表征；考虑储层渗流场、应力场、水化膨胀湿度场的三相耦合特征，结合损伤力学、断裂力学等原理，利用细观损伤有限元的方法，建立了砂砾岩储层水力压裂裂缝扩展数学模型，并进行数值模拟研究。模拟分析了不同主应力差、基质- 砾石交界面强度、砾石强度情况下，水力裂缝遇砾石扩展情况，并最终实现砂砾岩储层水力裂缝动态扩展数值模拟。研究表明，水力裂缝遇砾发生绕砾、穿砾、止裂现象，并以绕砾扩展为主，且裂缝发生明显转向，存在羽状次生裂缝；裂缝转向程度和裂缝延伸长度与主应力差、砾石强度以及交界面强度有关，主要表现有：水平主应力差越小，水力裂缝遇砾转向越明显；基质- 砾石交界面强度增加，水力裂缝明显变短，并难以转向；随着砾石强度的增大，裂缝的转向程度增大。

English Abstract

Numerical simulation on hydraulic fracture propagation in glutenite reservoir based on microscopic damage multiphase coupling

1. Oil Production Engineering Research Institute of Huabei Oilfield Company, CNPC, Renqiu, Hebei 062552, China

2. College of Petroleum Engineering of China University of Petroleum Beijing, Beijing 102249, China

Received Date: 2019-05-21
Rev Recd Date: 2019-05-21
Publish Date: 2016-07-11

Keywords:

Abstract: The numerical simulation on hydraulic fracture propagation in low permeability glutenite oil reservoir is of great significance to the successful fracturing stimulation of this reservoir. By characterizing the gravel in the glutenite reservoir as a matrixinterface-gravel three modal textures, and assuming that the gravel distribution, geometry and reservoir property meet the random distribution, the mathematical characterization of glutenite reservoir was completed with the Moter-Carolo method. Taking into account the tri-phase coupling of reservoir seepage field, stress field and hydration propagation moisture field, and according to the principles of damage mechanics and fracture mechanics, the microscopic damage finite element method was used to establish a mathematical model of hydraulic fracture propagation in glutenite reservoir. This mathematical model was used to simulate and analyze the hydraulic fracture propagation when the fractures encounter gravels under different principal stress differences, matrix-gravel interface strengths and gravel strengths. Finally, numerical simulation of dynamic propagation of hydraulic fractures in glutenite reservoir was completed. The study results show that some phenomena such as bypassing, passing through and arresting occur when hydraulic fracture encounters gravels.Especially, propagation through bypassing gravel predominates. The fracture apparently diverts, and pinnate secondary fractures occur.The fracture diverting level and penetration are related to the principal stress difference, gravel strength and interface strength. Essentially,the smaller the horizontal principal stress, the more apparent the diversion of hydraulic fracture when it encounters gravels. As the matrix-gravel interface strength increases, the hydraulic fracture apparently shortens and is difficult to divert. As the gravel strength increases, the diverting level of fractures increases.

引用本文:

Citation:

YU Donghe, XU Kangtai, CHE Hang, ZHANG Dengwen, LIU Guohua, MA Xinfang. Numerical simulation on hydraulic fracture propagation in glutenite reservoir based on microscopic damage multiphase coupling[J]. Oil Drilling & Production Technology, 2016, 38(3): 352-358. doi: 10.13639/j.odpt.2016.03.015