Study on Formation Mechanism of Fracture Network after Fract
发布时间：2021-01-15 17:03
目前,水力压裂是油气田优化开发阶段提高页岩气产量的重要科学方法。在本研究中,对裸眼及射孔完井储层的应力分布进行了讨论。在考虑烃类流体对井壁的作用力和压裂液渗流的影响后,建立了射孔井井壁应力场的分布模型。解释了应力集中产生的影响及注水井的应力分布模型。利用该数学模型加上控制变量法,计算了井壁的切应力、垂直应力和最大周向应力,为现场压裂施工提供了理论依据。其次,利用数学模型描述了四种裂缝耦合模式以及其发生的判别条件。分析了裂缝交点处的应力状态,计算了切应力、法向应力和接近角之间的关系。最后,通过ABAQUS有限元数值模拟软件,分析了水力裂缝和天然裂缝在不同接进近角度下裂缝的扩展情况,验证了前人的理论成果,对现场施工具有一定的指导意义。
【文章来源】：中国地质大学(北京)北京市 211工程院校 教育部直属院校
【文章页数】：69 页
【学位级别】：硕士
【文章目录】：
Abstract
摘要
1 INTRODUCTION
1.1 Research Purpose and Significance
1.2 Local and International Research Status
1.2.1 Research of Fracture Interaction in Shale Gas Reservoir
1.2.2 Research of Crack Propagation Mechanism at Local and International
1.3 Problems
1.4 Research Content and Technical Route
1.4.1 Research Contents
1.4.2 Methodology
2 SHALE RESERVOIR PROPERTY ANALYSIS
2.1 Shale Mineral Composition
2.2 Mechanical Parameters of Shale
2.2.1 Elastic Modulus and Poisson's Ratio of Shale
2.2.2 Shale Fracture Pressure
2.2.3 Cohesion and Internal Friction Angle of Shale
2.3 Brittleness Evaluation of Shale
2.3.1 Elastic Parameter Method
2.3.2 Mineral Composition Method
2.4 Summary of the Chapter
3 DISTRIBUTION OF STRESS FIELD IN RESERVOIR ROCK
3.1 Rock Stress Analysis of Reservoir
3.2 Stress Field Analysis of Open-hole Wellbore
3.2.1 In-situ Stress Component Produces Wellbore Stress
3.2.2 Compressive Stress of Rock Caused by Fluid in Wellbore
3.2.3 Stress due to Seepage Loss of Fracturing Fluid
3.2.4 Distribution of Stress Field around Open Hole Wellbore
3.3 Distribution model of stress field around perforated wellbore
3.3.1 Wellbore Stress Distribution in Perforated Wells
3.4 Example calculation
3.5 Summary of the chapter
4.INTERACTION OF HYDRAULIC AND NATURAL FRACTURES
4.1 The Interaction Modes of Fractures
4.1.1 Fracture Interaction mode1
4.1.2 Fracture Interaction mode2
4.1.3 Fracture Interaction mode3
4.1.4 Fracture Interaction mode4
4.2 Stress Analysis of Crack Intersection
4.2.1 Stress State at the Intersection of the First Crack Coupling Mode
4.2.2 Stress State at the Intersection of the Second Crack Coupling Mode
4.2.3 Stress State at the Intersection of the Third Crack Coupling Mode
4.2.4 Stress State at the Intersection of the Fourth Crack Coupling Mode
4.3 Example Calculation
4.4 Summary of the Chapter
5.CRACK PROPAGATION MODELING AND MODEL OPTIMIZATION
5.1 Finite Eelement Simulation
5.1.1 Establishment of Finite Element Model
5.1.2 Grid Generation
5.1.3 Apply Load and Calculations
5.1.4 Model Results and Processing
5.2 Analytical Results of Modeling
5.3 Summary
6.CONCLUSION
ACKNOWLEDGEMENT
REFERENCES
【参考文献】：
期刊论文
[1]层状页岩岩石力学特性及其脆性评价[J]. 王洪建,刘大安,黄志全,袁广祥,吕晓春,牛晶蕊,赵子江,石晓闪. 工程地质学报. 2017(06)
[2]页岩储集层脆性研究进展[J]. 张晨晨,董大忠,王玉满,蒋珊,管全中. 新疆石油地质. 2017(01)
[3]层理性页岩气储层复杂网络裂缝数值模拟研究[J]. 李玉梅,吕炜,宋杰,李军,杨宏伟,于丽维. 石油钻探技术. 2016(04)
[4]川东南彭水地区龙马溪组页岩孔隙结构特征[J]. 王亮,陈云燕,刘玉霞. 中国石油勘探. 2014(05)
[5]三维空间中水力裂缝穿透天然裂缝的判别准则[J]. 程万,金衍,陈勉,徐彤,张亚坤,刁策. 石油勘探与开发. 2014(03)
[6]中国石化非常规油气资源潜力及勘探进展[J]. 马永生,冯建辉,牟泽辉,赵培荣,包书景,王烽. 中国工程科学. 2012(06)
[7]随机裂缝性储层压裂特征实验研究[J]. 陈勉,周健,金衍,张广清. 石油学报. 2008(03)
[8]裸眼完井下的大位移井裂缝起裂研究[J]. 周代余,郭建春,赵金洲,邓燕. 西南石油学院学报. 2002(06)
本文编号：2979187
【文章来源】：中国地质大学(北京)北京市 211工程院校 教育部直属院校
【文章页数】：69 页
【学位级别】：硕士
【文章目录】：
Abstract
摘要
1 INTRODUCTION
1.1 Research Purpose and Significance
1.2 Local and International Research Status
1.2.1 Research of Fracture Interaction in Shale Gas Reservoir
1.2.2 Research of Crack Propagation Mechanism at Local and International
1.3 Problems
1.4 Research Content and Technical Route
1.4.1 Research Contents
1.4.2 Methodology
2 SHALE RESERVOIR PROPERTY ANALYSIS
2.1 Shale Mineral Composition
2.2 Mechanical Parameters of Shale
2.2.1 Elastic Modulus and Poisson's Ratio of Shale
2.2.2 Shale Fracture Pressure
2.2.3 Cohesion and Internal Friction Angle of Shale
2.3 Brittleness Evaluation of Shale
2.3.1 Elastic Parameter Method
2.3.2 Mineral Composition Method
2.4 Summary of the Chapter
3 DISTRIBUTION OF STRESS FIELD IN RESERVOIR ROCK
3.1 Rock Stress Analysis of Reservoir
3.2 Stress Field Analysis of Open-hole Wellbore
3.2.1 In-situ Stress Component Produces Wellbore Stress
3.2.2 Compressive Stress of Rock Caused by Fluid in Wellbore
3.2.3 Stress due to Seepage Loss of Fracturing Fluid
3.2.4 Distribution of Stress Field around Open Hole Wellbore
3.3 Distribution model of stress field around perforated wellbore
3.3.1 Wellbore Stress Distribution in Perforated Wells
3.4 Example calculation
3.5 Summary of the chapter
4.INTERACTION OF HYDRAULIC AND NATURAL FRACTURES
4.1 The Interaction Modes of Fractures
4.1.1 Fracture Interaction mode1
4.1.2 Fracture Interaction mode2
4.1.3 Fracture Interaction mode3
4.1.4 Fracture Interaction mode4
4.2 Stress Analysis of Crack Intersection
4.2.1 Stress State at the Intersection of the First Crack Coupling Mode
4.2.2 Stress State at the Intersection of the Second Crack Coupling Mode
4.2.3 Stress State at the Intersection of the Third Crack Coupling Mode
4.2.4 Stress State at the Intersection of the Fourth Crack Coupling Mode
4.3 Example Calculation
4.4 Summary of the Chapter
5.CRACK PROPAGATION MODELING AND MODEL OPTIMIZATION
5.1 Finite Eelement Simulation
5.1.1 Establishment of Finite Element Model
5.1.2 Grid Generation
5.1.3 Apply Load and Calculations
5.1.4 Model Results and Processing
5.2 Analytical Results of Modeling
5.3 Summary
6.CONCLUSION
ACKNOWLEDGEMENT
REFERENCES
【参考文献】：
期刊论文
[1]层状页岩岩石力学特性及其脆性评价[J]. 王洪建,刘大安,黄志全,袁广祥,吕晓春,牛晶蕊,赵子江,石晓闪. 工程地质学报. 2017(06)
[2]页岩储集层脆性研究进展[J]. 张晨晨,董大忠,王玉满,蒋珊,管全中. 新疆石油地质. 2017(01)
[3]层理性页岩气储层复杂网络裂缝数值模拟研究[J]. 李玉梅,吕炜,宋杰,李军,杨宏伟,于丽维. 石油钻探技术. 2016(04)
[4]川东南彭水地区龙马溪组页岩孔隙结构特征[J]. 王亮,陈云燕,刘玉霞. 中国石油勘探. 2014(05)
[5]三维空间中水力裂缝穿透天然裂缝的判别准则[J]. 程万,金衍,陈勉,徐彤,张亚坤,刁策. 石油勘探与开发. 2014(03)
[6]中国石化非常规油气资源潜力及勘探进展[J]. 马永生,冯建辉,牟泽辉,赵培荣,包书景,王烽. 中国工程科学. 2012(06)
[7]随机裂缝性储层压裂特征实验研究[J]. 陈勉,周健,金衍,张广清. 石油学报. 2008(03)
[8]裸眼完井下的大位移井裂缝起裂研究[J]. 周代余,郭建春,赵金洲,邓燕. 西南石油学院学报. 2002(06)
本文编号：2979187
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