目前,水力壓裂是油氣田優(yōu)化開發(fā)階段提高頁巖氣產量的重要科學方法。在本研究中,對裸眼及射孔完井儲層的應力分布進行了討論。在考慮烴類流體對井壁的作用力和壓裂液滲流的影響后,建立了射孔井井壁應力場的分布模型。解釋了應力集中產生的影響及注水井的應力分布模型。利用該數(shù)學模型加上控制變量法,計算了井壁的切應力、垂直應力和最大周向應力,為現(xiàn)場壓裂施工提供了理論依據(jù)。其次,利用數(shù)學模型描述了四種裂縫耦合模式以及其發(fā)生的判別條件。分析了裂縫交點處的應力狀態(tài),計算了切應力、法向應力和接近角之間的關系。最后,通過ABAQUS有限元數(shù)值模擬軟件,分析了水力裂縫和天然裂縫在不同接進近角度下裂縫的擴展情況,驗證了前人的理論成果,對現(xiàn)場施工具有一定的指導意義。 

【文章來源】：中國地質大學(北京)北京市 211工程院校 教育部直屬院校

【文章頁數(shù)】：69 頁

【學位級別】：碩士

【文章目錄】：
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


【參考文獻】：
期刊論文
[1]層狀頁巖巖石力學特性及其脆性評價[J]. 王洪建,劉大安,黃志全,袁廣祥,呂曉春,牛晶蕊,趙子江,石曉閃.  工程地質學報. 2017(06)
[2]頁巖儲集層脆性研究進展[J]. 張晨晨,董大忠,王玉滿,蔣珊,管全中.  新疆石油地質. 2017(01)
[3]層理性頁巖氣儲層復雜網絡裂縫數(shù)值模擬研究[J]. 李玉梅,呂煒,宋杰,李軍,楊宏偉,于麗維.  石油鉆探技術. 2016(04)
[4]川東南彭水地區(qū)龍馬溪組頁巖孔隙結構特征[J]. 王亮,陳云燕,劉玉霞.  中國石油勘探. 2014(05)
[5]三維空間中水力裂縫穿透天然裂縫的判別準則[J]. 程萬,金衍,陳勉,徐彤,張亞坤,刁策.  石油勘探與開發(fā). 2014(03)
[6]中國石化非常規(guī)油氣資源潛力及勘探進展[J]. 馬永生,馮建輝,牟澤輝,趙培榮,包書景,王烽.  中國工程科學. 2012(06)
[7]隨機裂縫性儲層壓裂特征實驗研究[J]. 陳勉,周健,金衍,張廣清.  石油學報. 2008(03)
[8]裸眼完井下的大位移井裂縫起裂研究[J]. 周代余,郭建春,趙金洲,鄧燕.  西南石油學院學報. 2002(06)



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