Liang Lixi, Xiong Jian, Liu Xiangjun. Effects of hydration swelling and wettability on propagation mechanism of shale formation crack[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2014, 36(6): 780-786. doi: 10.11781/sysydz201406780
Citation: Liang Lixi, Xiong Jian, Liu Xiangjun. Effects of hydration swelling and wettability on propagation mechanism of shale formation crack[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2014, 36(6): 780-786. doi: 10.11781/sysydz201406780

Effects of hydration swelling and wettability on propagation mechanism of shale formation crack

doi: 10.11781/sysydz201406780
  • Received Date: 2013-10-27
  • Rev Recd Date: 2014-08-18
  • Publish Date: 2014-11-28
  • The shale formation cracks have an important influence on the borehole stability of shale well, and the interaction between drilling fluidand shale (capillary effect and hydration swelling) would impact on the propagation mechanism of shale formation crack. In this thesis, experiments were done for the outcrop and well core of the Longmaxi Formation shale of the southern Sichuan Basin to determine shale wettability and hydration swelling. Based on fracture mechanics, the propagation model of shale formation crack was established with the hydration swelling stress and capillary force, and the effects of hydration swelling and wettability on the propagation mechanism of shale formation crack were studied. The result shows that the wettability of the Longmaxi Formation shale is both water-wet and oil-wet, and is more likely to be oil-wet. The hydration swelling stress of the shale tend to ascent first and then become stable with the increase in time. For the shale rocks first soak in oil or KCl, the rise velocity of hydration swelling stress would decrease.The fractures on the sample surface are parallel plane of bedding in the process of immersing in water. With the increasing of immersion time, the sample would keep its integrality or spall to pieces. While the number of the fractures soaking in KCl is less and the cracked degree of the rocks is lighter. The hydration swelling has a great influence on the increment of the stress intensity factor, and the drilling fluid systems need to decrease the drilling fluid filter loss and increase the clay minerals hydrate inhibitor. The wetting behavior has a great influence on the propagation mechanism, and the drilling fluid systems need to reduce the drilling fluid interfacial tension and enlarge the wetting angle between drilling fluid and rock medium. The contact angles of oil-based drilling fluids and shale surface and the interfacial tension are little, which result in small capillary force. Therefore, the oil-based drilling fluid is used to inhibit crack propagation, hence the wellbore will be easy to maintain stable.

     

  • loading
  • [1]
    胡文瑞,翟光明,李景明.中国非常规油气的潜力和发展[J].中国工程科学,2010,12(5):25-29. Hu Wenrui,Zhai Guangming,Li Jingming.Potential and development of unconventional hydrocarbon resources in China[J].Engineering Sciences,2010,12(5):25-29.
    [2]
    Chee P T,Brian G R.Effects of swelling and hydration stress in shale on wellbore stability.SPE38057,1997.
    [3]
    马丽,倪文学,丁丰虎.胜北构造硬脆性泥页岩裂隙特征及防塌机理[J].西安石油学院学报,1999,14(4):26-29. Ma Li,Ni Wenxue,Ding Fenghu.Fracture character and collapse mechanism of the hard brittle mud shale in Shengbei structure[J] Journal of Xi'an Petroleum Institute,1999,14(4):26-29.
    [4]
    赵峰,唐洪明,孟英峰,等.微观地质特征对硬脆性泥页岩井壁稳定性影响与对策研究[J].钻采工艺,2007,30(6):16-18. Zhao Feng,Tang Hongming,Meng Yingfeng,et al.Study on the influence of microscopic geologic characteristics on wellbore stability of brittle shale[J].Drilling & Production Technology,2007,30(6):16-18.
    [5]
    刘玉石,白家祉,黄荣樽,等.硬脆性泥页岩井壁稳定问题研究[J].石油学报,1998,19(1):85-88. Liu Yushi,Bai Jiachi,Huang Rongzun,et al.A study on stability of brittles shale wellbore[J].Acta Petrolei Sinica,1998,19(1):85-88.
    [6]
    王倩,王刚,蒋宏伟,等.泥页岩井壁稳定耦合研究[J].断块油气田,2012,19(4):517-521. Wang Qian,Wang Gang,Jiang Hongwei,et al.Study on shale wellbore stability coupling[J].Fault-Block Oil and Gas Field,2012,19(4):517-521.
    [7]
    周德华,焦方正.页岩气"甜点"评价与预测:以四川盆地建南地区侏罗系为例[J].石油实验地质,2012,34(2):109-114. Zhou Dehua,Jiao Fangzheng.Evaluation and prediction of shale gas sweet spots:a case study in Jurassic of Jiannan area,Sichuan Basin [J].Petroleum Geology & Experiment,2012,34(2):109-114.
    [8]
    温庆志,翟恒立,罗明良,等.页岩气藏压裂支撑剂沉降及运移规律实验研究[J].油气地质与采收率,2012,19(6):104-107. Wen Qingzhi,Zhai Hengli,Luo Mingliang,et al.Study on proppant settlement and transport rule in shale gas fracturing[J].Petroleum Geology and Recovery Efficiency,2012,19(6):104-107.
    [9]
    石秉忠,夏柏如,林永学,等.硬脆性泥页岩水化裂缝发展的CT成像与机理[J].石油学报,2012,33(1):137-142. Shi Bingzhong,Xia Bairu,Lin Yongxue,et al.CT imaging and mechanism analysis of crack development by hydration in hard-brittle shale formations[J].Acta Petrolei Sinica,2012,33(1):137-142.
    [10]
    邱正松,李健鹰.硬脆性页岩坍塌机理的实验研究[J].钻井液与完井液,1989,6(2):26-31. Qiu Zhengsong,Li Jianying.Experiment study of hardbrittle shale wellbore instability mechanism[J].Drilling Fluid & Completion Fluid,1989,6(2):26-31.
    [11]
    龙鹏宇,张金川,唐玄,等.泥页岩裂缝发育特征及其对页岩气勘探和开发的影响[J].天然气地球科学,2011,22(3):525-532. Long Pengyu,Zhang Jinchuan,Tang Xuan,et al.Feature of muddy shale fissure and its effect for shale gas exploration and development[J].Natural Gas Geoscience,2011,22(3):525-532.
    [12]
    丁文龙,李超,李春燕,等.页岩裂缝发育主控因素及其对含气性的影响[J].地学前缘,2012,19(2):212-220. Ding Wenlong,Li Chao,Li Chunyan,et al.Dominant factor of fracture development in shale and its relationship to gas accumulation[J].Earth Science Frontiers,2012,19(2):212-220.
    [13]
    郭海萱,郭天魁.胜利油田罗家地区页岩储层可压性实验评价[J].石油实验地质,2013,35(3):339-346. Guo Haixuan,Guo Tiankui.Experimental evaluation of crushability of shale reservoirs in Luojia area,Shengli Oilfield[J].Petroleum Geology & Experiment,2013,35(3):339-346.
    [14]
    孙海成.脆性页岩网络裂缝中支撑剂的沉降特性[J].油气地质与采收率,2013,20(5):107-110. Sun Haicheng.Study on proppant settlement in brittle shale network fracture[J].Petroleum Geology and Recovery Efficiency,2013,20(5):107-110.
    [15]
    折海成,刘斌,华帅,等.裂缝吸水对泥页岩强度的影响[J].辽宁化工,2010,39(8):854-857. She Haicheng,Liu Bin,Hua Shuai,et al.Effect of hygroscope of split on mud shale strength[J]Liaoning Chemical Industry,2010,39(8):854-857.
    [16]
    石秉忠,夏柏如.硬脆性泥页岩水化过程的微观结构变化[J].大庆石油学院学报,2011,35(6):28-34. Shi Bingzhong,Xia Bairu.The variation of microstructures in the hard-brittle shale hydration process[J]Journal of Daqing Petroleum Institute,2011,35(6):28-34.
    [17]
    石秉忠,夏柏如,高书阳,等.页岩自吸水化控制剂的研制与性能评价[J].石油钻探技术,2012,40(5):45-49. Shi Bingzhong,Xia Bairu,Gao Shuyang,et al.Development and performance evaluation of shale self-adsorption hydration inhibi-tor[J]Petroleum Drilling Techniques,2012,40(5):45-49.
    [18]
    王怡,徐江,梅春桂,等.含裂缝的硬脆性泥页岩理化及力学特性研究[J].石油天然气学报,2011,33(6):104-108. Wang Yi,Xu Jiang,Mei Chungui,et al.Chemical and mechanical properties of brittle fracture mud shale[J]Journal of Oil and Gas Technology,2011,33(6):104-108.
    [19]
    卢运虎,陈勉,安生.页岩气井脆性页岩井壁裂缝扩展机理[J].石油钻探技术,2012,40(4):13-16. Lu Yunhu,Chen Mian,An Sheng.Brittle shale wellbore fracture propagation mechanism[J]Petroleum Drilling Techniques,2012,40(4):13-16.
    [20]
    张正顺,胡沛青,沈娟,等.四川盆地志留系龙马溪组页岩矿物组成与有机质赋存状态[J].煤炭学报,2013,38(5):766-771. Zhang Zhengshun,Hu Peiqing,Shen Juan,et al.Mineral compositions and organic matter occurrence modes of Lower Silurian Longmaxi Formation of Sichuan Basin[J] Journal of China Coal Society,2013,38(5):766-771.
    [21]
    黄金亮,邹才能,李建忠,等.川南志留系龙马溪组页岩气形成条件与有利区分析[J].煤炭学报,2012,37(5):782-787. Huang Jinliang,Zou Caineng,Li Jianzhong,et al.Shale gas accumulation conditions and favorable zones of Silurian Longmaxi Formation in south Sichuan Basin,China[J].Journal of China Coal Society,2012,37(5):782-787.
    [22]
    闫传梁,邓金根,蔚宝华,等.页岩气储层井壁坍塌压力研究[J].岩石力学与工程学报,2013,32(8):1595-1602. Yan Chuanliang,Deng Jin'gen,Yu Baohua,et al.Research on collapsing pressure of gas shale[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(8):1595-1602.
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Article Metrics

    Article views (1386) PDF downloads(774) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return