钻井完井液浸泡弱化页岩脆性机制

康毅力; 佘继平; 林冲; 游利军

doi:10.6052/0459-1879-15-286

钻井完井液浸泡弱化页岩脆性机制

西南石油大学油气藏地质及开发工程国家重点实验室, 成都 610500

基金项目: 国家重点基础研究发展计划(2010CB226705),国家科技重大专项(2011ZX05018-005)资助项目.

详细信息

通讯作者:
佘继平,博士生,主要研究方向:岩石力学、钻井完井液漏失控制等方面研究.E-mail:437290779@qq.com

中图分类号: TE254.1
计量
- 文章访问数: 1008
- HTML全文浏览量: 148
- PDF下载量: 714
出版历程
- 收稿日期: 2015-07-29
- 修回日期: 2016-03-20
- 刊出日期: 2016-05-17

BRITTLENESS WEAKENING MECHANISMS OF SHALE SOAKED BY DRILLING & COMPLETION FLUID

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China

摘要

摘要: 页岩脆性是页岩地层钻井、水力压裂设计的关键参数之一,目前针对钻井过程中工作液浸泡对页岩脆性的影响还未引起关注.通过开展钻井完井液浸泡前后页岩三轴力学实验,利用脆性评价模型分析了页岩脆性变化特征.结果表明,延长组页岩脆性强于龙马溪组页岩;油基和水基钻井完井液浸泡均能导致页岩脆性降低,且油基钻井完井液浸泡后的页岩脆性降低幅度更大;龙马溪组页岩浸泡后脆性减弱幅度较延长组页岩大.页岩脆性弱化机制包括:(1)由层理面胶结强度不同引起的脆性强弱差异;(2)由毛管自吸作用导致的高孔压、高应力强度因子、低临界断裂韧性;(3)由碱液侵蚀导致的页岩溶蚀孔形成及矿物颗粒碎裂;(4)由黏土矿物水化膨胀产生的膨胀应力;(5)由钻井完井液滤液润滑导致的页岩破裂面摩擦系数降低.延长组页岩层理面强度较龙马溪组页岩低,导致延长组页岩脆性强于龙马溪组页岩.其次,和水基钻井完井液相比,油基钻井完井液具有更大的自吸量、更高的pH值、更强的润滑性,因此,油基钻井完井液浸泡降低页岩脆性幅度更大.另外,由于龙马溪组页岩具有更小的润湿角、更强的毛管自吸和碱液侵蚀作用,相同浸泡条件下,龙马溪组页岩脆性降低幅度更大.本研究可为页岩地层钻井液性能优化、井壁稳定控制、水力压裂设计等提供理论指导.
- 页岩 /
- 钻井完井液 /
- 脆性 /
- 微结构破坏 /
- 裂缝
Abstract: Brittleness is one key parameter during drilling and fracturing in shale formations, however, influencing mechanism of soaking by drilling & completion fluid on shale brittleness has not been focused. In this paper, triaxial mechanical tests of shales soaked by fluid were performed; and optimized brittleness evaluation model was employed to evaluate brittleness of shale. Results indicate that the brittleness of Yanchang shale is larger than that of Longmaxi shale, and two kinds of drilling & completion fluid can decrease shale brittleness, in which oil-based drilling & completion fluid reduces shale brittleness more evidently. The reduction of brittleness Longmaxi shale is greater than that of Yanchang shale. It is demonstrated that five factors can weaken the brittleness of shale as follows: (1) Higher strength of bedding plane can lead to lower brittleness; (2) Spontaneous imbibition causes high pore pressure and great stress intensity factor of fractures; (3) Alkali erosion can cause mineral grains crack and dissolution pore; (4) Hydrate swelling of shale results in swelling stress; (5) Lubrication of drilling & completion filtrate results in lower friction coe cient. Yanchang shale has lower bedding plane strength. So the brittleness of Yanchang shale is larger than that of Longmaxi shale; Oil-based drilling & completion fluid has greater imbibition amount, higher pH and stronger lubrication; therefore, brittleness of shales soaked by oil-based drilling & completion fluid decreases more evidently. Besides, Longmaxi shale has smaller contact angle, greater imbibition amount, and stronger alkali erosion, the reduction of brittleness is greater than that of Yanchang shale under the same condition. This work can provide some evidence for drilling and hydraulic fracturing in shale formation.
- shale /
- drilling & completion fluid /
- brittleness /
- microtexture /
- fracture

HTML全文

参考文献(44)

1 中国国土资源部地质调查局. 中国页岩气资源调查报告(2014),2015.6.11. http://www.cgs.gov.cn/xwtzgg/jrgengxin/122749.htm" target="_blank"> http://www.cgs.gov.cn/xwtzgg/jrgengxin/122749.htm (Ministry of Land and Resources of the People's Republic of China Geological Survey. Shale gas resources survey of China (2014),2015.6.11. http://www.cgs.gov.cn/xwtzgg/jrgengxin/122749.htm" target="_blank"> http://www.cgs.gov.cn/xwtzgg/jrgengxin/122749.htm (in Chinese))

2 刘洪林,王红岩,刘人和等. 中国页岩气资源及其勘探潜力分析. 地质学报,2010,84(9):1374-1378 (Liu Honglin,Wang Hongyan,Liu Renhe,et al. China shale gas resources and prospect potential. Acta Geologica Sinica,2010,84(9):1374-1378 (in Chinese))

3 贾承造,郑民,张永峰. 中国非常规油气资源与勘探开发前景. 石油勘探与开发,2012,39(2):129-136 (Jia Chengzao,Zheng Ming,Zhang Yongfeng. Unconventional hydrocarbon resources in China and the prospect of exploration and development.Petroleum Exploration and Development,2012,39(2):129-136 (in Chinese))

4 邹才能,张国生,杨智等. 非常规油气概念、特征、潜力及技术 - 兼论非常规油气地质学. 石油勘探与开发,2013,40(4):385-399 (Zou Caineng,Zhang Guosheng,Yang Zhi,et al. Geological concepts,characteristics,resource potential and key techniques of unconventional hydrocarbon: On unconventional petroleum geology. Petroleum Exploration and Development,2013,40(4):385-399 (in Chinese))

5刘致水,孙赞东. 新型脆性因子及其在泥页岩储集层预测中的应用. 石油勘探与开发,2015,42(1):1-8 (Liu Zhishui,Sun Zandong. New brittleness indexes and their application in shale/clay gas reservoir prediction. Petroleum Exploration and Development,2015,42(1):1-8 (in Chinese))

6 Rickman R, Mullen M, Petre J, et al. A practical use of shale petrophysics for stimulation design optimization: All shale plays are not clones of the Barnett Shale. In: The 2008 SPE Annual Technical Conference and Exhibition, Denver, Colorado, USA, 21-24 September2008

7 Holt RM,Fjær E,Stenebråten JF,et al. Brittleness of shales: relevance to borehole collapse and hydraulic fracturing. Journal of Petroleum Science and Engineering,2015,131:200-209

8 Holt RM,Fjær EM,Nes OM,et al. A shaly look at brittleness. ARMA 11-366,2011

9 李庆辉,陈勉,金衍等. 页岩脆性的室内评价方法及改进. 岩石力学与工程学报,2012,31(8):1680-1685 (Li Qinghui,Chen Mian,Jin Yan,et al. Indoor evaluation method for shale brittleness and improvement. Chinese Journal of Rock Mechanics and Engineering,2012,31(8):1680-1685 (in Chinese))

10 王鹏,纪友亮,潘仁芳等. 页岩脆性的综合评价方法-以四川盆地W 区下志留统龙马溪组为例. 天然气工业,2013,33(12):48-53 (Wang Peng,Ji Youliang,Pan Renfang,et al. A Comprehensive evaluation methodology of shale brittleness:A case study from the Lower Silurian Longmaxi Fm in Block W,Sichuan Basin. Natural Gas Industry,2013,33(12):48-53 (in Chinese))

11 王宇,李晓,武艳芳等. 脆性岩石起裂应力水平与脆性指标关系探讨. 岩石力学与工程学报,2014,33(2):264-275 (Wang Yu,Li Xiao,Wu Yanfang,et al. Research on relationship between crack initiation stress level and brittleness indices for brittle rocks. Chinese Journal of Rock Mechanics and Engineering,2014,33(2):264-275 (in Chinese))

12 林冲. 富有机质页岩脆性评价及井壁失稳控制. [硕士论文]. 成都:西南石油大学,2015 (Lin Chong. Evaluation of organic-rich shale brittleness and wellbore instability control. [Master Thesis]. Chengdu:Southwest Petroleum University,2015 (in Chinese))

13 Hucka V,Das B. Brittleness determination of rocks by different methods. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts,1974,11(10):389-392

14 Altindag R. Correlation of specific energy with rock brittleness concepts on rock cutting. The Journal of the South African Institute of Mining and Metallurgy,2003,103(3):163-171

15刁海燕. 泥页岩储层岩石力学特性及脆性评价. 岩石学报,2013,29(9):3300-3306 (Diao Haiyan. Rock mechanical properties and brittleness evaluation of shale reservoir. Acta Petrologica Sinica,2013,29(9):3300-3306 (in Chinese))

16 Coates DF,Parsons RC. Experimental criteria for classification of rock substances. International Journal of Rock Mechanics and Mining Sciences& Geomechanics Abstracts,1966,3(3):181-189

17 Tarasov B,Potvin Y. Universal criteria for rock brittleness estimation under triaxial compression. International Journal of Rock Mechanics and Mining Sciences,2013,59:57-69

18 周辉,孟凡震,张传庆等. 基于应力-应变曲线的岩石脆性特征定量评价方法. 岩石力学与工程学报,2014,33(6):1114-1122 (Zhou Hui,Meng Fanzhen,Zhang Chuanqing,et al. Quantitative evaluation of rock brittleness based on stress-strain curve. Chinese Journal of Rock Mechanics and Engineering,2014,33(6):1114-1122 (in Chinese))

19 Protodyakonov MM. Mechanical properties and drillability of rocks. In: The 5th Symposium on Rock Mechanics,Twin Cities,USA,1962

20 Yagiz S,Rostami J. Indentation test for the measurement of rock brittleness. ARMA 12-270,2012

21 蒋廷学,卞晓冰,苏瑗等. 页岩可压性指数评价新方法及应用. 石油钻探技术,2014,42(5):16-20 (Jiang Tingxue,Bian Xiaobing, Su Yuan,et al. A new method for evaluating shale fracability index and its application. Petroleum Drilling Techniques,2014,42(5):16-20 (in Chinese))

22 Song L,Wang Y,Li Y. A novel experiment method of evaluating the brittleness of rock. SPE 167730,2014

23 Jaeger JC,Cook NGW,Zimmerman RW. Fundamentals of Rock Mechanics (4th Edn). Blackwell Publ. Press,2007

24 Fjær E,Holt RM,Horsrud P,et al. Petroleum Related Rock Mechanics (2nd Edn): Elsevier. 2008

25 Yang Y,Hiroki S,Hows A,et al. Comparison of brittleness indices in organic rich shale formations. ARMA 13-403,2013

26 Eseme E,Urai JL,Krooss BM,et al. Review of mechanical properties of oil shales: implications for exploitation and basin modeling. Oil Shale,2007,24(2):159-174

27 MokhtariM,Alqahtani AA,Tutuncu AN. Impacts of stress,natural and induced fractures on mechanical properties of organic-rich shales. In: Unconventional Resources Technology Conference,12-14 August,Denver,Colorado,USA,2013

28 胡起,陈小宏,李景叶等. 干酪根对富含有机质页岩弹性性质的影响. 地球物理学进展,2014,29(2):748-753 (Hu Qi,Chen Xiaohong, Li Jingye,et al. The effect of kerogen on the elastic properties of organic-rich shales. Progress in Geophysics,2014,29(2):748-753 (in Chinese))

29 Santarelli FJ,Carminati S. Do shales swell? A critical review of available evidence. In: SPE/IADC Drilling Conference,28 February-2 March,Amsterdam,Netherlands,1995

30 Horsrud P,Bostrøm B,Sønstebø EF,et al. Interaction between shale and water-based drilling fluids: Laboratory exposure tests give new insight into mechanisms and field consequences of KCl contents. In: SPE Annual Technical Conference and Exhibition,27-30 September,New Orleans,Louisiana,1998

31 卢运虎,陈勉,安生. 页岩气井脆性页岩井壁裂缝扩展机理. 石油钻探技术,2012,40(4):13-16 (Lu Yunhu,Chen Mian,An Sheng. Brittle shale wellbore fracture propagation mechanism. Petroleum Drilling Techniques,2012,40(4):13-16 (in Chinese))

32 卢运虎,陈勉,金衍等. 钻井液浸泡下深部泥岩强度特征试验研究. 岩石力学与工程学报,2012,31(7):1399-1405 (Lu Yunhu, Chen Mian,Jin Yan,et al. Experimental study of strength properties of deep mudstone under drilling fluid soaking. Chinese Journal of Rock Mechanics and Engineering,2012,31(7):1399-1405 (in Chinese))

33 康毅力,皇凡生,游利军等. 钻井液浸泡页岩裂缝宽度的模拟及应用. 石油钻采工艺,2014,36(5):41-46 (Kang Yili,Huang Fansheng, You Lijun,et al. Simulation and application of shale fracture width immersed in drilling fluid. Oil Drilling& Production Technology,2014,36(5):41-46 (in Chinese))

34 刘向君,熊健,梁利喜等. 川南地区龙马溪组页岩润湿性分析及影响讨论. 天然气地球科学,2014,25(10):1644-1652 (Liu Xiangjun, Xiong Jian,Liang Lixi,et al. Analysis of the wettability of Longmaxi Formation Shale in the south region of Sichuan Basin and its influence. Natural Gas Geoscience,2014,25(10):1644-1652 (in Chinese))

35梁利喜,熊健,刘向君. 水化作用和润湿性对页岩地层裂纹扩展的影响. 石油实验地质,2014,36(6):780-786 (Liang lixi,Xiong Jian,Liu Xiangjun. Effects of hydration swelling and wettability on propagation mechanism of shale formation crack. Petroleum Geology & Experiment,2014,36(6):780-786 (in Chinese))

36 Li G,Liu H,Meng Y,et al. Challenges in deep shale gas drilling: A case study in Sichuan Basin. In: IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition,2012,9-11 July,Tianjin, China

37 俞杨烽,康毅力,游利军等. 碱液侵蚀:一种泥页岩井壁失稳新机理. 石油学报,2013,34(5):983-988 (Yu Yangfeng,Kang Yili,You Lijun,et al. Alkali corrosion: a new mechanism of shale borehole instability. Acta Petrolei Sinica,2013,34(5):983-988 (in Chinese))

38 You LJ,Kang YL,Chen ZX,et al. Wellbore instability in shale gas wells drilled by oil-based fluids. International Journal of Rock Mechanics and Mining Sciences,2014,72:294-299

39 衡帅,杨春和,郭印同等. 层理对页岩水力裂缝扩展的影响研究. 岩石力学与工程学报,2015,34(2):228-237 (Heng Shuai, Yang Chunhe, Guo Yintong, et al. Influence of bedding planes on hydraulic fracture propagation in shale formations. Chinese Journal of Rock Mechanics and Engineering,2015,34(2):228-237 (in Chinese))

40 衡帅,杨春和,张保平等. 页岩各向异性特征的试验研究. 岩土力学,2015,36(3):609-616 (Heng Shuai, Yang Chunhe, Zhang Baoping, et al. Experimental research on anisotropic properties of shale. Rock and Soil Mechanics,2015,36(3):609-616 (in Chinese))

41 陈昀, 金衍, 陈勉. 基于能量耗散的岩石脆性评价方法. 力学学报, 2015, 47(6): 984-993 (Chen Yun, Jin Yan, Chen Mian. A rock brittleness evaluation method based on energy dissipation. Chinese Journal of Theoretical and Applied Mechanics, 2015, 47(6): 984-993 (in Chinese))

42 Kang YL, She JP, Hao Z, et al. Alkali erosion of shale by high-pH fluid: Reaction kinetic behaviors and engineering responses. Journal of Natural Gas Science and Engineering, 2016, 29: 201-210

43 俞杨烽. 富有机质页岩多尺度结构描述及失稳机理. [博士论文]. 成都:西南石油大学,2013 (Yu Yangfeng. M ulti-scale structure description and borehole instability mechanism of organic rich shale. [PhD Thesis]. Chengdu:Southwest Petroleum University,2013 (in Chinese))

44 Abass H,Shebatalhamd A,Khan M,et al. Wellbore instability of shale formation: Zuluf field,Saudi Arabia. In: SPE Technical Symposium of Saudi Arabia Section,21-23 May,Dhahran,Saudi Arabia,2006

施引文献(16)

期刊类型引用(8)

1.	耿殿栋，亓宪寅，付鹏，王胜伟，柯婷. 不同钻井液浸泡下泥页岩力学特性及损伤本构模型. 煤炭科学技术. 2023(10): 109-118 . 百度学术
2.	康毅力，田国丰，游利军，闫霄鹏，许成元. 缝面摩滑：深部裂缝性地层钻井液漏失加剧的新机制. 石油钻探技术. 2022(01): 45-53 . 百度学术
3.	张旭，刘向君，袁芳，熊健，万有维. 钻井液矿化度对康村组泥岩强度特征的影响研究. 地下空间与工程学报. 2021(02): 382-389 . 百度学术
4.	陈立超，王生维，张典坤. 压裂液浸泡对高阶煤力学性质的软化机理. 中国煤炭. 2021(12): 38-44 . 百度学术
5.	陈立超，王生维，张典坤. 煤岩脆性特征压痕法评价及储层改造意义. 煤炭学报. 2020(S2): 955-964 . 百度学术
6.	高书阳，豆宁辉，林永学，柴龙，刘锐. 川渝地区龙马溪组页岩储层水化特征评价方法. 石油钻探技术. 2018(03): 20-26 . 百度学术
7.	钟敬敏，齐从丽，温真桃. XC气田须五段气藏水平井井壁稳定性分析. 石油地质与工程. 2017(05): 117-121 . 百度学术
8.	康毅力，张晓怡，游利军，陈强，张杜杰，崔忠余. 页岩气藏自然返排缓解水相圈闭损害实验研究. 天然气地球科学. 2017(06): 819-827 . 百度学术