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Effects of drilling fluids on the strength properties of clay-bearing rocks

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Abstract

Certain drilling problems are frequently observed during different types of drilling (e.g. geothermal, oil, geotechnical). In order to maintain the stability of boreholes, analysis of the essential parameters affecting their stability, including induced post-drilling stresses, the geomechanical properties of the rocks encountered during drilling and the type of drilling fluid used, should be considered. Well pressure, which is a function of the density of the drilling fluid, should be kept at a level that will not create shear- or tensile-type failure around the borehole walls; however, the mechanical properties of rocks are not constant and can be varied due to the interaction between drilling fluid and rock materials especially for clay-bearing rocks. Despite being aware of these factors, to date, no comprehensive study has been conducted on these issues. In order to overcome these shortcomings, the variations in mechanical properties of two clay-bearing sediments, which were saturated with different types of drilling fluids that are widely used in drilling practices, were investigated. By considering the obtained geomechanical properties, the effect of drilling fluids was compared and evaluated in terms of degradation of mechanical properties. As the occurrence of excess pore pressures that can develop under undrained conditions around a borehole is essential to borehole stability, the distribution of excess pore pressures and plastic deformations was also investigated by a finite element-based borehole simulation under drained and undrained conditions. By considering the results of experimental and numerical studies, some recommendations were presented for understanding wellbore stability.

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References

  • Aadnoy BS (1996) Modern well design. A. A. Balkema Publishers, Netherland

    Google Scholar 

  • Aoki T, Tan CP, Bamford WE (1993) Effects of deformation and strength anisotropy on borehole failures in saturated shales. Int J Rock Mech Min Sci Geomech Abstr 30(7):1031–1034

    Article  Google Scholar 

  • API Specification 13A (2010) Specifications for drilling fluid materials, 18th edn. American Petroleum Institute, Washington, DC, p 130

  • Chen G, Chenevert MA, Sharma MM, Yu M (2003) A study of wellbore stability in shales including poroelastic, chemical, and thermal effects. J Pet Sci Eng 38:167–176

    Article  Google Scholar 

  • Dönmez M, Akçay AA, Türkecan A (2014) İzmir-K 18 Paftası, 1:100.000 Ölçekli Türkiye Jeoloji Haritaları, No:213, MTA Jeoloji Etütleri Dairesi, Ankara

  • Dyke CG, Dobereiner L (1991) Evaluating the strength and deformability of sandstones. Q J Eng Geol 24:123–134

    Article  Google Scholar 

  • Ergüler ZA, Ulusay R (2009) Water-induced variations in mechanical properties of clay-bearing rocks. Int J Rock Mech Min Sci 46(2):355–370

    Article  Google Scholar 

  • Ewy RT, Bovberg CA, Stankovich RJ (2008) Shale triaxial strength alteration due to brine exposure. The 42nd U.S. Rock Mechanics Symposium (USRMS), 29 June-2 July, San Francisco, California

  • Gerçek, H. (2007). Poisson’s ratio values for rocks. Int J Rock Mech Min Sci 44(1):1–13

    Article  Google Scholar 

  • Goodman RE (1989) Introduction to rock mechanics. Wiley, NewYork

    Google Scholar 

  • Grillet AM, Wyatt NB, Gloe LM (2012) Polymer gel rheology and adhesion. In: De Vicente J (ed) Rheology, IntechOpen. https://doi.org/10.5772/2065

    Google Scholar 

  • Gündoğdu MN (1982) Geological, mineralogical and geochemical investigatoin of the Neogene aged Bigadic sedimentary basin. PhD Thesis, Geological Engineering Department, Hacettepe University, Ankara (in Turkish)

  • Hawkins AB (1998) Aspects of rock strength. Bull Eng Geol Environ 57:17–30

    Article  Google Scholar 

  • He S, Liang L, Zeng Y, Ding Y, Lin Y, Liu X (2016) The influence of water-based drilling fluid on mechanical property of shale and the wellbore stability. Petroleum 2(1):61–66

    Article  Google Scholar 

  • ISRM (2007) The complete ISRM suggested methods for rock characterization, testing and monitoring: 1974-2006. Suggested methods prepared by the commission on testing methods. In: Ulusay R, Hudson JA (eds) Compilation arranged by the ISRM Turkish National Group. ISRM, Ankara

  • Javalagi S and Singireddy SR (2012) Hydraulic fluid properties and its influence on system performance. Master’s degree project. Division of fluid and mechatronic systems department of management and engineering. LIU-IEI-TEK-A--12/01284—SE

  • Karakul H, Ulusay R (2013) Empirical correlations for predicting strength properties of rocks from P-wave velocity under different degrees of saturation. Rock Mech Rock Eng 46(5):981–999

    Article  Google Scholar 

  • Lashkaripour GR (2002) Predicting mechanical properties of mudrock from index parameters. Bull Eng Geol Environ 61:73–77

    Article  Google Scholar 

  • Liu X, Zeng W, Liang L, Xiong J (2016) Experimental study on hydration damage mechanism of shale from the Longmaxi formation in southern Sichuan Basin, China. Petroleum 2:54–60

    Article  Google Scholar 

  • Liu J, Feng Q, Wang Y, Bai Y, Wei J, Song Z (2017) The effect of polymer-fiber stabilization on the unconfined compressive strength and shear strength of sand. Adv Mater Sci Eng Article ID 2370763, 9 pages

  • Mavko G, Mukerji T, Dvorkin J (2009) The rock physics handbook. Cambridge University Press, New York

    Book  Google Scholar 

  • Mkpoikana R, Dosunmu A, Eme C (2015) Prevention of shale instability by optimizing drilling fluid performance. SPE Nigeria Annual International Conference and Exhibition, 4-6 August, Lagos, Nigeria

  • Nmebgu CGJ, Ohazurulike LV (2014) Wellbore instability in oil well drilling: a review. Int J Eng Res Dev 10(5):11–20

    Google Scholar 

  • Pasic B, Medimurec NG, Matanovic D (2007) Wellbore instability: causes and consequences. Rudarsko-geološko-naftni zbornik 19:87–98

    Google Scholar 

  • Plaxis (2016) PLAXIS material models manual. Plaxis, Delft

    Google Scholar 

  • Shakib JT, Jalalifar H, Akhgarian E (2013) Wellbore stability in shale formation using analytical and numerical simulation. J Chem Petrol Eng 47(1):51–60

    Google Scholar 

  • Shilko EV, Dimaki AV, Psakhie SG (2018) Strength of shear bands in fluidsaturated rocks: a nonlinear effect of competition between dilation and fluid flow. Sci Rep 8:1428. https://doi.org/10.1038/s41598-018-19843-8

    Article  Google Scholar 

  • Skempton AW (1954) The pore-pressure coefficients A and B. Geotechnique 4:143–147

    Article  Google Scholar 

  • Torok A, Vasarhelyi B (2010) The influence of fabric and water content on selected rock mechanical parameters of travertine, examples from Hungary. Eng Geol 115:237–245

    Article  Google Scholar 

  • Vasarhelyi B (2005) Statistical analysis of the influence of water content on the strength of the Miocene limestone. Rock Mech Rock Eng 38(1):69–76

    Article  Google Scholar 

  • Vipulanandan C, Mohammed AS (2014) Hyperbolic rheological model with shear stress limit for acrylamide polymer modified bentonite drilling muds. J Pet Sci Eng 122:38–47

    Article  Google Scholar 

  • Wong LNY, Maruvanchery V, Liu G (2016) Water effects on rock strength and stiffness degradation. Acta Geotech 11(4):713–737

    Article  Google Scholar 

  • Yan C, Deng J, Yu B (2013) Wellbore stability in oil and gas drilling with chemical-mechanical coupling. Sci World J 2013:720271

    Google Scholar 

  • Yılmaz I (2010) Influence of water content on the strength and deformability of gypsum. Int J Rock Mech Min Sci 47(2):342–347

    Article  Google Scholar 

  • Yu B, Yan C, Nie Z (2013) Chemical effect on wellbore instability of Nahr Umr shale. Sci World J 2013:931034

    Google Scholar 

  • Zhang J (2017) Effects of porosity and permeability on invasion depth during drilling mud-filtrate invading into a reservoir dynamically. Adv Comput Sci Res 76:203–206

    Google Scholar 

  • Zosel A (1985) Adhesion and tack of polymers: influence of mechanical properties and surface tensions. Colloid Polym Sci 263:541–553 ISSN 0303-402X

    Article  Google Scholar 

Download references

Acknowledgments

The author is grateful to Assistant Professor Ali Ettehadi and Osman Ünal (Research assistant) for their kind help with the viscosity measurements of the drilling fluids, and to Naci Sertuğ Şenol (Graduate student) for his help in rock sampling studies.

Funding

This work was supported by the Scientific Research Project Coordination Unit (Project No. 2016-GAP-MÜMF-0004) of İzmir Kâtip Çelebi University.

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Authors and Affiliations

  1. Department of Petroleum and Natural Gas Engineering, İzmir Kâtip Çelebi University, İzmir, Turkey

    Hasan Karakul

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  1. Hasan Karakul
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Correspondence to Hasan Karakul.

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Karakul, H. Effects of drilling fluids on the strength properties of clay-bearing rocks. Arab J Geosci 11, 450 (2018). https://doi.org/10.1007/s12517-018-3816-8

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  • DOI: https://doi.org/10.1007/s12517-018-3816-8

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