General Information
    • ISSN: 2010-0221
    • Frequency: Bimonthly
    • DOI: 10.18178/IJCEA
    • Editor-in-Chief: Prof. Dr. Shen-Ming Chen
    • Executive Editor: Mr. Ron C. Wu
    • Abstracting/ Indexing: Chemical Abstracts Services (CAS), Ulrich's Periodicals Directory, CABI, Electronic Journals Library, Google Scholar, ProQuest, and Crossref
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  • May 30, 2018 News! Vol.9, No.3 has been published with online version. 6 peer reviewed papers are published in this issue.   [Click]
  • Mar 02, 2018 News! Vol.9, No.1 has been published with online version. 6 peer reviewed papers are published in this issue.   [Click]
Editor-in-chief
Prof. Dr. Shen-Ming Chen
National Taipei University of Technology, Taiwan
 

IJCEA 2018 Vol.9(2): 38-45 ISSN: 2010-0221
doi: 10.18178/ijcea.2018.9.2.696

Advanced Geomechanical Earth Model for Predicting Wellbore Stability and Fracking Potential

Rehan Ali Mohammed, Syedalireza Khatibi, Mehdi Ostadhassan, Azadeh Aghajanpour, and Alan Alexeyev
Abstract—Minimizing the costs and risks of drilling and achieving a maximum production rate in tight shale formations is technically and economically challenging. An in-depth investigation of the Geomechanical behavior of the reservoir, including rock elastic and strength properties, and the in-situ stresses, which leads to Mechanical Earth Model (MEM), is inevitable.
In this paper, a new concept of estimating fracturing potential by Fracture Mechanical Earth Model (FMEM) is presented. We analyzed the state of In-situ stresses, formation Properties, and type of instabilities that occur around the trajectory of the wellbore by acquiring anisotropic poroelastic relationships to incorporate pore pressure and stresses changes in the field more accurately. In the next step, we determined safe mud weight window to avoid shear and tensile failure during drilling and mitigating other wellbore instabilities issues by controlling the sub surface parameters. Frack-ability, brittleness, and ductility of rock are formation stress dependent which varies from region to region, not all the rocks respond in the same manner to fracturing job. To study the fracking potential of a particular formation, along with data required for MEM, rock Brittleness properties, which govern fracture kinematic Properties (initiation, propagation, closure, toughness) should be studied as well.
To do so, we used Well logs to create (FMEM) to predict fracking potential. Brittleness was extracted from the Geomechanical and Mineralogical analysis. In the next step, we showed Total Organic Carbon (TOC) present in the matrix affects stiffness and frack ability of rocks. (TOC) Obtained from Log Based analysis was calibrated with TOC from Laboratory experiments on core Samples. The constructed FMEM revealed how changes in pore pressure, in-situ stress properties, and physiochemical of the shale could hugely influence the drilling operations in the field. The Constructed FMEM revealed sweet spots for Fracking from the field, which will be an input of paramount importance in planning phases of well which will have an immense impact on Future Deviated Drilling and Hydraulic Fracturing, studies.

Index Terms—Fracture mechanical earth model, wellbore stability, brittleness.

Rehan Ali Mohammed is with Department of Petroleum Engineering, University of North Dakota, Grand Forks, North Dakota, ND 58203 USA (e-mail: rehanali2731@gmail.com).
Seyedalireza Khatibi is with University of North Dakota, Grand Forks, North Dakota, 58203 USA (e-mail: seyedalireza.khatibi@und.edu).
Mehdi Ostadhassan is with University of North Dakota, Grand Forks, ND, USA. (e-mail: mehdi.ostadhassan@engr.und.edu).
Azadeh Aghajanpour is with Curtin University, Sarawak (e-mail: Azadehaghajanpour@gmail.com).
Alexeyev Alan is with University of North Dakota, Grand Forks, North Dakota,58203, USA (e-mail: aalexeyev@uh.edu).

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Cite: Rehan Ali Mohammed, Syedalireza Khatibi, Mehdi Ostadhassan, Azadeh Aghajanpour, and Alan Alexeyev, "Advanced Geomechanical Earth Model for Predicting Wellbore Stability and Fracking Potential," International Journal of Chemical Engineering and Applications vol. 9, no. 2, pp. 38-45, 2018.

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