Stress field analysis and its effect on wellbore stability and selection of optimal wellbore trajectory in the Asmari Formation of Ahvaz oil field

Authors

1 Department of petroleum engineering, Ahvaz faculty of petroleum, Petroleum University of Technology, Ahvaz, Iran

2 Department of Petroleum Engineering, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran

Abstract

The problem of instability of wellbore is one of the common and dangerous problems during drilling operations of oil and gas wells, which causes heavy financial loss to drilling industry every year. Today, companies related to drilling industry use rock mechanic science as a tool for reducing such of problems. In this study, by using the science of rock mechanic and related data of one of wells drilled in the Asmari reservoir of Ahwaz oil field, the stability condition of the wellbore was investigated. Then, the reason for occurrence of the instabilities in this well, and also a solution for drilling the future well in much more stable way were studied. To achieve this goals, the data of four depths from this well which had stability problems were used to perform sensitivity analysis using Mohr-Coulomb and tensile failure criteria. Also, due to the complexity of sensitivity calculations, MATLAB software was used in this article to perform the relevant calculations. The results showed that vertical drilling as well as low mud weight are the main causes of instabilities in this well. According to these analyses, the optimum wellbore trajectory in this field achieved by directional drilling in the direction of the minimum horizontal stress and with inclinations of 27 to 33 degrees. Also, it was deduced that the safe mud weight window of this reservoirs is between 13.13 to 16.16 pounds per gallon. Also, at the end of this study, all possible failure types in different inclinations and azimuths were evaluated and some of them were reported.

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References

AlAjmi, A.M., Zimmerman, R.W., 2006. Stability analysis of vertical boreholes using the Mogi–Coulomb failure criterion. Environmental Earth Sciences 43, 1200-1211. https://doi.org/10.1016/j.ijrmms.2006.04.001
AlAjmi, A.M., Zimmerman, R.W., 2009. A new well path optimization model for increased mechanical borehole stability. Journal of Petroleum Science and Engineering 69, 53-62. https://doi.org/10.1016/j.petrol.2009.05.018
Almasi, A., Mohsenipour, A., 2020. Determining the Mud Window, Geomechanical Model (MEM), and Well Wall Stability Analysis, Using Analytical and Numerical Methods in One of the Wells in Iran’s Southwest Fields. Advanced Applied Geology 12(1), 1-11. https://doi.org/10.22055/AAG.2020.34229.2135
Amiri, M., Lashkaripour, G.R., Ghabezloo, S., Moghaddas, N.H., Tajareh, M. H., 2019. Mechanical earth modeling and fault reactivation analysis for CO 2-enhanced oil recovery in Gachsaran oil field, south-west of Iran. Bulletin of Engineering Geology and the Environment 78, 1-22. https://doi.org/10.1007/s12665-019-8062-1
Bordenave, M., Burwood, R., 1990. Source rock distribution and maturation in the Zagros orogenic belt: provenance of the Asmari and Bangestan reservoir oil accumulations. Organic Geochemistry 16, 369-387. https://doi.org/10.1016/0146-6380(90)90055-5
Bordenave, M., Hegre, J., 2010. Current distribution of oil and gas fields in the Zagros Fold Belt of Iran and contiguous offshore as the result of the petroleum systems. Geological Society, London, Special Publications 330, 291-353.
Fjaer, E., Holt, R.M., Horsrud, P., 2008. Petroleum related rock mechanics, second edition in Elsevier, University of Stavanger., Norway, PP. 59-74.
Gholami, R., Moradzadeh, A., Rasouli, V., Hanachi, J., 2014. Practical application of failure criteria in determining safe mud weight windows in drilling operations. Journal of Rock Mechanics and Geotechnical Engineering 6(1), 13-25. https://doi.org/10.1016/j.jrmge.2013.11.002
Haidari, K., Amini, A., Aleali, M., Solgi, A., 2020. Distribution pattern of Ahwaz sandstone and Kalhur evaporite members of Asmari Formation in Dezful Embayment and Abadan plain, a basis for stratigraphic traps studies. Geopersia 10, 53-63. https://doi.org/10.22059/GEOPE.2019.275999.648463
Hassanzadeh, M., Abdideh, M., 2021. Investigation of reactivation of fault and wellbore stability analysis by the depletion of hydrocarbon reservoirs. Iranian Journal of Engineering Geology 14, 1-22. DOI?
Jafari, J., Mahboubi, A., Moussavi-Harami, R., Al-Aasm, I., 2020. The effects of diagenesis on the petrophysical and geochemical attributes of the Asmari Formation, Marun oil field, southwest Iran. Petroleum Science 17, 292-316. https://doi.org/10.1007/s12182-019-00421-0
Khaksar Manshad, A.K., Jalalifar, H., Aslannejad, M., 2015. Analysis of vertical, horizontal and deviated wellbores stability by analytical and numerical methods. Journal of Petroleum Exploration and Production Technology 4, 359-369. https://doi.org/10.1007/s13202-014-0100-7
Kidambi, T., Kumar, G.S., 2016. Mechanical Earth Modeling for a vertical well drilled in a naturally fractured tight carbonate gas reservoir in the Persian Gulf. Journal of Petroleum Science and Engineering 141, 38–51. https ://doi. org/10.1016/j.petro l.2016.01.003
Ma, T., Chen, P., Yang, C., Zhao, J., 2015. Wellbore stability analysis and well path optimization based on the breakout width model and Mogi–Coulomb criterion. Journal of Petroleum Science and Engineering 135, 678-701. https://doi.org/10.1016/j.petrol.2015.10.029
Maleki, S., 2014. Comparison of different failure criteria in prediction of safe mud weigh window in drilling practice. Earth-Science Reviews 136, 36-58. https://doi.org/10.1016/j.earscirev.2014.05.010
Mirzaghorbanali, A., Afshar, M., 2011. A mud weight window investigation based on the Mogi-Coulomb failure criterion and elasto-plastic constitutive model. Petroleum Science and Technology 29(2), 121-131. https://doi.org/10.1080/10916460903330205
Moos, D., 2003. Comprehensive wellbore stability analysis utilizing quantitative risk assessment. Journal of Petroleum Science and Engineering 38(3-4), 97-109. https://doi.org/10.1016/S0920-4105(03)00024-X
Movahedinia, A.M., Asgari, M.K., Yarahmadi, M., 2013. Estimation of the optimal drilling mud pressure using different failure criteria in deviation wells, Case study: well 2sk 5 of Salman oil field. Journal of Petroleum Research 23, 104-112. https://doi.org/ 10.22078/PR.2013.168
Nguyen, D., Miska, S., Yu, M., Saasen, A., 2010. Modeling thermal effects on wellbore stability, in Proceedings Trinidad and Tobago Energy Resources Conference. OnePetro. https://doi.org/ 10.2523/133428-MS
Shi, X., Cai, W., Meng, Y., Li, G., Li, J., 2015. Wellbore stability analysis based on a new strength criterion.  Journal of Gas Science and Engineering 27,1005-1015. https://doi.org/10.1016/j.jngse.2015.09.050
Taleghani, M.N., Habibnia, B., Motazedi, M.R., Khaledi, M.K., 2015. Geomechanical and well stability analysis in Darkhoin oil field with the purpose of hydraulic fracturing operation.  Iranian Journal of Mining Engineering 10, 35-44. https://doi.org/10.3390/en15217901
Tranggono, H., 2019. Wellbore Collapse Failure Criteria and Drilling Optimization. M.S thesis. University of Stavenger, Stavenger.
Younessi, A., Rasouli, V., 2010. A fracture sliding potential index for wellbore stability analysis. International Journal of Rock Mechanics and Mining Sciences 47(6), 927-939. https://doi.org/10.1016/j.ijrmms.2010.05.014
Yousefi, F., Molaii, F., Kadkhodaii, A., Talebi, M.H., 2018. Calculation of geomechanical parameters and wellbore stability using petrophysical in one of the oilfield, southern Persian Gulf. Advanced Applied Geology 9, 10-16. https://doi.org/ 10.22055/AAG.2019.25731.1848
Zare-Reisabadi, M., Kaffash, A., Shadizadeh, S., 2012. Determination of optimal well trajectory during drilling and production based on borehole stability. International Journal of Rock Mechanics and Mining Sciences 56, 77-87. https://doi.org/10.1016/j.ijrmms.2012.07.018
Zeynali, M.E., 2012. Mechanical and physico-chemical aspects of wellbore stability during drilling operations. Journal of Petroleum Science and Engineering 82, 120-124. https://doi.org/10.1016/j.petrol.2012.01.006
Zhang, K., Zhang, L.L., Zhao, X.S., Wu, J., 2010. Graphene/polyaniline nanofiber composites as supercapacitor electrodes. Chemistry of Materials 22(4), 1392-1401. https://doi.org/10.1021/cm902876u
Zoback, M.D., Reservoir geomechanics. 2010: Cambridge University Press, Cambridge, United Kingdom, 206-331. https://doi.org/10.1017/CBO9780511586477
Advanced Applied Geology
Volume 14, Issue 1
April 2024
Pages 202-221

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