American Journal of Geophysics, Geochemistry and Geosystems
Articles Information
American Journal of Geophysics, Geochemistry and Geosystems, Vol.5, No.3, Sep. 2019, Pub. Date: Oct. 29, 2019
Estimation of Minimum and Maximum Horizontal Stresses from Well Log, a Case Study in Rumaila Oil Field, Iraq
Pages: 78-90 Views: 207 Downloads: 298
[01] Hussein Saeed Almalikee, Fields Division, Basrah Oil Company, Basrah, Iraq.
[02] Fahad Mansour Alnajm, Geology Department, University of Basrah, Basrah, Iraq.
Minimum and maximum horizontal stress (Shmin and Shmax) are two of the three principal stresses that are required for any Geomechanical study, especially wellbore stability analysis, sand production and hydraulic fracturing. The values of horizontal stresses are also important and required for planning high angle and horizontal wells, especially in Rumaila super-giant oil field in order to target thin sandstone layers in the non-depleted units of the Zubair reservoir to increase production with less numbers of new oil wells. Shmax and Shmin can be directly measured using leak off test (LOT), extended leak off test (XLOT), or indirectly estimated by well log data. In this study, Shmin and Shmax were predicted using Eaton method, this method relies on the relationship between overburden stress, pore pressure and rock mechanical properties (Poisson’s ratio), these parameters could be estimated by employing logging data such as sonic and density logs from five wells in Rumaila oil field. The values of Shmin was then calibrated with extended leak off test measurements in order to add the effect of tectonic, results showed that Rumaila oil field is under strike slip stress regime (SHmax>SV>Shmin) and the optimal direction to drill deviated and horizontal well is parallel to the maximum horizontal stress direction.
Horizontal Stress, Wellbore Stability, Poisson’s Ratio
[01] Sinha, B. K., Wang, J., Kisra, S., Li, J., Pistre, V., and Jun, C. (2008). Estimation of formation stresses using borehole sonic data. In 49th Annual Logging Symposium. Society of Petrophysicists and Well-Log Analysts.
[02] Zoback, M. D. (2007). Reservoir Geomechanics. Cambridge University Press.
[03] Aadnoy, B., and Looyeh, R. (2011). Petroleum rock mechanics: drilling operations and well design. Gulf Professional Publishing.
[04] Harikrishnan, R., and Hareland, G. (1995). Prediction of minimum principal in-situ stress by comparison and verification of four methods. In SPE Asia Pacific Oil and Gas Conference. Society of Petroleum Engineers.
[05] Al-Malikee, H. S., & Al-Najim, F. M. (2018). Indirect Prediction of Rock Elasticity and Compressibility Strength Using Well Log Data at Selected Sites within Rumaila Oilfield, Southern Iraq. The Iraqi Geological Journal, 41-53.
[06] Amadei, B., and Stephansson, O. (1997). Rock stress and its measurement. Springer Science and Business Media.
[07] Blanton, T. L., and Olson, J. E. (1997). Stress magnitudes from logs: effects of tectonic strains and temperature. In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers.
[08] Hudson, J. A., and Harrison, J. P. (2000). Engineering rock mechanics: an introduction to the principles. Elsevier.
[09] Molaghab, A., Taherynia, M. H., Aghda, S. M. F., and Fahimifar, A. (2017). Determination of minimum and maximum stress profiles using wellbore failure evidences: a case study—a deep oil well in the southwest of Iran. Journal of Petroleum Exploration and Production Technology, 7 (3), 707-715.
[10] Addis, M. A., Hanssen, T. H., Yassir, N., Willoughby, D. R., and Enever, J. (1998). A comparison of leak-off test and extended leak-off test data for stress estimation. In SPE/ISRM Rock Mechanics in Petroleum Engineering. Society of Petroleum Engineers.
[11] Daines, S. R. (1982). Prediction of fracture pressures for wildcat wells. Journal of Petroleum Technology, 34 (04), 863-872.
[12] Song, L. (2012). Measurement of minimum horizontal stress from logging and drilling data in unconventional oil and gas (Master dissertation, University of Calgary).
[13] Peng, S., and Zhang, J. (2007). Engineering geology for underground rocks. Springer Science and Business Media.
[14] Bredehoeft, J. D., Wolff, R. G., Keys, W. S., and Shuter, E. (1976). Hydraulic fracturing to determine the regional in situ stress field, Piceance Basin, Colorado. Geological Society of America Bulletin, 87 (2), 250-258.
[15] Li, S., and Purdy, C. C. (2010). Maximum horizontal stress and wellbore stability while drilling: Modeling and case study. In SPE Latin American and Caribbean Petroleum Engineering Conference. Society of Petroleum Engineers.
[16] Almalikee, H. S. A., and Al-Najim, F. M. S. (2018). Overburden stress and pore pressure prediction for the North Rumaila oilfield, Iraq. Modeling Earth Systems and Environment, 4 (3), 1181-1188.
[17] Al-Ajmi, A. M., and Zimmerman, R. W. (2009). A new well path optimization model for increased mechanical borehole stability. Journal of Petroleum Science and Engineering, 69 (1), 53-62.
MA 02210, USA
AIS is an academia-oriented and non-commercial institute aiming at providing users with a way to quickly and easily get the academic and scientific information.
Copyright © 2014 - American Institute of Science except certain content provided by third parties.