Calculation of geomechanical parameters and wellbore stability using petrophysical in one of the oilfield, southern Persian Gulf

Yusefi, Fwad; Mollaei, Farhad; Kadkhodaei, Ali; Talebi, Mohammadhossein

doi:10.22055/aag.2019.25731.1848

Calculation of geomechanical parameters and wellbore stability using petrophysical in one of the oilfield, southern Persian Gulf

Authors

¹ Faculty of Petroleum Engineering, Pardise of New Sciences and Technologies, Semnan University, Semnan, Iran

² Petroleum Engineering, Young researchers and elite club, Islamic Azad University, Lamerd Branch, Fars, Iran

³ Faculty of Geology, University of Tabriz, Tabriz, Iran

⁴ Faculty of Mining Engineering, Tehran University, Tehran, Iran

10.22055/aag.2019.25731.1848

Abstract

Geomechanical hydrocarbon reservoirs are important in oil and gas fields' development. Also one of the most important issues is Oil wells stability. Considering being economical this Issue, Determine mud Pressure for well stability is important. The amount and direction of the main tensions, Mechanical properties with pore pressure are input necessary parameters for study. By choosing stubble failure criteria can doing analysis with Fine precision. This study is about how to determine stress around wellbore and how to measure safe mud weight window at every Slope and Azimuth for well in oilfield in south of Persian Gulf by geomechanical method. For this study, then we chose 4 different depth for typical sampling and calculated bottom hole pressure, direct and azimuth of well that well be stable by using Mohr-Colomb criteria. By identifying the input data, different direct and azimuth of well is calculated. Mud window for 4 different depth respectively is 27-36.5 & 29-39.5 & 41-55 & 47.5-55. In continue maximum and minimum mud drilling density is calculated. In the end Obtained ruptures in different direct and azimuth and some of them have been reported.

Keywords

References

Ashtiyani Abdi, Hadi, 2011, The new geomechanical knowledge in hydrocarbon reservoir, scientific and propagative journal of oil & gas exploration & production, N 66.

Fjaer, E; Holt, R.M; Horsrud, P, 2008, Petroleum related rock mechanics, second edition in Elsevier; 140-156.

Hosseini, Farzad, M,H; 2012; Wellbore stability study of Sarvak-Kazhdumi-Dariyan Salman field, IOOC Technical Affairs, Geology Department.

Tavakolifar, A., Abdideh, M., 2011, evaluate well stability using Mohr-Colomb criteria and determination safe mud drilling window one of the oilfield, southern Iran, National Conference on Hydrocarbonial Reservior Engineering.

Zoback, M.D; 2003; Determination of stress orientation and magnitude in deep wells; in international journal of rock mechanics & mining sciences; 1049-1076.

Zoback , M.D; 2007; Reservoir Geomechanics, Cambridge University Press; New York, first edition.

Zoback, M.D; Peska, P; 1995; In situ stress and rock strength in the GBRN/DOE; Pathfinder well, South Eugene Island, Gulf of Mexico. Jour. Petrol Tech, 582.