Investigate the Effects of Formation Cutting Transportation in Inclined Wells to Prevent the Occurrence of Mechanical Stuck Pipes in an Iraqi Oilfield

Mustafa A. Issa; Muntadher A.  Issa; Ali A.  Al-Zuobaidi; Ayad A. Alhaleem  A. Alrazzaq

doi:10.52716/jprs.v15i4.947

Authors

Mustafa A. Issa Engineer
Muntadher A. Issa Petroleum Engineering Department, University of Baghdad, Baghdad, Iraq.
Ali A. Al-Zuobaidi Basra Oil Company, Ministry of Oil, Basra, Iraq
Ayad A. Alhaleem A. Alrazzaq Petroleum Engineering Department, University of Baghdad, Baghdad, Iraq

DOI:

https://doi.org/10.52716/jprs.v15i4.947

Keywords:

hole cleaning, cutting removal, minimum flow rate, mechanical pipe sticking, drilling parameters.

Abstract

During drilling operations, cutting removal in deviated and vertical wells is one of the most significant challenges. It can cause high torque and drag, mud circulation loss, casing installation difficulties, poor cementing operations, and mechanical pipe sticking. These challenges can potentially increase non-productive time (NPT) and well costs. This study utilized Well Plan™ software to establish a hole-cleaning model for a specific well situated in the southern Iraqi oilfield. Thus, the minimum flow rate and cutting bed height necessary to ensure efficient cutting transportation from the borehole were calculated, resulting in the elimination or reduction of the mechanical pipe sticking problem. Subsequently, the influence of the drilling parameters on the removal of cuttings was examined by determining the minimum flow rate. The study's findings indicate that there is a direct relationship between the minimum flow rate and certain drilling parameters, i.e., plastic viscosity, penetration rate, well inclination, and cutting density. While inverse relationship with other parameters, i.e., yield point, drilling mud weight, and rotation speed of drill string. Additionally, the minimum flow rate that is obtained from Well Plan™ software is greater than the actual flow rate. For instance, during the run-in hole where pipe stuck occurs in the Tanuma Formation, the actual flow rate was 713 gpm, while the minimum flow rate and the cutting bed height that are calculated from this model are 970 gpm and 1.77" respectively. Ultimately, the research findings can be utilized to financially support upcoming drilling operations in the surrounding area of the study.

References

D. Q. Khanh, T. T. T. Dat, K. Phuc, T. T. M. Huong, and H. T. Quang, “Modeling on Cuttings Transport in Inclined and Horizontal Well Drilling”, in CIGOS 2019, Innovation for Sustainable Infrastructure, Springer, pp. 853–858, 2020. https://doi.org/10.1007/978-981-15-0802-8_136.

N. S. Amina and A. A. Alhaleemb, “Analysis of stuck pipe incidents in khabaz field”, Iraqi Journal of Chemical and Petroleum Engineering, vol. 19, no. 4, pp. 47–53, 2018. https://doi.org/10.31699/IJCPE.2018.4.6.

S. E. Mohammed and F. H. M. Almahdawi, “Experimental Study for Assessment of Cutting Density Effect on Hole Cleaning Efficiency in Inclined and Horizontal Wells”, Iraqi Journal of Chemical and Petroleum Engineering, vol. 21, no. 3, pp. 1–8, 2020. https://doi.org/10.31699/IJCPE.2020.3.1.

A. T. Bourgoyne, K. K. Millheim, M. E. Chenevert, and F. S. Young, “Applied drilling engineering”, (2-nd printing), Society of Petroleum Engineers, Richardson, 1991. https://doi.org/10.2118/9781555630010.

A. H. Fallah, Q. Gu, G. Saini, D. Chen, P. Ashok, E. van Oort, and A. Karimi Vajargah, “Hole cleaning case studies analyzed with a transient cuttings transport model”, in SPE Annual Technical Conference and Exhibition, SPE, 2020, p. D021S015R004. https://doi.org/10.2118/201461-MS.

R. B. Adari, S. Miska, E. Kuru, P. Bern, and A. Saasen, “Selecting Drilling Fluid Properties and Flow Rates For Effective Hole Cleaning in High- Angle and Horizontal Wells”, in the 2000 SPE Annual Technical Conference, Dallas, Texas, 2000, pp. 1–9. doi: 10.2118/63050-ms. https://doi.org/10.2118/63050-ms.

O. Erge and E. van Oort, “Modeling cuttings transport and annular pack-off using local fluid velocities with the effects of drillstring rotation and eccentricity”, in SPE/IADC Drilling Conference and Exhibition, SPE, 2020, p. D101S019R004. https://doi.org/10.2118/199587-MS.

J. J. Azar and G. R. Samuel, "Drilling engineering", PennWell books, 2007.

S. L. L. Center, “Stuck Pipe Prevention Self-Learning Course”, December, 1999.

Y. Luo, P. A. Bern, and B. D. Chambers, “Flow-rate predictions for cleaning deviated wells”, in IADC/SPE Drilling Conference, OnePetro, 1992. https://doi.org/10.2118/23884-MS.

N. Mukai, K. Fujita, A. AL-Kasasbeh, S. M. Karrani, and A. Al-Marzouqi, “A New Approach to the Feasibility Design in Development Fields”, in SPE/IADC Middle East Drilling Technology Conference and Exhibition, OnePetro, 2016. https://doi.org/10.2118/178226-MS.

J. M. Peden and Y. Luo, “Settling velocity of variously shaped particles in drilling and fracturing fluids”, SPE Drill. Eng., vol. 2, no. 04, pp. 337–343, 1987. https://doi.org/10.2118/16243-PA.

J. M. Peden, J. T. Ford and, and M. B. Oyeneyin, “Comprehensive experimental investigation of drilled cuttings transport in inclined wells including the effects of rotation and eccentricity,” in European Petroleum Conference, OnePetro, 1990. https://doi.org/10.2118/20925-MS.

C. Bowes and R. Procter, “Drillers stuck pipe handbook, 1997 guidelines & drillers handbook credits”, Schlumberger, Ballater, Scotl., 1997.

S. T. Saleh and B. J. Mitchell, “Wellbore drillstring mechanical and hydraulic interaction”, in SPE California Regional Meeting, OnePetro, 1989. https://doi.org/10.2118/18792-MS.

M. Adil Issa, F. Ali Hadi, and R. Nygaard, “Coupled reservoir geomechanics with sand production to minimize the sanding risks in unconsolidated reservoirs”, Petroleum Science and Technology, vol. 40, no. 9, pp. 1065–1083, 2022. https://doi.org/10.1080/10916466.2021.2014522.

M. A. Issa, M. A. Issa, and A. A. A. A. Alrazzaq, “Developing a Geomechanical Model to Mitigate the Risks of Wellbore Instability in an Iraqi Oilfield”, Indian Geotechnical Journal, pp. 1–14, 2023. https://doi.org/10.1007/s40098-023-00726-3.