Investigating the effect of oil well cement composition on the cement sheath integrity

Document Type : Research Paper

Authors

Faculty of Petroleum and Natural Gas Engineering

10.22124/jcr.2024.26195.1635

Abstract

Oil and gas wells are usually cased and cemented to provide a long-term integrity during the life of the well. Maintaining the integrity of the oil and gas wells, which is largely dependent on the characteristics of the cement, can prevent irreparable damage to the environment. To maintain well integrity, cement sheath must have low porosity, low permeability, sufficient bond strength at the contact surfaces, and suitable rock mechanical properties to withstand the induced stresses. In this research, cement compositions based on Portland cement, silica flour and magnesium oxide were developed and experimentally tested to evaluate their ability of well integrity provision. Tests were performed on raw materials, cement slurry and set cement samples. These tests included measurements of density, slurry free fluid, set cement porosity, permeability, bond strength, compressive strength, and Young's modulus. The results showed that with the addition of silica fluor, the porosity and permeability of set cement decreased to 9.76% and 0.037 mD, and with the addition of magnesium oxide, the bond strength and Young's modulus increased to 503.4 and 418.32 MPa. Also, the results showed that the addition of these materials leads to a reduction in the cement compressive strength.

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References

[1]. Himmelberg, N.C., “Numerical Simulations for Wellbore Stability and Integrity for Drilling and Completions”, Masters Theses. Missouri University of science and technology, 2021.
[2]. Mohammed, A.I., Oyeneyin, B., Atchison, B., Njuguna, J. “Casing Structural Integrity and Failure Modes in a Range of Well Types - A Review”, Journal of Natural Gas Science and Engineering, 68, 102898, 2019.
[3]. Bois, A.P., Vu, M.H., Ghabezloo, S., Sulem, J., Garnier, A., Laudet, J.B. “Cement Sheath Integrity for CO2 Storage–An Integrated Perspective, Energy Procedia, 37: 5628-5641, 2013.
[4]. Bellabarba, M., Bulte-Loyer, H., Froelich, B., Le Roy-Delage, S., van Kuijk, R., Zeroug, S., Guillot, D., Moroni, N., Pastor, S., Zanchi, A. “Ensuring zonal isolation beyond the life of the well”, Oilfield, 20(1):18-31, 2008.
[5]. Lavrov, A., Torsæter, M. “Physics and Mechanics of Primary Well Cementing”, Springer Briefs in Petroleum Geoscience & Engineering, 2016.
[6]. Himmelberg, N.C. “Numerical Simulations for Wellbore Stability and Integrity for Drilling and Completions”, Masters Theses. Missouri University of science and technology, 2014.
[7]. Torbergsen, H.E.B., Haga, H.B., Sangesland, S., Aadnoy, B.S., Sæby, J., Johnsen, S., Rausand, M., Lundeteigen, M. A. “An Introduction to Well Integrity”, Norwegian University of Science and Technology. 2012.
[8]. Vignes, B., Aadnøy, B.S. “Well-Integrity Issues Offshore Norway”, SPE Production & Operations, 25(02): 145–150, 2010.
[9]. Teodoriu, C., Ugwu, I.O., Schubert, J.J. “Estimation of Casing-Cement-Formation Interaction using a new analythical model”, SPE EUROPEC/EAGE Annual Conference and Exhibition, 2010.
[10]. Yuan, Z., Schubert, J., Teodoriu, C., Gardoni, P. “HPHT Gas Well Cementing Complications and its Effect on Casing Collapse Resistance”, SPE Oil and Gas India Conference and Exhibition, 2013.
[11]. Tabatabaee Moradi, S.Sh., Nikolaev, N.I., Naseri, Y. “Developing High Resistant Cement Systems for High-pressure, High temperature Applications”, SPE Russian Petroleum Technology Conference, 2015.
[12]. Schrepers, G. “A Framework for Wellbore Cement Integrity Analysis”, 49th U.S. Rock Mechanics/Geomechanics Symposium, 2015.
[13]. Phi, T., Elgaddafi, R., Al Ramadan, M., Ahmed, R., Teodoriu, C. “Well Integrity Issues: Extreme High-Pressure High-Temperature Wells and Geothermal Wells a Review”, SPE Thermal Well Integrity and Design Symposium, 2019.
[14]. Wu, U., Salehi, S. “A Numerical and Experimental Study on Cement Integrity Based on a Novel Method”, Rock Mechanics/Geomechanics Symposium, 2020.
[15]. Lamik, A., Pittino, G., Prohaska-Marchried, M., Krishna, R., Thonhauser, G., Antretter, T. “Evaluation of Cement-Casing & Cement-Rock Bond Integrity During Well Operations”, SPE/IADC Middle East Drilling Technology Conference and Exhibition, 2021.
[16]. Bahafid, S., Ghabezloo, S., Duc, M., Faure, P., Sulem, J. “Effect of the hydration temperature on the microstructure of Class G cement: CSH composition and density”, Cement and Concrete Research, 95: 270-281, 2017.
[17]. API. Specification for cements and materials for well cementing. in: ANSI/API SPECIFICATION 10A. American Petroleum Institute, 2005.
[18]. Tabatabaee Moradi, S.Sh., Nikolaev, N.I. “Sedimentation Stability of Oil Well Cements in Directional Wells”, IJE Transactions A: Basics 30(7): 1105-1109. 2017.
[19]. Grabowski, E., Gillott, J.E. “Effect of replacement of silica flour with silica fume on engineering properties of oilwell cements at normal and elevated temperatures and pressures”, Cement and Concrete Research, 19(3): 333–344, 1989. 
[20]. Rahaei, M.B., Yazdani rad, R., Kazemzadeh, A., Ebadzadeh, T. “Mechanochemical synthesis of nano TiC powder by mechanical milling of titanium and graphite powders”, Powder Technology, 217: 369–376, 2012.
 

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