OJCM  Vol.6 No.3 , July 2016
Experimental Investigation of the Impact of Compression on the Petro-Physical and Micromechanical Properties of Wellbore Cement Containing Salt
Abstract: In this study, we investigated the effect of compression on the micromechanical and the petro- physical properties of salted wellbore cement systems. The experiments were conducted using a customized bench scale model, which utilized an expandable tubulars simulating the compression of a previously cemented casing under field-like conditions. The “mini-wellbore model” sample consisted of a pipe inside pipe assembly with a cemented annulus. The cement samples were cured in a water bath for 28 days prior to the compression experiments to allow adequate hydration. The impact of compression on the cement’s petro-physical and mechanical properties was quantified by measuring the porosity, permeability and hardness of salt cement cores drilled parallel to the orientation of the pipe from the compacted cement sheath. Permeability (Core-flood) experiments were conducted at 21℃, 10,342 kPa confining pressure for a period of 120 minutes. During the core-flood experiments, conducted using Pulse-decay method, deionized water was flowed through cement cores to determine the permeability of the cores. The results obtained from these experiments confirmed that the compression of the cement positively impacted the cements ability to provide long term zonal isolation, shown by the effective reduction in porosity and permeability. Furthermore, the results confirm reduction in the detrimental effect of salt on the strength and stiffness in post-compression cement.
Cite this paper: Oyibo, A. and Radonjic, M. (2016) Experimental Investigation of the Impact of Compression on the Petro-Physical and Micromechanical Properties of Wellbore Cement Containing Salt. Open Journal of Composite Materials, 6, 59-68. doi: 10.4236/ojcm.2016.63006.

[1]   Nelson, E.B., Ed. (1990) Well Cementing. Elsevier Science, New York.

[2]   Davies, R.J., et al. (2014) Oil and Gas Wells and Their Integrity: Implications for Shale and Unconventional Resource Exploitation. Marine and Petroleum Geology, 56, 239-254.

[3]   Jandhyala, S.R.K., Ravi, K. and Anjos, J. (2015) Design Procedure for Cementing Intercalated Salt Zones. OTC Brasil, Rio de Janeiro, Brazil, 27-29 October, 1-3.

[4]   Lewis, W.J. and Rang, C.L. (1987) Salt Cements for Improved Hydraulic Isolation and Reduce Gas Channeling. SPE California Regional Meeting, Ventura, California, 8-10 April 1987, 1-4.

[5]   Mbadike, E.M. and Elinwa, A.U. (2012) Effect of Salt Water in the Production of Concrete. Nigerian Journal of Technology, 30, 105-110.

[6]   Smith, D.K. (1976) Cementing. SPE of AIME Monograph, Vol. 4, Henry L. Doherty Series, Society of Petroleum Engineers, Dallas.

[7]   Barlet-Gouédard, V., et al. (2009) A Solution against Well Cement Degradation under CO2 Geological Storage Environment. International Journal of Greenhouse Gas Control, 3, 206-216.

[8]   Griffin, D.F. and Henry, R.L. (1962) The Effect of Salt in Concrete on Compressive Strength, Water Vapor Transmission, and Corrosion of Reinforcing Steel Y-R007-05-01-012.

[9]   Longson, W.B. (1964) The Use of Salt Cement Blends as an Aid to Better Cementing in Formations Containing Fresh Water Sensitive Clays. Journal of Canadian Petroleum Technology, 3, 95-100.

[10]   Glinicki, M.A. and Zielinski, M. (2004) Depth-Sensing Indentation Method for Evaluation of Efficiency of Secondary Cementitious Materials. Cement and Concrete Research, 34, 721-724.

[11]   Kupresan, D., Heathman, J. and Radonjic, M. (2013) Application of a New Physical Model of Expandable Casing Technology in Mitigation of Wellbore Leaks. Journal of Canadian Energy Technology & Innovation (CETI), 1, No. 5.

[12]   Radonjic, M. and Kupresan, D. (2013) Mechanical Expansion of Steel Tubing as a Solution to Leaky Wellbores. Journal of Visualized Experiments, 93, e52098-e52098.

[13]   Oliver, W.C. and Pharr, G.M. (2004) Measurement of Hardness and Elastic Modulus by Instrumented Indentation: Advances in Understanding and Refinements to Methodology. Journal of Materials Research, 19, 3-20.

[14]   Oyibo, A. and Radonjic, M. (2015) Impact of Compression on the Petro-Physical and Mechanical Properties of Wellbore Cement Containing Salt. 49th US Rock Mechanics/Geomechanics Symposium, San Francisco, CA, USA, 28 June-1 July 2015, 1-7.

[15]   API Recommended Practice 90 (2006) Annular Casing Pressure Management for Offshore Wells. American Petroleum Institute, USA.

[16]   Radonjic, M. and Oyibo, A. (2014) Comparative Experimental Evaluation of Drilling Fluid Contamination on Shear Bond Strength at Wellbore Cement Interfaces. World Journal of Engineering, 11, 597-604.

[17]   Hay, J.L. and Pharr, G.M. (2000) Instrumented Indentation Testing. ASM International, Materials Park, OH, 232-243.

[18]   Kumar, V., Sondergeld, C.H. and Rai, C.S. (2012) Nano to Macro Mechanical Characterization of Shale. SPE Annual Technical Conference and Exhibition, San Antonio, TX, USA, 8-10 October 2012, 1-23.