Flood experiments were conducted over 30-day periods at 14.48 MPa (2100 psi) confining pressure and temperature of 22 °C (72 °F) with cement–sandstone composite cores and brine at a flow rate of 1 ml/min. Higher pH values were observed in the effluent brine from the 10% mud contaminated core than the 0% mud contaminated core due to increased dissolution of cement. Microtomography revealed higher porosity at the interface zone of the 10% mud contaminated core. These show that mud contamination has a deleterious effect on the cement–sandstone interface and may create pathways for interzonal communication as well as sustained casing pressure.
Experimental Study of the Impact of Drilling Fluid Contamination on the Integrity of Cement–Formation Interface
Contributed by the Petroleum Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received October 3, 2013; final manuscript received February 8, 2014; published online November 10, 2014. Assoc. Editor: Andrew K. Wojtanowicz.
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Agbasimalo, N., and Radonjic, M. (December 1, 2014). "Experimental Study of the Impact of Drilling Fluid Contamination on the Integrity of Cement–Formation Interface." ASME. J. Energy Resour. Technol. December 2014; 136(4): 042908. https://doi.org/10.1115/1.4027566
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