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Abstract This paper reports results of laboratory tests on structural behavior of cement as related to zone isolation. For a commonly used tail cement, rock mechanics type tests were obtained to get detailed stress-strain behavior. Near full scale laboratory equipment was used in two tests to simulate casing-cement-formation loading and behavior downhole. The internal casing pressure was increased in one test, decreased in the other. For the casing-cement-formation combination tested, both tests showed increased gas flow through the annulus after cyclic application and bleed off of casing differential pressure greater than 5000 psi.
Jackson et al. (Mon,) studied this question.