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Conductivity of acid etched fractures is the decisive factor of results of acidizing treatment. At present, tests for etched fracture conductivity are in all cases executed using fresh acid under fixed experimental conditions, which determines that the test results can only capture fracture conductivity of the near-wellbore zone. This paper investi...
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... of core samples. It is also found that strength weakening induced by this acid is lower than that of fresh acid, and the core sheets stay intact after fracture conductivity testing, which is key to maintaining fracture conductivity under high closure pressures. The dissolution volume of core surfaces is apparently smaller in the #3 experiments (Fig. ...
