Biologically mediated precipitation of carbonates for use in oilfield applications
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United States of America Patent
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Dec 7, 2021
Grant Date -
Aug 29, 2019
app pub date -
Sep 28, 2017
filing date -
Sep 30, 2016
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Abstract
A method of enhancing carbonate precipitation in a downhole environment comprises introducing into the downhole environment a treatment composition comprising: a carbonate producing agent comprising a microbe, an enzyme, or a combination comprising at least one of the foregoing, and a substrate comprising N-oxyurea, semicarbazide, N,N-dioxyurea, or a combination comprising at least one of the foregoing. An organic feedstock and a geobacter can also be used to treating a wellbore or a subterranean formation. Encapsulated carbonate producing agent such as encapsulated bacterial spores are used to form self-healing cemented structure in a downhole environment.
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