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.

A reaction resin mortar curable by frontal polymerization contains at least one radically polymerizable compound, at least one thiol-functionalized compound and at least one polymerization initiator, wherein the weight ratio of the at least one radically polymerizable compound and the at least one thiol-functionalized compound is in the range of 10:1 to 2:1 and wherein the polymerization initiator is selected from compounds which can be thermally activated and/or thermally released at a temperature of above 30 C. and/or ammonium persulfates which are formed in-situ from at least one organically substituted ammonium salt and at least one inorganic persulfate.

A reaction resin mortar curable by frontal polymerization contains at least one radically polymerizable compound, at least one thiol-functionalized compound and at least one polymerization initiator, wherein the weight ratio of the at least one radically polymerizable compound and the at least one thiol-functionalized compound is in the range of 10:1 to 2:1 and wherein the polymerization initiator is selected from compounds which can be thermally activated and/or thermally released at a temperature of above 30 C. and/or ammonium persulfates which are formed in-situ from at least one organically substituted ammonium salt and at least one inorganic persulfate.

This document relates to settable, hydraulic, non-Portland foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.

This document relates to settable, hydraulic, non-Portland foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.

This document relates to settable, hydraulic, non-Portland foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.

This document relates to settable, hydraulic, non-Portland foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.

This document relates to settable, hydraulic, non-Portland foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.

This document relates to settable, hydraulic, non-Portland foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.

This document relates to settable, hydraulic, non-Portland foamed cement compositions comprising nitrogen gas-generating compositions used for loss circulation control.