Abstract: A method for monitoring microbial levels in a wellbore fluid is provided. The method includes collecting a wellbore fluid sample, recovering ATP from the wellbore fluid sample, using the recovered ATP in an ATP-mediated oxidation of luciferin to oxyluciferin to yield photons, quantifying the photons, correlating the quantified photons to an ATP concentration, comparing the ATP concentration to predetermined action levels, and taking countermeasures when the ATP concentration exceeds the predetermined action levels.

Abstract: Methods and systems for substantially simultaneous evaluation of rock sample permeability and porosity, and composition of formation fluids, are provided. Such methods and systems may be used to evaluate the permeability, porosity, and composition of at least a portion of a subterranean formation in a drilling operation. An example of such a method may include passing a cleaning fluid through the rock sample so as to extract at least a portion of one or more formation fluids from the rock sample in an effluent comprising the cleaning fluid and the portion of the one or more formation fluids; and determining one or more properties of the effluent so as to determine the composition of the portion of the one or more formation fluids, and so as to determine the permeability and porosity of the rock sample.

Abstract: Methods comprising providing a drill-in fluid including an aqueous carrier fluid, a surfactant; and a self-degradable filter cake-forming agent which includes a plurality of degradable particulates which are operable to form an acid upon degradation, and a plurality of acid-degradable particulates. Drilling a wellbore through a reservoir section of a subterranean formation with the drill-in fluid, forming a thin internal filter cake within the wellbore from the self-degradable filter cake-forming agent. Releasing an acid derivative from at least a portion of the plurality of degradable particulates, interacting the acid with the filter cake so as to at least partially degrade the acid-degradable particulates therein. Thereby at least partially removing the filter cake allowing quick lift off of the remaining particulates, and producing a hydrocarbon fluid or gas from the subterranean formation.

Abstract: Methods and systems for substantially simultaneous evaluation of rock sample permeability and porosity, and composition of formation fluids, are provided. Such methods and systems may be used to evaluate the permeability, porosity, and composition of at least a portion of a subterranean formation in a drilling operation. An example of such a method may include passing a cleaning fluid through the rock sample so as to extract at least a portion of one or more formation fluids from the rock sample in an effluent comprising the cleaning fluid and the portion of the one or more formation fluids; and determining one or more properties of the effluent so as to determine the composition of the portion of the one or more formation fluids, and so as to determine the permeability and porosity of the rock sample.

Abstract: Methods comprising providing a drill-in fluid including an aqueous carrier fluid, a surfactant; and a self-degradable filter cake-forming agent which includes a plurality of degradable particulates which are operable to form an acid upon degradation, and a plurality of acid-degradable particulates. Drilling a wellbore through a reservoir section of a subterranean formation with the drill-in fluid, forming a thin internal filter cake within the wellbore from the self-degradable filter cake-forming agent. Releasing an acid derivative from at least a portion of the plurality of degradable particulates, interacting the acid with the filter cake so as to at least partially degrade the acid-degradable particulates therein. Thereby at least partially removing the filter cake allowing quick lift off of the remaining particulates, and producing a hydrocarbon fluid or gas from the subterranean formation.