Abstract: An example method for determining downhole conditions in a subterranean formation during a drilling operation may include introducing non-formation gas into a flow of drilling fluid through a fluid conduit in fluid communication with a drill string disposed within a borehole in the subterranean operation. The non-formation gas may be received from the flow of drilling fluid through a return line in fluid communication with the borehole. A downhole condition may be determined based, at least in part, on the received non-formation gas.

Abstract: A method for downhole formation evaluation includes extracting a fluid sample from a drilling fluid using a controlled gas separator. The evaluation further includes extracting a plurality of individual chemical species from the fluid sample, wherein the individual chemical species include methane, ethane, propane, and CO2 and identifying isotope concentrations in each of the individual chemical species. Identified isotope concentrations in each of the individual chemical species are output for a first time period.

Abstract: Systems and methods for monitoring and characterizing well bores, subterranean formations, and/or fluids in a subterranean formation using well evaluation pills are provided. In one embodiment, the methods comprise: introducing a well evaluation pill into a portion of a well bore penetrating a portion of a subterranean formation; allowing the well evaluation pill to interact with one or more components in the portion of the subterranean formation; detecting a change in the composition or properties of the well evaluation pill; and determining the presence of one or more components in the portion of the subterranean formation based at least in part on the detected change in the composition or properties of the well evaluation pill.

Abstract: An example method for analyzing drilling fluid used in a drilling operation within a subterranean formation may comprise placing a TOF-MS in fluid communication with a drilling fluid. The drilling fluid may be flowing through a fluid conduit coupled to a drilling assembly. A chemical composition of the drilling fluid may be determined using the TOF-MS. And a formation characteristic may be determined using the determined chemical composition.

Abstract: An example method for determining down-hole conditions in a subterranean formation during a drilling operation may include introducing non-formation gas into a flow of drilling fluid through a fluid conduit in fluid communication with a drill string disposed within a borehole in the subterranean operation. The non-formation gas may be received from the flow of drilling fluid through a return line in fluid communication with the borehole. A downhole condition may be determined based, at least in part, on the received non-formation gas.

Abstract: A method for downhole formation evaluation includes extracting a fluid sample from a drilling fluid using a controlled gas separator. The evaluation further includes extracting a plurality of individual chemical species from the fluid sample, wherein the individual chemical species include methane, ethane, propane, and CO2 and identifying isotope concentrations in each of the individual chemical species. Identified isotope concentrations in each of the individual chemical species are output for a first time period.

Abstract: Systems and methods for monitoring and characterizing well bores, subterranean formations, and/or fluids in a subterranean formation using well evaluation pills are provided. In one embodiment, the methods comprise: introducing a well evaluation pill into a portion of a well bore penetrating a portion of a subterranean formation; allowing the well evaluation pill to interact with one or more components in the portion of the subterranean formation; detecting a change in the composition or properties of the well evaluation pill; and determining the presence of one or more components in the portion of the subterranean formation based at least in part on the detected change in the composition or properties of the well evaluation pill.

Abstract: Methods and systems are disclosed to determine total hydrocarbons from fluid-carrying fluids and solids from a geological formation during downhole operations. Gas extraction at a well site occurs through a gas extractor at a set pressure, detected temperature, detected density, and controlled volume rate. The quantities of various components of interest are determined from samples of fluid influent and effluent from the wellbore by solving a system of equations of state using a group contribution equilibrium model. Knowing approximate chemical compositions of the liquid fluid and solid phases before contamination with formation materials, with the detection of the gas phase and description of the solid phase from the geological formation, to allows for determination of total detectable hydrocarbons from geological formations at the surface, and their concentrations to be expressed as mole or mass fraction for materials coming from a wellbore while downhole operations.

Abstract: An example method for analyzing drilling fluid used in a drilling operation within a subterranean formation may comprise placing a TOF-MS in fluid communication with a drilling fluid. The drilling fluid may be flowing through a fluid conduit coupled to a drilling assembly. A chemical composition of the drilling fluid may be determined using the TOF-MS. And a formation characteristic may be determined using the determined chemical composition.