Abstract: Systems and methods may determine carbonate content in rock samples and may include shaking a calcimeter having a reaction chamber including at least one pressure sensor and an acid cup with a rock sample therein and recording a first pressure value at or after a first time duration of shaking, wherein the first pressure value is indicative of first gas pressure within the reaction chamber at or after the first time duration of shaking. The systems and methods may also record a second pressure value at or after a second time duration of shaking, wherein the second pressure value is indicative of second gas pressure within the reaction chamber at or after the second duration of shaking, and calculate a carbonate content in the rock sample based on at least one of the recorded first pressure value and the recorded second pressure value.

Abstract: A method for estimating a quantity of natural hydrogen in a subterranean formation includes degassing drilling fluid obtained from a wellbore to obtain a gas sample including a quantity of hydrogen gas, measuring a concentration of hydrogen in the gas sample, and applying a correction to the measured concentration of hydrogen to estimate the quantity of natural hydrogen in the subterranean formation.

Abstract: An apparatus for making fast gas chromatography measurements of an oilfield gas includes an infrared laser configured to emit an infrared laser beam; an infrared sensor configured to receive the infrared laser beam; a Fabry-Perot gas cell deployed in a path between the infrared laser and the infrared sensor such that the infrared laser beam passes through the gas cell, the gas cell configured to receive the gas sample; a gas chromatography column assembly including an input port, a gas chromatography column, and an output port, the gas chromatography column assembly configured to provide the gas sample to the Fabry-Perot gas cell; and a controller in electronic communication with the infrared sensor and configured to process the received infrared laser beam to estimate a composition of the gas sample.

Abstract: An apparatus for making isotopic ethane measurements of a gas sample includes a tunable infrared laser configured to emit an infrared laser beam; an infrared sensor configured to receive the infrared laser beam; a gas cell deployed in a path between the tunable infrared laser and the infrared sensor such that the infrared laser beam passes through the gas cell, the gas cell configured to receive the gas sample; and a controller configured to evaluate the received infrared laser beam to estimate a ratio of C13 ethane to C12 ethane in the gas sample.

Abstract: A method for estimating a differential lag time while drilling includes introducing a multiphase tracer into drilling fluid circulating in a wellbore while drilling. The multiphase tracer includes a solid tracer and a fluid tracer in which the fluid tracer includes at least one of a liquid tracer or a gaseous tracer. A first arrival time of the solid tracer and a second arrival time of the fluid tracer are measured at a surface location and evaluated to estimate the differential lag time. The differential lag time includes at least one of a difference between a cuttings lag time and a gaseous lag time or a difference between the cuttings lag time and a liquid lag time.

Abstract: An apparatus for making isotopic ethane measurements of a gas sample includes a tunable infrared laser configured to emit an infrared laser beam; an infrared sensor configured to receive the infrared laser beam; a gas cell deployed in a path between the tunable infrared laser and the infrared sensor such that the infrared laser beam passes through the gas cell, the gas cell configured to receive the gas sample; and a controller configured to evaluate the received infrared laser beam to estimate a ratio of C13 ethane to C12 ethane in the gas sample.

Abstract: A method for determining a mineralogical composition of a geological formation sample includes measuring a mineralogical composition of the sample and measuring an elemental composition of the sample. The mineralogical composition is processed to compute a predicted elemental composition of the sample based on known elemental compositions of predetermined minerals. The measured mineralogical composition is corrected to obtain a corrected mineralogical composition which is in turn processed to compute a corresponding corrected predicted elemental composition of the sample. The measured elemental composition is compared with the predicted elemental compositions to obtain error indicators. The error indicators are compared and evaluated to selected and output one of the measured or corrected measured mineralogical compositions.

Abstract: The disclosure relates to a method of analyzing at least a rock sample extracted from a geological formation. The method comprises: heating the at least one rock sample under inert atmosphere with a temperature below 300° C. and with a flow of inert gas to remove contaminants, analyzing at least one of the decontaminated rock samples and determining at least a property relative to non-volatile organic matter contained in the geological formation based on the analysis.

Abstract: A system for analyzing gas extracted from drilling fluid is provided. In one embodiment, the system includes a gas extractor having a gas extraction chamber within a gas extractor housing and a gas outlet for gas separating from the drilling fluid within the gas extraction chamber. Further, the system includes a gas analyzer, which has an optical analyzer and an optical source that are situated outside of the gas extractor. A gas analysis zone is in fluid communication with the gas extraction chamber and is optically connected via at least one fiber optic cable to the optical source and the optical analyzer. Additional methods, systems, and devices are also disclosed.

Abstract: A system for analyzing gas extracted from drilling fluid is provided. In one embodiment, the system includes a gas extractor having a gas extraction chamber within a gas extractor housing and a gas outlet for gas separating from the drilling fluid within the gas extraction chamber. Further, the system includes a gas analyzer, which has an optical analyzer and an optical source that are situated outside of the gas extractor. A gas analysis zone is in fluid communication with the gas extraction chamber and is optically connected via at least one fiber optic cable to the optical source and the optical analyzer. Additional methods, systems, and devices are also disclosed.

Abstract: The disclosure relates to a method of analyzing at least a rock sample extracted from a geological formation. The method comprises: heating the at least one rock sample under inert atmosphere with a temperature below 300° C. and with a flow of inert gas to remove contaminants, analyzing at least one of the decontaminated rock samples and determining at least a property relative to non-volatile organic matter contained in the geological formation based on the analysis.

Abstract: The disclosure relates to determining a mineralogical composition of a geological sample, comprising estimating mineralogical and elemental compositions of the sample using measurements.

Abstract: The general field of the invention is that of matter-wave gravimeters. The gravimeter according to the invention comprises at least: means for generating, for capturing and for cooling a cloud of ultra-cold atoms; means of transferring the atoms into a superposition, with equal weights, of a first internal electronic state called state |1>) and of a second internal electronic state called state |2> comprising the application of at least a first microwave field and of a radiofrequency field; means for separating the atoms into two wave packets for a given period of time under the effect of at least a second microwave field, the said separation leading to a phase-shift associated with the local gravitational field; calibration means allowing a “magic” magnetostatic field to be determined for which the difference in energy between the first internal electronic state and the second internal electronic state is independent, to a first order, of the fluctuations of the magnetostatic field.

Abstract: The general field of the invention is that of matter-wave gravimeters. The gravimeter according to the invention comprises at least: means for generating, for capturing and for cooling a cloud of ultra-cold atoms; means of transferring the atoms into a superposition, with equal weights, of a first internal electronic state called state |1>) and of a second internal electronic state called state |2> comprising the application of at least a first microwave field and of a radiofrequency field; means for separating the atoms into two wave packets for a given period of time under the effect of at least a second microwave field, the said separation leading to a phase-shift associated with the local gravitational field; calibration means allowing a “magic” magnetostatic field to be determined for which the difference in energy between the first internal electronic state and the second internal electronic state is independent, to a first order, of the fluctuations of the magnetostatic field.