The present disclosure relates to systems and methods for measuring oil/water content in oil-water mixtures, regardless of the salinity of the mixture and regardless of air in the sensor pipe. In some embodiments, the oil content is measured using a dielectric sensor. It is determined whether the oil content is above or below a threshold. If the oil content is above the threshold, the oil content is reported using the measurement from the dielectric sensor. If the oil content is below the threshold, the oil content is reported using the measurement from the eddy current sensor. In some embodiments, which improve performance when there is air in the sensor pipe, two dielectric sensors with different geometries are used instead of the one dielectric sensor.

Detection and sampling of dissolved hydrocarbons of interest in an environment expected to have hydrocarbon molecules, such as a water column or interstitial water in sediment. An apparatus comprising at least one oleophilic film frame is deployed into the environment and the at least one oleophilic film frame is exposed thereto for a defined period of time, and thereafter isolated from the environment to cease exposure thereto. Hydrocarbon molecules scavenged by the oleophilic film may be analyzed to determine their type and/or concentration.

Systems, methods, and apparatuses for detecting and collecting fluids released into a body of water are disclosed. Particularly, detection and collection of a fluid released during a petroleum exploration or production operation are disclosed. A released fluid may be detected using sensors on a submersible vehicle (SV) or a plurality of SVs operating in concert. A detected released fluid is collected in storage tanks onboard of the one or more SVs or in an external tank coupled to the one or more SVs.

Provided are low flow groundwater fluid sampling systems and related methods of collecting fluid samples, including a low flow pump, flow cell, waste container and a communication device in communication with those components. In this manner, the low flow pump may be controlled to ensure a desired constant flow-rate is achieved, and a remote operator may monitor the status of fluid being pumped to the flow cell with the communication device, such as with a portable electronic device, including a smart phone. The system may alert the operator that fluid is ready to be collected for sampling, including at an off-site laboratory. Particularly useful applications are for monitoring groundwater quality and contamination.

Systems and methods for analyzing groundwater samples with multiple organic tracer species from a petroleum containing reservoir include obtaining the sample, isolating an aqueous fraction of the groundwater sample, separating the aqueous fraction into a plurality of components, where each component corresponds to a different one of the organic tracer species, combining each of the separated components with at least one lanthanide element to form a plurality of component solutions, where a ratio of the at least one lanthanide element to the separated component in each component solution is 5:1 or greater, and analyzing each component solution to determine a relative amount of each organic tracer species in the groundwater sample.

The invention relates to a method for analysing hydrocarbons, comprising: the implementation of a gas chromatography separation according to a first controlled temperature profile, to separate a sample into a plurality of analytes; the detection of at least one of said analytes by measurement of a variation of the resonance frequency of at least one resonator of nano-electromechanical system (NEMS) type covered with a functional layer made to vibrate at the resonance frequency thereof, under the effect of an adsorption or desorption of the analyte by the functional layer, said method being characterised in that the resonator is subjected to a second controlled temperature profile, lower than the first profile.

Disclosed is an apparatus for determining a concentration of a substance in a liquid medium of a test sample. The apparatus comprises a light source for directing a light beam of a first wavelength range towards the test sample, and a first detector for measuring intensity of irradiation emitted from the liquid medium at a second wavelength characteristic for the liquid medium . The apparatus further comprising a second detector for measuring intensity of irradiation emitted from the substance at a third wavelength characteristic for the substance, and a determining unit for determining the concentration of the substance in the liquid medium based on the measured intensities of the irradiation collected at the second wavelength and at the third wavelength. Further, the apparatus is arranged such that the irradiation collected by the first detector is emitted from a first surface area of the test sample and the irradiation collected by the second detector is emitted from a second surface area, which first and second areas are at least partly covered by a surface area of the test sample illuminated by the light beam of the light source.

A molecular spectrophotometric method of high precision and accuracy for determining concentration of oil-derived hydrocarbons in water is described. The method allows to obtain direct measurements of oil mass concentration in a water sample and uses environmentally friendly solvents.

An apparatus for discriminating between liquids having differing thermal conductivities includes a thermally conductive substrate, a resistor and a thermistor mounted to the thermally conductive substrate. Two leads on the resistor enable a current to be passed through the resistor to generate heat, and two leads on the thermistor enable a current to be passed through the thermistor to generate a datum indicative of thermistor temperature. An electrical insulator encapsulates the resistor, the thermistor and part of the thermally conductive substrate. A remainder of the thermally conductive substrate may extend beyond the electrical insulator to provide a thermal path from the resistor and thermistor to a liquid in which the apparatus may be immersed.

Embodiments relate to instrumentation configuration for emergency response. Initially, instrument profiles are obtained from an instrument data source, where each instrument profile corresponds to an instrument for emergency response. Criteria are applied to each of the instrument profiles to determine performance scores for the instruments. Scenario sensors are used to collect real-time measurements at a geographic location of an emergency. At this stage, scenario parameters comprising the real-time measurements are obtained from a scenario data source. Each instrument profile is evaluated based on the scenario parameters to determine a suitability index. The performance score and the suitability index of each instrument profile is combined to determine an instrument rating. An instrument subset is selected from the instruments based on the instrument ratings. An instrumentation configuration for the instrument subset is generated, where the instrumentation configuration is used to deploy at least one instrument on a response vehicle or instrument platform.