Abstract: Disclosed is a method of modelling a subsurface volume, and a corresponding computer program and apparatus. The method comprises defining a regular planar grid of regularly arranged locations in the two dimensions substantially parallel to the surface, and calculating a plurality of one dimensional arrays, each one dimensional array extending from a different one of the regularly arranged locations, in the direction from surface to subsurface. Each of the one dimensional arrays comprises a plurality of one dimensional cells, wherein the cells are delineated according to actual geological features of the subsurface volume.

Abstract: Disclosed is a method of monitoring the behavior of a subsurface volume. The method comprises transforming a single discrete parameter or an ensemble of discrete parameters describing an attribute of the subsurface volume, each discrete parameter having N possible discrete values with N?2, into N indicator parameters each having 2 possible discrete values; for each of the two value classes of each indicator parameter, determining the anisotropic distance to a value transition interface; transforming each of the indicator parameters into a corresponding continuous parameter using the determined anisotropic distance to the value transition interface; and using the continuous parameters in a history matching process.

Abstract: Water injection flow control device, distinctive in that it comprises: a stack of discs or cone-like plates, the discs or cone-like plates as stacked or per se comprises in substance spiral shaped flow conduits, the spiral shaped flow conduits comprises at least one revolution, the spiral shaped flow conduit being turned about a central point or axis and departing or approaching said central point or axis for each revolution, at least some of said spiral shaped flow conduits comprises at least one of sections in series with alternating cross section area for flow and a section with serpentine-type shape for flow along the in substance spiral shaped flow conduits, said spiral shaped flow conduits has a fluid conduit length of at least 0.2 meter, an inlet operatively coupled to an inner or outer end of the spiral shaped flow conduits, an out-let operatively coupled to the other end of said conduits than the inlet, and a control member.

Abstract: A method and an apparatus for battery modelling. The method includes acquiring battery information from a sensor attached to a battery, the battery information including at least a terminal voltage and a load current; classifying, the battery information as effective data or ineffective data based on a phase of a battery cycle during which the battery information is acquired; identifying one or more parameters of the circuit model associated with the battery based on the effective data; and generating an estimation of a state of the battery using the circuit model having the one or more parameters identified using the effective data. Further, a circuit model is identified using effective data.

Abstract: A method and system for sizing energy storage device capacity. The method includes generating a load profile of at least an entity based on at least information acquired by a user interface, generating an ensemble of net load profiles based on at least the load profile and based on at least one energy source profile, determining values of cumulative distribution functions associated with a plurality of energy storage device capacities as a function of at least the ensemble of net load profiles, generating a graphical representation of a combination of the composite cumulative distribution functions and a cluster of equal probability line, rendering the graphical representation, and sizing a capacity of the energy storage device based on the rendered graphical representation.

Abstract: Disclosed is a method for characterizing the evolution of a sub-surface volume. The method comprises providing a first and second surveys of the reservoir with a first and second sets of seismic traces, constructing an analytic filter operable to shift one or more seismic traces in dependence of a model parameter; and performing an inversion to obtain estimates of the model parameter such that the analytic filter aligns said first survey and said second survey. The analytic filter may be a plane wave destruction filter, and be such that the model parameter is a function of the analytic filter and is not a function of one or more of said second set of seismic traces.

Abstract: An electrochemical cell includes a negative electrode comprising a first active metal, a positive electrode comprising a second active metal, and an electrolyte comprising salts of the two active metals, a salt of the cathodic metal and a salt of the anodic metal. In operation, the electrolyte composition varies such that in a charging mode the salt of the anodic salt decreases, while the salt of the cathodic salt increases, and in a discharging mode the salt of the anodic salt increases, while the salt of the cathodic salt decreases. The cell is operational for both storing electrical energy and as a source of electrical energy as part of an uninterruptible power system. The cell is particularly suited to store electrical energy produced by an intermittent renewable energy source.

Abstract: Disclosed is a method a seismic inversion for petrophysical properties of a subsurface volume comprising the steps of: obtaining petrophysical data relating to valid geological and/or dynamical scenarios, converting this data into valid combinations of elastic parameters; projecting the valid combinations of elastic parameters onto a spherical plot; and determining a penalty term from the distances between each cell of the spherical plot and the nearest valid combination of elastic parameters within the subsurface volume. Valid geological and/or dynamical scenarios comprise those which are petrophysically possible. The penalty term is then used to constrain an inversion minimizing a cost function associated with seismic mismatch between two or more seismic surveys.

Abstract: A photovoltaic module includes at least two photovoltaic cells in series, each rectangular cell including, respectively, a first rear thin film electrode, a photovoltaic stack having at least two active materials included between the rear electrode and a transparent conductive electrode made of a thin film, the electrode TC being capable of collecting and transmitting an electric current generated by the photovoltaic stack, the two photovoltaic cells being electrically connected in series by an electrical contact strip that is included between the electrode TC of the first cell and the rear electrode of the second cell. The local thickness of the electrode TC of the cell varies as a function of the distance to the electrical contact strip. Also described are methods for depositing and etching the transparent conductive film so as to simultaneously manufacture a plurality of cells for a single module.

Abstract: A method for the low-temperature production of radial electronic junction semiconductor nanostructures on a substrate, includes: a) forming on the substrate, metal aggregates capable of electronically doping a first semiconductor material; b) growing, in the vapor phase, doped semiconductor nanowires in the presence of one or more non-dopant precursor gases of the first semiconductor material, the substrate being heated to a temperature at which the metal aggregates are in the liquid phase, the growth of the doped semiconductor nanowires in the vapor phase being catalyzed by the metal aggregates; c) rendering the residual metal aggregates inactive; and d) the chemical vapor deposition, in the presence of one or more precursor gases and a dopant gas, of at least one thin film of a second semiconductor material so as to form at least one radial electronic junction nanostructure between the nanowire and the at least one doped thin film.

Abstract: A battery system that exchanges energy with an external device is provided. The battery system includes a positive electrode having a first metal or alloy, a negative electrode having a second metal or alloy, and an electrolyte including a salt of the second metal or alloy. The positive electrode, the negative electrode, and the electrolyte are in a liquid phase at an operating temperature during at least one portion of operation. The positive electrode is entirely in a liquid phase in one charged state and includes a solid phase in another charged state. The solid phase of the positive electrode includes a solid intermetallic formed by the first and the second metals or alloys. Methods of storing electrical energy from an external circuit using such a battery system are also provided.

Abstract: The invention relates to a method for measuring pressure in an underground formation containing a fluid, comprising the following consecutive steps: establishing fluid communication between a test chamber arranged in a drilling well and the underground formation, via a flowline; moving a piston in the test chamber so as to suction fluid into the test chamber; ensuring fluid isolation of the test chamber relative to the flowline; measuring the pressure in the flowline; and repeating the preceding steps. The invention also relates to a device for measuring pressure in an underground formation containing a fluid adapted for the implementation of said method.

Abstract: The disclosure relates to a method for detecting water in a tensioning buoy of a riser column of an installation located in an aquatic environment, the method including, in succession, steps of: defining a representative standard echo; emitting the ultrasonic signal on a wall of the buoy; measuring a representative response echo due to the reflection of the ultrasonic signal in the buoy; comparing the representative response echo to the representative standard echo; and determining whether water is present in or absent from the buoy from the comparison.

Abstract: A process for selectively removing hydrogen sulphide relative to carbon dioxide from a gaseous mixture containing at least hydrogen sulphide H2S and carbon dioxide CO2, includes a step of contacting the gaseous mixture with an absorbent solution including at least one amine, water, and at least one C2 to C4 thioalkanol. A use of the absorbent solution for selectively removing hydrogen sulphide relative to carbon dioxide from a gaseous mixture containing at least hydrogen sulphide and carbon dioxide, is disclosed. Disclosed is a use of at least one C2 to C4 thioalkanol as an additive in an absorbent solution including at least one amine, and water, for increasing the selectivity of the absorbent solution for the removal of hydrogen sulphide relative to carbon dioxide from a gaseous mixture containing at least hydrogen sulphide and carbon dioxide.

Abstract: A water treatment method includes: withdrawing water from the environment; filtering the withdrawn water in a membrane filtration unit; extracting a production flow from an underground formation containing hydrocarbons; separating and collecting production water from the production flow; filtering the production flow in the membrane filtration unit; collecting a treated water flow from the membrane filtration unit. An installation adapted for applying this method is also provided.

Abstract: Disclosed is a method for characterising the evolution of a sub-surface volume. The method comprises providing a first and second surveys of the reservoir with a first and second sets of seismic traces, constructing an analytic filter operable to shift one or more seismic traces in dependence of a model parameter; and performing an inversion to obtain estimates of the model parameter such that the analytic filter aligns said first survey and said second survey. The analytic filter may be a plane wave destruction filter, and be such that the model parameter is a function of the analytic filter and is not a function of one or more of said second set of seismic traces.

Abstract: Disclosed is a method for characterising the evolution of a subsurface volume over time. The method comprises providing a first and second surveys of the reservoir with a first and second sets of seismic traces, performing an inversion to obtain estimates of changes having occurred between said first time and said second time in terms of at least one model parameter; wherein the subsurface volume is divided into regions according to a high order discrete classification attributed in accordance with the region's geologic characteristics, and said inversion is constrained per region of subsurface volume. The regions of subsurface volume may be geological layers.

Abstract: The disclosure relates to a method for detecting water in a tensioning buoy of a riser column of an installation located in an aquatic environment, the method including, in succession, steps of: defining a representative standard echo; emitting the ultrasonic signal on a wall of the buoy; measuring a representative response echo due to the reflection of the ultrasonic signal in the buoy; comparing the representative response echo to the representative standard echo; and determining whether water is present in or absent from the buoy from the comparison.