Abstract: Process intended for enhanced recovery of a petroleum fluid by combined injection of an aqueous phase saturated with acid gases. The process esentially consists in continuously injecting, into the oil reservoir, a mixture of an aqueous phase and of a gas at least partially soluble in the aqueous phase and at least partially miscible with the petroleum fluid, by controlling the ratio of the flow rates of the aqueous phase and of the gas so that the latter is always in a state of saturation or oversaturation at the bottom of the injection well(s). The aqueous phase saturated or oversaturated with gas comes into contact with the petroleum fluid present in the reservoir. The gas dissolved in the aqueous phase is at least partially transferred to the liquid hydrocarbon phase, thus causing swelling and viscosity reduction of this phase, which favors migration of the petroleum fluid towards a production zone.

Abstract: The invention is a structure for inhibiting the turbulence phenomena of a fluid, exhibiting a surface geometry comprising at least one series of inhibition surfaces which inhibit turbulence present in a boundary layer of the fluid in proximity to the wall of the structure and which extend substantially longitudinally in the direction of flow of the fluid. The inhibition surfaces comprise at least a first series of surfaces (01) of amplitude a1 and at least a second series of surfaces (02) of amplitude a2. The second series of surfaces (02) is arranged so as to be superposed on the first series of surfaces (01), the first series of surfaces (01) allowing inhibition of at least turbulence of great amplitude and the second series of surfaces (02) allowing inhibition of at least turbulences of low amplitude. The structure has an application for forming at least part of a pipe for conveying a pressurized gas.

Abstract: The invention is a device for processing a fluid F comprising at least one fraction A to be separated, the fraction to be separated being soluble in a solvent phase. The device includes at least one delivery for the fluid F to be processed; at least one delivery for the solvent phase; at least one two-phase compression device providing homogenization of the fluid F and the solvent phase which dissolves most of the fraction A in the solvent phase and produces a mixture of a solution F1 comprising of solvent phase S and the fraction A dissolved in the solvent phase, and of a fluid F1 which has been depleted of most of the fraction A; and a separation device coupled to an output of the at least one two-phase compression device which discharges respectively solution F1 comprising the solvent phase and the fraction A dissolved in the solvent phase and fluid F2.

Abstract: A method allowing a gaseous mixture such as a natural gas to be liquefied by using a first compressed coolant mixture M.sub.1, at least partially condensed by cooling with the aid of an external coolant fluid, then subcooled, expanded, and vaporized, and a second compressed coolant mixture, cooled with the aid of an external coolant fluid, then cooled by heat exchange with the first coolant mixture M.sub.1 during the first cooling stage (I), after which it is in an at least partially condensed state. The second partially condensed coolant mixture is sent without phase separation to a second cooling stage (II) where it is fully condensed, expanded, and vaporized at at least two pressure levels. The subcooled natural gas is expanded to form the LNG produced.

Abstract: Method of liquefying a natural gas wherein a first coolant mixture M.sub.1 is used for the first cooling stage and a second coolant mixture M.sub.2 for the second cooling stage, said mixture M.sub.2 being cooled in the first cooling stage by means of the first coolant mixture (by vaporization after expansion) in order to obtain a condensed, single-phase mixture M.sub.2 at the outlet and in that mixture M.sub.2 is vaporized to cool the second cooling stage at least partially.

Abstract: Described is a process for degasolining by refrigeration of a gas containing condensable hydrocarbons, which is effected in the presence of methanol to avoid the formation of hydrates, said process making it possible to at least partially recover the methanol entrained in the gas, by washing same by means of a liquid hydrocarbon fraction. The process described thus makes it possible to avoid having to compensate for the loss of methanol by a continuous make-up, as is the case with conventional processes. It accordingly enjoys enhanced levels of performance and economy.

Abstract: A method of treating a fluid containing at least methane and at least one acid gas and producing the acid gas or gases in liquid form. The method includes a step of regenerating the solvent, operated at a pressure whose value is at least equal to the bubble pressure of the mixture of acid gases produced in liquid form, a step in which the gaseous fraction from the regeneration step is rectified in a contact zone by separating at least some of the solvent from the gaseous fraction, a step in which the gaseous fraction from the modification step is cooled to a given temperature to cause at least some of the gaseous faction to condense forming at least one liquid fraction enriched with liquid acid gases and a step during which the liquid fraction of gases is separated from the remaining gaseous fraction.

Abstract: A process for preventing the formation of a solid phase from hydrocarbons and water in a fluid is disclosed. A physical disturbance is transmitted to the fluid intermittently in time to prevent the formation of crystalline bonds in the fluid.

Abstract: A method for transporting a fluid, for instance gas under pressure, in a pipe while reducing head loss to a minimum, comprises injecting into the pipe a fraction of a liquid with a predetermined flow rate so that the combination formed by the gas flow and the injected liquid fraction has the form of a ring-shaped control flow over at least the length of the pipe, and on delivery separating the injected liquid fraction from the gas under pressure.

Abstract: Process for treating a gas comprising one or more constituents to be separated, wherein the gas to be processed (G) is mixed at least partly with a solvent S selected to selectively retain at least part of the gas constituents to be separated, the mixture of gas (G) and of solvent (S) is cooled by circulating in at least one heat exchange zone so as to obtain, at the outlet of said heat exchange zone, at least a gas phase (G.sub.1) depleted in at least one of the constituents to be separated and a solvent phase (S.sub.1) enriched in said constituents, said enriched solvent phase (S.sub.1) is separated from said gas phase (G.sub.1) and it is recycled to the heat exchange zone in order to cool said gas-solvent mixture (stage b), said solvent phase (S.sub.1) consisting, at the outlet of the heat exchange zone, of at least a gas phase (G.sub.2) enriched in the constituents to be separated and of a liquid solvent phase (S), the gas phase (G.sub.

Abstract: Method for producing and/or transporting by pipeline, from a location such as a reservoir to a point of destination, a multi-phase fluid susceptible to the formation of hydrates under given thermodynamic conditions. During production and/or transportation, at least one relationship is determined between at least two physical parameters associated with hydrate formation, such as the pressure P, the temperature T and/or a parameter associated with the composition of the fluid or the composition of the fluid itself, the said relationship defining at least one range within which hydrates form. At least one of the physical parameters is measured and, using the relationship and/or the established formation range and a processing and control device, at least one of the physical parameters is adjusted in order to bring and/or maintain the fluid outside the hydrate formation range.

Abstract: A method of treating gas containing water in order to remove at least part of the water from the gas, including feeding the natural gas to be treated by a first line, with a liquid fraction containing at least an aqueous phase is fed via a second line in the presence of a solvent into a contact zone, so as to bring the gas into direct contact with the liquid fraction over at least a portion of the contact zone. The solvent is a non-hydrocarbon compound other than water, and simultaneously, the gas is cooled in the presence of the solvent in order to condense at least one liquid phase consisting essentially of water in a mixture with the solvent.

Abstract: A method of conveying a fluid (I) in a pipeline, the pipe having a porous structure or a porous lining into which a fluid (II) which is at least partially immiscible with the conveyed fluid is injected. A pipeline for conveying a fluid (I) having a porous structure or a porous lining allowing a fluid (II), which is at least partially immiscible with the fluid (II), to be retained in the pores.

Abstract: A process for transporting a fluid in a pipe under conditions where hydrates may form. In the process, the pipe fluid contains at least one of a gaseous hydrocarbon or liquid hydrocarbon and water and the water content is less than the liquid hydrocarbon content. The process includes the steps of 1) adding a dispersive additive in a hydrocarbon solution to the fluid to be transported, so as to form an emulsion, 2) transporting the liquid and gaseous hydrocarbons in the presence of water and the hydrates, 3) separating the gas phase, the hydrocarbon liquid in excess and a liquid hydrocarbon phase comprising the hydrates and the dispersing additive, and 4) separating the liquid hydrocarbon phase comprising the hydrates and the dispersing additives.

Abstract: A process for treating a gas containing methane, at least one higher hydrocarbon and water to eliminate the water and/or extract the higher hydrocarbon(s) comprises dividing the gas to be treated into at least two fractions each of which undergo at least one cooling step, and bringing an aqueous phase fraction obtained after cooling into contact with the gas to be treated. The treatment process uses units with reduced floor space and weight.

Abstract: A process for treating a gas containing methane, at least one higher hydrocarbon and water to eliminate the water and extract the higher hydrocarbon(s) comprises:a) separating the gas to be treated into two streams (1) and (2);b) bringing at least stream (2) into contact with a recycled liquid phase comprising water and a solvent, to obtain an aqueous liquid phase which is depleted in solvent and a gas phase which is charged with solvent;c) separating the aqueous phase which is depleted in solvent and the gas phase which is charged with solvent;d) bringing said aqueous phase which is depleted in solvent into contact with one of the solvent-free gas streams defined at (a), the solvent being extracted from the depleted aqueous phase by the gas, and recovering a gas phase which is rich in solvent and a regenerated aqueous liquid phase;e) mixing the gas phase with either the gas phase from step (b) or the stream (2) upstream of contact step (b);f) cooling the gas phase from the mixing step so as to partially cond

Abstract: The process allows to liquefy a gaseous mixture consisting at least partly of a mixture of hydrocarbons, such as a natural gas, by using a cooling mixture that is obtained, after a first cooling step, in a state referred to as "condensed single-phase" state.

Abstract: Process for transporting gas hydrates formed from a natural gas or from a condensate gas, consisting in using a dispersing additive, possibly coupled with a film-forming additive, in solution in a liquid hydrocarbon fraction, this liquid hydrocarbon fraction participating in the formation of an emulsion and/or of a suspension with the condensation water produced and the hydrates. The dispersing additive is recycled after the transportation of the hydrates in the pipe.

Abstract: A process for the treatment of natural gas that contains an odorant at a storage site is described, with this process including a storage phase and a draw-down phase which involve at least two adsorbers A and B and in which, during the storage phase, the odorant is extracted from the gas and, during the draw-down phase; the water and H.sub.2 S that are contained in the gas are extracted.

Abstract: A method of treating a gas, for example, natural gas containing at least one hydrocarbon and at least one acid gas to remove the acid gas from the natural gas and to produce at least one concentrated acid gas, wherein the gas is subjected to at least two stages of absorption using polar solvents having different properties.