Institut Francais Du Pe'trole

Imperial Chemical Industries Limited

Ifp Energies Nouvelles

Rhodia Operations

Benjamin Herzhaft

Annie Audibert

Herve Adam

Christine Dalmazzone

Lionel Rousseau

Patrick Gateau

Dominique Labarre

James Wilson

Marcel Ropars

Eric Lecolier

Neil Grainger

Jean-Francois Argillier

Brigitte Bazin

Jean-François Argillier

Thierry Huard

Yannick Peysson

Annie Audibert Hayet

Hervé Adam

Bernard Duperray

Olivier Vincke

David Pasquier

Laurent Neau

Mark White

Laurent Perier

Laurent Cangemi

The invention relates to a copolymer having: The invention also relates to a method for preparing such a copolymer, an inhibitor composition including such a copolymer, and a method for inhibiting inorganic deposits in a petroleum reservoir by means of said inhibitor composition.

Copolymer for inhibiting inorganic deposits

The present invention relates to a method for determining the kinetics of gas hydrate formation in a fluid comprising water, wherein the following stages are carried out:

Method of analyzing the kinetics of gas hydrate formation in fluids

A method for estimating the quantity of COpresent in a geologic formation and a device for implementing the method include the steps of penetrating the formation by a well drilled from the surface contacting formation with a fluid that travels from the formation to the surface sampling a given quantity of return fluid at the surface and transferring it to a cell, ensuring the pH of the quantity of fluid, adding a given quantity of product acidifying the fluid to adjust the pH to a value of less than 4, and measuring the COlevel of the gas in the cell after the acidification step.

[object Object]

A well drilling method comprises removing the drilling cuttings using an aqueous drilling fluid such as a foam including a foaming agent which includes at least one mono-(aliphatic hydrocarbyl) phosphate ester. More specifically, the drilling fluid takes the form of a potassium and/or alkanolamine and/or alkylalkanolamine salt, the foam also comprising a foam stabiliser.

Well drilling method and drilling fluid

A method providing real-time determination of a thermal profile of the drilling fluid in a well from three measuring points available in the field, i.e. the injection temperature, the outlet temperature and the bottomhole temperature is disclosed. The form of the profile between these three points is defined by a type curve representative of the thermal profiles in a well under drilling, estimated from physical considerations on thermal transfers in the well.

Method of determining the thermal profile of a drilling fluid in a well

The present invention relates to a method and to a system for monitoring the evolution of the characteristics of a fluid circulating in a well ( ) for example, wherein complex dynamic viscosity measurements are performed with a suitable detector ( ) arranged on a line ( ) through which said fluid circulates, so as to obtain a law of variation of the complex dynamic viscosity &eegr;* as a function of 2&pgr;f; a rheogram of the fluid, i.e. a law of variation of the viscosity &eegr; as a function of the shear ({dot over (&ggr;)}), is deduced therefrom; Va, Vp and YV are calculated from the rheogram; these stages are repeated after a predetermined time interval; the evolution of the characteristics of the fluid is deduced from these measurements.

Continuous measurement of the rheological characteristics of well fluids

Method and device for evaluating during drilling the capacity of well fluids to form hydrates

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Suresnes, France

Benjamin Herzhaft