Schlumberger Technology Corporation

Enertec

Michel V Berard

Ibrahim Babelli

Kamal Babour

Gerard Segeral

Michael John Williams

Gary Martin Oddie

Philip S Cheung

Isabelle M Dubourg

Pierre Eisenmann

Yoshinobu Jinzaki

Herve Chappellat

Systems and methods are disclosed for measuring and/or monitoring concentrations of a dispersed phase in a fluid. A wettable surface may be used that is configured to be selectively wettable by the dispersed phase in the fluid being tested/monitored and the amount of or the rate of change of the wetting/deposition of the dispersed phase on the wettable surface is sensed and used to monitor the concentration of the dispersed phase.

System and method for measuring or monitoring of a low concentration dispersed phase

An in-line flow separator comprises an uphill section of pipeline which, in use, carries a gravitationally stratified flow of a first liquid and a second denser liquid. The second liquid forms a sump extending uphill from the foot of the uphill section, and an interface between the first and second liquids on the uphill section is inclined from the horizontal. An extraction port in the pipeline extracts the second liquid from the sump.

In-line flow separation of fluids in a pipe separator

An in-line flow separator () comprises an uphill section () of pipeline which, in use, carries a gravitationally stratified flow of a first liquid () and a second denser liquid (). The second liquid () forms a sump () extending uphill from the foot of the uphill section (), and an interface between the first and second liquids on the uphill section is inclined from the horizontal. An extraction port () in the pipeline extracts the second liquid from the sump.

A system is provided for measuring flow in a pipeline which, in use, carries a stratified flow of a first liquid and a second, denser liquid. The system comprises: a section of the pipeline in which the stratified flow is uphill; a section of the pipeline in which the stratified flow is downhill; and a holdup meter on each of said pipeline sections for measuring the holdup in each section. The flow rates of the first and second liquids can be calculated from the measured holdups.

System and method for measuring flow in a pipeline

The invention relates to a flow rate measurement method adapted to oil effluents made up of multiphase fluid mixtures comprising water, oil, and gas. The effluent is passed through a Venturi in which the effluent is subjected to a pressure drop (&Dgr;p), a mean value (<&Dgr;p>) of the pressure drop is determined over a period t corresponding to a frequency f that is low relative to the frequency at which gas and liquid alternate in a slug flow regime, a mean value (<&rgr; >) is determined for the density of the fluid mixture at the constriction of the Venturi over said period t , and a total mass flow rate value <Q> is deduced for the period t under consideration from the mean values of pressure drop and of density.

Method and apparatus for measuring oil effluent flow rates

The invention relates to a flow section for measurements concerning oil well effluent, the section comprising a pipe in parallel with a pipe connected to the well head. The flow section includes elements of material having low attenuation for gamma rays fixed in recesses formed in the wall of the pipe on its inside, and protection members disposed in housings connecting said recesses respectively to the outside, said housings being suitable for receiving gamma ray attenuation measuring means after the protection members have been removed.

Measurement flow section for oil well effluents and system including such a section

A method of determining a depth correction for a logging tool that is moved, while suspended from a cable, along a well, the method being of the type in which a measurement of tool depth is performed at the surface at successive instants, the tool comprising at least two sensors suitable for measuring a characteristic of the well at each instant said two sensors being offset longitudinally in the displacement direction of the tool. The method comprises, at each of said instants:

Method and apparatus for determining a depth correction for a logging

The invention relates to a method of correcting the measurements of a pressure gauge for the influence of temperature transients. In a preferred embodiment, a correction term is added to the pressure value measured at an instant t, the correction term A.sub.O [T(t+.tau.)-T(t)] being proportional to the difference between the temperature T(t+.tau.) measured after a time interval of duration .tau. has elapsed from instant t, and the temperature T(t) at instant t. The invention is applicable to measurements in oil wells.

Method and apparatus for correcting a pressure measurement for the

A method and device for evaluating an angle A known by at least two trigonometric functions and capable of varying over a range greater than 360.degree.. Two counter integers N.sub.0, N.sub.1 are stored and up-dated, each with respect to the other, as a function of even and odd indicator signals FC.sub.2, FS.sub.2. The value of the angle A, expressed in quarter turns, is given by the first or the second counter number as a function of the value of the even indicator signal FC.sub.2.

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Palaiseau, France

Michel V Berard