Apparatus for use when gathering parameters from a well flow and also a method of using same

Abstract

An apparatus ( 3 ) for use when gathering parameters from a well flow in a petroleum well ( 1 ) in order to be able to evaluate the flow and productivity or injectivity of the well is described, the apparatus ( 3 ) including: —a semi-rigid rod ( 5 ) arranged in a manner allowing it to sense the temperature profile of the well ( 1 ); —at least two mutually spaced-apart measuring devices and/or fluid phase indicators ( 9 ) attached to the semi-rigid rod ( 5 ); and —at least one pressure sensor ( 11 ) arranged in a manner allowing it to sense pressure in the well ( 1 ), whereby the amounts of water, oil and gas from one or more formation sections may be quantified. A method of using the apparatus is also described.

1 . An apparatus for use when gathering parameters from a well flow in a petroleum well for allowing evaluation of the flow and productivity or injectivity of the well continuously for a period of time, the apparatus including:
 a continuous, semi-rigid rod arranged in a manner allowing it to sense the temperature profile of the well;   at least two mutually spaced-apart fluid phase indicators attached to the continuous, semi-rigid rod; and   at least one pressure sensor arranged in a manner allowing it to sense pressure in the well, characterized in that the at least two mutually spaced-apart fluid phase indicators are disposed around the semi-rigid rod, the fluid phase indicators being arranged for detecting and quantifying the velocity and density of the fluid; and that each of the mutually spaced-apart fluid phase indicators comprise trace elements and/or chemicals that are arranged in a manner allowing them to be separated from each other, and that the fluid phase indicators are simultaneously affected by the well flow.   
   
   
       2 . The apparatus in accordance with  claim 1 , characterized in that the semi-rigid rod includes a fibre cable. 
   
   
       3 . The apparatus in accordance with  claim 1 , characterized in that the semi-rigid rod includes a plurality of spaced-apart pressure sensors. 
   
   
       4 . The apparatus in accordance with  claim 1 , characterized in that the apparatus includes an additional pressure sensor for compression-measuring of the end portion of the apparatus in the well, the additional pressure sensor being placed between the semi-rigid rod and a bull nose ( 13 ) placed at the end of the apparatus in the well. 
   
   
       5 . The apparatus in accordance with  claim 1 , characterized in that the apparatus is arranged in a manner allowing it to communicate measuring data through the fibre and out of the well while measuring is in progress. 
   
   
       6 . Apparatus in accordance with  claim 5 , characterized in that measuring data from the semi-rigid rod and elements from the fluid phase indicators are conveyed from the well independently of each other. 
   
   
       7 . Apparatus in accordance with  claim 1 , characterized in that the apparatus includes a depth-measuring device. 
   
   
       8 . A method of gathering parameters from a well flow in a petroleum well for allowing evaluation of the flow and productivity or injectivity of the well, characterized in that the method includes the steps of:
 inserting an apparatus according to  claim 1  to a desired portion of the well; and   keeping the apparatus substantially stationary within the well during gathering of parameters related to flow, fluid phase and pressure from one or more formation sections of the well.   
   
   
       9 . The method in accordance with  claim 8 , characterized in communicating results from the measuring devices and elements from the fluid phase indicators to the surface for further processing while the fluid phase indicators are stationary in the well. 
   
   
       10 . The method in accordance with  claim 9 , characterized in conveying measuring data from the semi-rigid rod and elements from the fluid phase indicators independently of each other from the well.