Combination injection string and distributed sensing string for well evaluation and treatment control

Abstract

A method for well intervention includes extending a combination conduit into a wellbore. The combination conduit includes a first conduit for moving fluid into the wellbore and a second conduit having at least one optical sensing fiber therein. A fluid is moved into the wellbore through the first conduit. A wellbore parameter is measured through a sensor associated with the at least one optical sensing fiber.

1 . A method for well intervention, comprising:
 extending a flexible, spoolable combination conduit into a wellbore, the combination conduit including a first conduit for moving fluid into the wellbore and a second conduit having at least one optical sensing fiber therein;   moving a fluid into the wellbore through the first conduit; and   measuring a wellbore parameter through a sensor associated with the at least one optical sensing fiber.   
   
   
       2 . The method of  claim 1  wherein the wellbore parameter comprises pressure. 
   
   
       3 . The method of  claim 1  wherein the wellbore parameter comprises temperature. 
   
   
       4 . The method of  claim 3  wherein the measuring temperature is performed at a plurality of positions along the wellbore. 
   
   
       5 . The method of  claim 1  wherein the wellbore parameter comprises a parameter related to fluid level in the wellbore. 
   
   
       6 . The method of  claim 1  wherein the fluid comprises foaming agent. 
   
   
       7 . The method of  claim 1  further comprising controlling a rate of movement of the fluid in response to measurements of the wellbore parameter. 
   
   
       8 . A wellbore intervention device, comprising:
 a first conduit configured to move fluid therethrough;   a second conduit including therein at least one optical fiber; and   the first conduit and the second conduit enclosed in a spoolable, non-metallic encapsulant.   
   
   
       9 . The device of  claim 8  wherein the encapsulant comprises glass fiber reinforced plastic. 
   
   
       10 . The device of  claim 8  wherein the optical fiber comprises a distributed temperature sensing element. 
   
   
       11 . The device of  claim 8  wherein the first conduit and the second conduit are disposed in the encapsulant to thermally isolate the first conduit from the second conduit, and the second conduit is exposed to ambient temperature in the wellbore. 
   
   
       12 . The device of  claim 8  further comprising a fluid discharge control valve disposed at one end of first conduit. 
   
   
       13 . The device of  claim 8  further comprising a pressure sensor disposed at one end of the second conduit. 
   
   
       14 . The device of  claim 13  wherein the pressure sensor comprises an optical sensor. 
   
   
       15 . The device of  claim 13  further comprising a fluid pump coupled to the other end of the first conduit, and a control system in signal communication with the pressure sensor, the control system configured to operate the fluid pump such that a selected pressure is maintained in a wellbore when the intervention device is disposed in the wellbore. 
   
   
       16 . The device of  claim 8  wherein the first conduit and the second conduit comprise steel.