Methods and systems for monitoring near-wellbore and far-field reservoir properties using formation-embedded pressure sensors

Abstract

A method for measuring formation property includes obtaining a set of measurements indicative of wellbore pressures for a selected duration after a pressure perturbation is created in a wellbore; obtaining at least one additional set of measurements indicative of formation pressures for the selected duration after the pressure perturbation; and deriving the formation property based on the set of measurements indicative of the wellbore pressures and the at least one additional set of measurements indicative of formation pressures. A system for measuring formation property includes a first pressure sensor disposed proximate a wellbore for measuring pressures in the wellbore; a second pressure sensor disposed in a formation at a predetermined distance from the wellbore; and a flow rate measuring device.

1 . A method for measuring formation property, comprising:
 obtaining a set of measurements indicative of wellbore pressures for a selected duration after a pressure perturbation is created in a wellbore;   obtaining at least one additional set of measurements indicative of formation pressures for the selected duration after the pressure perturbation; and   deriving the formation property based on the set of measurements indicative of the wellbore pressures and the at least one additional set of measurements indicative of formation pressures.   
   
   
       2 . The method of  claim 1 , wherein the deriving comprises calculating differences or ratios between the first set of measurements and the at least one additional set of measurements. 
   
   
       3 . The method of  claim 1 , wherein the formation property relates to a near wellbore hydraulic resistance. 
   
   
       4 . The method of  claim 1 , wherein the formation property is a far field formation property. 
   
   
       5 . The method of  claim 4 , wherein the far-field formation property relates to a reservoir boundary. 
   
   
       6 . The method of  claim 1 , wherein the deriving involves using a Homer curve or a Bourdet curve. 
   
   
       7 . A system for measuring formation property, comprising:
 a first pressure sensor disposed proximate a wellbore for measuring pressures in the wellbore;   a second pressure sensor disposed in a formation at a predetermined distance from the wellbore; and   a flow rate measuring device.   
   
   
       8 . The system of  claim 7 , further comprising a third pressure sensor disposed in the formation in the same zone as the second pressure sensor, but at a location different from that of the second pressure sensor. 
   
   
       9 . The system of  claim 8 , wherein the second pressure sensor and the third pressure sensor are disposed at azimuthally different locations relative to the wellbore. 
   
   
       10 . The system of  claim 9 , wherein the second pressure sensor and the third pressure sensor have an azimuthal angle separation of about 180 degrees relative to the wellbore.