Method for conducting well testing operations with nitrogen lifting, production logging, and buildup testing on single coiled tubing run

Abstract

A method for performing a pressure buildup test in an evaluation zone of a well includes the steps of perforating the well in the evaluation zone to allow the flow of hydrocarbon fluids from the reservoir, deploying a pressure buildup test system into the evaluation zone, supplying the lift fluid via the coiled tubing to lift the hydrostatic pressure to lift the hydrocarbon fluids from the evaluation zone toward the surface, moving the packer to the set position, monitoring the pressure data in the evaluation zone, closing the shut-in valve when the stable state of the pressure data is reached, and measuring a buildup pressure in the evaluation zone using the pressure monitoring device. The pressure buildup test system includes a packer, a sub port, a coiled tubing, a shut-in valve, a pressure monitoring device, and a PLT.

That which is claimed is: 
     
         1 . A method for performing a pressure buildup test in an evaluation zone of a well, the method comprising the steps of:
 perforating a casing of the well in the evaluation zone, wherein perforating the casing is operable to allow the flow of hydrocarbon fluids from the reservoir to the evaluation zone;   deploying a pressure buildup test system into the evaluation zone of the well, the pressure buildup test system is configured to measure pressure in the evaluation zone, the pressure buildup test system comprises:   a packer, the packer is configured to isolate the evaluation zone when in a set position and further is configured to create an annulus between the casing of the well and the pressure buildup test system in a retracted position;   a sub port, the sub port configured to deliver a lift fluid to the evaluation zone;   a coiled tubing, the coiled tubing configured to deliver the lift fluid from the surface to the sub port, wherein the pressure buildup test system is deployed by the coiled tubing, wherein the coiled tubing comprises a cable, the cable is configured to transmit electronic signals to a surface control system from the pressure buildup test system;   a shut-in valve, the shut-in valve configured to control the flow of hydrocarbon fluids from the evaluation zone to a well space at a distance above the packer;   a pressure monitoring device, the pressure monitoring device configured to measure pressure data in the evaluation zone and transmit the pressure data to the surface control system through the cable; and   a PLT, the PLT configured to measure flow from the evaluation zone through the shut-in valve to the well space above the packer;   supplying the lift fluid via the coiled tubing to lift the hydrostatic pressure of the evaluation zone, wherein lifting the hydrostatic pressure is operable to lift the hydrocarbon fluids in the evaluation zone through the between the packer and the casing toward the surface;   moving the packer to the set position, wherein in the set position the packer contacts the casing of the well such that the hydrocarbon fluids in the evaluation zone flow through the shut-in valve to the well space;   monitoring the pressure data of the evaluation zone to determine a stable state of the pressure data;   closing the shut-in valve when the stable state of the pressure data is reached to prevent the flow of the hydrocarbon fluids from the evaluation zone; and   measuring a buildup pressure in the evaluation zone using the pressure monitoring device.   
     
     
         2 . The method of  claim 1 , wherein the lift fluid is nitrogen. 
     
     
         3 . The method of  claim 1 , further comprising the step of returning the packer to the retracted position after the buildup pressure is measured. 
     
     
         4 . The method of  claim 3 , further comprising the steps of:
 re-positioning the pressure buildup test system to a second evaluation zone;   moving the packer to the set position;   monitoring the pressure data of the hydrocarbon fluids flowing through the shut-in valve to determine the stable state of the pressure data in the second evaluation zone;   closing the shut-in valve when the stable state of the pressure data is reached to prevent the flow of the hydrocarbon fluids from the second evaluation zone; and   measuring the buildup pressure in the second evaluation zone using the pressure monitoring device.   
     
     
         5 . The method of  claim 1 , further comprising the step of filling the well with a completion fluid. 
     
     
         6 . The method of  claim 1 , wherein the completion fluid is brine. 
     
     
         7 . The method of  claim 1 , wherein the coiled tubing comprises a valve, the valve configured to shut-off the flow of the lift fluid. 
     
     
         8 . The method of  claim 1 , further comprising the steps of:
 drilling the well for production of hydrocarbon fluids; and   preparing the well by installing the casing in the well.   
     
     
         9 . An apparatus for pressure buildup testing in an evaluation zone of a well, the apparatus comprising:
 a packer, the packer is configured to isolate the evaluation zone when in a set position and is configured to create an annulus between a wall of the well and the apparatus in a retracted position;   a sub port, the sub port configured to deliver a lift fluid to the evaluation zone;   a coiled tubing, the coiled tubing configured to deliver the lift fluid from a surface to the sub port, wherein the apparatus is deployed by the coiled tubing, wherein the coiled tubing comprises a cable, the cable is configured to transmit electronic signals to a surface control system from the apparatus;   a shut-in valve, the shut-in valve configured to control the flow of hydrocarbon fluids from the evaluation zone to a well space at a distance above the packer;   a pressure monitoring device, the pressure monitoring device configured to measure pressure data in the evaluation zone and transmit the pressure data to the surface control system through the cable; and   a PLT, the PLT configured to measure flow from the evaluation zone through the shut-in valve to the well space above the packer.   
     
     
         10 . The apparatus of  claim 9 , wherein the lift fluid is nitrogen. 
     
     
         11 . The apparatus of  claim 9 , wherein the coiled tubing comprises a valve, the valve configured to shut-off the flow of the lift fluid. 
     
     
         12 . The apparatus of  claim 9 , wherein the surface control system is configured to send and receive electronic signals to the shut-in valve. 
     
     
         13 . The apparatus of  claim 9 , wherein the surface control system is configured to send and receive electronic signals to the pressure monitoring device. 
     
     
         14 . The apparatus of  claim 9 , wherein the surface control system is configured to send and receive electronic signals to the PLT. 
     
     
         15 . The apparatus of  claim 9 , wherein the surface control system is configured to display the electronic signals transmitted by the cable and is further configured to store the electronic signals transmitted by the cable.