Systems and methods for control of wellbore conveyance

Abstract

A method of operating a conveyance system implemented in a wellbore includes receiving surface measurements including surface load measurements, surface speed measurements, and depth of tool measurements for the conveyance system. The method includes, with a failure model, generating a threshold associated with at least one of a maximum run-in-hole speed, a maximum pull-out-of-hole speed, a maximum load, a minimum load, or a maximum depth of tool for the conveyance system. The method further includes adjusting the movement of the conveyance system based on identifying that the surface measurements surpass the threshold.

What is claimed is: 
     
         1 . A method of operating a conveyance system implemented in a wellbore, the method comprising: 
 receiving surface measurements including one or more of surface load measurements, surface speed measurements, or depth of tool measurements for the conveyance system;   with a failure model, generating a threshold including at least one of a maximum run-in-hole speed, a maximum pull-out-of-hole speed, a maximum load, a minimum load, or a maximum depth of tool for the conveyance system; and   adjusting movement of the conveyance system based on identifying that the surface measurements surpass the threshold.   
     
     
         2 . The method of  claim 1 , wherein the failure model generates the threshold based on a trajectory of the wellbore, subsurface formation properties, and the depth of tool measurements. 
     
     
         3 . The method of  claim 1 , wherein generating the threshold includes updating the threshold based on changes to the depth of tool measurements or based on changes to one or more inferred parameters utilized to determine the threshold. 
     
     
         4 . The method of  claim 1 , wherein the threshold includes a threshold probability distribution and the surface measurements includes a measurement probability distribution, and wherein identifying that the surface measurements surpass the threshold includes determining that an overlap coefficient between the threshold probability distribution and the measurement probability distribution is greater than an overlap threshold. 
     
     
         5 . The method of  claim 1 , wherein the conveyance system includes a wireline for conveying a wireline tool in the wellbore, and the threshold is generated with respect to conveying the wireline and the wireline tool in the wellbore. 
     
     
         6 . The method of  claim 1 , wherein the conveyance system includes a coiled tubing for conveying a downhole tool in the wellbore, and the thresholds are generated with respect to conveying the coiled tubing and the downhole tool in the wellbore. 
     
     
         7 . The method of  claim 1 , wherein adjusting the movement of the conveyance system includes adjusting a surface speed of the conveyance system such that the surface measurements are within the threshold. 
     
     
         8 . The method of  claim 1 , wherein adjusting the movement of the conveyance system includes adjusting a push/pull load of a downhole conveyance device of the conveyance system such that the surface measurements are within the threshold. 
     
     
         9 . The method of  claim 8 , wherein the downhole conveyance device is a downhole tractor for pushing or pulling a downhole portion of the conveyance system. 
     
     
         10 . The method of  claim 8 , wherein the downhole conveyance device is a fluid pressure for pushing a downhole portion of the conveyance system. 
     
     
         11 . The method of  claim 1 , wherein adjusting the movement of the conveyance system includes stopping the conveyance system based on identifying that the surface measurements cannot be maintained within the threshold. 
     
     
         12 . The method of  claim 1 , wherein receiving the surface measurements, generating the threshold, and adjusting the movement of the conveyance system are performed in real time. 
     
     
         13 . The method of  claim 1 , wherein adjusting the movement of the conveyance system is performed automatically and without user input. 
     
     
         14 . A method of operating a conveyance system implemented in a wellbore, the method comprising: 
 receiving depth of tool measurements;   identifying an operational status of the conveyance system;   based on the depth of tool measurements and the operational status, generating, with a failure model, a surface load threshold associated with a load on the conveyance system;   receiving surface load measurements for the conveyance system; and   adjusting a speed of the conveyance system to maintain the surface load measurements within the surface load threshold.   
     
     
         15 . The method of  claim 14 , wherein the operational status is tripping the conveyance system into the wellbore, and the load threshold is a minimum tension for the conveyance system. 
     
     
         16 . The method of  claim 14 , wherein the operational status is tripping the conveyance system into the wellbore, and the load threshold is a maximum compression for the conveyance system. 
     
     
         17 . The method of  claim 14 , wherein the operational status is tripping the conveyance system out of the wellbore, and the load threshold is a maximum tension for the conveyance system. 
     
     
         18 . The method of  claim 14 , wherein the operational status is tripping the conveyance system into the wellbore, and the load threshold is a maximum depth for the conveyance system. 
     
     
         19 . The method of  claim 14 , further comprising identifying a response delay for adjusting the speed of the conveyance system, and determining a change in load on the conveyance system during the response delay, wherein generating the threshold includes generating a response offset for the threshold, and wherein adjusting the speed includes adjusting the speed based on the response offset to maintain the surface load measurements within the threshold. 
     
     
         20 . A system, comprising: 
 a derrick;   a conveyance line partially positioned within a wellbore and being conveyed from a drum;   an injector head for conveying the conveyance line into and out of the wellbore;   a plurality of surface sensors;   at least one processor;   memory in electronic communication with the at least one processor; and   instructions stored in the memory, the instructions being executable by the at least one processor to: 
 receive surface measurements from the plurality of surface sensors, including one or more of surface load measurements, surface speed measurements, or depth of tool measurements for the conveyance system; 
 with a failure model, generate a threshold including at least one of a maximum run-in-hole speed, a maximum pull-out-of-hole speed, a maximum load, a minimum load, or a maximum depth of tool for the conveyance system; and 
 adjust, automatically and without user input, a speed of the conveyance line based on identifying that the surface measurements surpass the threshold.