Method to determine a location for placing a well within a target reservoir

Abstract

A method of drilling a wellbore. The method may include collecting data for a plurality of well stages in at least one data reservoir. The method may also include creating a priority group of well stages from the plurality of well stages in the at least one data reservoir. The method may also include validating the well stages included within the priority group to create a validated priority group. The method may also include analyzing the data for the validated priority group to determine an effective conductivity value for each well stage in the validated priority group. The method may also include using the effective conductivity value to determine a target location for drilling the wellbore in the target reservoir. The method may also include drilling a well at the target location in the target reservoir.

What is claimed is: 
     
         1 . A method of drilling a wellbore comprising:
 collecting data for a plurality of well stages in at least one data reservoir;   creating a priority group of well stages from the plurality of well stages in the at least one data reservoir;   validating the well stages included within the priority group to create a validated priority group;   analyzing the data for the validated priority group to determine an effective conductivity value for each well stage in the validated priority group;   using the effective conductivity value to determine a target location for drilling the wellbore in the target reservoir; and   drilling a well at the target location in the target reservoir.   
     
     
         2 . The method of  claim 1 , wherein validating the well stages included within the priority group comprises:
 identifying each well stage in the plurality of well stages which has experienced a screen out or has experienced mechanical problems; or   identifying a stimulation design for each well stage in the plurality of well stages.   
     
     
         3 . The method of  claim 1 , wherein analyzing the data for the validated priority group includes analyzing at least one of:
 a breakdown pressure;   a clean fluid volume (fluid without proppant);   a conductivity;   a density;   a downhole pressure;   a downhole rate of fluid;   an effective conductivity;   a fracture breakdown pressure;   a fracture closure pressure;   a fracturing fluid volume;   an initial shut in pressure;   pounds of proppant pumped;   a proppant concentration;   a pump pressure;   a pump rate;   a reservoir fluid composition;   reservoir fluid properties;   a reservoir pressure;   a specific gravity;   a temperature of fluid; and   a time.   
     
     
         4 . The method of  claim 1 , further comprising
 collecting production data for each well stage of the plurality of well stages in the at least one data reservoir;   comparing the production data to the effective conductivity value for each well stage of the plurality of well stages in the at least one data reservoir; and   verifying that the effective conductivity value correlates with the production data.   
     
     
         5 . The method of  claim 1 , wherein validating the well stages included within the priority group comprises: identifying, evaluating, and selectively eliminating outliers. 
     
     
         6 . The method of  claim 5 , wherein validating the well stages included within the priority group comprises: eliminating well stages that experienced a screen out, well stages that experienced mechanical problems, or the well stages with dissimilar stimulation designs. 
     
     
         7 . The method of  claim 1 , wherein the validated priority group of the well stages comprises well stages with similar data. 
     
     
         8 . The method of  claim 1 , wherein analyzing the data for the validated priority group comprises:
 calculating a pressure leak-off rate for each well stage in the validated priority group; and   determining the effective conductivity value for each well stage in the validated priority group based upon the pressure leak-off rate of each well stage in the priority group.   
     
     
         9 . The method of  claim 1 , wherein analyzing the data for the validated priority group comprises applying a dimensionless scaling factor to the data to form dimensionless data. 
     
     
         10 . The method of  claim 9 , wherein analyzing the data for the validated priority group comprises determining an effective dimensionless conductivity value for each well stage in the validated priority group based upon the dimensionless data. 
     
     
         11 . The method of  claim 10 , wherein analyzing the data comparing the effective dimensionless conductivity value to the effective conductivity value. 
     
     
         12 . A method of locating a wellbore comprising:
 collecting data for a plurality of well stages in at least one data reservoir;   creating a priority group of well stages from the plurality of well stages in the at least one data reservoir;   validating the well stages included within the priority group to create a validated priority group;   analyzing the data for the validated priority group to determine an effective conductivity value for each well stage in the validated priority group; and   using the effective conductivity value to determine a target location for drilling the wellbore in the target reservoir.   
     
     
         13 . The method of  claim 12 , wherein analyzing the data for the validated priority group comprises determining the effective conductivity value for each well stage in the priority group based upon the data of each well stage in the priority group. 
     
     
         14 . The method of  claim 12 , wherein analyzing the data for the validated priority group comprises applying a dimensionless scaling factor to the data to form dimensionless data. 
     
     
         15 . The method of  claim 14 , wherein analyzing the data for the validated priority group comprises determining an effective dimensionless conductivity value for each well stage in the validated priority group based upon the dimensionless data. 
     
     
         16 . The method of  claim 15 , wherein analyzing the data for the validated priority group comprises comparing the effective dimensionless conductivity value to the effective conductivity value. 
     
     
         17 . A method of locating a wellbore in a target reservoir comprising:
 establishing a model of a data reservoir in a validated priority group by:
 collecting data for a plurality of well stages in the data reservoir; 
 creating a priority group of well stages from the plurality of well stages in the data reservoir; 
 validating the well stages included within the priority group to create the validated priority group; 
 analyzing the data for the validated priority group to determine the effective conductivity value for each well stage in the validated priority group; 
 developing the model of the data reservoir using the effective conductivity value for each well stage in the validated priority group; 
   predicting an effective conductivity value in the target reservoir using the model of the data reservoir to; and   locating the wellbore in the target reservoir using the predicted effective conductivity in the target reservoir.   
     
     
         18 . The method of  claim 17 , wherein analyzing the data for the validated priority group comprises applying a dimensionless scaling factor to the data to form dimensionless data. 
     
     
         19 . The method of  claim 18 , wherein analyzing the data for the validated priority group comprises determining an effective dimensionless conductivity value for each well stage in the validated priority group based upon the dimensionless data. 
     
     
         20 . The method of  claim 17 , wherein predicting the effective conductivity value in the target reservoir comprises correlating at least one attribute associated with the target reservoir with the to the predicted effective conductivity value.