Fracture impact characterization

Abstract

Infill-to-parent well frac hits or fracture driven interactions occur when infill well fractures intersect with parent well depleted fractures or parent wellbores themselves. As a result, both the parent and infill well production can be negatively impacted. Understanding and mitigating frac hits is crucial for unconventional assets since they can impact many aspects of field development. Frac hits can cause parent well production loss, making it an important consideration when it comes to well spacing-stacking, completion design, and drilling schedules optimization decisions. In cases where parent wells have been knocked offline by frac hits, well interventions are often necessary to restore production. Refracturing of parent wells has been proven to protect them from offset infill frac hits, and also presents a secondary field development opportunity.

1 . A method to develop an unconventional reservoir comprising:
 build a database of unconventional reservoir properties that includes well properties and fracturing impacts;   empirical assessment of the well data;   multivariate analysis of the fracturing impacts;   predict fracturing impacts based on current fracturing properties; and   mitigate fracturing impacts by adjusting well and fracturing parameters.   
     
     
         2 . The method of  claim 1 , comprising unconventional reservoir properties selected from incorporates frac hit timing, pressure responses, water/sand volume changes, short- to long-term production impacts, associated parent/child well completion and geological information. 
     
     
         3 . The method of  claim 1 , wherein existing parent wells near a new completion pad are closely monitored, and their pressure, water, and short- and long-term production impacts are recorded. 
     
     
         4 . The method of  claim 1 , wherein existing parent wells are evaluated within a distance selected from 5000, 4500, 4000, 3500, 3000, 2500, 2000, 1500, 1000, and less than 1000 feet. 
     
     
         5 . The method of  claim 1 , wherein fracturing impact events are integrated with other relevant information such as geology, completion, and well schedule. 
     
     
         6 . The method of  claim 1 , wherein empirical analysis is conducted to identify key trends and drivers of fracturing impacts. 
     
     
         7 . The method of  claim 1 , wherein a multivariate analysis is used to model parameters for prediction of fracturing impacts. 
     
     
         8 . A process for mitigating fracturing impacts comprising:
 build a database of unconventional reservoir properties that includes well properties and fracturing impacts;   empirical assessment of the well data;   multivariate analysis of the fracturing impacts;   predict fracturing impacts based on current fracturing properties; and   mitigate fracturing impacts by adjusting well and fracturing parameters.   
     
     
         9 . The process of  claim 8 , comprising unconventional reservoir properties selected from incorporates frac hit timing, pressure responses, water/sand volume changes, short- to long-term production impacts, associated parent/child well completion and geological information. 
     
     
         10 . The process of  claim 8 , wherein existing parent wells near a new completion pad are closely monitored, and their pressure, water, and short- and long-term production impacts are recorded. 
     
     
         11 . The process of  claim 8 , wherein existing parent wells are evaluated within a distance selected from 5000, 4500, 4000, 3500, 3000, 2500, 2000, 1500, 1000, and less than 1000 feet. 
     
     
         12 . The process of  claim 8 , wherein fracturing impact events are integrated with other relevant information such as geology, completion, and well schedule. 
     
     
         13 . The process of  claim 8 , wherein empirical analysis is conducted to identify key trends and drivers of fracturing impacts. 
     
     
         14 . The process of  claim 8 , wherein a multivariate analysis is used to model parameters for prediction of fracturing impacts. 
     
     
         15 . A computer processor configured to calculate fracturing impacts comprising:
 a database of unconventional reservoir properties that includes well properties and fracturing impacts;   an empirical assessment of the well data;   a multivariate analysis of the fracturing impacts;   configured to predict fracturing impacts based on current fracturing properties; and   mitigating fracturing impacts by adjusting well and fracturing parameters.   
     
     
         16 . The computer processor of  claim 15 , comprising unconventional reservoir properties selected from incorporates frac hit timing, pressure responses, water/sand volume changes, short- to long-term production impacts, associated parent/child well completion and geological information. 
     
     
         17 . The computer processor of  claim 15 , wherein existing parent wells near a new completion pad are closely monitored, and their pressure, water, and short- and long-term production impacts are recorded. 
     
     
         18 . The computer processor of  claim 15 , wherein existing parent wells are evaluated within a distance selected from 5000, 4500, 4000, 3500, 3000, 2500, 2000, 1500, 1000, and less than 1000 feet. 
     
     
         19 . The computer processor of  claim 15 , wherein fracturing impact events are integrated with other relevant information such as geology, completion, and well schedule. 
     
     
         20 . The computer processor of  claim 15 , wherein empirical analysis is conducted to identify key trends and drivers of fracturing impacts. 
     
     
         21 . The computer processor of  claim 15 , wherein a multivariate analysis is used to model parameter for prediction of fracturing impacts.