Description

UTFracT consists of a pseudo 3-D heat transfer model with a Windows interface. Since the temperature log is an inexpensive and reliable tool, it has been a popular means of evaluating hydraulic fracturing treatments. Fracture height is measured with a temperature log by locating the cool region created by injection of the fracturing fluid into the fracture. The mathematical model of the program includes the concept that the fracture may be separated from the wellbore, resulting in abnormal temperature behavior. There are three well/fracture configuration patterns in the program: a coincident pattern, a constant-angle of deviation, and a helical deviation.

Benefits

• The output of the program includes the wellbore temperature history after fracturing and a profile of the wellbore temperature as a function of depth.
  
• Actual logging data can be plotted in the program against the simulated temperature to confirm the assumption made about the well/fracture pattern.
  
• Abnormal temperature behavior caused by the displacement between the fracture and the wellbore can be explained, and the effect on the fracture height interpretation can be eliminated.
  

Features

• Simulates wellbore temperature versus time for a well that has been shut-in after a hydraulic fracturing treatment
  
• Generates a simulated temperature log that can be compared with actual logs
  
• Considers unusual wellbore/fracture geometries
  
• Has a user-friendly Windows interface
  

Market Potential/Applications

Energy production and exploration.

Contact:

University of Texas,
Austin, USA
Website : www.otc.utexas.edu