UTFracT Computer Software
Background Knowing the location and height of a fracture in a well bore can help the operator to plan and optimize production of the well and to improve future fracturing operations. Temperature logs have been used to determine the locations and the heights of fractures created by hydraulic fracturing treatments.Invention 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
Development Stage Commercial product
UT Researcher A. Daniel Hill, Ph.D., Petroleum and Geosystems Engineering, The University of Texas at Austin Ding Zhu, Ph.D., Petroleum and Geosystems Engineering, The University of Texas at Austin Eric Davis, ConocoPhillips Company
Type of Offer: Licensing
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