Validation of Estimating Stress from Fracture Injection Tests Using Continuous Wavelet Transform with Experimental Data

Mohamed Adel Gabry (), Ibrahim Eltaleb, Mohamed Y. Soliman and S. M. Farouq-Ali
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Mohamed Adel Gabry: Department of Petroleum Engineering, The University of Houston, Houston, TX 77023, USA
Ibrahim Eltaleb: Department of Petroleum Engineering, The University of Houston, Houston, TX 77023, USA
Mohamed Y. Soliman: Department of Petroleum Engineering, The University of Houston, Houston, TX 77023, USA
S. M. Farouq-Ali: Department of Petroleum Engineering, The University of Houston, Houston, TX 77023, USA

Energies, 2023, vol. 16, issue 6, 1-21

Abstract: The article discusses the new technique for fracture closure pressure detection using continuous wavelet transform (CWT). The study focuses on calibrating the CWT technique and comparing it with different techniques for closure detection. According to the article, traditional methods for identifying the closure of hydraulic fracturing operations are based on assumptions that can conflict with one another, resulting in greatly varying approximations of closure pressure and duration. To address this issue, the article employs a set of diagnostic fracture injection tests that utilize the Step-Rate Injection Method for Fracture In-Situ Properties tool (SIMFIP). By directly observing wellbore deformation, the SIMFIP tool determines the minimum principal stress, while strain gauges monitor the opening and closing of fractures during multiple tests. The publicly accessible data are used to evaluate the accuracy of the new closure detection technique using CWT. The findings indicate that the CWT method aligns with measurements of deformation and can identify the impact of intricate closure events and pre-existing natural fractures. In conclusion, the article suggests that the CWT technique shows great potential as an alternative to traditional approaches for detecting closure pressure.

Keywords: strain measurements; fracture closure; geothermal reservoirs; hydraulic fracture; DFIT (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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