International Journal of
eISSN: 2475-5559
Submit manuscript...
Research Article Volume 7 Issue 1
Improved estimation of reservoir shape factor incorporating skin factor using the direct synthesis technique
Freddy Humberto Escobar, Juan Pablo Salazar, Daniel Suescún-Díaz
Received: July 05, 2024 | Published: August 14, 2024
Citation: Escobar FH, Salazar JP, Suescún-Díaz D. Improved estimation of reservoir shape factor incorporating skin factor using the direct synthesis technique. Int J Petrochem Sci Eng. 2024;7(1):36-42. DOI: 10.15406/ipcse.2024.07.00142
Abstract
The Direct Synthesis Technique (TDS), introduced by Tiab,1 is a well test interpretation methodology noted for its practicality and accuracy, utilizing distinctive features observed on log-log plots of pressure and its derivative to enhance reservoir characterization. The shape factor, CA, originally proposed by Dietz,2 is crucial for estimating average reservoir pressure. While several authors have explored its estimation using the TDS Technique, previous equations often yielded results in the range of 10-13, diverging from the expected 1-100 due to the omission of the skin factor. This study addresses this gap by incorporating the skin factor into new simplified equations. The new equations provide more accurate and reliable estimates of the shape factor compared to conventional analyses. The proposed expressions are validated through their application to vertical and horizontal wells in homogeneous reservoirs, naturally fractured reservoirs, and hydraulically fractured wells in homogeneous reservoirs. Results show a significant improvement, aligning closely with those obtained from conventional straight-line analysis methodologies. Two examples are given to show the results of the new equations. This advancement enhances the accuracy and reliability of reservoir characterization using the TDS Technique.
Keywords: shape factor, pressure derivative, pseudosteady-state, conventional analysis
©2024 Escobar, et al. This is an open access article distributed under the terms of the, which permits unrestricted use, distribution, and build upon your work non-commercially.