THERMAL SCIENCE

International Scientific Journal

Xiong Zhang

,

Xu-Sheng Cao

,

Yao-Yao Sun

,

Lian Liu

,

Bing Zhao

,

Yun-Di Geng

LABORATORY STUDY ON ACID FRACTURING PERFORMANCE IN HIGH TEMPERATURE CARBONATE RESERVOIRS

ABSTRACT
In this article, we investigate acid fracturing, a promising method to increase the effectiveness of fractures in high temperature carbonate reservoirs. In order to determine the performance of acid fracturing in carbonate reservoirs, we conducted a lab scaled true triaxial acid fracturing experiment on high temperature carbonate rock. The fracture initiation, propagation behavior, and conductivity under the action of acid solution were analyzed. The 3-D micro computed tomography was applied to illuminate the fracture network patterns; coefficient of stress difference, acid etching time, and acid concentration were also analyzed. Results show acidification exhibits the lowest breakdown pressure compared with no-acidification, reduced by 58%.
KEYWORDS
geothermal, High-temperature carbonate, acid fracturing, acidification, conductivity
PAPER SUBMITTED: 2023-07-14
PAPER REVISED: 2023-08-19
PAPER ACCEPTED: 2023-12-27
PUBLISHED ONLINE: 2024-02-18
DOI REFERENCE: https://doi.org/10.2298/TSCI230714033Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 2, PAGES [1113 - 1119]
REFERENCES
  1. Liu, H. T., et al., Technical Progress and Development Direction of Oil Testing and Reservoir Recon­struction in Ultr NO. A-Deep Reservoirs in Tarim Basin, Natural Gas Industry, 40 (2020), 3, pp. 76-88
  2. Alameedy, U., et al., Matrix Acidizing in Carbonate Rocks and the Impact on Geomechanically Proper­ties: A Review, Fuel, 349 (2023), 10, ID128586
  3. Tinker, S. J., et al., Equilibrium Acid Fracturing: A New Fracture Acidizing Technique for Carbonate Formations, SPE Production Engineering, 6 (1991), 1, pp. 25-32
  4. Anderson, M. S., et al., Dynamic Etching Tests Aid Fracture-Acidizing Treatment Design, SPE Produc­tion Engineering, 4 (1989), 4, pp. 443-449
  5. Zimmermann, G., et al., Rock Specific Hydraulic Fracturing and Matrix Acidizing to Enhance a Geother­mal System-Concepts and Field Results, Tectonophysics, 503 (2011), 12, pp. 146-154
  6. Portier, S., et al., Review on Chemical Stimulation Techniques in Oil Industry and Applications to Geo­thermal Systems, Engine, 5 (2007), 4, 32
  7. Barrios, L., et al., Acid Stimulation of Geothermal Reservoirs, Short Course on Geothermal Development and Geothermal Wells, Santa Tecla, El Salvador, 2012
  8. Song, S., et al., Application of Acidizing and Plugging Removal Technology in Chang 2 Reservoir of CH Oilfield, Earth and Environmental Science, 252 (2019), 4, pp. 42-101
  9. Lei, Z. H., et al., Study on the Characteristics of Hot Dry Rock Reservoir and Fracturing Test Model in the Gong He Basin, Qinghai Province, Changchun, Jilin University, Jilin, China, 2020
PDF VERSION [DOWNLOAD]
Laboratory study on acid fracturing performance in high temperature carbonate reservoirs

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence