Affiliation:
1. SINOPEC Northwest Oilfield Branch, Urumqi, China
2. China University of Petroleum-Beijing, Beijing, China
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%.
Publisher
National Library of Serbia
Reference9 articles.
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