Author(s)

Heng Xue^1,2,3*, Zuxi Huang¹, Liqiang Zhao², Hehua Wang^1,3, Pingli Liu¹

¹China ZhenHua Oil Co., Ltd., Beijing, China.
²State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation Engineering (Southwest Petroleum University), Chengdu, China.
³Chengdu North Petroleum Exploration and Development Technology Co. Ltd., Chengdu, China.

This paper presented empirical models of describing reaction rate vs. hydrochloric acid temperature and concentration by regressing experimental data. And this paper also introduced the dependent reaction heat model into the thermal non-equilibrium models and coupled with two-scale continuum model to obtain governing equations for describing wormholing under non-isothermal conditions. The governing equations were discretized by implicit difference method and solved by programing. The effects of temperature on wormholing have been investigated based on the simulation results on 2-D vision. A significant difference of the effluent temperature between the dependent reaction heat model in present work and the constant reaction heat model in available literatures was observed, especially in high injection rate and strong acid concentration. In addition, the tendencies of optimum injection capacity vs. injection temperature under isothermal and non-isothermal conditions were almost different. Finally, an optimum injection temperature was found by changing the injection temperature under non-isothermal conditions.

Carbonate Reservoir, Matrix Acidizing, Temperature, Wormhole Propagation, Numerical Simulation

Xue, H. , Huang, Z. , Zhao, L. , Wang, H. and Liu, P. (2019) Wormholing Influenced by Injection Temperature in Carbonate Rocks. Open Journal of Yangtze Oil and Gas, 4, 12-30. doi: 10.4236/ojogas.2019.41002.