Acid injection, reactive instabilities and wormholing in carbonate reservoirs is investigated through the analysis of the linear acidizing problem theoretically and experimentally. Theoretically acidizing was analyzed by formulating the problem as a reactive moving boundary Stefan type problem. Wormholing is viewed as a reactive infiltration instability to the trivial solution of uniform dissolution. A linear stability analysis from the equilibrium state is performed and the critical wavenumber below which instabilities have a positive growth rate is identified. When applied to the scale of the experiment, an optimum injection velocity is identified for a given formation and injection concentration, for the growth for a single wormhole. This optimum injection velocity scales with the inverse of the specimen diameter. Experimentally, linear acidizing tests were performed in Mons chalk, a high porosity analogue of North Sea reservoir chalk. In the experiments the critical injection velocity for wormhole formation at minimum acid injection was obtained and the results were compared with the theoretical predictions.

通过对线性酸化问题的理论和实验分析，研究了碳酸盐岩储层中的注酸，反应性不稳定和虫洞现象。通过将问题公式化为反应性运动边界Stefan型问题来分析理论上的酸化。蠕孔现象被视为对均匀溶解的琐碎溶液的反应性渗透不稳定性。从平衡状态进行线性稳定性分析，并确定临界波数，低于该临界波数，不稳定性具有正的增长率。当应用于实验规模时，对于给定的地层和注入浓度，对于单个虫洞的生长，可以确定最佳注入速度。最佳注射速度与样品直径成反比。实验上，线性酸化试验是在Mons粉笔（北海储层粉笔的高孔隙度类似物）中进行的。在实验中，获得了在最少的酸注入下产生虫洞的临界注入速度，并将结果与​​理论预测值进行了比较。