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Validation of Carbonate Matrix Stimulation Models

机译:碳酸盐基质激发模型的验证

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The successful matrix stimulation of carbonate reservoirs requires that live acid penetrate past the formation damage. Effective acid penetration is facilitated either by transport through natural fractures or the formation of dissolution channels (wormholes) during the acidizing process. The optimal formation of wormholes and/or transport of live acid along natural fractures depends on the rate of reaction between the acid and the formation minerals, the rate of acid transport to the mineral surface, and the rate of acid convection along the wormhole and/or fracture. There are three prevailing theories in the literature that estimate the efficacy of acid stimulation treatmentsin carbonate formations. These theories predict the conditions at which wormhole formation occurs most efficiently and are based on the existence of: 1) an optimum injection rate at a transition between reaction-rate limited and fluid-loss limited regimes, 2) an optimum Peclet number, and 3) an optimum Damkoehler number.
机译:碳酸盐岩储层的成功基质增产要求活酸渗透穿过地层损害。通过酸化过程中天然裂缝的运输或溶解通道(虫洞)的形成促进了有效的酸渗透。虫洞的最佳形成和/或沿自然裂缝的活酸运输取决于酸与地层矿物之间的反应速率,酸向矿物表面的运输速率以及沿虫洞和/的酸对流速率或骨折。文献中有三种流行的理论估计了酸刺激处理在碳酸盐岩地层中的功效。这些理论预测了虫孔形成最有效的条件,并且基于以下条件的存在:1)在反应速率受限和流体损失受限机制之间过渡时的最佳注入速率; 2)最佳Peclet数;以及3 )的最佳Damkoehler数。

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