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00443 Mathematical Modeling of Sandstone Stimulation: A Critical Review of Available Models

Product Number: 51300-00443-SG
ISBN: 00443 2000 CP
Author: T.M. AI-Shaalan and H.A. Nasr-EI-Din
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This paper reviews previous work done on mathematical modeling of the chemical reactions between sandstone and mud acid, which is a mixture of HF and HCl acids. These models are lumped-parameter model, two-parameter model, four-parameter model, and detailed chemistry models. The models are compared with the experimental data at different flow rates. The lumped-parameter model simplifies the chemistry of the dissolution of sandstone minerals with mud acid. The two-parameter model predicts lab experiments at high flow rates only. Predictions based on the four-parameter model agreed with the experimental data over a wide range of flow rates. Detailed chemistry models have no advantage in predicting experimental data over the four-parameter model. In addition, detailed chemistry models fail to predict coreflood experiments at low acid injection flow rates.
This paper reviews previous work done on mathematical modeling of the chemical reactions between sandstone and mud acid, which is a mixture of HF and HCl acids. These models are lumped-parameter model, two-parameter model, four-parameter model, and detailed chemistry models. The models are compared with the experimental data at different flow rates. The lumped-parameter model simplifies the chemistry of the dissolution of sandstone minerals with mud acid. The two-parameter model predicts lab experiments at high flow rates only. Predictions based on the four-parameter model agreed with the experimental data over a wide range of flow rates. Detailed chemistry models have no advantage in predicting experimental data over the four-parameter model. In addition, detailed chemistry models fail to predict coreflood experiments at low acid injection flow rates.
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