第1个回答 2009-04-14
Many models have provided the sandstone acidification design rationale. Two mineral models divide into simply according to the mineral reactivity the reactant two kinds: High-speed response mineral and slow response mineral. This model and under the moderate temperature condition the short core sample acid liquor flows out the density to tally. Based on this, two acid three mineral models had considered the speed of flow influence, has included two extra responses: H2SiF6 and the aluminosilicate responded that produces the silica gel to precipitate, (3) is investigating and studying thoroughly with the silica gel and HF response in each kind of acidification analog modeling foundation, established the unsteady state well chamber temperature field model, to consider that the sour crag response exothermic reservoir temperature field model, “two acid three minerals” the sandstone acidification mathematical model, as well as the sandstone acidification produced can the forecast model, and used the numerical simulation the method to carry on the solution computation, has consummated the sandstone acidification mathematical model system, enhanced the acidified design scientific nature and the reliability.
第2个回答 2009-04-14
Many sandstone acidizing model design provides a theoretical basis. According to the two mineral model of reactive mineral reactants simply to fall into two categories: fast and slow response of fossil minerals. The model with the middle-temperature Short cores coincide with the concentration of acid outflow. On this basis, the two mineral acid model takes into account the effects of flow rate, including two additional response: H2SiF6 aluminum silicate and silica precipitation reaction and the reaction of silica with HF
(3) acidification of in-depth study of various simulation models, based on the establishment of a shaft of non-steady-state temperature field model, consider the acid rock of the reservoir temperature of exothermic reaction field model, "the two mineral acid" mathematical model of acidification of sandstone, as well as sandstone acidizing capacity forecasting model, using numerical simulation methods to calculate the solution to improve the mathematical model of sandstone acidizing system, increased acidification of Scientific Design and reliability.
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