水合物模型的建立及在含盐体系中的应用

A NEW HYDRATE MODEL AND ITS EXTENDED APPLICATION IN ELECTROLYTE CONTA INING SYSTEM

基于一个新的水合物生成机理，提出了一个简化的水合物热力学模型；在此模型基础上，结合左有祥博士提出的可用于高压电解质水溶液的ＭＰＴ状态方程，将水合物生成条件预测扩展应用于含电解质体系。大量检验结果表明，新模型在预测气体水合物生成条件方面优于传统的ｖａｎｄｅｒＷａａｌｓＰｌａｔｔｅｅｕｗ（ｖｄＷＰ）模型及其改进型，可适用于预测天然气、凝析气和原油在纯水和盐水中生成水合物的条件。

A new initiation mechanism is proposed for gas hydrate formation from liquid wat er. Based on this mechanism, a new thermodynamic hydrate model has been develope d and extended to the electrolytecontaining system by incorporating with modif ied PatelTeja equation. A number of test results indicate that the new model i s superior to the traditional van der WaalsPlatteeuw typed ones and adequater for prediction of the hydrate formation conditions for natural gas, gas condensa te or crude oil. It has been also shown that the new model is applicable to the system containing brine inhibitor.