【摘要】 为解决海洋水合物原位分离除砂器性能测试难度大且成本高等问题，利用相似理论构建基于替代样的常温常压分离测试试验台架，采用石蜡替代水合物开展了不同流量、不同含砂体积分数和不同水合物体积分数下的分离除砂试验，分析了水合物回收效率、砂去除效率和压降随参数变化的规律，并将试验结果与数值模拟结果对比。研究结果显示：随着流量的增加，水合物回收效率、砂去除效率和压降均增大；随着入口含砂体积分数增大，砂去除效率降低，水合物回收效率和压降增大；随着入口水合物体积分数增大，砂去除效率升高，水合物回收效率和压降降低，且变化均较小；水合物回收效率和砂去除效率最大值在90%以上，压降值在0.4 MPa以内，分离效率和压降模拟值与试验值变化趋势一致。研究结果可为原位分离除砂器性能测试提供一种新方法，同时表明该分离除砂器对水合物储层参数变化具有较好的适应性，在海洋天然气水合物开采中具有广阔的应用前景。更多还原

【Abstract】 To solve the problems of difficulty and high cost in testing the performance of in-situ separation desander for marine hydrates, first, the similarity theory was used to construct a test bench for normal temperature and pressure separation based on substitute samples. Second, the paraffin was used as a substitute for gas hydrate to conduct separation and desanding tests at different flow rates, sand volume fractions and hydrate volume fractions. Finally, the variations of hydrate recovery efficiency, sand removal efficiency and pressure drop with parameters were analyzed, and the test results were compared with numerical simulation results. The study results show that as the flow rate increases, the hydrate recovery efficiency, sand removal efficiency and pressure drop all increase. As the inlet sand volume fraction increases, the sand removal efficiency decreases, while the hydrate recovery efficiency and pressure drop increase. As the inlet hydrate volume fraction increases, the sand removal efficiency increases, while the hydrate recovery efficiency and pressure drop decrease, with all changes being relatively small. The maximum values of hydrate recovery efficiency and sand removal efficiency exceed 90%, the pressure drop is within 0. 4 MPa, and the change trends of separation efficiency and pressure drop between simulated values and experimental values are consistent. The study results provide a new method for in-situ separation desander performance test, and simultaneously show that the separation desander has good adaptability to the change of hydrate reservoir parameters, and demonstrates broad application prospects in marine gas hydrate exploitation.更多还原