透明摇晃-流动反应釜内水合物防聚剂性能测评研究

Hydrate Anti-agglomerant Evaluation Using a Transparent Rock-flow Cell

水合物容易在深水油气输送管道内形成并对管道流动安全构成极大威胁。向管道内加注水合物防聚剂,以此抑制水合物颗粒间的聚集并进而形成流动性良好的水合物浆,是防治水合物问题的常用措施。为了对道达尔公司(法国)提供的名为AA-D的水合物防聚剂(anti-agglomerant, AA)进行性能测评,使用透明摇晃-流动反应釜在不同晃动工况及AA-D浓度下开展了一系列水合物的生成及流动实验。实验中,使用网络摄像头分别记录水合物生成前、生成中及生成后的实验现象。同时,根据温度和压力曲线的变化计算出不同工况下水的转化率。根据实验结果,系统分析了防聚剂AA-D及晃动工况(摇晃角度和摇晃速率)对实验现象和水转化率的影响。结果表明:防聚剂AA-D在本实验条件下具有良好的水合物防治效果。研究成果可为水合物的防聚剂防治提供理论基础和借鉴。

Gas hydrates can readily form in deep-water oil and gas transportation pipelines and pose a great threat to pipeline flow assurance.One strategy for hydrate risk management is the injection of anti-agglomerants(AAs)into the pipeline,which could prevent the agglomeration of hydrate particles and favor the formation of flowable hydrate slurries.In order to investigate the effectiveness of an anti-agglomerants(AA)sample labeled AA-D provided by Total Fluides(France),a transparent rock-flow cell was used where a series of hydrate formation and flow experiments were conducted under different rocking conditions with and without the injection of AA-D.During the experiments,the experimental phenomena before,upon and after hydrate formation onset were recorded by a webcam.Water conversion of each case was also calculated based on the changes in temperature and pressure profiles.According to the experimental results,the effects of AA-D and rocking conditions(rocking angle and rocking rate)on the experimental phenomena and water conversion were systematically investigated.The results show that the effectiveness of AA-D is tested to be rather good under the experimental conditions.The research results can provide theoretical basis and reference for for the prevention and control of hydrate anti-agglomerant.