稠油火驱尾气集输管网水合物抑制剂筛选及应用

摘要

Under a certain temperature and pressure, the gas collection system will inevitably produce hydrates. During the production in winter in Shuguang oil production plant of Liaohe oilfield, due to low temperature, shallow buried depth of the pipelines, and big liquid carrying quantity of exhaust gas, hydrates and free water always formed in the pipelines, so the frozen blocking phenomenon frequently took place. There are many ways to prevent the formation of natural gas hydrates, and the method of injecting hydrate inhibitor in gas wells is relatively common. In view of the actual situation, in order to achieve the purpose of reducing the occurrence of the frozen blocking condition, the hydrate inhibitors were screened, the dosage was optimized, and the hydrate control scheme was worked out.%在一定温度和压力条件下，集气系统不可避免的会形成水合物。辽河油田曙光采油厂在冬季生产过程中，由于温度低、部分管线埋地浅、尾气携液量大等原因，在输送过程中易形成游离水及水合物，在冬季生产过程中经常发生冻堵现象。预防天然气水合物形成的方法有很多，其中在气井中注入水合物抑制剂的方法较为普遍。现针对此问题，以水合物减少的百分数为衡量标准，通过软件计算，对常用的水合物抑制剂进行筛选，对筛选出的冻堵防治抑制剂进行优化用量并制定冻堵防治方案，以达到减少冻堵情况发生的目的，此举对曙光采油厂实际运行具有一定的指导意义。