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针对乐安稠油老区吞吐末期开发效果日益变差的状况 ,开展了井下自生气复合泡沫技术研究。根据室内研究 ,在高温下引发剂迅速分解产生的CO2 等气体 ,能扩大蒸汽扫油面积 ,降低原油粘度 ,提高注汽效果。当引发剂与泡沫剂混合注入时 ,则兼具气驱、活性液驱与泡沫驱的功效。该工艺现场施工简单 ,费用低 ,在草 2 0区块开展了 3口井的现场应用试验 ,收到了较好的增油效果
In view of the deteriorating effect of the end-stage development of heavy oil in the old area of Luan heavy oil, the research on underground self-forming composite foam technology was carried out. According to laboratory studies, the rapid decomposition of the initiator at high temperatures generates CO2 and other gases, which can increase the sweeping area of steam, reduce the viscosity of crude oil and enhance the steam injection effect. When the initiator and foam mixed into the injection, then both the gas drive, active liquid drive and foam drive efficiency. The process site construction is simple, low cost, in the grass 20 blocks carried out field trials of three wells, received a good effect of increasing oil