CO_2吞吐技术在深层稠油开发中的应用

Application of CO_2 huff and puff in deep heavy oil development

吐哈油田深层稠油和三塘湖盆地浅层稠油探明储量9814×104t,利用三次采油技术开发对吐哈油田储量接替和原油上产具有战略性意义。由于原油黏度高,在井底附近及其井筒内的流动性较差,在不采取额外措施的情况下无法进行正常、稳定生产。同时,边远难采区块的勘探试油,需要采取新的工艺才能获取试采数据,落实油藏储量,提高对油藏的进一步认识。通过调研认为:在稠油油藏开发过程中,利用CO2实施早期吞吐,具有很大的上产潜力和经济效益。

The proven heavy oil reserves are 98.14 million tons in both deep formation of Tuha Basin and shallow formation of Santanghu Basin. The crude oil development by using the tertiary recovery technology has a strategic significance for reserves replace and production task. The flowing property of crude oil is poor in the vicinity of bottom hole and well bore due to high viseocity. The wells can not produce normally and stably without additional measures. At the same time, the new production test technology is needed in the remote block exploration, which is useful to obtain the production test data, to confirm the oil reserves and to further enhance the knowledge of exploration area. The study results show that the early implementation with COz huff and puff technology has the great production potential and economic benefits during heavy oil development.