稠油复合吞吐配套管柱研制与应用

稠油油藏进入开发中后期,动用不均、低压低产、汽窜等矛盾日益突出,严重影响稠油开发效果.二氧化碳、氮气助排等复合吞吐技术在现场应用中存在措施针对性差、施工周期长、生产时率低等问题.为此,研制了投球器、双作用封隔器、可逆注入阀球等核心工具,将分层注汽机械管柱与复合吞吐技术有机结合,形成了稠油复合吞吐配套管柱技术,一次投放管...

Development and Application of Supporting String for Composite Huff and Puff Technology of Heavy Oil Reservoirs

In the middle and later development stages of heavy oil reservoirs, there are more challenges such as uneven productivity, low pressure and low production, steam channeling, which have seriously affected the development efficiency of heavy oil reservoirs. In the field application of composite huff-puff technologies such as carbon dioxide and nitrogen assisted drainage, there are problems such as poor pertinence of measures, long construction period, and low production rate. In this regard, core tools such as ball injector, double-acting packer and reversible injection valve ball were developed, and the layered steam injection mechanical string was flexibly combined with the composite huff and puff technology to develop the supporting string technology for composite huff and puff in heavy oil reservoirs, realizing the purpose of quantitative injection of different media on demand. The field application indicated that this technology solved the problem of low application efficiency of conventional composite huff and puff technology and effectively improved the composite huff-puff effect and production rate of oil wells. This technology supports the scale application of the composite huff and puff technology in the later development stage of heavy oil reservoirs, with promising application and high potential.