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利用水平井开采超稠油,由于层多压高、压力没有突进、受油层走向和地层压力影响、油层吸汽不均或者放喷放不净等因素影响,导致水平井出现溢流。同时,水平井受溢流影响错过最佳作业时机,导致转抽后生产效果差、生产时间短、产量递减迅速。水平井不动管柱是采用井下耐高温无接箍抽油泵和双管柱悬挂井口,通过注汽管柱对水平井实施注汽,注汽结束后焖井。由于转抽时不需要上作业提出注汽管柱和下入采油管柱,焖井结束后可以直接启抽生产。由于各个环节均不动用管柱,所以即使出现溢流情况,也不会对日常生产造成影响。掺汽时,由于通过注汽管柱直接对油层进行加热,避免了通过套管掺汽致使套管产生套变。
The use of horizontal wells to extra-heavy oil production, due to the multi-layer pressure, the pressure does not protrude, affected by the formation and the formation pressure, uneven suction or release of the net discharge and other factors, resulting in horizontal well overflow. At the same time, the horizontal well is affected by the overflow and missed the optimal operation timing, resulting in poor production efficiency after turn-over, short production time and rapid decline of output. Horizontal wells do not move the column is the use of underground high-temperature non-ferrule sucker-pump and dual-column suspension wellhead, through the injection of steam injection of horizontal wells for steam injection, steaming after the completion of brazing wells. As pumping does not require work on the proposed steam injection pipe string and into the production tubing string, brazing wells after the end can be directly Kai pumping production. Since all links are not used column, so even if there is overflow, it will not affect the daily production. When the steam is mixed, the sleeve is prevented from sheathed due to the steam doping through the sleeve by heating the oil layer directly through the steam injection pipe string.