用物理化学辅助蒸汽吞吐技术改善超稠油开采效果

Im proving the Result of Superviscous Oil Recovery by Com bining Steam Soaking With Chem ical-physical Method

针对乐安油田超稠油区原油粘度大，注汽困难的开采特点，从超稠油渗流特征研究着手，采用物理化学辅助蒸汽吞吐技术提高该地区原油采收率，比较了采取不同强化注汽措施前后，采油情况的变化开展了以降粘剂、助排剂、声波助注器为主的物理化学辅助蒸汽吞吐的现场试验，见到了明显的增油效果，通过施使物理化学复合工艺，一般可提高油汽比０．１ ～０．５，并延长生产周期，增加采油量．

The viscosity ofthe crude oilin thesuperviscousoilarea ofLean OilField is very high, So itis difficultto putthe oilfield into com m ercialdevelopm entby sim ple steam soaking. In orderto solvethe difficul- ty, the oilrecovery technology ofcom bining steam soaking w ith auxiliary physical-chem icalm ethod isadopted. Viscosity reducing agent and cleanup additive are used in chem icalm ethod, and the dow nhole unit for aiding steam injection is used in physicalm ethod. Itisproven thatthe com pound oilrecovery technology can increase oil/gas ratio of0.1～0.5, can also prolong developm entperiod and increase oilproduction.