轮南油田复合柱塞气举新工艺

随着轮南油田地层能量不断衰竭，大部分油井已经进入低压、低产阶段，常规柱塞气举井产量低、携液效率低，且该工艺间歇性开关井制度制定不合理时易导致井筒积液压死油层，造成经济损失。为了解决上述问题，通过室内研究与现场试验，采用多项工艺相结合的方式研发出一套“固定式多级气举阀管柱+浮动式中空快速柱塞+清蜡柱塞”相结合的复合柱塞气举新工艺。该工艺在前期柱塞气举技术的基础上进行了创新，实现了不关井连续生产，避免井筒积液，现场应用4井次共减少清蜡作业次数147次、减少制氮车气举作业LNA井2次、LNB井1次，并且复合柱塞运行增油1 096 t。复合柱塞气举新工艺现场应用效果明显，已逐步在油田进行推广，实现柱塞气举井高效生产。

A new combined plunger lift technology used in Lunnan Oil field

As the producing energy depletes continuously in Lunnan Oilfeld, most oil wells are now at the stage of low pressure and low yield, and conventional plunger lift wells are low in production rate and liquid carrying effciency. Besides, when the intermittent well startup and shutdown system is not formulated rationally, liquid loading occurs easily to make the oil layers dead, resulting in economic loss. To solve these problems, a new combined plunger lift technology of " fxed multistage gas lift valve string + foating hollow quick plunger + paraffn removal plunger " was developed by combining multiple technologies based on laboratory study and feld experiment. This technology is innovatively developed on the basis of earlier plunger lift technology. By virtue of this technology, continuous production without shutting the well is realized and liquid loading is avoided. It is applied practically in four wells times, and paraffn removing operation is reduced by 147 times, gas lift of nitrogen generation vehicle by twice and incremental oil of 1 096 t by combined plunger operation. This combined plunger lift technology is remarkable in feld application, and it is being popularized in the oilfeld gradually to realize the effcient production of plunger lift wells.