港西四区聚合物驱工业性试验区效果评价

Evaluation on the effectiveness of polymer flooding in the industrial experimen-tal area of the 4th block of Gangxi.

本文简要介绍了港西四区聚合物驱工业试验区地质概况和聚合物注入过程，对聚合物驱油效果进行了评价。矿场试验效果说明聚合物驱已明显见到了增油降水效果，预计聚合物驱最终可增产原油７１６８６ｔ，吨聚合物增油量可达２３８ｔ，提高来收率７．４０％。聚合物驱的见效情况说明港西四区适合高浓度、小段塞、低用量的聚合物注入方式；防窜措施可以改善聚合物驱效果。

his paper briefly presents the geologic settings of the industrial experimental area of the thblock of Gangxi,procedure of polymer injection and effectiveness evaluation of polymerflooding. The field test results have shown that obvious effects of increasing oil productionrate and reducing water cut have been reached.The ultimate oil increment by polymer flood-ing is expected to be 71686 t,oil incrernent per ton polymer 238 t,and an increase of oil recov-ery 7.4%. The results indicate that high concentration polymer flooding,small slug andsmall volume are suitable to the 4th block of Gangxi ’and that anti-channeling measures canimprove the effects of polymer flooding.