聚合物凝胶封堵剂性能评价及现场试验

高含水油田由于长期注水开发造成注入水无效循环问题非常突出,形成了高渗透条带,采用化学堵剂对高渗透条带进行封堵是一种有效的方法。堵剂的性能直接影响封堵效果,为进一步提高封堵成功率和驱替效率,对聚合物凝胶封堵剂进行了室内性能评价和现场试验。通过岩心试验和三管试验对聚合物凝胶封堵剂体系的封堵性能、耐冲刷性能、流动成胶性能和液流改向能力进行了室内评价试验;采用聚合物凝胶体系和油田污水配制成的聚合物凝胶封堵剂进行了现场试验。试验结果表明,聚合物凝胶体系具有较强的堵塞和耐冲刷性能,形成凝胶强度高,2口井实施封堵后连通油井见到了明显的增油降水效果,为聚合物凝胶体系在封堵高渗透带上的应用提供了成功经验。

Performance evaluation and field experiment of polymer gel block agent

In view of invalid of water injection in high water cut oilfield,and formed high permeability zone,block of it by chemical block agent is effective.The performance of block agent effect the effectiveness of blocking,so laboratory and field experiment of polymer gel block agent were done to enhance its blocking effectiveness.Sealing characteristics,resist erode performance,flow gelled performance,and flow orientation change capacity were tested in laboratory by core and tri-tube experiments.Also,field blocking testing was done by polymer gel block agent made up by polymer gel and sewage of oilfield.The experiment shows that polymer gel has preferably seal and resist erode capability,and has perfect intensity,two wells application have obtained evidently effectiveness,which provide successful experiences for polymer gel applications in high permeability zone.