海上稠油油田复合调驱技术与应用

渤海D油田为中、高孔渗稠油油藏,经过长期注水开发,水窜大孔道发育,单一的调驱措施效果逐渐变差。针对平台作业空间狭小、储层调驱效果弱化的问题,进行"凝胶+聚合物微球"复合调驱技术研究,开展了复合调驱体系评价室内研究,筛选并优化体系配方,通过非均质岩心驱替实验表明复合技术比单项技术采收率增幅提高10.5%。矿场应用结果表明:"凝胶+聚合物微球"复合调驱技术有效抑制了注入水延高渗带的突进,井组含水上升趋势得到明显抑制,阶段累计增油超过6×10^3m^3并持续有效,为老油田深部挖潜、提高调驱效果提供了新思路,对海上注水开发油田稳油控水工艺具有示范意义。

Compound profile control and flooding technology and application in offshore heavy oilfields

Bohai D oilfield is a medium-high porosity and permeability heavy oil reservoir.After long-term waterflooding development, water channeling and large pore channels are developed, and the effect of single profile control and displacement measures is getting worse. In view of the problem of narrow operation space and weakening effect of reservoir flooding, we carried out the research on the compound flooding technology of gel& polymer microsphere, carried out the evaluation of compound flooding system, evaluated the indoor research, screened and optimized the formulation of the system, and through heterogeneous core displacement experiments showed that the composite technology increased by 10.5 %over the single technology recovery rate. The application results of the field show that,gel&polymer microsphere composite flooding technology can effectively inhibit the infiltration of water injection into the high permeability zone, and the upward trend of water cut in well group has been obviously suppressed. The cumulative increase of oil in the well group is more than 6×10^3 m^3 and is continuous and effective. It provides a new idea for the deep exploration of the old oilfields and the effect of high profile flooding. The technology of oil stabilization and water control in waterflooding oilfields is of demonstration significance.