早期可动凝胶调驱注水开发普通稠油油藏

华北油田赵108断块为多层普通稠油油藏，注水开发后产油量递减严重、含水上升速度快、层间矛盾突出、水驱效率低。为了改善油藏开发效果，实施早期周期性可动凝胶调驱，经过4个轮次调驱与注水开发，实现了年产3万t、稳产10年的开发目标。早期可动凝胶多轮次调驱与单纯注水开发（数值模拟结果）开采10年的指标对比表明：油藏采出程度达到21％，提高10．01％；综合含水率为67．6％，降低了25．4％；中、高含水阶段的含水上升率分别为6．93％和2．08％，远低于单纯水驱开发预测的12．06％和6．15％，中低含水期成为原油主要开发阶段。断块采出程度提高，稳产期延长，注入水利用率提高，投资回收期缩短，取得了显著的经济效益。赵108断块开发效果表明，采取早期周期性可动凝胶调驱注水开发可以改善普通稠油油藏开发效果。图6表2参11

Early movable-gel-driving in water-flood development of heavy oil reservoirs

The Zhao 108 fault-block of Huabei Oilfield is a multi-layered ordinary heavy oil reservoir. During the water flood development, the oil production decreased seriously, the water cut increased quickly, the interlayer interference was obvious, and the water flood efficiency was low. In order to improve the effect of reservoir development, in the early stage of water flooding, the periodic movable-gel-driving, consisting of 4 rounds, was implemented, achieving an annual output of 30,000t for 10 years. In contrast to the simulated pure water flooding results, the 10-year development of early movablegel-driving results in an oil recovery of 21% with an increase of 10.01%, a water cut of 67.6% with a decrease of 25.4%, and a much lower increased rate of water cut. Production of Zhao 108 fault-block shows that the oil recovery is increased with a longer period of stabilized production, a higher water utilization rate, a shorter investment recovery period, and a much better economic benefit.