特高含水期井震结合注采系统挖潜调整研究

进入特高含水期后,开展注采系统调整挖潜剩余油是油田持续稳产的关键.为了提高特高含水阶段油田采收率,提出井震结合方法精细标定构造层位、认识储层特征,构建地质模型并数值模拟剩余油分布,针对剩余油应用井震结合解释成果设计注采系统调整方案并优化相应注水强度.实验区块研究结果表明:特高含水期,采用井震结合注采系统调整方法最终产油量和采收率分别提高31.21×10~4t和1.54%,能够达到有效挖潜剩余油的目的;而改变注水强度对最终开发效果影响显著,随着注水强度增加,采收率先增大后减小,存在最佳的注水强度为9m~3/d·m.

Research on Potential Tapping Technique of Injectionproduction System Adjustment Using Well and Seismic Combined Method at Ultra-high Water Cut Stage

After entering ultra-high water cut stage,the key to ensure continuous production of oilfield is conducting injection-production system adjustment to develop remaining oil.In order to improve the recovery ratio of ultra-high water cut staged oilfield,well and seismic combined method to fine label tectonic level,understand reservoir characteristics,construct geological model and simulate remaining oil distribution using numerical simulation been put forward.Using analyzed results of well and seismic combined method,injection-production system adjustment project has been designed and optimized relevant water intake per unit thickness.The results in experimental block showed that final oil out put and recovery ratio had increased by 31.21 ×l0~4t and 1.54%respectively,this met the object of effectively developing the remaining oil.While changing water intake per unit thickness had obvious effects on final development effectiveness,recovery ratio firstly increased and then decreased with the increasing water intake per unit thickness,and an optimum water intake per unit thickness also existed,it is 9m~3/d·m.