特低渗小断块油藏流场调整实践与认识——以东北分公司油田为例

Practice and understanding of flow field adjustment in small fault block reservoir with ultra–low permeability——By taking Northeast Oil & Gas Oilfield Company as an example

针对东北油气分公司特低渗小断块低品位油藏储量动用率低、开发成本高,难以形成效益开发的问题,开展了剩余油分布特征及其主控因素研究,提出了流场立体调整的对策。研究结果表明,特低渗小断块油藏具有平面、层间、层内三种剩余油富集特征及七种剩余油分布模式,水井分注、边外注水、注采调整、水井调驱等流场调整对策可实现不同剩余油分布模式中的流场立体调整。研究成果应用于现场取得了良好效果,提高了低品位油藏的开发效益。

Aiming at the problems of low-grade small fault block reservoir with ultra-low permeability in Northeast Oil&Gas Company,such as low production rate and high development cost,which are difficult to form effective development,the distribution characteristics of remaining oil and its main controlling factors are studied,and the countermeasures of three-dimensional adjustment of flow field are put forward.The results show that the small fault block reservoir with ultra-low permeability has three kinds of remining oil enrichment characteristics and seven remaining oil distribution patterns,and the three-dimensional adjustment of flow field in different remaining oil distribution patterns can be realized by means of flow field adjustment countermeasures such as water well injection,edge water injection,injection-production adjustment and water well profile control and displacement.The application of the research results in the field has achieved good results and improved the development efficiency of low-grade reservoirs.