辫状河流沉积油藏注聚初期调整方法及效果

Adjustment of Development Measures for Braided River Sedimentary Reservoir in the Early Period of Polymer Flooding and Its Result

针对孤岛油田中一区 Ng5 - 6砂质辫状河沉积油藏 ,注采对应程度较低 ,平面矛盾突出 ,在注聚初期表现出了与曲流河沉积油藏不同的动态特点 ,在深化油藏地质特征认识的基础上 ,分析了注聚初期油藏动态变化特征 ,采取了完善井网、水井调剖、调整产液结构等措施 ,取得了良好的开发效果 ,2 0 0 1年累计增油 2 .2× 1 0 4

The reservoir in Zhongyi area of Gudao oilfield is braided river deposition, its injection-production consistency is poor and plane inconsistency is obvious. Its dynamic characters are different from that of meandering river sedimentary reservoir in early period of polymer flooding. Based on the thorough study of the geological characters of the reservoir, its dynamic characters are analyzed. Through adopting a series of measures, such as optimizing well pattern, plugging water, adjusting production construction etc., a good development effect is achieved, and the cumulative increment of oil production in 2001 is 2.2×10 4t.