窄小砂体油田交联聚合物深度调剖可行性研究

The Feasibility Study on the Depth Profile Control with the Cross-linked Polymer in the Narrow Sand Body Oilfield

大庆长垣南部窄小砂体油田 ,砂体多呈条带状或枝网状分布 ,油层层内层间非均质较严重 ,在目前的高含水期 ,采用常规的水驱开采方法很难挖潜。以长垣南部葡北油田的砂体沉积特点为基础 ,在室内研究的基础上 ,通过矿场试验 ,论证了长垣南部水下窄小砂体油田交联聚合物深度调剖的可行性。研究结果表明 ,交联聚合物深度调剖技术在窄小砂体油田的应用是可行的 。

The oilfield in the south of Daqing Changyuan characterizes the narrow sand body most of which distributes in the shape of straps or net structures. Because of the heavy interlayer and in layer heterogeneity, it is difficult to realize the maximum utilization by the traditional water flooding methods at the present high water cut stage. This paper introduces the sedimentary features of the narrow sand body of the Pubei oilfield in southern Changyuan. The results based on the laboratory study and the fieldwork experiment demonstrate that it is feasible to control the depth profile in the narrow sand body by using the cross linked polymer. The results also indicate that the technology of depth profile control with cross linked polymer is one of the effective methods to enhance oil recovery for the oilfield with characteristics of the narrow sand body.