裂缝型低渗透油藏的水窜治理对策——以扶余油田为例

扶余裂缝型低渗透油藏在注水开发过程中遇到了天然裂缝水窜、人工裂缝水窜以及高渗层水窜三种类型窜流。不同类型的水窜应该采取不同的治理对策才能达到提高采收率的目的。对于具有强烈方向性和普遍性的天然裂缝窜流,应该在认清裂缝方向的前提下采用沿裂缝方向部署注水井排的注水方式进行治理;对于人工裂缝窜流和高渗层油藏,应该在认清对应注采关系的前提下采用深部封窜技术进行治理。按照上述对策对扶余油田的水窜问题进行了治理,获得了较好的效果。

Countermeasures for Treating Water Channeling in Fractured Low-Permeability Reservoirs

In Fuyu fractured low permeability reservoir, 3 kinds of water channelings were induced in water flooding, such as water channeling in natural fractures, water channeling artificial fractures and in high permeability beds. For the purpose of enhancing oil recovery, different countermeasures were taken for different types of reservoirs. For water channeling of natural fractures with strong directional property and generality, the treatment was conducted by arranging injecting well array along the fractures, in which fracture direction was previously clarified. For water channeling in artificial fractures and high permeability reservoirs, corresponding injecting-producing relation was clarified, it was treated by sealing in depth. The countermeasures are used in Fuyu Oilfield and better effect is obtained.