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安塞油田王窑西南、候市等区块裂缝发育,动态监测和开发动态显示,储层裂缝具有明显的方向性,导致主向井见水较快,甚至水淹,产能损失严重;而侧向井长期不见效,影响区块的开发效果。通过对堵剂的耐温、抗盐、稳定性等静态性能和注入性、封堵强度、延缓交联等动态性能指标进行了室内评价,优选出了疏水缔合聚合物/水驱流向改变剂调剖体系。结合安塞油田实际,应用PI决策系统,进行施工参数优化设计,选取开发中后期的王窑和候市西南进行油藏深部调剖实验,确定调剖技术在不同油藏类型条件下的施工排量、施工压力、堵剂用量及注入工艺设计和调剖时机选择。现场实施整体调剖10口井,对应油井50口,见效20口井,见效比40%,累计降水10520.6m3。
In the southwestern and imperial cities of Ansai Oilfield, the crater development, dynamic monitoring and development shows that the fractures in the reservoirs have obvious directivity, resulting in the main well encountering water quickly and even flooding, with serious loss of productivity. The lateral well Long-term is not effective, affecting the development of the block. The indoor evaluation was made on the static properties such as temperature resistance, salt resistance and stability of the plugging agent, dynamic properties such as injection resistance, plugging strength and delayed crosslinking. The optimum conditions of hydrophobically associating polymer / water flow direction changing agent Profile control system. Combined with the actual situation of Ansai Oilfield, the PI decision-making system was used to optimize the construction parameters. The middle and late stage of Wang Yao and the southwestern part of the city were selected to carry out deep reservoir profile control experiments to determine the profile of profile control technology under different reservoir types Quantity, construction pressure, dosage of plugging agent and injection process design and timing of profile control. On-site implementation of the overall profile control 10 wells, corresponding to 50 wells, effective 20 wells, effective than 40%, cumulative precipitation 10520.6m3.