Deep Fluid Diversion for Profile Control and Oil Displacement Technologies

Through 50 years of water injection production, Daqing Oilfield has developed matched chemical and mechanical zonal<br>injection and production technologies. However, due to residue oil scattering here and there, and serious low effective and<br>non-effective circulations happening in high watercut period, the existing profile modification system can hardly meet<br>reservoir requirements. In later high watercut stage, to enhance water flooding recovery rate is our new challenge. Based on<br>profile control technology, we’ve developed low cost, long efficiency deep fluid conversion profile control and oil<br>displacement technologies, and high efficiency fine control water injection technologies, which contribute to the accuracy of<br>water injection, and recovery rate rise of 2-3% in reservoirs with watercut above 90%.