青海东部农业区生猪养殖技术

Analysis of Factors Affecting Gel Displacement Control in Steam Flooding Based on Shan 56

青海省东部农业区生猪养殖从散养逐步向养殖小区、规模化、现代化发展，但农户散养仍然占很大的比重。由于当地年平均气温比较低，养殖时间短，散养农户不注重饲养技术致使养殖经济效益比较低下。为了使农村散养户提高经济效益，进一步掌握生猪养殖技术，对近年的推广生猪养殖技术要点进行总结。

Steam injection is an essential method in exploiting heavy oil reservoir. Because of the thermal effects in a long time and high heterogeneity in the stratum itself,steam channeling always happens,which affects production seriously in the steam stimulation and steam flooding process. The viscosity of heat sensitive gel increases with the temperature and then changes reversibly within a certain range,which is suitable for depth displacing adjustment in steam injection. Based on the geological data in pilot area of Shan 56,a geological model was established.Mechanism of displacing control was analyzed; meanwhile the effect of geological parameters such as vertical channeling,net thickness and operating parameters on production was studied according to simulation results. The numerical simulation results are as follows： parameters such as vertical permeability,net-to-gross,initial oil saturation and depth will certainly affect recovery and displacing. Taking economy into account,0. 1 PV gel injection is chosen. The later gel is injected,the worse the development results. After the total recovery displaced by stimulation and gas flooding reaches 30%,the development effect is reduced significantly,therefore. Only before recovery reaches 30%,the gel injection is more effective.