Three-Dimensional Physical Simulation And Numerical Simulation Research On Heavy Oil Reservoir Steam Drive

Heavy oil reservoir is widespread and abundant in our country. With the declining of conventional crude oil production and the rising of international oil price, heavy oil exploitation becomes more and more important to relieve the energy crisis. Most of the heavy oil is exploited by using steam huff and puff method at present. Although the method has gotten some achievements, it is confronting with a lot of questions. For instance, most well enter into high water cut stage after multiple huff and puff, the development of steam huff and puff become worse.Domestic and international research shows that steam drive is the primary means to further enhance oil recovery at the later of steam huff and puff. Nowadays many oil fields in our country have started steam drive pilot project. In order to support the design of pilot project, the paper used three-dimensional physical simulation method and numerical simulation method to study the steam drive in Shengli oilfield Zhongerbei reservoir. This paper derived the scaling criteria of high pressure and high temperature three-dimensional physical simulation model for steam drive. We got the model parameters and operation parameters of the physical model according to Shengli oilfield Zhongerbei reservoir and the scaling criteria. The effects of the oil viscosity, porosity, reservoir temperature and steam injection rate, steam quality etc. on the production and temperature field were studied. The results showed that the steam injection rate of Zhongerbei block should be more than 140t/d. High steam quality will get high production. The paper studied foam assisted steam drive technology to deal with the question of production decrease caused by steam channeling. Water cut of high permeability zone was decreased from 96.63% to 83.7% and water cut of low permeability zone was decreased from 90.58% to 79.05% after injected foam. The results showed that foam assisted steam drive technology can improve the drive profile and repress steam channeling. Additionally, this paper researched the effect of temperature on oil/water relative permeability curve. Irreducible water saturation increased and residual oil saturation decreased with the increase of the temperature. Numerical simulation model was built by history matching the experimental results. The effects of the geological parameters and injected parameters on the heavy oil production were studied by numerical simulation method.