Numerical Simulation Research Of Inject Foam Control Water Channeling Technology For The North Third Areas In Daqing Oilfield

The oilfield of La Saxing was developed for over 50 years, it uses the way of water injection to develope the oilfield.The status is very differente on the longitudinal direction. A lot of water injection spearhead along the high penetration, result in a series of problems such as high water channeling obviously in permeability channel, injection water inefficient, ineffective circling serious. Water content of basic well nets and adjustment wells has already over 90%. But annual oil production in Changyuan oilfield had account for 68.8% of the total oilfield. Therefore, the improving of water flooding development is still the focus work of the oilfield development.Foam has the automatic selectivity on high aquifer and permeability layers. It can produce larger resistance to flow in high penetration and water channeling passageways. It also can reduce water quantity and improve the injection pressure. The key technology of foam injection is reasonable injection. Different reservoirs has different injection parameters. So in the basis of physical model experiment, the article is essential to study the best injection parameters of foam injection.According to the base mode which was provided by the three production factory and associated structures, this artical develops 3d geological model about the north 2 -ding 2-59 well group in north three zone. According to the related data such as the fluid high-pressure physical property, phase penetration curve experiment, reservoir primitive original temperature and pressure and so on, we establish a black oil reservoir model of three-dimensional three-phase, then do the historical fitting.At the same time it use the CMG - STARS software to simulate the methord of control water channeling. It was used in the north abbasov north 2 - butyl 2-59 well group, and optimize for each project. We considered many factors such as the injected order, slug size and gas to liquid ratio about injection parameters. The research shows that: site construction of north 2 - butyl 2-59 well group should adopt a slug continuous injection. The best injection of gas to liquid ratio is1.5:1. The best foam agents for the injection quantity is 10000 per stere, refer to the distribution of remaining oil in simulated period, the oil is surplus more nearby the B2-1-076 and B2-2-158 wells, injection quantity can be a little more split,while remaining less nearby the B22160 well , it can be split less about inject foam quantity .