Study On The Matching Between Deep Profile Control System And Oil Reservoir And On The Dynamic Characteristics Of Physical Simulation

Along with the development of the national economy for crude oil productionincreased demand increasing and to ensure the national petroleum strategic security, how toutilize new technologies, reacquaint and rational exploitation of old oil fields, formulate andimprove development systems, fast enhanced oil recovery, thereby increasing recoverablereserves, has become the most important task in petroleum technology personnel worktoday. Deep profile control is a new technology of the secondary development areas of oldoil fields, it is very important to further improve the recovery of high water-cut stagesandstone reservoir. Part of China’s oil fields has carried out deep profile control pilot, thepilot shows the technology process is relatively simple, high oil increase, good economicreturns and many other advantages of deep flooding, will become a major stage of thefollow-up development of the old oil field. Deep profile control has also exposed someproblems in the implementation process. Including whether it is matching between deepprofile control system and oil reservoir, whether the system viscosity has limits, themechanism and the dynamic characteristics of physical simulation are unclear and othertechnical problems. Therefore, in view of these issues, it studied on the matching betweendeep profile control system and oil reservoir and on the dynamic characteristics of physicalsimulation.Using the similarity transformation method to get the similarity criterion numbers,through modeling to get the similarity criterion table, this paper realized parameterstransformation between the reservoir and the model. Then it filtered out six profile systemformulas and viscosity boundary matching the reservoir. Based on these it studied theinfluence of heterogeneity, viscosity ratio on the flooding effect and apply the saturation,pressure field monitoring system to study the dynamic characteristics of physical simulation.Indoor experimental results showed that the coefficient of variation was larger, the moreheterogeneous degree, the better the effect of deep flooding; When the viscosity ratio wasbetween6.54~14.56, the recovery ratio increased with the increasing of viscosity ratio,when the viscosity ratio was greater than20, the recovery ratio remained stable; if injectingthe same t flooding system, the higher oil viscosity was, the higher recovery efficiency, thebetter deep flooding effect; if making the injected times early, it could increase theproduction speed. Finally it studied the location technology of the flooding agent, found thatto inject profile control agent in the high permeability zone can achieve the ideal effect. In the conditions allow, it can inject the flooding agent into the idle wells in the main linebetween injection and production wells, to optimize the placement of profile control agent.