Vibrating method to enhance oil recovery

Abstract

A vibration impact method on to enhance oil and gas recovery from productive geological formations by controlling phase surfaces of seismic waves to focus elastic energy on localized areas.

What is claimed is: 
     
         1 . A method of enhanced oil recovery through elastic impact on productive formations based on the use of vibration sources and control units utilizing seismic surveys. The method is characterized by the concentration of elastic energy on local areas in the rock massif, with the dynamic, duration and intensity of the impacts regulated according to the distribution, shape, size, and location of the effect zone. The method utilizes numerous elastic wave sources located at varying distances from each other. In accordance with these distances and the distribution of the massif's elastic parameters of the massif, the start time, duration and parameters of the emitted signals are tuned for each oscillation source to focus waves in a given zone of impact. The energy efficiency necessary for enhanced oil recovery is achieved through cyclical repetition of focused elastic impact action. Damage to environment and to the production infrastructure are also minimal compared to other methods. 
     
     
         2 . A method according to  claim 1 : To optimize the elastic impact on the porous collector and the hydrocarbon-fluid in the pore space, several groups of oscillation sources are used—each of which is tuned so that the wave can be focused with the different dynamic characteristics needed to influence the rock and fluid, respectively. As the elastic waves from vibrational sources are being focused, their spectral composition and the duration of elastic oscillations stream (sweep-signal parameters) can also be altered. 
     
     
         3 . A method according to  claims 1 - 2 : In order to improve the efficiency of oil recovery enhancement, the focusing of elastic energy is consensual in time with other processes of the fluid inflow intensification, such as a depression and repression sequences, ultrasonic, electromagnetic and magnetostrictive stimulation methods in the wells. The dynamics of the elastic action—and, accordingly, the operating modes of the vibration sources (groups of sources)—are consistent with the dynamics of these processes.