Patent EA-002074-B1 (EA)
Title: Acoustic method (arwl) for applying an action on a well and on the layer of a field of mineral resources
Inventor: ORIENTLIKHERMAN ISAAK ARONOVIC
IPC: E21B43/00
Filed: 1999-10-08
Abstract: 1. An acoustic method (ARWL) for applying an action on a well an on a layer of a field of mineral resources comprising steps of acoustic application of an action on perforated zones of the well with sequentially treatment and combining pressure and time of application, characterized in that involves applying a complex acoustic action and carrying out a selective treatment of the perforation interval and of the producing strata of the layer using a directed acoustic field in order to combine the pressure, the duration and the range of the action, using sound and ultrasonic signals with directivity characteristics from 10 to 180 degree , acoustic pressure values from 10 to 70 kPa during time equal to the effective period of application, with the range of action equal to the initial effective range of action from 0,05 to 10 m. 2. The method of claim 1, characterized in that the treatment is carried out according to a basic mode that involves sequentially treating the well perforation interval and the producing strata of the layer using three acoustic signals, having the following features: the directivity characteristics 45 degree , the acoustic pressure 10 kPa during 2 hours per meter of perforation, with the range of action equal to the initial effective range of action 0,05 m; the directivity characteristics 15 degree , the acoustic pressure 45 kPa during 2 hours per meter of perforation, with the range of action equal to the initial effective range of action 3 m; the directivity characteristics 10 degree , the acoustic pressure 70 kPa during 2 hours per meter of perforation, with the range of action equal to the initial effective range of action 10 m. 3. The method of claim 1, characterized in that separate stretches of the perforated zone are treated by a combination of the basic mode signals: mudded zones of the perforated intervals of injection and production wells are treated in the basic mode that involves sequentially treating the well perforation interval and the producing strata of the layer using three acoustic signals, having the following features: the directivity characteristics 45 degree , the acoustic pressure 10 kPa during 2 hours per meter of perforation, with the range of action equal to the initial effective range of action 0,05 m; the directivity characteristics 15 degree , the acoustic pressure 45 kPa during 2 hours per meter of perforation, with the range of action equal to the initial effective range of action 3 m; the directivity characteristics 10 degree , the acoustic pressure 70 kPa during 2 hours per meter of perforation, with the range of action equal to the initial effective range of action 10 m; working zones of the perforation interval of injection wells with a low injectivity or production low-watered wells are treated by a combination of second or third signals of the basic mode, having the following features: the directivity characteristics 15 degree , the acoustic pressure 45 kPa during 2 hours per meter of perforation, with the range of action equal to the initial effective range of action 3 m; the directivity characteristics 10 degree , the acoustic pressure 70 kPa during 2 hours per meter of perforation, with the range of action equal to the initial effective range of action 10 m, working zones of the perforation interval of injection wells with a high injectivity or production highly-watered wells are treated by a combination of third signals of the basic mode, having the following features: the directivity characteristics 10 degree , the acoustic pressure 70 kPa during 2 hours per meter of perforation, with the range of action equal to the initial effective range of action 10 m.