Open AccessTo the issue of optimizing the application of the sealing equipment in the injection well at the long-term pulsed water injection into it
Author(s) -
M.Ya. Khabibullin
Publication year - 2019
Publication title -
izvestiâ vysših učebnyh zavedenij. neftʹ i gaz
Language(s) - English
Resource type - Journals
ISSN - 0445-0108
DOI - 10.31660/0445-0108-2019-3-77-85
Subject(s) - operability , leakage (economics) , amplitude , impulse (physics) , annulus (botany) , environmental science , petroleum engineering , mechanics , materials science , nuclear engineering , marine engineering , geology , engineering , physics , composite material , reliability engineering , optics , quantum mechanics , economics , macroeconomics
When determining the operability of the sealing elements, it is necessary to take into account the overall movement of the packer during operation, which it passes before the damage of the sealing elements when fixing the leakage failure in the annulus. It should be noted that as the frequency and the amplitude of the pressure of injected liquid pulses increase, the distance travelled increases proportionately. According to preliminary calculations, the average leakage volumes of injected fluids are in the range 0,005 ... 0,1 cm 3 /m 2 with the prevalence of possible leakages at the level of 0,05 cm 3 /m 2 . As a result of preliminary calculations, it was found that the average performance of mechanical packers in the case of nonstationary waterflooding impulse before identifying significant leaks was 30,000...50,000 km. It should be taken into account that with increasing frequency and amplitude of the pressure of pulses in the injected fluid, the operability and longevity of the packer seal reduce. The article suggests recommendations for improving the reliability of packers for long-term pulsed water injection into injection wells.