Sonar surveys under challenging conditions in gas at very low pressure and in crude oil

• Autorzy: Hasselkus F. , Reitze A.
• Języki publikacji: EN

Abstrakty

EN

Sonar surveys have for decades been the established technique for the regular monitoring of gas and oil storage caverns. So as to have the best possible basic physical conditions gas caverns should be under the highest possible pressure at the time they are surveyed. This is all the more important the greater the distances to be measured. With regard to caverns located deeper than 1000 m pressures > 150 bar provide a good basis for achieving qualitatively reliable and focused measurements. Surveying shallow caverns with a low maximum pressure < 100 bar or caverns that for operational reasons have to be under low pressure is considerably more challenging than a “standard survey” under high pressure. The lower the pressure the higher the attenuation of the acoustic waves. Consequently to be able to interpret these reflections the measuring system must be in a position to amplify the significantly attenuated signal reflections by a suitable amplifier technology and by applying mathematical correlation techniques. Furthermore special transducer technology is necessary when working at such low pressures. Surveys in caverns at pressures between 80 and 90 bar had been carried out successfully for years. Then the task of surveying gas caverns with a pressure of just 45 bars presented a new challenge. Indeed, to obtain qualitatively usable results under these demanding basic conditions it was essential to have sophisticated transducer technology as well as high performance transmitter and receiver equipment. By carrying out special developments and modifications in this area equipment has been designed which enables distances of more than 85 m to be measured even if the pressure is as low as 45 bar. This provides the customer with a means of monitoring all parts of those caverns which previously were internally regarded as “unsurveyable” without having to flood the cavern with brine. The technical changes that have been made not only bring about advantages in terms of measuring greater distances at low pressure, but also provide extra performance. In caverns with an extremely long extension (e.g. elongated fingers due to leached potash zones, steeply inclined bedding and so on) it is now possible to measure considerably longer distances. In some cases it is even possible to measure distances of well over 100 m in gas or crude oil.

Słowa kluczowe

EN

sonar; cavern surveying; low pressure; gas cavern monitoring

PL

sonar; badanie kawerny; niskie ciśnienie; monitorowanie komory gazowej

• Wydawca: Polskie Stowarzyszenie Górnictwa Solnego
• Czasopismo: Przegląd Solny
• Rocznik: 2015
• Tom: T. 11
• Strony: 109--115
• Opis fizyczny: Bibliogr. 4 poz., rys., tab.

Twórcy

autor

Hasselkus F.

• SOCON Sonar Control Kavernenvermessung GmbH, Windmühlenstr. 41, 31180 Giesen – Germany

autor

Reitze A.

• SOCON Sonar Control Kavernenvermessung GmbH, Windmühlenstr. 41, 31180 Giesen – Germany

Bibliografia

• REITZE, A. & VON TRYLLER, H. 2004: The Influence of Physical Conditions Inside a Cavern on Execution and Evaluation of Sonar Surveys, SMRI Spring Meeting, Syracuse, USA, (2005)
• REITZE, A., VON TRYLLER, H. & HASSELKUS, F., 2007: Execution and analysis of sonar surveys to support rock-mechanical evaluations. In: The Mechanical Behaviour of Salt – Understanding of THMC processes in Salt – Wallner, Lux, Minkley & Hardy,Jr. (eds), Taylor and Francis Group, London, ISBN 978-0-415-44398-2
• MCCARTNEY, J.; CARTWRIGHT, M.; REITZE, A., 2011: Sonar Surveying of Caverns at the Markham Salt Dome and 3D Modeling of the Entire Cavern Field, SMRI Spring Meeting, Galveston, Texas, USA.
• REITZE A.; HASSELKUS F., 2012: Performance and Efficiency of Sonar Surveys in non-halite Salt Caverns, SMRI Spring Meeting, Regina, Sasketchewan, Canada.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).