Отправлено: 28.06.07 02:58. Заголовок: Определение акустических свойств с использованием данных PVT

Determination of the Acoustic Properties of
Hydrocarbon Rich Gases Using PVT Relations
A. Shams* (Heriot-Watt University), C. Macbeth (Heriot-Watt University) & F. Gozalpour (Heriot-Watt University)

SUMMARY
Published approaches for determining the seismic properties of pore fluids are investigated to examine the
effect of gas quality at constant pressure and temperature. For this purpose, a range of fluids from natural
gas to rich gas condensate is prepared and tested to determine pertinent acoustic properties of the fluid at
single-phase conditions. The results show that the ratio of heat capacities of fluids in currently used
models do not vary with the change in gas quality, consequently the calculated gas bulk modulus may not
appropriately reflect the fluid composition dependency. Therefore a new approach is suggested in this
work to calculate the ratio of heat capacities of gases where the effect of gas quality is taken into
consideration. This leads to an increase in accuracy of predicted seismic property changes for gas
condensate and other gas reservoirs.

Приводится новая 4-х параметрическая аппроксимация для сжимаемости газа и сравнивается с результатами эксперимента по пяти видам газа и с аппроксимацией из публикации
Batzle, M., and Z. Wang, 1992, Seismic properties of pore fluids: Geophysics, 57, no.11,
1396-1408.