Abstract
This investigation was conducted to obtain a correlation of the bubble-point pressure of a reservoir fluid with its composition and temperature. It is part of an overall program to develop correlations for the essential properties of reservoir fluids with their composition, temperature, and pressure. Data from 665 measurements on 489 different oils were obtained, including the bubble-point pressure at the formation temperature, and the composition of the oil. The composition was expressed in terms of the hydrocarbons methane through heptanes plus, molecular weight and specific gravity of the heptanes plus, and the contaminants hydrogen sulfide, carbon dioxide, and nitrogen, A regression analysis technique was used on the IBM 709 Computer to correlate the bubble-point pressures with the other data. When the data were segregated into two groups based on the methane content, an average deviation of 12.9%, for the oils containing up to 20%, methane and 4.9%, for oils containing over 20%, methane is obtained. By segregating the data into 6 groups on the same basis, deviations ranging from 3.52%, to 8.95%, and averaging 4.717. are obtained. A correlation was also developed for binary mixtures, which expresses the bubble points of mixtures of methane with n-butane, n-pentane, n-hexane, cyclohexane, benzene, and n-dec.ane over a range of temperature from 100°F to 220°F with average deviations from 0.313%, to 2.86%, . The correlations presented may be useful in predicting reservoir behavior and may avoid the necessity of time-consuming laboratory measurements.
Miesch, Edward Peter (1964). Correlation of bubble-point pressure with reservoir fluid composition and temperature. Doctoral dissertation, Texas A&M University. Texas A&M University. Libraries. Available electronically from
https : / /hdl .handle .net /1969 .1 /DISSERTATIONS -174052.