PROBLEM 1.17 Estimate the viscosity of a gas condensate fluid at 7000 psia and 220°F. It has a specific gravity of 0.90 and contains 2% nitrogen, 4% carbon dioxide, and 6% hydrogen sulfide.
ANSWER: ° Ppc = 756.8 − 131γg − 3.6γ 2 g = 636 psia 2 °¯T pc = 169.2 + 349.5γ g − 74γ g = 424° R
γ = 0.90®
from fig1 − 9 → M1 = 0.0117 cp correction for CO 2 = 0.0003 cp correction for N 2 = 0.00024 cp correction H 2s = 0.00032 cp → M 1 = 0.0117 + 0.0003 + 0.00024 + 0.00032 = 0.01256cp P 7000 ° Ppr = P = 636 = 11 M pc ° → fig1 − 10 → =3 ® M1 °T = T = 680 = 1.6 °¯ pr T pc 24 M = 3(0.01256) = 0.0376cp
PROBLEM 1.18 Experiments were made on a bottom-hole sample of the reservoir liquid taken from the LaSalle Oil Field to determine the solution gas and the formation volume factor as functions of pressure. The initial bottom-hole pressure of the reservoir was 3600 psia and bottom-hole temperature was 160°F; so all measurements in the laboratory were made at 160°F. The following data, converted to practical units, were obtained from the measurements:
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