Log-derived physical properties of hydrates
by Stephen Prensky, 1995
Log-derived physical properties for in-situ pure (massive) gas hydrate
(from Kvenvolden and McDonald, 1985; Mathews, 1985)
| Property |
Hydrate |
Water-saturated
(average) |
Acoustic velocity
_Vp (km/sec)
_transit time
(µsec/ft) |
3.6
84.7 |
1.5-2.0
203-152 |
Resistivity (ohm-m)
_Apparent
_Corrected |
150
175 |
1-3
|
| Bulk density (apparent)(gm/cm3) |
1.04-1.06 |
1.75 |
| Neutron Porosity (percent, limestone units) |
50-60 |
70 |
References:
- Kvenvolden, K.A., and McDonald, T.J., 1985, Gas hydrates of the Middle
America Trench--Deep Sea Drilling Project leg 84, in S. Orlofsky, ed., Initial
Reports of the Deep Sea Drilling Project, v. 84: U.S. Government Printing
Office, p. 667-682.
- Mathews, M.A., 1985, Logging characteristics of methane hydrate, paper
K, in 10th formation evaluation symposium transactions: Canadian Well
Logging Society, 62 p. Later published in 1986: The Log Analyst, v. 27, no. 3,
May-June, p. 26-63.
- Prensky, S.E., 1995, A review of gas hydrates and formation evaluation
of hydrate-bearing reservoirs (paper GGG), presented at1995 meeting of the
Society of Professional Well Log Analysts, Paris, France, June 26-29.
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