| 摘要 |
A procedure for obtaining data to determine both residual and mobile oil saturations in the vicinity of a test well. The steps are (1) drill with oil or oil-base mud, (2) produce to remove oil filtrate, (3) run laterolog, microlaterolog and pulsed neutron capture log, (4) inject high salinity water, (5) run a second microlaterolog and pulsed neutron capture log, (6) inject fresh water, and (7) run a third pulsed neutron capture log. The data obtained from the logs of the procedure is sufficient to determine the residual oil saturation, the capture cross section of the rock matrix, the saturation exponent, the salinity of the water in the formation after production, and mobile oil saturation both in the oil filtrate invaded zone and beyond the invaded zone.
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