It is the purpose of this paper to present the results of experimental studies and discuss about the effects of clays and clay minerals upon relative permeability curves. The relative permeability measurements were carried out on artificial and natural samples. And then, Size Analysis, Differential Thermal Analysis and Spectral Analysis were conducted on an oil sand core in order to examine the clays and clay minerals.
Previously the cement squeezing was tried to shut off the gas channeling zone of VIII and IX reservoirs in Yabase oil field which was induced by gas injection, but no good result was obtained. This time oil injection has taken the place to remedy the gas channeling successfully. Especially most of trials carried out at 22 wells during 1956 fiscal year successfully decreased their produced gas oil ratios. The study has been made on analysis of their results, especially relating to skin effect and relative permeability relation.
The author solves analytically a boundary-value problem [cf. formulae (1)-(7), or (1), (2)', (3)-(7)] on 2-dimensional and 2-phase flow of incompressible fluids, when reservoir is extensive, dipping and plane, and when only one water injection well with constant injection rate or with constant pressure is penetrated into the reservoir, and when the pressure at each point on reservoir boundary is kept its initial value proportional to its depth [cf. Fig. 1]. The results obtained by this study are as follows: 1. velocity potential in injected water zone and oil zone [cf. formulae (12), (13), or (12)', (13)'] 2. stream-function in those zones [cf. (15), (16), (15a), (16a), or (15)', (16)', (15a)', (16a)'] 3. complex velocity potential in those zones [cf. (17), (18), or (17)', (18)'] 4. pressure distribution in those zones [cf. (19), (20), (19a), (20a), or (19)', (20)', (19a)', (20a)'] 5. time variation of injection well pressure when injection rate is constant [cf. (21), (21a)] 6.time variation of injection rate when injection well pressure is constant [cf. (21)', (21a)'] 7. the fact that the form of water-oil interface is a generalized cardioid [cf. formulae (14), (14a), Fig. 2, or (14)', (14a)', Fig. 2'] 8. influences on the form of time elapsed, angle of dip of oil reservoir, water injection rate or pressure-difference, mobilities and density-difference [cf. Fig. 3, 4, 5, 6, or Fig. 3', 4', 5', 6']