Recovery of oil from oil-bearing carbonates

Details Recovery of oil from oil-bearing carbonates Recovery of oil from oil-bearing carbonates

1983-12-19

1985-01-01

Gantz, Delbert E.

Mineral oils: processes and products

Products and compositions

Lubricating oils

C10G 104

Patent

active

044915128

ABSTRACT:
Oil is recovered from oil-bearing rock composed primarily of carbonates by treating the oil-bearing rock with an aqueous solution of an alkali metal compound selected from the group consisting of alkali metal silicates, alkali metal phosphates, and alkali metal borates at a temperature above about 150.degree. F. and then contacting the treated oil-bearing rock with hot water or a hot aqueous solution for a sufficient amount of time to extract the oil from the oil-bearing rock. Normally, the concentration of the alkali metal in the aqueous solution will be above about 0.5 molar and an organic solvent such as toluene, xylene or cyclohexane will be present in the treatment step. The oil-bearing rock will normally be an oil-bearing limestone containing a high viscosity oil which cannot be recovered using conventional hot water extraction techniques.

REFERENCES:
patent: 1820917 (1931-09-01), Longford et al.
patent: 2173842 (1936-12-01), Horner
patent: 2453060 (1948-10-01), Bauer et al.
patent: 2825677 (1958-03-01), Coulson

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