COMPOSITIONS FOR ENHANCED OIL RECOVERY

摘要

Disclosed herein are compositions and methods for increasing recovery of hydrocarbon compounds from hydrocarbon-containing subterranean fractured rock formations. Novel emulsions and fracturing fluids are provided. The fracturing fluids convert oil-wet rocks to water-wet, yet exhibit a low tendency of composition components to sorb to the rock. The fracturing fluids do not cause formation of emulsions with hydrocarbon compounds within the subterranean fractured rock formations.

主权项

1. A composition comprising
about 98 wt % to 99.999 wt % of a water source comprising high total dissolved solids;
one or more oil phase surfactants, the oil phase surfactants characterized as nonionic and having a combined HLB of less than about 9; one or more coupling agents; one or more water phase surfactants, wherein the water phase surfactants are nonionic, soluble or dispersible in water, and chemically different from the one or more oil phase surfactants; one or more ionic surfactants; and one or more clay stabilizers.