Patent ID: 8602099

Claim:
A process for the production of mineral oil from underground mineral oil deposits in which at least one production well and at least one injection well have been sunk, comprising at least the following process steps: (1) forcing aqueous, gel-forming formulations (F) through an injection well into the mineral oil deposit, the formulations (F) comprising water and one or more chemical components, which, after being forced into the deposit, form gels under the influence of the deposit temperature, followed by (2) production of oil through at least one production well, wherein the deposit in the region between the injection well and the production well has a temperature distribution with a minimum temperature T min of ≧20° C. and a maximum temperature T max of ≦320° C., the temperature difference T max −T min being at least 20° C., in a step upstream of process step (1), the temperature distribution in the region between the injection well and the production well is analyzed, and in process step (1), at least two different portions of aqueous, gel-forming formulations (F) are injected successively into the formation, each of the portions being capable of gel formation at a temperature or in a temperature range within a span of from T min to T max , and the formulations differing with respect to the type of chemical components comprised and/or their respective concentration, with the proviso that the chemical components of the formulations and/or their concentration are chosen so that the gel formation temperature (T Gel ) and/or the gel formation time (t Gel ) of the second and optionally any further injected portion differs from that of the previously injected portion.