Magyar Szenhidrogenipari Kutato-/fejleszto Intezet

Geza Udvardi

Tibor Paal

Sandor Doleschall

Gyula Milley

Antal Szittar

Jozsef Papay

Gyorgy Tiszai

Gyorgyi Gaal

Miklos Kristof

Zoltan Biro

Sandorne Bauer

Eva Farkas

A method for injecting water into fluid storing rocks containing clay minerals, in particular in hydrocarbon sites formed by sandstones, sands, marlaceous sandstones, water storing rocks, geothermic circulation sites, in zones in the vicinity of wells, extending to large sites. Continuously or discontinuously compounds are introduced into the storing rocks having a hydrated cation diameter in the range between 0.13 and 0.15 nm, a coordination number 12. The compounds are preferably potassium-, and/or ammonium-, and/or zirconium salts. Depending on the clay content of the storing rock, stabilization is performed by using a solution of the enumerated salts in a concentration of 0.1-500 g/l, advantageously 0.1 to 300 g/l, and in a quantity of 0.5 to 5000 m.sup.3, preferably 50 to 3000 m.sup.3, which is related to the vertical dimension of the rock, expressed in meters.

Method for injecting water in fluid-storing rocks containing clay

There is provided a process for the enhanced recovery of oil from oil bearing strata with gaseous or liquid form of carbon dioxide, the improvement which comprises prior to or simultaneously with the injection of carbon dioxide, injecting into the strata in a single slug or in a plurality of slugs a material consisting essentially of at least one compound which has a clay-effect inhibiting cation with a hydrated ion diameter of from about 0.136 to about 0.15 nm and a coordination number of 12, in a concentration number of 12, in a concentration of from about 0.001 mol to about 50 mol.

Enhanced oil recovery

Growing community of inventors

Nagyanizsa, Hungary

Geza Udvardi