Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 41. (Budapest 1948)

Szurovy, G.: Geological structure of the Southern part of the Great Hungarian Plain

//// (f) Tótkomlós 6. Drilling time: 22 May 1943 to 20 September 1943. From the depth of 4,429.3 ft, in order to avoid sudden circulation losses, the Passler pilote core-barrel was used, thereby reducing the drilling speed. The well reached the Trias beds without incidents and, as no oil or gas traces were encountered, was abandoned without conducting any production tests. (g) Ferencszállás 1. Drilling time: 5 August 1942 to 9 May 1943. A twist-off occurred at a depth of 8,051.5 ft deep when the well was 8,441.9 ft, deep. The fishing job was unsuccessful. In the meantime, the well started to overflow and, therefore, it had to be shut in. Production tests showed 45.28 barrel water per hour, through 5/16"' bean, with small gas shows. The water temperature was 45—58° C. The well was killed at a back pressure of 130 atm and was shut in with a cement plug between 6,581.7—6,187.8 ft. A second production test between 6,023.7—6,030.3 ft, showed 12.58 barrel/hr. water with a temperature at the outflow of 53" C. Afterwards a cement plug was set with 40 sacks of cement between 6,030.3—5,863 ft, A total of 2,914.0 ft, 6—5/8" and 982,5 ft, 9—5/8" casing was pulled out. This well is the deepest so far drilled in the Plain. (h) Sándorfalva 1. Drilling time: 21 August 1942 to 6 January 1943. The drilling bit got stuck at a depth of 6,546 ft, by overburdening of the drill pipe through pulling, the bit broke at a depth of 118,1 ft. Until 20 March the well could be freed down to 4,084 ft, by pulling the drill pipe; the well was then side-tracked by whipstocking and drilled to 5,105 ft. But in spite of this, the well had to be abandoned as the depth intended could not be reached due to the narrowing. (i) Madaras 1. For reasons already given, this well had to be abandoned at a depth of 988.81 ft.