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

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

//// (j) Kismarjai. Drilling time: 4 January 1944 to 29 February 1944. The drilling of the well was uneventful and showed no traces of hydrocarbons. There are two cement plugs between 2,296.6—2,460.6 and 492.1— 410.1 ft, 492.1 ft, of 9—5/8" casing was cut and pulled out, (k) K i s m a r j a 2. Driling time: 20 May 1944 to 8 August 1944. The well reached the basement rock without shows and was abandoned. No production tests were made. (1 ) Körösszegapáti 1. Drilling time: 4 February 1943 to 30 April 1943. At a depth of 4,451.5 ft, there was suddenly a circulation loss and a blow-out occurred. The drill pipe was run to the bottom, and after an eruption of 26 hours the well was shut with 4"/3" Christmas Tree. The production tests showed 1,942,050 cuft gas/day through a 2/8'' bean. Gas pressure was 172 atm. During this production test, 19.8 US gallons of oil were recovered. It was tried several times to kill the well with Hematite and Baryte circulation mud, but this was unsuccessful because of the strong foam formation. (m) Körösszegapáti 2. Drilling time: 12 June 1943 to 7 December 1943. Beginning from 4,417.76 ft, the Passler pilot core barrel was again used, which slowed down the drilling speed. The well reached the basement rock without incidents. Two production tests were made, the first with a liner between 4,944.38—5,026.4 ft, which showed slight traces of gas. For the second test the 6—5/8" casing was perforated by the Schlumberger method with 40 shots between 4,708.16— 4,724.56 ft, and 4,888.6—4,908.29 ft. Result: 883 cu ft gas/day. (n) Körösszegapáti 3. Drilling time: 12 October 1943 to 4 March 1944. The well reached the basement rock without incidents. A production test was made between 5935.19—6037.86 ft, with gas lift from well No. 1. The cores of these wells showed good oil traces and had a strong