TY - JOUR N2 - The results of drill stem tests made on the autochthonous Miocene deposits of the Upper Badenian - Lower Sarmatian age in the Carpathian Foredeep were analyzed. Reservoir tests were performed in open and cased holes, where inflows of formation water of varying saturation degree and sometimes contaminated with drilling mud filtrate, were observed. A total of 58 intervals, geophysically qualified as gas-bearing, were analyzed. Statistical analysis methods were used for determining the influence of the formation depth on the depth of deposition of the Miocene, and also dependence of initial back-pressure exerted on the reservoir during DST, on the depth of deposition of the reservoir. No correlation was found between water flow rate and initial differential pressure. A satisfactory correlation was obtained between hydrostatic pressure of water cushion in the tubing string and reservoir pressure for selected 22 the Miocene intervals in the Dębica region. In this region the pressure quotient php/pz broadly ranged between 0.05 and 0.57. Another correlation was noted between initial back-pressure and a depth at which pressure was measured and initial back-pressure, and formation water flow rate. The regression equations determined with statistical methods can be used for predicting values of formation pressure, initial value of back-pressure, formation water flow rate and initial differential pressure during DST. On this basis technological parameters of successive reservoir tests can be determined for in the analyzed area of the Carpathian Foredeep, particularly in the Dębica region. L1 - http://www.journals.pan.pl/Content/85656/PDF/art-09-dubiel-uliasz-misiak.pdf L2 - http://www.journals.pan.pl/Content/85656 PY - 2012 IS - No 1 EP - 171 DO - 10.2478/v10269-012-0009-z KW - Drill tests KW - Miocene KW - Carpathian Foredeep KW - depression KW - repression KW - flow rate KW - formation water KW - statistical analysis A1 - Dubiel, Stanisław A1 - Uliasz-Misiak, Barbara PB - Komitet Zrównoważonej Gospodarki Surowcami Mineralnymi PAN PB - Instytut Gospodarki Surowcami Mineralnymi i Energią PAN VL - vol. 28 DA - 2012 T1 - Influence of differential pressure on formation water flow rate during tests of the autochtonous miocene deposits in the Carpathian Foredeep with DST SP - 157 UR - http://www.journals.pan.pl/dlibra/publication/edition/85656 T2 - Gospodarka Surowcami Mineralnymi - Mineral Resources Management ER -